• 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:
    A method for the manufacture of flexible containers of the type comprising a lower base and four side faces comprising supplying a pleated "w" band that determines an inverted "V" shaped bottom distinguishing a central fold and the steps of inserting sheets folded between the facing walls of the "w" band so that at least one joint portion in each folded sheet is attached to the facing walls and to the bottom in the inverted "V" shape of the band, and to ensure the unión of these sheets folded to the band in said portion or joint portions to determine dividing walls in the band prior to making transversal cuts on the band to individualize a container, the cuts being distanced so that each container includes at least two of said walls dividing walls that will form side walls in each container. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2600166A1
    申请号:ES201531100
    申请日:2015-07-24
    公开日:2017-02-07
    发明作者:José GARRIGA JIMÉNEZ；Andrea Fioravanti；Cristóbal JORGE ALESANCO
    申请人:PFM IBERICA PACKAGING MACHINERY S A；PFM IBERICA PACKAGING MACHINERY SA；
    IPC主号:
    专利说明:

    "A process for the manufacture of flexible containers comprising a bottom base of essentially rectangular configuration"
    Technical sector of the invention
    The invention relates to a process for the manufacture of flexible containers comprising a bottom base of essentially rectangular configuration from which four lateral sides of the container are joined together by their corners. The invention
    10 also refers to a module for the implementation of the procedure and a machine incorporating said module.
    Background of the invention
    Containers made from flexible material that they adopt are already known,
    15 when they are full, a form in which a flat, essentially rectangular base is distinguished, from which four side faces of the container are lifted together by their corners, two of which are located and juxtaposed in the upper part of the container for Close it up. Such packages are sometimes commercially identified with the designation "quad-seal" or "flat-bottom stand-up".
    20 There is a circumstance that in order to obtain these containers in an industrial way it is necessary to use several sheets of the material that constitutes the container that will be conveniently handled and joined together for the formation of the container. Such is the case, for example, of the methods of obtaining described in US Pat.
    25 2012231941 and WO 201540631 in which different sheets are used to form each of the four side walls of a container and another sheet added to form the base of the container.
    An alternative to this procedure is described in EP patent document
    30 15411332, in which the same sheet that forms a first major side face of the container also forms the lower base thereof. However, this way of proceeding requires having to manipulate, in the middle of forming the container, a critical area thereof. In particular, it is necessary to flatten the base of the container, once placed false leaves that will form two smaller lateral faces of the container, in order to be able to join the base and
    35 these false leaves another sheet that will form the second major side wall of the container.


    An object of the invention is a method of obtaining that allows to obtain containers with a reduced number of sheets.
    On the other hand, the complexity of the machines used to date for the preparation of these packages is significantly greater than that of the machines that make another type of containers also very well known, with only two lateral faces and consequently of different benefits, such as “doy-pack” or “stand-up pouch” containers, since the machines used are capable of continuously making containers from a single continuous sheet of flexible material that stretches from a sheet storage, or several sheets of flexible material stretched from respective stores and that are joined together along longitudinal seams to form a single sheet, which conveniently folded over itself and by joining operations of certain parts thereof allows the formation of successive open pockets superiorly that they are individualized by transverse cutting of the sheet or thus holding open containers. These machines conventionally integrate modules for filling containers and for closing them. Examples of machines for manufacturing this type of "doy-pack" container and several versions thereof are described in US 5845463; US 4216639; and GB 2351035.
    The greater complexity of the machines capable of forming “quad-seal” containers makes the resulting container expensive, and that their use is only economically profitable when the product contained in the containers offers a generous margin to the packer.
    Thus, to a large extent due to the high cost and complexity of the machines capable of making “quad-seal” containers, it is common to outsource this part of the packaging process, so that there are first companies that seek to manufacture the containers and second companies that, from pre-made containers, seek their filling and closing. This means that the packer has little control over the formation or preparation of the containers and that immediate changes in the type of packaging are not possible, unless the packer has in stock pre-made containers of different types. As is known, the stock entails expenses in storage and provisioning of products in stock.
    It is therefore also an object of the present invention a method and a device


    Especially suitable for integrating the manufacturing phase of “quad-seal” type packaging with the subsequent packaging phase, for example in the same production line or in the same machine.
    It is also an object of the invention to disclose a versatile method, which allows changes in the type of containers to be made in a simple manner.
    Another objective of the invention is also an alternative machine to the known machines for the manufacture of "quad-seal" type containers and a module by which "quad-seal" type containers can be made in combination with technical solutions already known in the sector, so that it is possible to adapt known production machines or processes for the implementation of the process according to the invention.
    Explanation of the invention.
    The proposed procedure is suitable for the manufacture of flexible containers of the type that comprise a lower base of essentially parallelogram configuration, such as square or rectangular, and four side faces, the procedure comprising the usual step in the manufacture of "type" containers. I give-pack ”of supplying a continuous band bent over itself around longitudinal fold lines forming a pleated zone in W that determines an inverted“ V ”shaped bottom distinguishing a central fold that is arranged between two facing walls of the band ; and the added steps of inserting folded sheets into the web between their facing walls so that at least a portion of the joint in each folded sheet is attached to the facing walls and the inverted "V" bottom of the web, and of ensure the joining of these folded sheets to the band in said portion or joining portions to determine dividing walls in the band prior to making transverse cuts on the band to individualize a container, the cuts being distanced so that each container includes at least two of said dividing walls, which will form two side walls in each container.
    Advantageously, the process according to the invention shares operations that are already customary for the manufacture of another type of containers in the industry, even if they are different containers such as "doy-pack" containers.
    This allows the same machine to be prepared to manufacture containers of two different types, that is “doy-pack” type containers or “quad-seal” type containers.


    Logically, a machine with this capacity offers some very interesting advantages to the packers that will be able to obtain “quad-seal” containers online, when at present they have to work with pre-made packages.
    In a variant of the process, the extension of the folded sheets is suitable for each making two lateral sides of two consecutive containers to be manufactured, each folded sheet comprising two joining portions whose joints with the facing walls and with the bottom determine a double dividing wall in the band, and the method comprises making transverse cuts in the band between the joining portions of the same folded sheet, so that on each side of the cross section a dividing wall will form a side wall of two consecutive containers.
    According to one embodiment, the method comprises the operations of supplying suitable extension sheets to each make two side faces of two consecutive containers to be manufactured, each sheet being provided in a central area with a series of fold lines according to a rhombic figure , inscribed on the sheet so that two opposite vertices end at respective edges of the sheet; and of a straight fold line with a central sector that extends between the other two vertices of the rhombic figure and two extreme sectors each extending from the central sector to a corresponding end of the leaf; fold the sheet around the extreme sectors of the straight fold line in one direction and fold the sheet around the central sector of said straight fold line in the opposite direction allowing the sheet to fold also around the sides of the rhombic figure to obtain a folded sheet that determines a flattened formation in which a sort of triangular, collapsible or collapsible peak is distinguished around the central sector of the straight bending line, and two lateral wings that will determine each a dividing wall in the band; arrange the sheet thus folded between the facing walls of the band so that the central sector of the straight fold line finds the central fold of the inverted "V" shaped bottom formed in the band determining the edges of the folded sheet and its imaginary straight extensions on the inside of the beak, two connecting portions of the folded sheet that are attached to the opposite walls and to the bottom of the band; and joining the band and the folded sheet in said joining portions to form the double dividing wall in the band.
    The invention provides that prior to joining the band and the folded sheet in saidjoining portions to form the double dividing wall in the band an operation is performed


    of preliminary union of the leaf to the band that consists of joining small areas of each lateral wing to each of the two facing walls of the band.
    As for the sheets, these can be cut from a continuous auxiliary band stretched from another band storage and the bending lines according to the rhombic figure and the straight bending line can be marked on them prior to or after being cut from the auxiliary band.
    In a variant, the method comprises the realization of longitudinal joint seams in the band coinciding with the fold lines that limit the bottom in
    "V" shape with each of the facing walls of the band once inserted the
    folded sheets on the band.
    In a variant, the folded sheets or the leaves from which the folded form is obtained, are provided in each joining portion, or adjacent thereto, of pairs of slits or perforations that are superimposed when the folded sheet is introduced into the band, the process comprising the operation of joining together the facing walls of the band or the side walls of a container through said grooves or perforations.
    Note that the operations carried out after introducing the folded sheets between the facing walls of the band in the manufacture of "quadseal" type packages may be coincident with those carried out in the preparation of "doypack" type packages. This allows, as explained below, that at least the filling and closing operations of the packages can be carried out in a filling and closing module of the packages located downstream of the cross-sectional operation of the band and that these means They do not have to be altered depending on whether the ready-made containers are of one type or another. Moreover, even the means used to make transverse seals in the band and to form seams at the base of the containers can be coincident for both packages. Therefore, it is possible to make the “quadseal” type containers and fill them and close them in the same machine also capable of making “doy-pack” containers, using the same means of sealing, cutting, filling and closing of The containers.
    That is why according to another aspect of the invention a method is disclosed


    for the manufacture of flexible containers of the type comprising a lower base and at least two facing side faces, which comprises the operation of supplying a continuous band bent over itself around longitudinal fold lines forming a pleated area in W that determines a bottom in the form of an inverted "V" distinguishing a central fold that is arranged between two facing walls of the band, intended to form first and second side faces facing a container, the procedure being characterized in that it comprises selecting the type of container to be manufactured from between at least two types - a first type in which the side faces of the container are joined together determining two side seams in the finished container, for which the procedure comprises the step of making transverse seals in the band to join the facing walls of the band prior to cross cutting you the band to individualize a container; or - a second type in which a third and a fourth lateral faces are interposed on each side of the container, giving the container the ability to adopt an essentially square or square shape in plan, for which the The method includes the step of inserting and joining folded sheets in the band between their facing walls to determine dividing walls in the band prior to making cross cuts on the band to individualize a container, the cuts being distanced so that each container includes at least two of said dividing walls, which will form two side walls in each container.
    According to another aspect of the invention, a module for the implementation of the process is presented, said module comprising means prepared to supply previously manipulated sheets for marking in them preferred bending lines; folding means and introductors that act in a coordinated manner to shape the sheet by folding it around the preferred bending lines and to accompany the folded sheet until it is disposed within the band and so that at least a joint portion in the folded sheet is attached to the facing faces and the inverted "V" shaped back of the band; and means for ensuring the attachment of these sheets to the strip in said joining portions to determine dividing walls in the strip.
    According to a variant, the folding means and introductors comprise apusher, movable to the band in an essentially normal direction to theextension of it; and an introductory template, generally funnel and intended


    to be crossed by the assembly formed by the pusher and the folded sheet that accompanies said pusher on its path to the band.
    In one form of interest, the folding means and introductors comprise a series of
    5 edges formed on the pusher acting on the blade during its push in combinationwith the step section offered by the introductory template, whose profile determines the clearance gaugethe folded sheet as it passes through the introductory template.
    Preferably, the module comprises stop means intended to receive support in
    10 sliding mode of the bottom of the band and ready to act as the end of the folded sheet with the interposition of the bottom of said band.
    It is contemplated that the stop means are heated.
    In a variant, the module comprises pre-welding means, prepared to provisionally and in small areas join the sheets to each of the facing walls of the band.
    A machine for the manufacture of flexible containers of the type comprising a base
    20 bottom configuration essentially in parallelogram and four side faces, can comprise means to provide a continuous band bent over itself around longitudinal fold lines forming a pleated area in W that determines an inverted "V" shaped bottom distinguishing a central fold that is arranged between two facing walls of the band; and a module according to the invention.
    Among the containers obtainable with the process according to the invention, a flexible container comprising a lower base of essentially parallel configuration from which four lateral faces are raised, the lower base being formed and two of its lateral faces not formed contiguous by the same sheet; and both sides
    30 remaining sides by each auxiliary leaves; wherein said remaining side faces are in an upper part of the container folded inwardly thereof, the container being able to adopt in said upper part a flat shape by juxtaposition of the side faces; and in which parts of the container have been joined in this upper part to prevent the deployment of said lateral faces in the form of joints between parts of the
    35 sheet through the remaining side faces; and / or joints of each of the side faces


    remaining to the sheet on one of the side faces.
    Brief description of the drawings
    Fig. 1 is a schematic view of the process according to a variant of the invention;Fig. 2, is a view of a module for the introduction of a folded sheet between the wallsfacing the band from which two lateral faces and the base of acontainer;Fig. 3 is a schematic view of the operation of introducing the folded sheet betweenthe facing walls of the band;Fig. 4, is a sectional view according to a plane of normal cut to the band showing theinstant in which the folded sheet is arranged between the facing walls of the bandand so that the folded sheet finds the central fold of the bottom in the form of an inverted "V";Figs. 5, 6 and 7 are a sequence of obtaining the folded sheet from a sheetmarked with preferred bending lines;Fig. 8a shows the folded sheet having indicated two connecting portions intendedto join the facing walls of the band to form a double dividing wall;Fig. 8b shows the folded sheet of Fig. 8a, according to a bottom view and with its portion infully open peak to illustrate the junction portions with the bottom of the band in thispart of the folded sheet;Figs. 9 and 10, show schematic views in perspective and in plan,respectively, of the operations performed once the folded sheets are inserted betweenthe walls of the band;Fig. 11 is another schematic view and according to an alternative to the procedure of Fig. 10of the operations performed once the folded sheets are inserted between the walls of theband;Figs. 12 and 13 show an empty finished container and when it adopts a full shape,respectively, obtainable with the process of the invention;Figs. 14 and 15, show another empty finished container and when it adopts a full shape,respectively, obtainable with the process of the invention;Fig. 16a shows schematically and in section the package of Figs. 14 and 15; YFig. 16b shows in greater detail but schematically the same container, in aopen shape, according to the cutting plane AA of Fig. 16a.
    Detailed description of an embodiment of the invention
    Fig. 1 schematically shows the main operations of a procedure for the


    manufacture of flexible containers 1 of the type comprising a bottom base 3 of essentially rectangular configuration and four side faces 4, 5, 6a, 6b using in the example only a main band 2 and an auxiliary band 21.
    5 The procedure of Fig. 1 comprises the operation of supplying the band 2 from aband storage and bending over itself to bending lineslongitudinal forming a pleated zone in W that determines a 3 ’bottom in a“ V ”shapeinverted distinguishing a central fold 7 that is arranged between two wallsfaced 4 ’, 5’ from band 2.
    10 Although in the example this W-formation is obtained by folding a single starting band 2 it is understood that the W-formation can be obtained by joining several starting bands along longitudinal seams. That is, in the context of the invention the band that folds to obtain the W-shape can be formed by a single sheet or by several
    15 sheets joined together.
    As Fig. 1 illustrates, the W-formation having been obtained, the procedure comprises the added steps of inserting folded sheets 66 in the band 2 between their facing walls 4 ', 5' and ensuring the joining of these folded sheets 66 to the band 2 to determine pairs of
    20 dividing walls 6a ', 6b' in the band 2 prior to making transverse cuts on the band 2 to individualize a container 1, the cuts being distanced so that each container 1 includes at least two of said dividing walls 6a ', 6b ', which will form two side walls 6a, 6b in each container 1.
    25 Figs. 2 to 4 shows a module 33 that seeks to prepare these folded sheets 66, their introduction in band 2 and their preliminary bonding in band 2.
    Specifically, this module 33 comprises folding means and introducers 28 that act in a coordinated manner to shape sheets 6, folding them around lines.
    30 preferred bending, and to move the folded sheets 66 until disposed within the band 2.
    In the example of Fig. 2, the folding and introducer means 28 comprise a pusher 22 movable in an essentially normal direction to the extension of the band 2 between two
    35 positions: a waiting position A (shown in Fig. 2) and an operating position B


    (shown in Figs. 4 and 10).
    The folding means and introducers 28 further comprise an introducer template 22 ’,fixed in the example, in general funnel form and intended to be crossed by the pusher5 22 in his career towards band 2.
    The module 33 also comprises means for supplying sheets 6, of suitable extension in this case to form two side faces of a finished container, manipulated to mark in them preferred bending lines, and to arrange them between
    10 pusher 22 and introducer template 22 ’when the pusher adopts the waiting position A.
    In the pusher 22 a series of edges 31 are machined or formed that act on the sheet 6 when the pusher is driven in the direction of the band 2 so that they bend the
    15 sheet 6 by the aforementioned preferred bending lines while moving the sheet in the direction of the band 2. These edges 31 act in combination with the passage section offered by the introducing template 22 ', whose profile determines the clearance gauge. sheet already folded 66 as it passes through said introducer template 22 ', all as illustrated in Fig. 2.
    20 Although in the example the module 33 comprises means for stretching a continuous auxiliary band 21 of a corresponding storage; to transversely cut the auxiliary band 21 to obtain the sheets 6; and to mark on the sheets 6 the preferred fold lines, the invention also contemplates that the module 33 be provided with sheets 6, dispensed from a storage of sheets 6. In this case, it is contemplated that the
    25 stored sheets 6 are already marked or that the module 33 is provided with the necessary means to mark the sheets 6 before dispensing them for introduction into the band 2.
    In any case, module 33 is complemented with stop means 24, visible in theFigs. 3 and 4, destined to receive the sliding mode support of the 3 ’background of band 2 and
    30 prepared to act as the end of the stroke of the folded sheet 66, with interposition of the bottom 3 'of said band 2, during the operation of inserting the folded sheet 66 in the band 2.
    These stop means 24 contribute to the folded sheet 66 being perfectly seated in the central fold 7 of the band 2, which is of interest to perfect the preparation of
    35 containers 1.


    This operation is illustrated in better detail in Figs. 3 and 4, which show how module 33 is further provided with pre-welding means 23, prepared to provisionally and in small areas join the sheets 66 to each of the facing walls 4 ', 5' of the band 2 once said sheets are perfectly seated in the central fold 7 of the band 2. To facilitate the understanding of this operation in Fig. 4 the pusher 22 has been shown outside the folded sheet 66 when in fact the folded sheet 66 wraps on the outside of said pusher 22 during its movement in the direction of the band 2, as correctly illustrated in Fig. 4.
    Figs. 5 to 7 show in detail a way of proceeding of particular interest to obtain the folded sheet 66 from a sheet 6.
    According to this procedure, as shown in Fig. 5, an oblong sheet 6 of sufficient length is formed to form two side walls in the containers to be made. This sheet 6 is provided in its central area with a series of fold lines according to a rhombic figure 9, inscribed on the sheet 6 so that two opposite vertices 9a, 9b end at respective edges 10, 11 of the sheet 6; and of a straight fold line 12 with a central sector 12a extending between the other two vertices 9c, 9d of the rhombic figure 9 and two end sectors 12b, 12c each extending from the central sector 12a to a corresponding end of sheet 6. As explained below, the fact that this central sector 12a is all continuous, without continuity solution, contributes significantly to minimizing unwanted defects in the packaging of packages 1.
    Figs. 6 and 7 become a sequence of the folding of the sheet 6. In particular, the sheet 6 is folded in one direction around the end sectors 12b, 12c of the straight fold line 12 and in an opposite direction around the central sector 12a of said straight fold line allowing the sheet 6 to also fold around the sides 99a; 99b; 99c; 99d of the rhombic figure 9 to obtain the folded sheet 66 with the flattened shape illustrated in Fig. 7. In this folded form, the central sector 12a that extends without interruption along the entire width of the folded sheet stands out 66 and which will therefore allow the correct seat of the folded sheet 66 on the central fold 7 of the band 2.
    In the flattened formation of said Fig. 7, a sort of triangular peak 13 is distinguished, which can be folded precisely around the central sector 12a of the straight fold line 12, and two lateral wings 14a, 14b which will determine each dividing wall 6a ', 6b '(see Fig. 1) in band 2.


    It is interesting to note that the inner surface of the peak 13, shown deployed in Fig. 8a, intended to be juxtaposed to the bottom 3 of the band 2, is a surface without interruption, in fact determined by the rhombic figure 9 on the sheet 6 of departure.
    These lateral wings 14a, 14b will be perfectly parallel and vertical, that is normal to the central fold 7 and consequently to the future base of the ready-made container, thanks to the support without discontinuities offered by the central sector 12a, favoring the correct preparation of said container.
    Fig. 8 shows definable connecting portions 20a, 20b in the folded sheet 66 that will be attached to the facing walls 4 ', 5' and to the bottom 3 'of the band 2 when the folded sheet is disposed between the facing walls 4 ', 5' thereof and the central sector 12a finds the central fold 7 of the band 2. Conveniently placed the folded sheet 66 in this position, without removing the pusher 22 as illustrated in Figs. 4 and 10, a preliminary joining operation of the sheet 66 is performed to the band 2 which consists of joining small areas 34 (see Figs. 9 and 11) of each side wing 14a, 14b to each of the two facing walls 4 ', 5' of the band 2, using the pre-welding means 23, prior to stretching the band 2 and proceeding at a workstation downstream to join the band 2 and the folded sheet 66 along the portions of junction 20a, 20b to form the double dividing wall 6a ', 6b' in the band 2.
    In a manner known per se, the pre-welding means 23 can consist of welding rods that provide heat to the material of which the band 2 and the folded sheet 66 are constituted, for its connection by thermo welding. It is noted that the pusher 22 provides the necessary support so that the band 2 and the folded sheet portion 66 attached do not sink inwards when the welding bars exert pressure from the outer face of the facing walls 4 'and 5' of the band 2 during the preliminary joining operation between the band 2 and the folded sheet 66.
    Downstream of this preliminary joining operation the procedure illustrated by way of example comprises the operations of carrying out transverse seals in the assembly formed by the band 2 and the sheets 66 in coincidence with the joining portions 20a and 20b, for example by the set of welding bars 25; and to make joint seams in the bottom 3 ’of the band 2 between the transverse seals and in each of the longitudinal transition folds between said bottom 3’ and each of the facing walls 4 ’and


    5 ', for example by means of the set of welding rods 26. The welding rods 25 and 26 can be of the type that provide heat to heat-weld the inner faces of the band 2 that are mutually attached, which occurs in the folds area of
    transition between the bottom 3 and the facing walls 4 ’and 5’ of band 2 where there is no
    interference with the folded sheets 66, and also the contact areas between the folded sheet 66 and the band 2 in the joining portions 20a and 20b.
    In order that the temperature is adequate in the most separated areas of the welding bars 25 and 26, that is in the innermost points of the package formed by the band 2 and the folded sheet 66, for example in the zone of the connecting portions 20a and 20b corresponding to the peak 13 attached to the bottom 3 'of the band 2 in the vicinity of the central sector 12a, it is contemplated that the stop means 24 are heated, to help the thermal jump between the bars of weld 25 and / or 26 and these internal points of the package are smaller and less time is required to make a correct weld joint.
    Subsequently, cross sections 16 are made (see Fig. 11) to individualize ready-made containers. In the example, the cuts 16 are made in coincidence with each folded sheet 66 and specifically between each pair of dividing walls 6a ’, 6b’ formed by the union of each folded sheet 66 with the band 2.
    In other envisaged variants, it is possible to distance the transverse cuts 16 so that the cut is made every two or more folded sheets 66, so that each container 1 includes a folded sheet 66 in the middle, which can perform the function of intermediate partition in the space offered by the container to store in this case two separate products and / or of different nature.
    In a variant of the procedure illustrated in Fig. 11, downstream of the preliminary bonding operation the method first comprises making seams at the bottom 3 'of the band 2 between each two folded sheets 66 and in each of the folds Longitudinal transition between said bottom 3 'and each of the facing walls 4' and 5 ', by means of the
    welding bar set 26; to subsequently make the transverse seals in the assembly formed by the band 2 and the sheets 66 in coincidence with the joining portions 20a and 20b, by means of the set of welding bars 25.


    The effects that welding bars 25 and 26 produce in a finished container 1 are
    schematically depicted in packages 1 of Figs. 13 and 15, with references 25 ’and 26’, respectively.
    Once the packages 1 have been identified, they can be filled and closed along the same line using identical means as those used in a conventional module for filling and closing the “doy-pack” type. By way of example, the use of packaging transfer means and a horizontal packaging machine such as that described in patent document WO2014207278 is contemplated. Thus, in the same line, packages 1 are made; and they are filled and closed for delivery for example to a packaging station.
    In the example of Figs. 13 and 14, for the direct connection of the side walls 4 and 5 of the container in the area close to its upper mouth, the procedure contemplates that the sheets 66 are provided in each joint portion 20a, 20b, or adjacent thereto, of pairs of grooves or perforations 27 that are superimposed when the folded sheet 66 is introduced in the band 2, so that the transverse seal with the welding bars 25 ensures contact through said grooves or perforations and the consequent union with each other of the facing walls 4 ', 5' of the band 2, that is to say of the side walls 4, 5 of the container 1 once the transversal cut 16 has been made. The union of the side walls 4 and 5 provides the container 1 with a flattened shape in its upper mouth, suitable for being held by its edges by means of tweezers of the type used for transport and for opening, filling and closing operations .
    Fig. 16 schematically shows a detail of the container obtainable according to the invention and illustrated in Figs. 14 and 15 from its upper opening, when said opening is forced into an open position. This container 1 is provided with an accessory for its reversible closure, for example in the form of a zipper-type closure 35, schematically represented in Figs. 14 and 15.
    In this case it may be of interest that the two halves of the side wings 14a and 14b of the corresponding side walls 6a, 6b are juxtaposed and folded to one side, joined in zones 36 to a side wall 4 or 5 of the container 1, a effects of guaranteeing the sealing of the same when the side walls 4 and 5 are juxtaposed and joined together and that there are no residues of the product that fills the container 1 in the slope formed by the outer face of


    said side walls 6a and 6b, folded into the container 1 at its upper end.
    Advantageously, the operations that are carried out downstream of the preliminary connection of the folded sheet 66 to the band 2 are compatible, that is, they can be performed, using the same means provided for this purpose by machines that manufacture doypack type containers. These machines are also generally provided with means for supplying a starting band and for folding it on itself for the purpose of obtaining a W-shape. Consequently, by equipping such a machine with a module 33 it is possible to manufacture 10 “I give” containers -pack ”or“ quad-seal ”type containers simply by enabling or disabling module 33, that is, selecting whether or not to enter between
    opposite walls 4 ’, 5’ of the band 2 the folded sheets 66 whose union with the band will first form dividing walls 6a ’, 6b’ in the continuous band 2 that will later become side faces 6a, 6b in ready-made containers when cutting
    15 transverse the band 2 in coincidence with the folded sheets 66 as explained above.

    权利要求:
    Claims (16)
    [1]
    1.-A process for the manufacture of flexible containers (1) of the type comprising a lower base (3) of configuration essentially in parallelogram and four lateral faces (4, 5, 6a, 6b), the procedure comprising the operation of - supplying a continuous band (2) bent over itself around longitudinal fold lines forming a pleated zone in W that determines an inverted "V" shaped bottom (3 ') distinguishing a central fold (7) that is arranged between two facing walls (4 ', 5') of the band (2), the method further comprising the steps of inserting folded sheets (66) into the band (2) between their facing walls (4 ', 5') so that at least one joining portion (20a, 20b) on each folded sheet (66) is attached to the facing walls (4 ', 5') and to the bottom (3 ') in the form of an inverted "V" of the band (2 ), and - try to join these folded sheets (66) to the band (2) in said portion or portion joining ones (20a, 20b) to determine dividing walls (6a ', 6b') in the band (2) prior to making transversal cuts (16) on the band (2) to individualize a container (1), distancing itself the cuts (16) so that each container (1) includes at least two of said dividing walls (6a ', 6b'), which will form two side walls (6a, 6b) in each container (1).
    [2]
    2. A method according to claim 1, characterized in that the extension of the folded sheets (66) is suitable for each making two side faces (6a, 6b) of two consecutive containers to be manufactured, each folded sheet (66) comprising two junction portions (20a and 20b) whose junctions with the facing walls (4 ', 5') and with the bottom (3 ') determine a double dividing wall (6a' and 6b ') in the band (2), and because the method comprises making transverse cuts (16) in the band (2) between the joining portions (20a and 20b) of the same folded sheet (66), so that on each side of the transverse cut (16) a dividing wall ( 6a ', 6b') will form a side wall (6a, 6b) of two consecutive containers.
    [3]
    3. A method according to the preceding claim, characterized in that it comprises the operations of -supplying sheets (6) of suitable extension to each make two lateral faces (6a, 6b) of two consecutive containers to be manufactured, each sheet being provided (6 ) in a central area of a series of bending lines according to a rhombic figure (9), inscribed on the sheet (6) so that two opposite vertices (9a, 9b) end at respective edges (10, 11)

    of the leaf (6); and of a straight fold line (12) with a central sector (12a) that extends between the other two vertices (9c, 9d) of the rhombic figure (9) and two extreme sectors (12b, 12c) that extend each one from the central sector (12a) to a corresponding end of the sheet (6); -fold in one direction the sheet (6) around the extreme sectors (12b, 12c) of the straight bending line (12) and fold in a opposite direction the sheet (6) around the central sector (12a) of said line Straight bending allowing the sheet to fold also around the sides (99a; 99b; 99c; 99d) of the rhombic figure (9) to obtain a folded sheet (66) that determines a flattened formation in which a luck is distinguished of triangular peak (13), foldable around the central sector (12a) of the straight bending line (12), and two lateral wings (14a, 14b) that will determine each a dividing wall (6a ', 6b') in the band (2); - arrange the sheet thus folded (66) between the facing walls (4 ’, 5’) of the band (2) so that the central sector (12a) of the straight fold line (12) finds the central fold
    (7) of the bottom (3 ') in the form of an inverted "V" formed in the band (2) determining the edges (10, 11) of the folded sheet (66) and its imaginary straight extensions on the inside of the peak ( 13) two joining portions (20a, 20b) of the folded sheet (66) that are attached to the facing walls (4 ', 5') and to the bottom (3 ') of the band (2); and joining the band (2) and the folded sheet (66) in said joining portions (20a, 20b) to form the double dividing wall (6a ’, 6b’) in the band (2).
    [4]
    4. A method according to the preceding claim, characterized in that prior to joining the band (2) and the folded sheet (66) in said joining portions (20a, 20b) to form the double dividing wall (6a ', 6b ') in the band (2) a preliminary joining operation of the sheet (66) is performed to the band (2) consisting of joining small areas (34) of each side wing (14a, 14b) to each of the two facing walls (4 ', 5') of the band (2).
    [5]
    5. A method according to any one of claims 3 or 4, characterized in that the sheets (6) are cut from a continuous auxiliary band (21) stretched from another band storage and because the bending lines are marked therein according to the rhombic figure (9) and the straight fold line (12) prior to or after being cut from the auxiliary band (21).
    [6]
    6. A method according to any one of the preceding claims, comprisingthe realization of longitudinal joint seams in the band (2) in coincidence with thefold lines that limit the bottom (3 ’) in a“ V ”shape with each of the walls

    facing (4, 5 ’) of the band (2) once the folded sheets (66) have been inserted in the band (2).
    [7]
    7. A method according to any one of the preceding claims, wherein the folded sheets (66) are provided in each joint portion (20a, 20b), or adjacent thereto, with pairs of slits or perforations (27) that they are superimposed when the folded sheet (66) is introduced into the band (2), the process comprising the operation of
    join together the opposite walls (4 ’, 5’) of the band (2) or the side walls (4, 5) of
    a container (1) through said grooves or perforations.
    [8]
    8.-A process for the manufacture of flexible containers (1) of the type comprising a lower base (3) and at least two side faces (4, 5) facing each other, comprising the operation of -supplying a continuous band (2) folded on itself around longitudinal fold lines forming a pleated zone in W that determines an inverted "V" shaped bottom (3 ') distinguishing a central fold (7) that is arranged between two facing walls (4', 5 ') of the band (2), intended to form first and second side faces (4, 5) facing a container, the procedure being characterized in that it comprises selecting the type of container to be manufactured from at least two types
    - a first type in which the side faces (4, 5) of the container are joined together determining two side seams in the finished container, for which the method comprises the step of making transverse seals in the band (2) to join between yes the facing walls (4 'and 5') of the band prior to cross cutting the band (2) to individualize a container; or -a second type in which between the side faces (4, 5) of the container a third (6a) and a fourth (6b) side faces are interposed on each side of the container, giving the container the ability to adopt in plan an essentially quadrangular or square shape, for which the procedure comprises the step of inserting folded sheets (66) into the band (2) between their facing walls (4 ', 5') so that at least a joint portion (20a , 20b) on each folded sheet (66) remains
    attached to the opposite walls (4 ’, 5’) and the bottom (3 ’) in an inverted“ V ”shape of
    the band (2); and ensure the attachment of these folded sheets (66) to the band (2) in said
    junction portion (20a, 20b) to determine dividing walls (6a ’, 6b’)
    in the band (2) prior to making transversal cuts (16) on the band
    (2) to individualize a container (1), the cuts (16) being distanced so that
    each container (1) includes at least two of said dividing walls (6a ’, 6b’), which

    they will form two side walls (6a, 6b) in each container (1).
    [9]
    9.-A module (33) for the manufacture of flexible containers (1), suitable to form dividing walls (6a ', 6b') in a continuous band (2) folded over itself around longitudinal fold lines forming an area pleated in W that determines a bottom (3 ') in the form of an inverted "V" distinguishing a central fold (7) that is arranged between two facing walls (4', 5 ') of the band (2); said module comprising - means prepared to supply sheets (6) previously manipulated to mark in them preferred bending lines; -a folding means and introducers (28) that act in a coordinated manner to shape the sheet (6) by folding it around the preferred bending lines and to accompany the folded sheet (66) until it is disposed within the band (2 ) and so that at least a joint portion (20a, 20b) in the folded sheet (66) is attached to the facing faces (4 ', 5') and to the bottom (3 ') in the form of an inverted "V" of the band (2); and -a means to ensure the joining of these sheets (66) to the band (2) in said joining portions (20) to determine dividing walls (6a ', 6b') in the band ( 2).
    [10]
    10. A module (33) according to the preceding claim, characterized in that -the folding means and introducers (29) comprise a pusher (22), movable towards the band (2) in an essentially normal direction to the extension of the same; and an introductory template (22 ’), in general funnel form and intended to be traversed by the assembly formed by the pusher and the folded sheet (66) that accompanies said pusher
    (22) in its trajectory towards the band (2).
    [11]
    11. A module (33) according to the preceding claim, characterized in that the folding means and introducer (28) comprise a series of edges (31) formed in the pusher
    (22) acting on the blade (6) during its push in combination with the passage section
    offered by the introductory template (22 ’), whose profile determines the gauge of the folded sheet (66) as it passes through the introductory template (22’).
    [12]
    12. A module (33) according to any one of claims 9 to 11, characterized in that it comprises stop means (24) intended to receive the sliding support of the bottom (3 ') of the band (2) and prepared to act as the limit switch of the folded sheet (66) with interposition of the bottom (3 ') of said band (2).

    [13]
    13. A module (33) according to the preceding claim, characterized in that the stop means
    (24) are heated.
    [14]
    14. A module (33) according to any one of claims 9 to 13, characterized in that
    5 comprises pre-welding means (23), prepared to provisionally and in small areas join the sheets (66) to each of the facing walls (4 ’, 5’) of the band (2).
    [15]
    15.-A machine for the manufacture of flexible containers (1) of the type comprising
    10 a lower base (3) of essentially parallelogram configuration and four lateral faces (4, 5, 6a, 6b), the machine comprising - means for supplying a continuous band (2) bent over itself around
    longitudinal fold lines forming a pleated zone in W that determines an inverted "V" shaped bottom (3 ') distinguishing a central fold (7) that is arranged between two facing walls (4', 5 ') of the band (2); and -a module according to any one of claims 9 to 14.
    [16]
    16.-A flexible container (1) comprising a lower base (3) of essentially parallel-shaped configuration from which four lateral faces (4, 5, 6a, 6b) are raised, 20 the lower base (3) being fully formed and two of its lateral faces (4, 5) not contiguous by the same sheet; and the two remaining lateral faces (6a, 6b) by each auxiliary leaves; wherein said remaining side faces are in an upper part of the container (1) folded towards the inside thereof, the container being able to adopt in said upper part a flat shape by juxtaposition of the side faces (4, 5); and in which
    25 have joined parts of the container in this upper part to prevent the deployment of said side faces in the form of joints between parts of the sheet through the remaining side faces; and / or -unions of each of the remaining side faces to the sheet on one of the side faces.

    DRAWINGS


    Fig. 8a Fig. 8b



    Fig. 15
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    同族专利:
    公开号 | 公开日
    EP3326797B1|2021-05-26|
    US20180370173A1|2018-12-27|
    PL3326797T3|2021-12-13|
    ES2879816T3|2021-11-23|
    WO2017017298A1|2017-02-02|
    ES2600166B1|2017-11-17|
    EP3326797A1|2018-05-30|
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    ES201531100A|ES2600166B1|2015-07-24|2015-07-24|A process for the manufacture of flexible containers comprising a bottom base of essentially rectangular configuration|ES201531100A| ES2600166B1|2015-07-24|2015-07-24|A process for the manufacture of flexible containers comprising a bottom base of essentially rectangular configuration|
    ES16759813T| ES2879816T3|2015-07-24|2016-07-15|A process for the manufacture of flexible containers comprising a lower base of essentially rectangular configuration|
    US15/747,345| US20180370173A1|2015-07-24|2016-07-15|Flexible containers comprising a lower base of essentially rectangular configuration, method, module and machine for their manufacture|
    PL16759813T| PL3326797T3|2015-07-24|2016-07-15|Flexible containers comprising a lower base of essentially rectangular configuration, method, module and machine for their manufacture|
    PCT/ES2016/070536| WO2017017298A1|2015-07-24|2016-07-15|Flexible containers comprising a lower base of essentially rectangular configuration, method, module and machine for their manufacture|
    EP16759813.5A| EP3326797B1|2015-07-24|2016-07-15|Flexible containers comprising a lower base of essentially rectangular configuration, method, module and machinefor their manufacture|
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