• 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:
    Closing foil of wound products, method of manufacture of the same and machine that executes it. The present invention relates to a closure sheet for wound products that is created from a recycled paper backing with a water-repellent varnish to prevent curling caused by the short fibers of the recycled paper that forms the backing. The manufacturing method that allows a sheet like the previous one to be made is based on continuously cutting the original coil longitudinally, according to the width of the sheet, and placing the tear strip, without there being a rewind between said two phases. The machine that develops the above method is also defined in the present invention. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2787723A1
    申请号:ES201930340
    申请日:2019-04-15
    公开日:2020-10-16
    发明作者:Marco Francesc Egea
    申请人:Marco Francesc Egea；
    IPC主号:
    专利说明:

    [0002] COILED PRODUCTS CLOSURE FOIL, MANUFACTURING METHOD OF THE
    [0004] The present invention refers to a closing sheet for wound products, such as those corresponding to garbage bag reels, which allow the winding to be held together and have an opening system to be able to extract said products.
    [0006] The present invention also relates to a method of manufacturing said closure sheet, as well as the machine that executes the same.
    [0008] Background of the invention
    [0010] For the closure of wound products, such as the roll of garbage bags, a sheet is used in a habitual way that wraps said roll closing on itself and preventing the coil from unraveling while the end user does not decide to open the set. .
    [0012] In order to open the assembly, various systems are available, the most common being the detachment of the end of the sheet that has closed it on itself, as well as the micro-perforation for breaking a strip or line of the closing sheet, or the application of auxiliary strips for breaking the sheet.
    [0014] These systems, which allow the assembly to be opened by undoing the joint of the closing sheet, have production methods that, in the case of having to install auxiliary opening elements, such as auxiliary breaking strips, are carried out in at least two stages discontinuous always starting from an original coil on which the division has to be made into various coils cut to the specific width of the closing sheet. These stages are, on the one hand, that of cutting the original coil into various coils of a lower width corresponding to the final width of the closing sheet, performing a rewinding of said new resulting coils, while on the other hand, there is the step of placing the auxiliary self-adhesive tear strip, rewinding the whole.
    [0016] These two discontinuous stages make it necessary to foresee tension problems in both processes, as well as differentiated machines and, therefore, a transit of material from one to the other.
    [0017] On the other hand, in the manufacture of said closing sheets, conventional non-recycled, or biodegradable materials are used, which allow the performance of the sheet with a high flatness, without bending, so that considerable sheet widths are applied without risk of curving of the material, and therefore, without having problems in the final application.
    [0019] Description of the invention
    [0021] The aim of the present invention is to provide a closing foil for a wound product, as well as a manufacturing method, which manages to solve the aforementioned drawbacks, presenting other advantages that will be described below.
    [0023] According to this objective, according to a first aspect, the present invention provides a closure sheet for wound products which are arranged around said wound products closing on itself and which has at least one tear strip transverse to the Envelope arrangement over the wound products.
    [0025] When defining the tear strip as a strip arranged transversely, it must be considered that the strip is located in such a way that it cuts the width of the closure sheet, for this reason a general terminology of a transverse arrangement of the strip with respect to the wrapping direction of the closure foil, generally considered as a longitudinal arrangement. It is included within said terminology used of "transverse" arrangement of the tear strip, any arrangement of said tear strip in which it breaks the continuity of the sheet in the wrapping direction on the wound product.
    [0027] This invention is characterized by the fact that the closing sheet is formed by a support that comprises a composition of recycled paper or recycled paper and biodegradable material, in a percentage of said compositions of at least 75% of the total material of support, wherein the paper support has at least one layer of waterproof varnish coating on one of its faces.
    [0029] When the present description refers to recycled paper, it refers to the formation of the support including the indicated percentage of paper formed from a paper recovery process, which has been shredded and converted into paper mass to later become part of the substrate. indicated. The indicated percentage of recycled paper above 75% is It establishes that it is considered that at least this 75% comes from recycled sources and allows to have a sufficient majority of recycled composition of the total material used in the formation of the support.
    [0031] When the present description refers to recycled and biodegradable paper, it refers, in addition to the previous considerations of recycled paper, to the formation of the support including the indicated percentage of paper formed by raw materials that have a decomposition process in natural chemical elements according to EN13432-2000 standard.
    [0033] The configuration indicated allows to have a product made of recycled material, or recycled and biodegradable, with the corresponding advantages of reuse of recycled materials and decomposition into natural elements. This use of recycled material or recycled and biodegradable material, of the paper type, has the disadvantage, in the present application of creating closure sheets, the curving of the paper support due to the short length of the fibers that form said support with material from recycled paper, since in the paper recycling process these fibers are cut by shredding the paper prior to recycling.
    [0035] Advantageously, by applying a water-repellent varnish, a substantially greater planimetry of the support that forms the sheet is achieved, increasing the flat arrangement of the width of the support with said layer of water-repellent varnish, with respect to the more curved arrangement of the width of the support without said application of water-repellent varnish.
    [0037] This application of the water-repellent varnish layer makes it possible to increase the flat arrangement by over 50% with respect to the curvature created in the support in its width. correcting in these percentages the bending in width of the sheet with nominal widths of between 6 and 19 cm. Said application of water-repellent varnish increases the surface tension created by the coating layer with said varnish and, in this way, increases the tension of the fibers that form the support of the sheet, preventing its bending.
    [0039] The percentage of increase in planimetry is calculated by comparing the nominal width of the sheet, with the real width free of tension exerted by means that act on it and proportionally relating said variation to the same variation in the case of the use of a support with varnish and a support without varnish.
    [0040] The greater the width of the sheet, the greater the bending action of the support, which conventionally dispenses with the use of large widths in the formats of said sheets. The fact of allowing to have a greater width of the closure sheet without the effect of curving, thanks to the composition and treatment of the sheet, advantageously allows to offer a closure sheet of greater width without this effect of curvature and, therefore , of greater surface for the application of the desired impression.
    [0042] With the application of a layer of water-repellent varnish to the support, a layer is created that prevents the entry of moisture to the fibers that make up the support, with which it has been verified that this decrease in the possible entry and absorption of moisture from the short fibers of the recycled material support, prevent said fibers from bending.
    [0044] Optionally, the application of the water-repellent varnish is carried out on both sides of the paper support. In this way, a greater surface tension is achieved in the coating layers that keeps the fibers of the paper support without curving in widths less than 19 cm, having a greater barrier against the entry of moisture to the support and its possible absorption by part of the fibers of said support.
    [0046] Preferably, the paper support includes recycled paper in a percentage greater than 95%. This allows the use of recycled raw material, with a consequent better management of the resources involved in the production of said closing sheet.
    [0048] According to a second aspect, the present invention proposes a method of manufacturing a closure sheet for wound products with a transverse tear strip, as may preferably be indicated in the previous characteristics of the present description of the invention.
    [0050] This method is characterized in such a way that the manufacturing procedure combines in a single stage, continuously, without performing the function of rewinding between them, the sub-stages corresponding to the division of the width of the original coil into two or more new coils, to pass, at least one of said coils created, to a module for applying the self-adhesive tear strip, passing the content of the new divided coil that will form the closure sheet, through a pressure roller after the longitudinal cut, as well as by a pressure roller before and / or after said application module.
    [0052] This unification of stages, not known in the state of the art, makes it necessary, as has experimented for the correct implementation of the application, the use of pressure rollers to maintain tension between the longitudinal cut and the application module of the tear strips, avoiding in the same way possible problems of lateral alignment, which can occur after the cutting and connection with said strip application module.
    [0054] This process has the difficulty of applying the transverse tear strip in a continuous longitudinal displacement process, whereby the timing in the application of the tear strip is essential. Correct synchronization is advantageously achieved by placing a pressure roller posterior to the longitudinal cutting module, as well as prior and / or posterior to said module for applying the tear strip.
    [0056] In the present specification, longitudinal cutting is understood as cutting to a specific width of the original reel sheet, to give rise to two or more new reels of the same length, but less width than the original one.
    [0058] This allows saving production times since it is avoided having a rewind of the new coil generated by the longitudinal cut of the original coil, between said cut and the stage of application of the tear strip, with the consequent transfers, loading and re-tensioning of the new coil.
    [0060] Preferably, the method has a previous stage of conditioning the recycled paper support that will later form the original coil, in which at least one of its faces is varnished with water-repellent varnish, so that after drying it can be wound I have introduced a posteriori in the stage of cutting and application of tear strip.
    [0062] This previous stage is considered prior to the generation of the original coil, there being a discontinuity in the process between said application of the varnish that allows to eliminate the curving of the closing sheet created with a recycled paper support.
    [0064] In a possible embodiment of the invention, each one of the new coils created by cutting the original coil, passes before its rewinding through a module for applying the tear strip, prior to the rewinding of each of said new coils .
    [0066] This configuration implies that the procedure executes both the longitudinal cutting process and the application of the tear strip to each of the new coils created by said cut, ending in the rewinding of each new coil already with the tear strip applied.
    [0068] According to a third aspect, the present invention proposes a machine for manufacturing the closing foils of wound products that executes the manufacturing method indicated in the present description with the above characteristics.
    [0070] This machine is characterized in that it has at least one module for longitudinal cutting of the original coil according to the width pre-established by the user, with at least one module for applying a tear strip, without there being a rewinding element between They, where after cutting and before and / or after the tear strip application module, there is at least one pressure roller through which the new cut coil is made to pass.
    [0072] This machine allows the realization of the two stages, the longitudinal cut and the application of the tear strip, so that it does not need an intermediate rewinding that creates the discontinuity of the process to take the new coil created to an application machine of tear strips.
    [0074] Preferably, the machine has as many modules for applying the tear strip as new cut coils result from the longitudinal cutting of the original coil. This modular configuration allows the machine to be expanded in a modular way to correspond with a module of application of the tear strips to each division that is made of the original coil, in order to have a rewound finish with applied retention strips, for each division created from said original coil.
    [0076] Also preferably, the machine has additional pressure rollers, at least at the entrance of the cutting module, which would add to the effect of the pressure rollers located after the cutting module, as well as the pressure roller located before and / or after the tear strip application module. This configuration makes it possible to maintain the tension of each of the new coils, as well as the lateral alignment prior to the application of the tear strip and, therefore, to be able to perform the synchronized application of the tear strips.
    [0077] Brief description of the figures
    [0079] For a better understanding of what has been explained, some drawings are attached in which, schematically and only as a non-limiting example, a practical case of embodiment is represented.
    [0081] Figure 1 is a schematic plan view of a closing sheet from its rear, whereby the tear-off self-adhesive strip is applied.
    [0083] Figure 2 is a schematic plan view of a closure foil that wraps a reel of garbage bags.
    [0085] Figure 3 is a schematic view of the machine that performs the step of longitudinal cutting of the original coil and the step of applying the tear strip to each new coil created, with its subsequent rewinding upon application of said tear strip. In this side elevation view, the passage of the separated partitions from the cutting module coincides in the same graphical line, as can be seen in its supply to each application module of the tear strip, as well as in the output of each module towards the rewinding, and in the existence of two coils installed on each rewinding axis, which effectively separate the process of the four partitions from their cut in the initial cutting module.
    [0087] Description of a preferred embodiment
    [0089] Next, various embodiments of the closure sheet for wound products are described, as well as the method of manufacturing a sheet like the previous one and the machine that executes the procedure for obtaining said closure sheet, referring to the figures listed above.
    [0091] As shown in Figures 1 and 2, the closing sheet (10) of wound products, such as rolls of garbage bags (20), as corresponds to the present embodiment, is formed by a support (11) on which a tear strip (12) placed transversely to the wrapping direction of the roll of bags (20) is applied, on its inner face with respect to the product (20) that it wraps.
    [0093] This closing sheet (10) incorporates means for closing the sheet on itself to be able to hold it and the whole. In this embodiment, it is achieved by means of a layer of adhesive applied to the entire sheet that activates its fixing capacity with water. whereby, in the subsequent process of closing the wound product, the closing end (13) is wetted on the same sheet (10).
    [0095] The tear strip (12) has a breaking strength and a clamping force to the support greater than the resistance to transverse breaking of the support (11), in order to thus allow the support (11) to be cut by the stretching of said strip (12) in the transverse direction dividing the sheet (10) into two parts and allowing the opening of the wound bag roll (20).
    [0097] The support (11) is made up of 95% recycled paper, with the rest of the additive components used of the biodegradable type. To this support (11) a layer of water-repellent varnish is applied on one of its faces, which gives the support greater surface tension, preventing the entry of moisture to the support and, in this way, reducing the bending of the fibers by effect of moisture absorption.
    [0099] Alternatively, the support (11) can comprise a composite of recycled paper without additives of the biodegradable type.
    [0101] Also alternatively, the composition of the recycled paper of the support is from 75% of the total of the support material.
    [0103] Similarly, in another embodiment, an application of the varnish could be provided on both sides of the support (11).
    [0105] The manufacture of said sheet (10) is carried out by a method that is executed on a machine (100) specially designed for this purpose. The method starts from an original coil (101) of a width in which multiple closure sheets (10) are contained together.
    [0107] The original reel (101) with the support (11) already varnished and printed with the graphics associated with the final closing sheet (10) are arranged in the machine (100) which will run continuously, without performing the rewind function between them, the division of the width of the original coil (101) into four partitions (102) of width corresponding to each closing sheet (10), in this case 15 cm.
    [0109] Each one of these new longitudinal partitions (102) are made to pass before their individual rewinding, through a module (103) for applying the self-adhesive tear strip (12), passing through a pressure roller (104) in such a way after cutting module (110) and by another roller (105) after said application module (103). In this way, to work continuously, there are as many application modules (103) as partitions (102) are made from the original coil (101).
    [0111] Alternatively, a machine (100) can have a single module (103) for applying the tear strip (12), so that at least one of the partitions (102) would finish the longitudinal cutting process and application of the tear strip (12) continuously, while the other partitions would be rewound to make the process discontinuous.
    [0113] In order to maintain the tension of each of the partitions (102) as well as their alignment, the machine has pressure rollers (106) prior to entering the cutting module (110), as well as prior to the application of the tear strip (12).
    [0115] Alternatively, more pressure rollers may be provided to help maintain tension and alignment of the partition (102) divided from the width of the original coil (101).
    [0117] Although reference has been made to a specific embodiment of the invention, it is evident to an expert in the field that the closure film for wound products, as well as the method of manufacturing a film such as the previous one and the machine that allows Executing said described method is susceptible to numerous variations and modifications, and that all the mentioned details can be replaced by other technically equivalent ones, without departing from the scope of protection defined by the attached claims.
    权利要求:
    Claims (9)
    [1]
    1. Closure sheet for wound products, of which they are arranged around a wound product closing on itself and which has at least one tear strip transverse to the envelope arrangement on the wound products, characterized by the fact that that the closing sheet (10) is formed by a support (11) comprising a composition of recycled paper or recycled paper and biodegradable material, in a percentage of said compositions of at least 75% of the total support material, wherein the paper support (11) has, at least, one layer of water-repellent varnish coating on one of its faces.
    [2]
    2. Closure film for wound products, according to claim 1, wherein the water-repellent varnish is applied to both sides of the paper support (11).
    [3]
    3. Closure foil for wound products, according to claim 1, wherein the paper support (11) is recycled paper in a percentage greater than 95%.
    [4]
    4. Method of manufacturing a closure sheet for wound products with a transverse tear strip, as indicated in claims 1 to 3, characterized in that the manufacturing process combines in a single stage, without performing the function of rewinding between them, the division of the width of the original coil (101) into two or more new coils (102), to pass, at least one of said created coils (102), to an application module (103) of the self-adhesive tear strip (12), passing the content of the new divided coil (102) that will form the closure sheet (10), through a pressure roller (104) after the longitudinal cut (110), thus as by a pressure roller (105) before and / or after said application module (103).
    [5]
    5. Manufacturing method, according to claim 4, wherein the method has a previous stage of conditioning the recycled paper support that will later form the original coil (101), in which at least one of the their faces with water-repellent varnish, so that after drying they are wound up, I have subsequently introduced them in the cutting stage (110) and application of the tear strip (12).
    [6]
    6. Manufacturing method, according to claim 4, wherein each of the new reels (102) created by cutting the original reel (101), passes before being rewound by an application module (103) of the tear strip (12), prior to rewinding the each of said new coils (102).
    [7]
    7. Machine for the manufacture of closing films of wound products that executes the procedure indicated in claims 4 to 6, characterized in that the machine (100) has at least one cutting module (110 ) longitudinal of the original coil (101) according to the width preset by the user, with at least one application module (103) of a tear strip (12), without there being a rewinding element between them, where in a way After cutting (110) and before and / or after the application module (103) of the tear strip (12), there is at least one pressure roller (104, 105) through which it passes the new coil (102) cut off.
    [8]
    Manufacturing machine, according to claim 7, wherein the machine has as many application modules (103) of the tear strip (12) as new cut coils (102) result from the longitudinal cut (110) of the original coil (101).
    [9]
    Manufacturing machine according to any of claims 7 or 8, wherein the machine has additional pressure rollers (106), at least at the input of the cutting module (110).
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    同族专利:
    公开号 | 公开日
    ES2787723B2|2021-02-19|
    EP3725702A1|2020-10-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB1409246A|1971-10-09|1975-10-08|Barnes Ltd James|Adhesive-backed tapes|
    ES2134582T3|1995-09-28|1999-10-01|Policarta Srl|MACHINE AND PROCESS FOR THE FORMATION OF A CONTINUOUS COMPOSITE TAPE FOR THE MANUFACTURE OF ENVELOPES INTENDED FOR FOOD PRODUCTS AND THE TAPE AND ENVELOPE OBTAINED IN THIS WAY.|
    DE10016097C1|2000-03-31|2001-06-21|Dollhopf Peter|Label for facilitating roll exchange in roll offset printing enables commencement of new roll to be applied to end of expiring roll|
    US20030158025A1|2002-02-14|2003-08-21|Lintala Edward W.|Pull tab device for a dunnage machine stock supply|
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    GB372262A|1930-01-22|1932-05-05|Naamlooze Vennootschap Papierf|A cover for a roll of toilet paper|
    US4339294A|1979-12-19|1982-07-13|Ciba-Geigy Ag|Method and apparatus for making reeled strip material|
    US5062582A|1989-08-02|1991-11-05|International Paper Company|Apparatus and method for producing semi-converted diskette liners|
    US5464168A|1994-02-10|1995-11-07|Spencer Industries, Inc.|Apparatus for slitting belt|
    EP2357148A4|2008-12-10|2012-09-05|Mimcord S A|Method and system for obtaining paper strips and/or tapes|
    CA2821157A1|2012-07-13|2014-01-13|Atlantic Coated Papers Ltd.|Protective wrapper for rolls and method for wrapping a roll using the same|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201930340A|ES2787723B2|2019-04-15|2019-04-15|COILED PRODUCTS CLOSURE SHEET, MANUFACTURING METHOD OF THE SAME AND MACHINE THAT EXECUTES IT|ES201930340A| ES2787723B2|2019-04-15|2019-04-15|COILED PRODUCTS CLOSURE SHEET, MANUFACTURING METHOD OF THE SAME AND MACHINE THAT EXECUTES IT|
    EP20168797.7A| EP3725702A1|2019-04-15|2020-04-08|Closing sheet for wound products, manufacturing method for same and machine that executes said method|
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