• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Complex of flat sheets, method for obtaining said complex, method for the manufacture of a container and method for packaging an object. The invention provides a complex of consecutively stacked flat sheets, configured to form a package in a single execution, wherein said complex comprises: at least a first die cut flat sheet, configured to fold and form a container wall, comprising a first continuous border delimited by an external contour and an internal contour, wherein said internal contour comprises a first portion and the external contour comprises a second portion, wherein at least one first main flange extends along the first portion of the internal contour in the opposite direction to the second portion of the external contour; and an assembly comprising at least one additional flat sheet, wherein the perimeter of the at least one additional flat sheet is delimited by the first flange of the first flat sheet. The invention further provides a method for obtaining the complex, a method for manufacturing a container, and a method for packaging an object. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2697705A1
    申请号:ES201730989
    申请日:2017-07-28
    公开日:2019-01-28
    发明作者:Nicolas Carlos Enguix；Alcala Pedro Zomeno；Puchol Miguel Rafael Alborch；Reverter José Garcia；Piquer Miguel Blasco；Huerta Sebastián Subirats
    申请人:AINIA；
    IPC主号:
    专利说明:

    [0001]
    [0002]
    [0003]
    [0004] OBJECT OF THE INVENTION
    [0005]
    [0006] The present invention is directed to a complex of consecutively stacked flat sheets, in particular the invention is directed to a complex for forming container containers of objects. Also, the invention is directed to a method for obtaining said complex. Preferably, the objects contained in the package are food products.
    [0007]
    [0008] In particular, the complex is formed from stacked flat sheets comprising collapsible tabs and allows the forming of the package in a single execution during the manufacturing stage. In addition, the present invention provides a method for packaging objects in said containers.
    [0009]
    [0010] BACKGROUND OF THE INVENTION
    [0011]
    [0012] The containers are containers or containers capable of housing objects for their conservation or transport. Among other functions, the containers allow to contain, protect, manipulate, distribute and serve as presentation for said objects. Depending on the size and shape of the objects, the containers can be adjusted to that shape to accommodate them closely, or they can be made baggy to contain various types of objects.
    [0013]
    [0014] On the other hand, just as there is a wide variety of uses and sizes, there is a variety of materials suitable for use, depending both on the characteristics of the object to be contained and on the conditions to which it can be exposed during its useful life. . According to the above, the materials used for the container can be metallic, textile, glass, plastics and derivatives, or of cellulose origin. Therefore, each of the materials used has different advantages and disadvantages.
    [0015]
    [0016] In particular, taking into account the packaging of cellulose origin, they form a group that includes
    [0017] ■ paper: the raw material for obtaining it is wood, and although it is possible to use other types of natural materials such as esparto, jute, straw, etc., its use in the paper industry is not so important. The main components of the fibers that make up the wood are cellulose, hemicelluloses and lignins, among which cellulose is the most important and which gives the characteristics of paper.
    [0018] ■ pressed cardboard: fibrous material, similar to paper but with several layers firmly joined together. Among the different layers, the upper layer that is usually coated (improving the properties of brightness, smoothness and printing), where the rest of the inner layers of the cartonboard are usually made of recycled material or virgin material.
    [0019] ■ Corrugated cardboard: Corrugated cardboard is the result of the union of several sheets of paper, which are kept equidistant because one or several corrugations are interspersed.
    [0020]
    [0021] Although many of the inherent advantages associated with the use of containers of cellulose origin are known, such as easy printing, easier recycling and coming from natural sources; there are disagreements when manufacturing and producing suitable containers for subsequent sealing, given their porous nature as well as the limited capacity of these materials to be stretched and welded.
    [0022]
    [0023] Regarding packaging of cellulose origin, there are solutions today but with some associated problems. Patent ES2144736 comments on a process for obtaining paper with greater elasticity which allows a certain thermoforming, although the range of elasticity that increases is limited. This paper can be laminated with a plastic film as shown in patent EP2586606, but as mentioned this type of material does not reach a high elasticity and packaging with a substantial depth is not achieved.
    [0024]
    [0025] Patent EP388201 refers to the generation of a corrugated board (microchannel) by means of thermoforming. The problem with this technology is that when creating a tray-type container, wrinkles or creases are created in the corners and in the rim of the tray, so that a completely sealed seal is not obtained.
    [0026]
    [0027] Patent WO9967143 refers to the generation of a tray-type package with cellulosic material by joining two pieces. In terms of manufacture, this solution does not allow an adequate use of material, since the starting sheets with which each of the pieces is generated, need to be die-cut with flanges or protrusions both external and internal to its flange once formed the container. In addition, this makes it impossible for said containers in a single step, since it is necessary to fold the tabs or thermoform the sheets in two directions (top and bottom) assuming a delay and with it an extra cost in the manufacturing line.
    [0028]
    [0029] Patent EP2441697 presents a barqueta type container that is generated in two stages of manufacture: one to form the container and another stage where the plastic film is thermoformed on the container, this film will allow the container to heat-seal. The problem that is found in this type of design is that it is also done in two stages of manufacture, this container also needs a coating film for its final assembly because it is the film that performs the function of joining between the tabs of cellulose sheet. Another problem associated with this solution is that the surface on which the heat sealing is carried out is not continuous, being able to generate sealing problems such as the known "chimneys", ie a direct path between the interior and exterior of the container, causing a micro-tunnel between the outer and inner atmosphere of the container.
    [0030]
    [0031] DESCRIPTION OF THE INVENTION
    [0032]
    [0033] The present invention proposes a solution to the above problems by a complex of consecutively stacked flat sheets according to claim 1, a method for obtaining a complex according to claim 15, a method for manufacturing a package according to claim 17, as well as a method for packaging at least one object according to claim 18. Preferred embodiments of the invention are defined in the dependent claims.
    [0034]
    [0035] A first inventive aspect provides a complex of consecutively stacked flat sheets, the complex being configured to form a package in a single execution, preferably to contain food products, wherein said complex comprises:
    [0036]
    [0037] ■ at least one first die-cut flat sheet, configured to be folded, comprising a first continuous flange delimited by an external contour and an internal contour, wherein said internal contour comprises a first portion and the external contour comprises a second portion, said first and second portions being corresponding portion;
    [0038]
    [0039] or wherein said at least one first sheet further comprises at least one first main flange extending along the first portion of the internal contour in the opposite direction to the second portion of the contour external, the first main flange being configured to form a wall of the container; Y
    [0040] ■ an assembly comprising at least one additional flat sheet, wherein the perimeter of the at least one additional flat sheet is delimited by the first flange of the first flat sheet.
    [0041]
    [0042] Throughout this document, it will be understood that sheet can be any element substantially flat, or in the form of plate or plate, where one of its dimensions, as its thickness, is much smaller than any of its other two dimensions, i.e. the width and the length.
    [0043]
    [0044] Furthermore, "punched" sheet means a sheet having cuts, slits or holes that form predefined patterns. Normally said drawings are produced by stamping a press or die that reproduces the predefined pattern by stamping it on a matrix supporting said sheet.
    [0045]
    [0046] Advantageously, the arrangement of the own punches in each of the sheets, allows the folding of the tabs of each of the sheets to fold or fold (meaning both equivalent terms) as appropriate, by a single movement of folding or folding.
    [0047] In addition, this allows the flange of the finally shaped container to be formed by superimposing the flanges of all the sheets; being therefore continuous, smooth and flat being perfectly defined along the contour of the container. In this way, it is achieved that the flange acts as a reliable joining point for the incorporation of internal coatings (such as "liners") or external coatings (such as cover films) so that delamination does not occur, a welding failure or, so that the known defect in the creation of "chimneys" does not appear in the heat sealing of a container with the external covering or cover film.
    [0048]
    [0049] In addition, advantageously, the sheets are flat before being folded, which allows an impression of drawings of higher quality since the printing occurs flat. In the event that the sheets comprise collapsible or collapsible tabs, subsequent stretching or wrinkling will not occur, as would occur in the thermoforming process; but in this process the printed drawing will be maintained in its entirety.
    [0050]
    [0051] On the other hand, throughout this document, it will be understood that said internal contour comprising a first corresponding portion with a second portion of the external contour, to which both portions are the closest segments of both contours; There can be as many as the first main tabs, including the first sheet. Thus, when it is said that the first main flange extends along the first portion of the internal contour in the opposite direction to the second portion of the external contour; it is understood that the main flange extends towards the central part of the sheet from the internal contour of the first flange.
    [0052]
    [0053] Furthermore, if the perimeter of the at least one additional flat sheet is delimited by the first flange of the first flat sheet, it will be understood that if both sheets are stacked by matching their contours, the outer contour or perimeter of the additional flat sheet is it would keep within the limits of the internal and external contours of the first flat sheet. In this way, the external contour or perimeter of the additional flat sheet can become equal to the internal contour, or equal to the external contour of the first flange, or be placed between them. In the same way, said perimeter can vary the proximity to one or another contour of the first flange along the same.
    [0054]
    [0055] Advantageously, this allows a continuous joining zone between both sheets, allowing no discontinuities or joints in the rim of the container so that a more durable bond between said sheets would be propitiated. If said perimeter of the additional flat sheet is equal to the external contour of the first flange, this allows a more reliable and durable bond between both sheets.
    [0056]
    [0057] As the flanges are disposed internally to the flange, the waste of cutting material will be reduced when the sheets are obtained from a coil or general sheet. This is due to the fact that from the same coil or general sheet, many equal sheets can be generated and very closely joined together, without leaving spaces that are not used in the generation of sheets. In particular, a greater number of sheets can be removed with less waste of material.
    [0058]
    [0059] In one embodiment, the assembly comprises at least one second die cut flat sheet, configured to be folded, comprising a second flange whose outer contour delimits its perimeter, wherein said at least one second sheet further comprises:
    [0060] ■ at least one second main flange configured to form a base of the container.
    [0061] In this embodiment it is understood that the complex is formed by at least one first die-cut flat sheet and the assembly, where the assembly is formed by at least one second die-cut flat sheet.
    [0062]
    [0063] As can be seen, the flat sheets are stamped folded or folded in their eyelashes, and not thermoformed. In this way, the sheets would not be subjected to a stretching of the material, which advantageously means that materials with little stretch capacity can be used for shaping the container.
    [0064]
    [0065] In one embodiment, the at least one first die cut flat sheet further comprises at least one first auxiliary flange connected to the first main flange and configured to form part of the base of the container.
    [0066]
    [0067] In one embodiment, the at least one second die cut flat sheet further comprises at least one second auxiliary flange located between the second main flange and the second flange. Preferably, said at least auxiliary flange is configured to rest on the at least one first main flange.
    [0068]
    [0069] In one embodiment, at least one second auxiliary flange of the at least one second sheet comprises a breakable connection with the internal contour of the second flange.
    [0070]
    [0071] Advantageously, this allows the finally shaped container to be substantially a rectangular prism, the side faces being substantially perpendicular to the base of the container. This additionally allows a greater use of the interior space of the container.
    [0072]
    [0073] This is because if the at least one second auxiliary flange is attached to the second main flange and the second flange, it must have a length corresponding to the length of the at least one first flange when it is folded; thus causing the internal contour of the base to be substantially smaller than the internal contour of the container rim, the side walls of the container being thus inclined. This feature that the side walls of the container are tilted allows the containers to be stackable; as well as facilitate their extraction from the mold after its formation.
    [0074]
    [0075] In one embodiment, the assembly comprises at least one flat sheet of thermoplastic material configured to form the container liner. The flat sheet of material Thermoplastic will behave as an internal coating of the container, once it has been shaped, therefore the term "liner" or internal waterproofing coating will be considered equivalent throughout this document.
    [0076]
    [0077] In this embodiment it is understood that the complex is formed by a first flat die-cut sheet and the assembly, where the assembly is formed by at least one flat sheet of thermoplastic material.
    [0078]
    [0079] The use of an internal liner or "liner" allows closure by heat sealing with a lid and / or seal or seal the interior of the container, thus covering the possible spaces between the main tabs that are not overlapped by the auxiliary tabs. This would prevent leakage of liquids or gases contained through the walls of the container. Additionally, this allows that in the case in which the sheets are made of hygroscopic material, these are not deteriorated by leakage of liquids originating from the object contained in the shaped container.
    [0080]
    [0081] In one embodiment, the assembly comprises at least one third flat sheet die cut, configured to fold, comprising a third flange with corners in its internal contour, preferably the internal contour comprising chamfered corners, where its external contour delimits its perimeter,
    [0082]
    [0083] ■ wherein said at least one third sheet further comprises at least one third main flange substantially diagonal to one of the corners of the internal contour and connected to the third flange by a first end, said main flange being configured to conform to at least one chamfered corner of the second flange. container.
    [0084]
    [0085] This will be understood as equivalent to the assembly comprising at least a third flat sheet die cut, configured to be folded, comprising a third continuous flange delimited by an external contour and an internal contour, wherein said internal contour comprises a first portion, or first end, and the external contour comprises a second portion, said first and second portion of the third lip being corresponding;
    [0086]
    [0087] ■ wherein said at least one third sheet further comprises at least one third main flange extending along the first portion of the inner contour in the opposite direction to the second portion of the external contour, the third main flange being configured to form a container wall .
    [0088] In one embodiment, at least one third main flange further comprises at least one third auxiliary flange located at a second end of the at least one third main flange, the third auxiliary flange being configured to rest on the at least one first main flange and / or in the at least the second main tab.
    [0089]
    [0090] In this way, the laminae of the complex are configured so that the main flanges conform to posteríorí the structural surfaces of the container once formed; in particular, the first main tabs would form the side faces of the container, the second (s) main tab (s) would form the base of the container, and the third main tabs would form the corners of the container, where said corners they could be chamfered or not.
    [0091]
    [0092] On the other hand, the laminae of the complex are configured so that the auxiliary flanges serve as a union with the adjacent main and / or auxiliary flanges of other sheets, depending on which is their immediately anterior or posterior lamina in the subsequent sequencing sequence arranged to conform the container.
    [0093]
    [0094] Additionally, when overlapping different sheets of the complex where each one forms a main face of the container, eg the base, side faces or chamfered corners, this allows the depth of the container once formed, being measured perpendicularly to the plane that forms the base of the container, is substantially greater than those achieved by conventional manufacturing methods.
    [0095]
    [0096] In one embodiment, the assembly further comprises a flat sheet configured to form a cover so as to cover an object contained in the container. It will be understood that this flat sheet is an outer coating or a "cover film." Preferably said flat sheet is made of thermoplastic material.
    [0097]
    [0098] Preferably, this external covering or lid is configured to be uncovered upon separating from the container, once it has been formed, and in this way allowing the user to access the interior of said container. In addition, by incorporating the container in its conformation said cover film, this allows to provide tightness inside the container. Advantageously, since the connection between the film and the container only along the rim of said container, this allows to take advantage of the entire interior space of the container.
    [0099] In one embodiment, the complex further comprises joining means located on the at least one first flat sheet and / or at least one flat sheet of the assembly.
    [0100]
    [0101] Regarding the fact that the complex also comprises joining means in at least a part of the surfaces that will be in contact after the conformation of the container; in particular between the first sheet and an additional flat sheet of the assembly; it is understood that at least one of the main and / or auxiliary tabs of the at least one first sheet, the at least one second sheet and / or the at least one third sheet comprise said joining means on the face that will face the main flange correspondent. In addition, said joining means are placed on the faces of the perimeter flanges in contact with each other.
    [0102]
    [0103] In one embodiment, the joining means is a hot-melt adhesive, preferably a thermoplastic adhesive.
    [0104]
    [0105] Advantageously, both during the shaping step and in a previous step thereto, this hot melt adhesive is heated allowing its uniform distribution over the auxiliary tabs. Thus, with a local application in the center of said flanges, it is achieved in the forming step that the glue is distributed over an area and can be similar to the surface of the auxiliary flange.
    [0106]
    [0107] In one embodiment, the attachment means located on the first flat sheet or the at least one flat cover sheet is a strong adhesive, the adhesive being located only on the first flange of the first sheet or adjacent the perimeter of the flat cover sheet , respectively.
    [0108]
    [0109] Conveniently, the adhesion force between the "liner" and the material of the first sheet is greater than the separation force between the "liner" and the cover film heat sealed on it.
    [0110]
    [0111] In one embodiment, at least one of the at least one first die cut flat sheet, the at least one second die cut flat sheet, and / or the at least one third die cut flat sheet are made of cellulosic material, such as paper, pressed cardboard, and corrugated cardboard.
    [0112]
    [0113] Advantageously, the cellulosic materials allow to be easily recyclable, which can be have different shapes and dimensions; besides being the raw material obtained from renewable sources.
    [0114]
    [0115] In other words, a complex of consecutively stacked flat sheets is provided, configured to form a container for containing objects, wherein said package comprises a flange with a continuous and flat polygonal outline, at least one base and a set of side faces corresponding to the sides of the contour. The complex comprises, in a general way, in its broadest configuration:
    [0116]
    [0117] ■ at least one first punched sheet, configured to be folded, comprising a first flange forming part of the flange of the container, wherein said at least one first sheet further comprises:
    [0118] • at least one first main flange substantially parallel to one of the sides of the contour and connected to the first flange at one end, thereby forming one of the side faces of the container in its folding, and
    [0119] • at least one first auxiliary flange located at the opposite end of the first main flange and extending along said main flange, configured to form part of the base of the container in its folding;
    [0120]
    [0121] ■ an assembly comprising at least one additional flat sheet, wherein the perimeter of the additional flat sheets is delimited by the first edge of the first flat sheet, the assembly comprising:
    [0122] • at least one second punched sheet, located on the first sheet die and being configured to fold, comprising a second flange forming part of the rim of the container, with a dimension equal to or less than the outer contour of the final container, where said at least one second blade further comprises:
    [0123] ■ at least a second main flange, forming part of the base of the container in its folding, and
    [0124] ■ at least one second auxiliary flange located between the second main flange and the second flange, and configured to rest on the at least one first auxiliary and / or main flange when folded;
    [0125] • at least one third punched sheet, located on the second punched sheet and being configured to fold, comprising a third flange forming part of the flange of the container, wherein said at least one third sheet further comprises:
    [0126] ■ at least one third main flange substantially diagonal to one of the corners of the polygonal contour and connected to the third flange at one end, forming at least one chamfered corner of the container in its folding, and
    [0127] ■ at least one third auxiliary flange located at another end of the at least one third main flange, being configured to rest on the at least one auxiliary and / or main first flange and / or on the at least second auxiliary and / or main flange in its folding;
    [0128] • at least one flat sheet of thermoplastic material configured to form the container liner;
    [0129] • at least one flat sheet configured to form the cover film; wherein the package further comprises joining means on at least a portion of the surfaces in contact between the first and second sheets, between the second and third sheets and / or between the first and third sheets.
    [0130]
    [0131] In a second inventive aspect, the invention provides a method for obtaining a complex of consecutively stacked flat sheets, a complex configured to form a package in a single execution, wherein the method comprises the steps of:
    [0132]
    [0133] a) providing at least one first die-cut flat sheet, configured to be folded, comprising a first flange delimited by an internal contour and an external contour;
    [0134] b) providing an assembly comprising at least one additional flat sheet, whose perimeter is delimited by the first flange of the first flat sheet;
    [0135]
    [0136] In one embodiment, the method according to the second inventive aspect, wherein the method further comprises the steps of:
    [0137]
    [0138] c) providing joining means;
    [0139] d) locating the joining means on at least the first flange of the first flat sheet and positioning at least one additional sheet on the first flat sheet making its perimeter coincide between the internal and external contours of the first flat sheet;
    [0140]
    [0141] When it is said to place or place joining means on at least one tab of the sheets, it is understood that it is placed on one or both of its faces, preferably being placed on the face facing the adjacent main flange of its sheet. immediately before or after in the stacking sequence to form the complex.
    [0142] If the complex can be obtained from a coil or from a general starting sheet, in this case there will be a general sheet or coil to produce at least one first flat sheet, and at least one other general sheet or coil to produce at least one additional flat sheet of the set, wherein the method of the second inventive aspect comprises the steps of:
    [0143]
    [0144] a) providing at least one general sheet comprising at least one first die-cut flat sheet, configured to be folded, the first flat die-cut sheet comprising a first flange delimited by an internal contour and an external contour;
    [0145] b) providing at least one other general sheet comprising at least one additional flat sheet whose perimeter is bounded by the first flange of the first flat sheet;
    [0146] c) provide joining means, if necessary;
    [0147] d) locating the joining means on at least the first flange of the first planar general sheet and positioning at least one additional general sheet on the first planar general sheet by matching its perimeter between the internal and external contours of the first planar general sheet;
    [0148]
    [0149] In this embodiment of obtaining the complex from a coil or from a general starting sheet, it is understood that said starting sheets are configured to be able to extract each of the at least one first sheet and the at least one additional flat sheet. In this way, the general starting sheets or coils can be arranged according to the stacking sequence in order to be extracted in the same step all at once, maintaining the order between them.
    [0150]
    [0151] In a third inventive aspect, the invention provides a method for the manufacture of a container for containing objects, preferably for containing food products, comprising the steps of:
    [0152]
    [0153] a) providing a complex of flat sheets according to the first inventive aspect or a complex obtained according to the second inventive aspect;
    [0154] b) providing a mold and a piston configured to embed flat sheets;
    [0155] c) positioning the first flange of the first flat sheet of the container on the mold, preferably the mold is configured to step on said first flange;
    [0156] d) introducing the piston acting on the center of at least one additional flat sheet of the assembly;
    [0157] e) stopping the introduction of the piston once a predefined height of the depth of said container has been achieved.
    [0158]
    [0159] If the complex is obtained from a series of general starting foil or coils, the method will comprise after stage e), punching out all the stacked general starting sheets that make up the container to be extracted in a single step. In this case, the mold steps out of the first flange.
    [0160]
    [0161] Throughout this document, mold will be understood as the element in which the sheets are positioned horizontally and which allows them to be stepped on and / or held motionless along the rim, thanks to some retainers. In addition, said mold comprises a central cavity that reproduces the final shape of the container for its shaping. In one embodiment, the central cavity of said mold is adaptable to reproduce different final shapes of the package and that can be used with different types of sheets. Preferably, said central cavity of the mold comprises orifices distributed to allow the exit of air accompanying the introduction of the piston.
    [0162]
    [0163] On the other hand, piston will be understood as an element that reproduces the complementary shape of the mold and that is configured to enter it vertically causing in its passage the folding of the tabs of all the sheets stacked in the mold. In one embodiment, the piston incorporates heating means, e.g. resistors, to cause the joining means to melt if they are adhesives distributed over the entire surface of the auxiliary flanges. In addition, these heating means incorporated in the piston allow the thermoforming of the internal liner or "liner".
    [0164]
    [0165] In one embodiment, the piston is formed by means for applying pressure on the external face of the third sheet, such as injectors for applying air under pressure to said face, as well as holes distributed in the central cavity of the mold that allow the air to escape from the inside of said central cavity. Additionally, said orifices are provided with suction means on the external face of the first sheet, to extract the air from inside said cavity. In this embodiment, it will be understood that introducing the piston acting on the center of the complex causing the folding of all the main and auxiliary flanges in its movement, is equivalent to the joint operation of applying compressed air on one side and letting the air out, or suck it, on the opposite side of the container; the predefined height of the depth of said container being reproduced by the mold, in this case.
    [0166] In addition, this embodiment would comprise heating means, e.g. resistors, to cause the hot melt glue to melt and distribute on the surface of the auxiliary flanges, in addition to which they would be configured to cause the thermoforming of the inner liner or liner, if applicable.
    [0167]
    [0168] In one embodiment, the method of the third inventive aspect further comprises, after step a), a step of heating the complex provided in said step a). In this way, current industrial equipment that does not incorporate heating means in the piston could be used.
    [0169]
    [0170] Advantageously, this second inventive aspect allows the packaging to be formed in a single step, which is in accordance with the vertical movement of the piston. Therefore, it does not need to fold the tabs, some upwards and others down, as appropriate, prior to the superposition and joining of the sheets.
    [0171]
    [0172] In other words, a method for manufacturing a container from a complex is provided, wherein the complex generally comprises, in its broadest configuration, the steps of:
    [0173]
    [0174] a) providing a complex comprising at least one first punched sheet, and a set comprising at least a second punched sheet and a third punched sheet, wherein all the punched sheets comprise the same flange;
    [0175] b) provide joining means, if necessary;
    [0176] c) placing joining means on the at least one first auxiliary flange of the first sheet;
    [0177] d) placing joining means on the at least one second auxiliary flange of the second sheet and positioning said at least one second sheet on the first sheet by matching the flanges of both;
    [0178] e) in the event that there is more than one second sheet, place joining means on the following at least one second auxiliary flange of the sheet and position the next second sheet on the previous sheet by matching the flanges of both;
    [0179] f) placing joining means on the at least one third auxiliary flange of the third sheet and positioning the third sheet on the last second sheet positioned by matching the flanges of both;
    [0180] g) providing a mold and a piston configured to stuff the sheets by folding them; h) positioning the rim of the container on the mold configured to step on it,
    [0181] i) introducing the piston acting on the center of the third sheet causing the folding of all the main and auxiliary tabs in its movement;
    [0182] j) stopping the introduction of the piston until all the main flanges are folded forming the base, the lateral faces and the chamfered corners of the container according to a predefined height of the depth of said container.
    [0183]
    [0184] In one embodiment, the at least one first sheet is hingedly joined by its outer contour to the perimeter of at least one additional flat sheet of the assembly. In other words, both the at least one first sheet and the at least one additional sheet of the assembly are made in a continuous sheet, being joined in their contour consecutively by articulated joints. This allows them to be folded at their joints (diptych, triptych, etc.) to form the complex of consecutively stacked sheets that will generate the package.
    [0185]
    [0186] In one embodiment, the manufactured package may comprise the inner liner or "liner" on the outer surface Additionally, the package may comprise an internal coating on the inside of the package and another coating or "liner" on its outer surface, thus producing a sandwich type structure with the other intermediate stamped flat sheets. Preferably, in this embodiment with the liner located on the outer surface, said flat sheet of thermoplastic material will be thicker.
    [0187]
    [0188] In a fourth inventive aspect, the invention provides a method for packaging at least one object, preferably food products, comprising the steps of:
    [0189]
    [0190] i. provide a package manufactured according to the third inventive aspect;
    [0191] ii. introduce at least one object inside the package;
    [0192] iii. positioning on it a lid film comprising a perimeter delimited by the first rim of the first flat sheet; Y
    [0193] iv. joining along the first flange of the first flat sheet causing the joining of at least one additional flat sheet of the assembly with the cover, the inside of said sealed container remaining.
    [0194]
    [0195] In one embodiment, the joining of at least one additional flat sheet of the assembly with the cover along the first flange of the first flat sheet is produced by heat sealing. Preferably said lid is made of thermoplastic material.
    [0196] It is understood that heat sealing produces a heat-sealed joint along the flange. The first sheet can comprise a film or coating that allows its heat sealing in the case that thermoplastic materials are not those that undergo said heat sealing.
    [0197]
    [0198] In one embodiment, the attachment of at least one additional flat sheet of the assembly with the cover along the first flange of the first flat sheet is produced by an adhesive seal.
    [0199]
    [0200] Advantageously, this allows the interior of the container to be completely hermetic as a synergistic combination between the overlapping of the flanges of the sheets of the container, together with the lid film heat sealed to the flange thereof.
    [0201]
    [0202] Advantageously, the connection only along the rim of the container would be designed to withstand the conditions to which the container can be exposed during its useful life until the user wants to access the interior of the container to manipulate the contained object. In addition, this technique is economical and easy to implement in the production line.
    [0203]
    [0204] In one embodiment, in the method according to the fourth inventive aspect, a determined atmosphere or a vacuum is applied after stage ii), achieving packaging in a modified atmosphere, or a vacuum inside the container, and preventing its leakage or loss by sealing after stage iv).
    [0205]
    [0206] Throughout this document, packaging in modified atmosphere will be understood as the introduction of a gas or a series of suitable and predefined gases, mainly a mixture of pure oxygen, carbon dioxide and nitrogen in a high or permeable barrier container; where the gas mixture meets the specific needs of each packaged item.
    [0207]
    [0208] Advantageously, packing in protective atmosphere allows packaged objects, e.g. Fresh food products with minimal previous processing, maintain an original appearance, taste and texture. In addition, this packaging allows a more prolonged storage of packaged goods, without the need to add chemical preservatives or stabilizers.
    [0209]
    [0210] On the other hand, it will be understood that the vacuum packaging achieved in the fourth aspect Inventive can also be a skin, being understood as such a vacuum that later requires a heating of the cover film so that it adopts the shape of the contained object and is close to it.
    [0211]
    [0212] All features and / or method steps described herein (including claims, description and figures) may be combined in any combination, except combinations of such mutually exclusive features.
    [0213]
    [0214] DESCRIPTION OF THE FIGURES
    [0215]
    [0216] These and other features and advantages of the invention will be more clearly apparent from the detailed description that follows of a preferred embodiment, given solely by way of illustrative and non-limiting example, with reference to the accompanying figures. .
    [0217]
    [0218] Figure 1a This figure illustrates schematically a complex of flat sheets formed by the stacking of a first die cut flat sheet and an additional flat sheet, in this case being a second flat sheet die cut. Figure 1b This figure schematically illustrates a complex formed by the stacking of a first die cut flat sheet and an additional flat sheet, in this case being a thermoplastic flat sheet.
    [0219] Figure 1c This figure schematically illustrates a complex of flat sheets from a plan view
    [0220] Figure 2a This figure schematically illustrates the package manufactured from the complex of Fig. 1a
    [0221] Figure 2b This figure schematically illustrates the package manufactured from the complex of Fig. 1c
    [0222] Figure 2c This figure schematically illustrates the package manufactured from the complex of Fig. 1c, wherein the first sheet further comprises auxiliary flanges. Figure 3 This figure illustrates a complex formed by the superposition or stacking of a first, second and third sheets pre-punched to be folded.
    [0223] Figure 4 This figure illustrates the superposition of a first, second and third sheets punched and shaped into their final form.
    [0224] Figure 5a This figure shows a top perspective view of the final arrangement of the already formed sheets shown in Figure 4 and superimposed on the order that would be in the corresponding final container.
    [0225] Figure 5b This figure shows a bottom perspective view of the final arrangement of the sheets formed in figure 4.
    [0226] Figure 6 This figure shows the container comprising the "liner" or internal waterproof coating.
    [0227] Figure 7a This figure shows the package comprising the cover film or external coating.
    [0228] Figure 7b This figure shows the container of figure 7a where the lid film is uncovered upon partially separating from the container.
    [0229] Figure 8a This figure shows schematically the tool comprising the mold with a central cavity and the piston.
    [0230] Figure 8b This figure shows schematically the tool of figure 8a where the piston is formed by means for applying pressure and suction means.
    [0231] Figure 9a This figure shows a particular embodiment of the package with a polygonal contour of 10 sides.
    [0232] Figure 9b This figure shows a particular embodiment of the package comprising a plurality of first and / or second sheets.
    [0233] Figure 10 This figure shows an object packed in a protective atmosphere.
    [0234] Figure 11 This figure shows a complex formed by sheets joined by articulated joints.
    [0235] Figure 12 This figure shows a complex formed by flat sheets and a cover film joined by articulated joints.
    [0236]
    [0237] DETAILED EXHIBITION OF THE INVENTION
    [0238]
    [0239] Complex ( 100 ) of flat sheets consecutively stacked.
    [0240]
    [0241] Figure 1a shows a complex (100) formed by a first flat sheet (10) punched out and a set (60) comprising at least one additional flat sheet. In this embodiment, said at least one additional flat sheet is a second sheet (20) punched out.
    [0242]
    [0243] In particular, in Fig. 1a there is observed a first flat sheet (10) punched out comprising a first flange (10.1), where said flange is continuous, ie it is formed by a single element; being delimited by an external contour (10.1.1) and an internal contour (10.1.2). Said internal contour (10.1.2) also comprises a first portion (10.1.2.1) corresponding to a second portion (10.1.1.1) of the external contour (10.1.1).
    [0244]
    [0245] By corresponding it will be understood throughout this document that both portions (10.1.2.1, 10.1.1.1) are the closest segments of both contours (10.1.1, 10.1.2); there can be as many as the first main tabs (10.2), including the first sheet (10). Specifically, in this embodiment of figure 1a there are shown 4 first corresponding portions (10.1.2.1) with 4 second portions (10.1.1.1), respectively, on the 4 sides of the first flange (10.1). Furthermore, it can be seen that the first portion (10.1.2.1) comprises two ends identified with points A and B, where said first portion (10.1.2.1) belonging to the internal contour (10.1.2) is a segment shorter than the segment of the second portion (10.1.1.1) belonging to the external contour (10.1.1).
    [0246]
    [0247] In addition, the first sheet (10) shown in Fig. 1a further comprises four first main tabs (10.2). Said tabs extending along the first portions (10.1.2.1) of the internal contour (10.1.2) in the opposite direction to the second portion (10.1.1.1) of the external contour (10.1.1). Where said first main tabs (10.2) would each form a wall (1.3) of the container (1) once formed ( see fig.
    [0248] 2a for more detail).
    [0249]
    [0250] On the other hand, attending to the second flat sheet (20) punched out of the assembly (60) comprising at least one additional flat sheet; this would comprise a second flange (20.1) whose external contour (20.1.1) delimits its perimeter. Said at least one second sheet (20) further comprises at least a second main flange (20.2) configured to form a base (1.2) of the container (1) after being formed in the single execution of the manufacturing process of said container (1) ( See Fig. 2a for more details).
    [0251]
    [0252] For more detail of the components of the first flat sheet (10) die-cut and second sheet (20) die-cut, see Fig. 3 and its description.
    [0253]
    [0254] Figure 1b shows a complex (100) formed by a first flat sheet (10) punched out and a set (60) comprising at least one additional flat sheet. In this embodiment, said at least one additional flat sheet is a flat sheet of thermoplastic material (40) configured to form the liner of the container (1).
    [0255]
    [0256] In this embodiment, the first flat sheet (10) is composed of a first continuous and flat flange (10.1) that would comprise an external contour (10.1.1) and an internal contour (10.1.2), said contours comprising a first portion (10.1.2.1) and a second portion (10.1.1.1), respectively. Furthermore, it is noted that said first sheet further comprises four first main tabs (10.2) as defined for Fig. 1a.
    [0257]
    [0258] On the other hand, the flat sheet of thermoplastic material (40) of the assembly (60) comprises a perimeter (40.1) which is delimited by the first flange (10.1) of the first flat sheet (10) ( see Fig. 1c for more detail). To join the flat sheet of thermoplastic material (40) to any of the other sheets, as for example in this case the first sheet (10), a joining means (3) is used ( see Fig. 3 for more detail) located:
    [0259]
    [0260] - only on the first flange (10.1) of the first flat sheet (10), or
    [0261] - adjacent to the perimeter (40.1) of the flat sheet of thermoplastic material (40).
    [0262]
    [0263] In this embodiment, it will be understood that in manufacturing the package (1) ( see Fig. 2b for more detail) in a single execution, this sheet (40) undergoes a thermoforming upon contact with the hot piston that exerts pressure and temperature to the sheet. Failing this, if the piston does not incorporate heating means, the complex would have been previously heated before coming into contact with it.
    [0264]
    [0265] In addition, the perimeter of the sheet can be larger than the external contour of the flange during the manufacturing stage of the package, and in a subsequent process it experiences a cut-out or reduction of its protruding perimeter.
    [0266]
    [0267] Fig. 1c shows a complex of flat sheets seen from a plan view or higher with respect to their stacking. In this Fig. 1c the characteristic can be appreciated that the perimeter of any of the additional flat sheets comprising the assembly (60) which is delimited by the first flange (10.1) of the first flat sheet (10). As already mentioned, the perimeter of the additional flat sheet may become coincident with the internal contour or with the external contour of the first flange, or may vary along the same.
    [0268]
    [0269] For illustrative purposes, the first flat sheet (10) die cut and the flat sheet of thermoplastic material (40) shown in Fig. 1b are shown, since both comprise a smaller number of elements and allow better visualization. However, the relationship between the perimeter (40.1) of the flat sheet of thermoplastic material (40), and the first flange (10.1) of the first flat sheet (10) would equally apply to whatever the at least one additional flat sheet of the assembly (60) .
    [0270]
    [0271] In this embodiment, the perimeter contour (40.1) of the flat sheet of thermoplastic material (40) is shown in dotted line, and it can be seen that it is comprised at all times within the upper and lower limits of the first flange ( 10.1), which would be identified with the internal contour (10.1.2) and the external contour (10.1.1) of the first flange (10.1), respectively.
    [0272]
    [0273] Package ( 1) manufactured from the complex ( 100).
    [0274]
    [0275] Fig. 2a schematically shows the package manufactured from the complex (100) of Fig. 1a. In particular, said container would be formed from the complex comprising a first sheet (10) punched out and a second sheet (20) punched out.
    [0276]
    [0277] In this case, the rim (1.1) of the container (1) is formed by the union of the first flange (10.1) of the first sheet (10) and the second flange of the second sheet (20). As seen, the first main tabs (10.2) would be attached to the second auxiliary tabs (20.3) by joining means (3) (not shown); while the second main flange (20.2) joins the first auxiliary flanges (10.3) by joining means (3) (not shown). As can be seen, in this configuration there could be non-overlapping recesses, which would be ideal for containers that require a suitable aesthetic to present the objects; or for objects that require frequent ventilation.
    [0278]
    [0279] On the other hand, Fig. 2b schematically shows the package manufactured from the complex (100) of Fig. 1b or that of Fig. 1c. In this example, the package would be formed from the complex comprising a first sheet (10) die cut and a flat sheet of thermoplastic material (40).
    [0280]
    [0281] As can be seen, Fig. 2c is the same embodiment as that shown in Fig. 2b, but where the first sheet (10) also comprises auxiliary flanges (10.3).
    [0282]
    [0283] In the embodiments of Figs. 2b and 2c, it is observed that the perimeter contour (40.1) of the flat sheet of thermoplastic material (40) is included at all times within the limits marked by the internal contour (10.1.2) and the external contour (10.1.1) of the first flange (10.1). In addition, because the flat sheet of thermoplastic material (40) would act as an internal waterproofing coating, this would be totally continuous, showing the elements that would be hidden in broken lines.
    [0284]
    [0285] The inner liner or liner would be attached to the first sheet (10) only by the first flange (10.1) by a strong adhesive (not shown).
    [0286]
    [0287] Detail of the sheets ( 10, 20, 30) that make up the complex ( 100) and its stacking.
    [0288]
    [0289] Figure 3 shows an exploded view of a complex formed by a first flat sheet (10) punched out and an assembly (60) comprising at least one additional flat sheet, where said assembly would be formed by a second flat sheet (20) die-cut and a third flat sheet (30) punched.
    [0290]
    [0291] In this figure, it can also be seen how the first (10), second (20) and third (30) punched sheets would be positioned to form the complex (100), before their flanges are folded or folded to form the container.
    [0292]
    [0293] The sequence of stacking shown in this figure corresponds to the first stamped sheet (10) being positioned first resting on some surface, and then placed on this first sheet (10) at least a second stamped sheet (20), and finally a third laminated sheet (30) is placed on this second sheet (20). During this sequence of stacking of the sheets, the contours of all the sheets are matched to facilitate the subsequent forming of the container (1).
    [0294]
    [0295] In particular, the first sheet (10) shown in Fig. 3 comprises a first flange (10.1) equal to the rim of the container (1.1), a plurality of first main flanges (10.2) to form the side faces of the container (1.3) , and a plurality of first auxiliary tabs (10.3). In addition, said first sheet (10) comprises a set of first holes or slits (10.6), and a set of first cuts or incisions (10.7) that facilitate the folding of the first tabs both main (10.2) and auxiliary (10.3). Both the distribution and shape and number of said first holes (10.6) and cuts (10.7) form the predefined drawing of the blank of the first sheet (10).
    [0296]
    [0297] Additionally, the first sheet (10) comprises a plurality of first lines folding main (10.4) configured to act as bending axes to fold the first major tabs (10.2); and further comprises a plurality of first auxiliary folding lines (10.5) configured to act as bending axes for folding the first auxiliary flanges (10.3).
    [0298]
    [0299] In this embodiment, it is understood that a first portion (10.1.2.1) of the internal contour (10.1.2) corresponds to a first main folding line (10.4); while an opposite end (10.2.1) of the first main flange (10.2) corresponds to a first auxiliary folding line (10.5). The same occurs also in Figs. 1a-1c.
    [0300]
    [0301] On the other hand, the second sheet (20) shown in Fig. 3 comprises a second flange (20.1) equal to the rim of the container (1.1), at least a second main flange (20.2) to form the base of the container (1.2) , and a plurality of second auxiliary tabs (20.3). Preferably, the at least one first main flange (20.2) is only a first main flange (20.2). In addition, said second sheet (20) comprises a set of second holes or slits (20.6), and a set of second cuts or incisions (not shown in these embodiments) that facilitate the folding of the second tabs both main (20.2) and auxiliary (20.3). In this way, both the distribution and shape and number of said second holes (20.6) and cuts form the predefined drawing of the blank of the second sheet (20).
    [0302]
    [0303] Preferably, the second auxiliary flange (20.3) comprises a breakable connection with the internal contour (20.1.2) of the second flange (20.1).
    [0304]
    [0305] In addition, the second sheet (20) comprises a plurality of second major folding lines (20.4) which act as bending axes to fold the second main flange (20.2) relative to the second auxiliary flange (20.3); and further comprises a plurality of second auxiliary folding lines (20.5) which act as bending axes to fold the set of the second auxiliary flanges (20.3) together with the second main flange (20.2). It is seen that the plurality of second auxiliary folding lines (20.5) is in the internal contour (20.1.2) of the second flange (20.1). Additionally, the breakable joint is an auxiliary folding line (20.5). Preferably, said breakable joint comprises a series of cuts to weaken said joint.
    [0306]
    [0307] Similarly, the third sheet (30) shown in Figure 3 comprises a third flange (30.1) equal to the rim of the container (1.1), a plurality of third main flanges (30.2) to form the corners of the container (1.4), preferably bevelled, and a plurality of third auxiliary flanges (30.3). In addition, said third sheet (30) comprises a set of third holes (30.6), and a set of third cuts (30.7) that facilitate the folding of the third tabs both main (30.2) and auxiliary (30.3). Both the distribution and shape and number of said third holes (30.6) and cuts (30.7) form the predefined drawing of the blank of the first sheet (30).
    [0308]
    [0309] Additionally, the third sheet (30) comprises a plurality of third major folding lines (30.4) configured to act as bending axes to fold the third major flanges (30.2); and further comprises a plurality of third auxiliary folding lines (30.5) configured to act as bending axes to fold the third auxiliary flanges (30.2).
    [0310]
    [0311] In particular, in this embodiment, it is understood that a first portion (30.1.2.1) of the internal contour (30.1.2) corresponds to a third main folding line (30.4); while a second end (30.2.2) of the third main flange (30.2) corresponds to a third auxiliary folding line (30.5).
    [0312]
    [0313] Attending again to the third flat sheet (30) die cut, this comprises a first flange (30.1), where said flange is continuous and is delimited by an external contour (30.1.1) and an internal contour (30.1.2). Said internal contour (30.1.2) comprises corresponding chamfered corners. Said chamfered corners are first portions (30.1.2.1) each corresponding to a second portion (30.1.1.1) of the external contour (30.1.1). It can be said that corresponding will be understood as for the first sheet (10), but applying to the elements of the third sheet (30).
    [0314]
    [0315] Throughout this document, holes or slits (10.6, 20.6, 30.6) will be understood as absences of local material that are distributed in the space delimited by their respective flanges (10.1, 20.1, 30.1) and that facilitate the folding of the main tabs (10.2, 20.2, 30.2). On the other hand, the cuts or incisions (10.7, 30.7) entail that there is no absence of material with respect to the original, i.e. that the edges of the cut are adjacent.
    [0316]
    [0317] It should be noted that these figures do not indicate each and every one of the elements described above to facilitate the understanding of the numerical references. The same occurs in the other figures of the present application.
    [0318] Figure 4 shows an exploded view of how the first (10), second (20) and third (30) sheets are stamped to form the container, once all their main and auxiliary tabs have been folded in the final configuration . Said final configuration of the folding of the main and auxiliary tabs is what they would show separately when they form the already shaped container. As can be seen, all the main and auxiliary tabs have been folded using their respective main and auxiliary folding lines, accordingly.
    [0319]
    [0320] Figures 5a and 5b illustrate the final arrangement of the sheets (10, 20, 30) already folded, ie with all their tabs folded down in the final configuration, forming the package. In particular, figure 5a allows to observe a top view of the package (1) formed with the sheets already folded in the final configuration, once they have been stacked. On the other hand, figure 5b allows to observe said package (1) from a bottom view.
    [0321]
    [0322] In both figures, the spaces formed between the different tabs of the same sheet once folded in their final configuration are shown, and where in this particular case with the three folded sheets, said spaces are overlapped by different sheet tabs, producing a container compact. In a preferred embodiment, the auxiliary flanges are arranged to overlap the junction of two main flanges of different sheets at those locations and directions most likely to separate said two main flanges. This probability that they separate is due to the loads attributed to the weight of the object (2) that is contained, understanding that said object causes a point load that is distributed throughout the container transferring through the tabs between different sheets. The joining of an auxiliary flange of a sheet with a main flange of another sheet enables said transfer and distribution of loads.
    [0323]
    [0324] To hold together said auxiliary flange of a sheet with a main flange of another sheet, joining means (3) are used on the side of the auxiliary flanges that the corresponding main flange will face. In addition, said joining means (3) are placed on the faces of the perimeter flanges in contact with each other. Figure 3 shows some examples of where the joining means (3) can be applied on the different sheets; however, these examples are not limiting, the exact position can be varied, or there can be no joining means (3) on each and every one of the flanges, as well as on their respective flanges. Said joining means (3) are not shown in the following figures for illustrative purposes.
    [0325] Throughout the document, it is understood that the term face and surface referring to the main tabs and / or auxiliary tabs and / or contours will be considered equivalent.
    [0326]
    [0327] Preferably, said joining means is a hot melt adhesive, such as a thermoplastic adhesive. This adhesive is designed to work cut between the tabs; besides that it must have an adhesive force, i.e. between flange and adhesive, greater than cohesive force, i.e. between molecules of the adhesive itself. In this way, if the efforts exceed the cohesive maximum force at some point, the main and auxiliary tabs of different sheets will only detach; not causing cracks that could cause the container to break in its entirety.
    [0328]
    [0329] Internal ( 40) and external ( 50) coatings of the container ( 1)
    [0330]
    [0331] Figure 6 shows an embodiment of the package (1) further comprising an inner liner (40) or liner. This internal coating (40) is thermoformed in the conformation of the container from the flat sheet of thermoplastic material (40). In addition, the liner (40) is configured to waterproof the interior of the container (1). As can be seen in figure 6, said internal cover (40) completely covers the interior of the container (1) internally to the contour of the rim (1.1) of the container. Throughout this explanation, the terms internal coating and liner will be understood as equivalent.
    [0332]
    [0333] In the event that said inner lining (40) protrudes beyond the contour of the rim (1.1), the excess portion can be cut out or adapted to match its outline with said rim (1.1) of the container.
    [0334]
    [0335] Throughout the document, to differentiate the inner lining (40) of the lid (50), the liner (40) is shown dotted, while the lid (50) is shown grated.
    [0336]
    [0337] Figure 7a shows the package (1) also comprising an outer covering or cover film (50), both terms being understood as equivalent. Said cover film (50) is only joined along the rim of the container (1.1) stretched, without wrinkling or warping. In addition, it is possible to observe the heat-sealed connection (51) that holds the cover film together with the flange (1.1) of the container. Preferably, said heat-sealed connection (51) is made between the cover film (50) and the internal cover (40) along the rim (1.1) of the container, when both coatings are arranged on the container (1). This heat sealing of both coatings is facilitated due to the fact that the flange (1.1) formed from the flanges (10.1, 20.1, 30.1) of the sheets that make up the container (1), is completely flat.
    [0338]
    [0339] As in Fig. 6 in the event that said cover film (50) protrudes beyond the contour of the flange (1.1), the excess portion can be cut out or adapted to match its outline with said flange (1.1) of the container. It being understood that the perimeter (50.1) of the lid film (50) is cut until it is within the limits of said container rim (1.1), or what is equal within the limits of the first rim (10.1) of the first sheet (10).
    [0340]
    [0341] Figure 7b shows the package of figure 7a where the lid film (50) is uncovered as it partially separates from the package. This occurs because the heat-sealed connection (51) is progressively broken when pulling the cover film (50), this action corresponding to the usual way of "opening" the container to access the inside thereof and manipulate the object (2) contained . As can be seen, the inner lining (40) is held together with the container by the strong adhesive, while the delamination or uncovering, under normal conditions, of the cover film (50) occurs.
    [0342]
    [0343] Tool ( 6) comprising a mold ( 4) and a piston ( 5) for manufacturing the container ( 1)
    [0344]
    [0345] Fig. 8a shows schematically an embodiment of a tool (6) comprising a mold (4) and a piston (5). In said embodiment, the mold (4) comprises a central cavity (41) and retainers (42). Said retainers (42) are spaced according to the dimensions of the rim of the container (1.1), its function being to step on and / or hold said rim of the container (1.1) in a manner coinciding with the perimeter of the central cavity (41). ).
    [0346]
    [0347] On the other hand, Fig. 8a shows a piston (5) reproducing the final configuration of the container. Said piston (5) moves in vertical downward direction, as indicated by the arrow shown, causing the folding of both the main and auxiliary tabs of the different sheets in its passage, in addition to the thermoforming of the liner (40) (if applicable) until getting the final configuration of the container.
    [0348]
    [0349] The left figure shown in Fig. 8a, is a schematic representation of how the complex or stacking of sheets (10, 20, 30) is positioned on the mold, previously to be shaped the container (1). In the image on the right, the final situation is shown in which the piston has descended completely to a predefined height corresponding to the depth of the container; and the container (1) with the final configuration is comprised between the central cavity (41) that reproduces its external shape, and the piston (5) that reproduces the interior of said container (1). In addition, the piston (5) comprises holes (5.3) distributed in the central cavity of the mold that allow the air to leave the interior of said central cavity. As can be seen, the step of shaping the package from the assembly shown in the left image occurs in a single execution, ie in the sole action of stuffing the stacked sheets with the piston.
    [0350]
    [0351] In addition, the piston (5) can incorporate heating means to facilitate the dispersion of the joining means (3) when it is hot-melt glue, such as thermoplastic adhesives.
    [0352]
    [0353] Fig. 8b shows schematically a particular example of the tool (6) comprising a mold (4) and a piston (5). In said example, the mold (4) comprises a central cavity (41) and retainers (42). Said retainers (42) are positioned to step on and immobilize the flange of the container (1.1) coincident with the perimeter of the central cavity (41). In addition, said retainers (42) provide sealing to an upper cavity (5.1) of the piston (5) located above the mold and that incorporates injectors (5.2) to apply air under pressure on the outer face of the upper sheet of the stack, in this example being the inner liner or liner (40). In addition, the piston (5) comprises holes distributed in the central cavity of the mold that allow the air to escape from the interior of said central cavity. Preferably, said orifices comprise suction means (5.3), for extracting the air inside said cavity, which help the shaping process of the final configuration.
    [0354]
    [0355] The left figure shown in Figure 8b is a schematic representation of how the stacking of sheets (10, 20, 30) and internal coating (40) is positioned on the mold, prior to the packaging (1) being formed. In the image on the right, the final situation is shown in which both the injectors (5.2) and the suction means (5.3) of the piston have applied compressed air on one side and sucked on the opposite side of the container (1) ; leaving the container (1) with the final configuration in contact with the walls of the central cavity (41) that reproduces its external shape.
    [0356]
    [0357] In addition, heating means would be arranged to cause the thermoforming of the inner liner or liner (40).
    [0358]
    [0359] Concrete embodiments of the package ( 1)
    [0360]
    [0361] Figure 9a shows a particular embodiment of the package (1) comprising ten side faces (1.3). In this embodiment, the chamfered corners of the container (1.4) have been considered as lateral sides of the container (1.3). In this way, it is understood that said side faces (1.3) and bevelled corners (1.4) can be considered equivalent to carry out the invention.
    [0362]
    [0363] In this embodiment, it is contemplated:
    [0364]
    [0365] ■ at least one second sheet (20) forming the base of the container (1.2); Y
    [0366] ■ at least one other sheet, or first or third sheet (10, 30), forming one of the side faces (1.3) or chamfered corners (1.4), being understood as equivalents, being alternate of the container.
    [0367]
    [0368] So that the same sheet, or first (10) or third (30), does not conform:
    [0369]
    [0370] ■ a side face (1.3) and an adjacent chamfered corner (1.4); or
    [0371] ■ two side faces (1.3), or chamfered corners (1.4), adjacent and consecutive when they are considered equivalent;
    [0372] since its subsequent folding would be impossible. In the event that there are not both first (10.7) or third (30.7) cuts, and / or first (10.6) or third (30.6) holes, between main tabs of the same sheet (10, 30), this condition is applicable to any embodiment of the invention.
    [0373]
    [0374] Figure 9b shows a particular embodiment of the package (1) comprising four side faces (1.3). As for the embodiment shown in Figure 9a, the side faces of the package (1.3) are considered equivalent to the chamfered corners of the package (1.4); so that using first sheets (10) or third sheets (30) to form the side faces (1.3) or chamfered corners (1.4), respectively, is considered equivalent.
    [0375]
    [0376] In this embodiment, a plurality of first (10) and / or third (30) sheets are placed on the previous sheet in stacking sequence; matching the contours of its flanges (10.1, 30.1), to facilitate the subsequent forming of the container (1). In addition, each of the first (10) and / or third (30) sheets comprises a main tab (10.2) forming a side face of the container (1.3) in its folding, and an auxiliary flange (10.3).
    [0377]
    [0378] The last sheet to be stacked in the stacking sequence of this embodiment is the second sheet (20), which comprises a second main flange forming the base (1.2) of the container, and a plurality of second auxiliary flanges (20.3). In this way, it is understood that the stacking order of the sheets can be modified according to the specific design of the pattern presented by said punched sheets; being in this case equivalent this process of stacking to which has been exposed in the previous paragraphs.
    [0379]
    [0380] Object ( 2) packed in modified atmosphere
    [0381]
    [0382] Figure 10 shows an object (2), where said object can be packaged in a protective atmosphere, in a vacuum or in a normal atmosphere. The package (1) is formed from the complex of flat sheets consecutively stacked, in this case this comprising punched sheets comprising folding flanges; in addition to an internal coating (40) and an external coating (50) joined by a heat-sealed connection (51). In addition, the object (2) contained can be observed, preferably being a food product.
    [0383]
    [0384] Complex ( 100) formed by sheets joined by an articulated joint ( 7).
    [0385]
    [0386] Figure 11 shows the complex illustrated in Figure 3 where the first sheet (10) is hingedly connected by its external contour (10.1.1) to the perimeter of at least one additional flat sheet of the assembly (60). In this way, the sheets are stacked by bending them by the articulated joint. Said bending is represented schematically in figures 11 and 12 by means of the arrows drawn.
    [0387]
    [0388] In particular, the first sheet (10) would comprise a hinged joint (7) with the second sheet (20); while the second sheet (20) would comprise a hinged connection (7) with the third sheet (30), the articulated joints (7) being on two opposite sides of the external contour (20.1.1) of the second flange (20.1) of the second sheet (20). In other words, the sheets are obtained in the form of a triptych by hinged joints (7), allowing them to be flat when they are unfolded, and which are stacked when their hinged joints (7) are bent.
    [0389] Figure 12 shows the complex illustrated in Figure 11, further comprising a cover (50). In particular, the first sheet (10) is hingedly connected by its external contour (10.1.1) to the perimeter of at least one additional flat sheet of the assembly (60) where a cover (50) is also hingedly joined. In this way, the sheets are stacked by bending them by the articulated joint.
    [0390]
    [0391] In particular, the first sheet (10) would comprise a hinged joint (7) with the second sheet (20); while the second sheet (20) would comprise a hinged connection (7) with the third sheet (30), while the third sheet (30) would comprise a hinged connection (7) with the cover (50), the joints being articulated ( 7) on two opposite sides of the external contour (30.1.1) of the third flange (30.1) of the third sheet (30). In other words, the sheets are obtained in a quadripoic form by articulatable joints, allowing them to be flat when unfolded, and to be stacked when their hinged joints (7) are bent.
    权利要求:
    Claims (19)
    [1]
    1. - Complex (100) of flat sheets consecutively stacked, characterized in that it is configured to form a package (1) in a single execution, preferably to contain food products, where said complex comprises:
    ■ at least one first flat sheet (10) punched out, configured to be folded, comprising a first continuous flange (10.1) delimited by an external contour (10.1.1) and an internal contour (10.1.2), where said internal contour (10.1) .2) comprises a first portion (10.1.2.1) and the external contour (10.1.1) comprises a second portion (10.1.1.1), said first and second portions being corresponding;
    or wherein said at least one first sheet (10) further comprises at least one first main flange (10.2) extending along the first portion (10.1.2.1) of the internal contour (10.1.2) in the opposite direction to the second portion (10.1.1.1) of the external contour (10.1.1), the first main flange (10.2) being configured to form a wall (1.3) of the container (1); Y
    ■ an assembly (60) comprising at least one additional flat sheet, wherein the perimeter of the at least one additional flat sheet is delimited by the first flange (10.1) of the first flat sheet (10).
    [2]
    2. Complex (100) of flat sheets according to claim 1, characterized in that the assembly (60) comprises at least a second flat sheet (20) punched out, configured to be folded, comprising a second flange (20.1) whose external contour (20.1) .1) delimits the value of its perimeter, where said at least one second sheet (20) further comprises:
    ■ at least one second main tab (20.2) configured to form a base (1.2) of the container (1).
    [3]
    3. Complex (100) of flat sheets according to any of the preceding claims, characterized in that the at least one first sheet die cut (10) further comprises at least a first auxiliary flange (10.3) connected to the first main flange (10.2) and configured to form part of the base (1.2) of the container (1).
    [4]
    4. Complex (100) of flat sheets according to any of claims 2 or 3, characterized in that the at least one second flat sheet (20) stamped further comprises at least a second auxiliary flange (20.3) located between the second flange main (20.2) and the second flange (20.1).
    [5]
    5. Complex (100) of flat sheets according to the preceding claim, characterized in that at least a second auxiliary flange (20.3) of the at least one second sheet (20) comprises a breakable connection with the internal contour (20.1.2) of the second flange (20.1).
    [6]
    6. - Complex (100) of flat sheets according to any of the preceding claims, characterized in that the assembly (60) comprises at least one flat sheet of thermoplastic material (40) configured to form the liner of the container (1).
    [7]
    7. Complex (100) of flat sheets according to any of the preceding claims, characterized in that the assembly (60) comprises at least a third flat sheet (30) die cut, configured to be folded, comprising a third flange (30.1) with corners in its internal contour (30.1.2), wherein its external contour (30.1.1) delimits its perimeter, where said at least one third sheet (30) further comprises:
    ■ at least one third main flange (30.2) substantially diagonal to one of the corners of the internal contour (30.1.2) and connected to the third flange (30.1) by a first portion (30.1.2.1), said main flange (30.2) being configured to conform at least one chamfered corner (1.4) of the container (1).
    [8]
    8. - Complex (100) flat sheets according to the preceding claim, characterized in that at least a third main flange (30.2) further comprises at least a third auxiliary flange (30.3) located at a second end (30.2.2) of the minus a third main flange (30.2), the third auxiliary flange (30.3) being configured to rest on the at least one first auxiliary (10.3) and / or main flange (10.2) and / or on the at least second auxiliary flange (20.3) ) and / or principal (20.2).
    [9]
    9. - Complex (100) of flat sheets according to any of claims 2 to 8, characterized in that the assembly (60) further comprises a flat sheet (50) configured to form a cover so as to cover an object (2) contained in the package (1), preferably said flat sheet (50) is made of thermoplastic material.
    [10]
    10. - Complex (100) flat sheets according to any of the preceding claims, characterized in that the complex (60) further comprises joining means (3) located on the at least one first flat sheet (10) and / or the at least a flat sheet of the assembly (60).
    [11]
    11. Complex (100) of flat sheets according to the preceding claim, characterized in that the joining means (3) are a hot melt adhesive, preferably a thermoplastic adhesive.
    [12]
    12. Complex (100) of flat sheets according to the preceding claim and claim 6, characterized in that the joining means (3) located on the first flat sheet (10) or on the at least one flat sheet of thermoplastic material (40). ) are a strong adhesive, the adhesive being placed only on the first flange (10.1) or adjacent the perimeter (40.1) of the flat sheet of thermoplastic material (40), respectively.
    [13]
    13. - Complex (100) of flat sheets according to any of the preceding claims, characterized in that at least one of the at least one first flat sheet (10) punched out, the at least one second flat sheet (20) punched out, and / or the at least one third punched flat sheet (30) are made of cellulosic material, such as paper, pressed cardboard, and corrugated cardboard.
    [14]
    14. - Complex (100) of flat sheets according to any of the preceding claims, characterized in that the at least one first sheet (10) is hingedly linked by its external contour (10.1.1) to the perimeter of at least one flat sheet additional set (60).
    [15]
    15. - Method for obtaining a complex (100) of flat sheets consecutively stacked, complex (100) configured to form a package (1) in a single execution, characterized in that the method comprises the steps of:
    a) providing at least a first flat sheet (10) punched out, configured to be folded, comprising a first flange (10.1) delimited by an internal contour (10.1.2) and an external contour (10.1.1); Y
    b) providing a set (60) comprising at least one additional flat sheet, whose perimeter is delimited by the first flange (10.1) of the first flat sheet (10).
    [16]
    16. - The method for obtaining a complex (100) of flat sheets according to claim 15, characterized in that the method further comprises the steps of:
    c) providing joining means (3);
    d) locating the joining means (3) on at least the first flange (10.1) of the first flat sheet (10) and positioning at least one additional sheet on the first flat sheet (10) by matching its perimeter between the internal (10.1.2) and external (10.1.1) contours of the first flat sheet (10);
    [17]
    17. - Method for the manufacture of a container (1) to contain objects (2), preferably food products, characterized in that it comprises the steps of:
    a) providing a complex (100) of flat sheets according to claim 1 or a complex (100) obtained according to claim 15;
    b) providing a mold (4) and a piston (5) configured to embed flat sheets; c) positioning the first flange (10.1) of the first flat sheet (10) of the container (1) on the mold (4);
    d) introducing the piston (5) acting on the center of at least one additional flat sheet of the assembly (60);
    e) stopping the introduction of the piston once a predefined height of the depth of said container (1) has been achieved.
    [18]
    18. - Method for packaging at least one object (2), preferably food products, characterized in that it comprises the steps of:
    i. providing a package (1) manufactured according to the method of claim 17;
    ii. introducing at least one object (2) inside the container (1);
    iii. positioning on it a cover (50) comprising a perimeter (50.1) with a value delimited by the first flange (10.1) of the first flat sheet (10); Y
    iv. joining along the first flange (10.1) of the first flat sheet (10) causing the joining of at least one additional flat sheet of the assembly (60) with the cover (50), the inside of said container (1) being sealed .
    [19]
    19. - The method according to the preceding claim, characterized in that a given atmosphere or a vacuum is applied after stage ii), achieving packaging in a modified atmosphere, or a vacuum inside the container, and preventing its leakage or loss by sealing after stage iv).
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    同族专利:
    公开号 | 公开日
    CA3071220A1|2019-01-31|
    JP2020537618A|2020-12-24|
    EP3659936A2|2020-06-03|
    US20210086942A1|2021-03-25|
    WO2019020863A2|2019-01-31|
    ES2697705B2|2020-02-03|
    AU2018306348A1|2020-02-20|
    WO2019020863A3|2019-07-25|
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    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201730989A|ES2697705B2|2017-07-28|2017-07-28|COMPLEX OF FLAT SHEETS, METHOD FOR OBTAINING SUCH COMPLEX, METHOD FOR MANUFACTURING A CONTAINER AND METHOD FOR PACKING AN OBJECT|ES201730989A| ES2697705B2|2017-07-28|2017-07-28|COMPLEX OF FLAT SHEETS, METHOD FOR OBTAINING SUCH COMPLEX, METHOD FOR MANUFACTURING A CONTAINER AND METHOD FOR PACKING AN OBJECT|
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