EP3363626A1 - Verfahren zur herstellung eines beutels - Google Patents

Verfahren zur herstellung eines beutels Download PDF

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Publication number
EP3363626A1
EP3363626A1 EP18155790.1A EP18155790A EP3363626A1 EP 3363626 A1 EP3363626 A1 EP 3363626A1 EP 18155790 A EP18155790 A EP 18155790A EP 3363626 A1 EP3363626 A1 EP 3363626A1
Authority
EP
European Patent Office
Prior art keywords
web
bag
blade
reference mark
mouth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18155790.1A
Other languages
English (en)
French (fr)
Inventor
David Luffman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Paranova Print and Packaging Ltd
Original Assignee
Coveris Flexibles UK Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Coveris Flexibles UK Ltd filed Critical Coveris Flexibles UK Ltd
Publication of EP3363626A1 publication Critical patent/EP3363626A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/006—Controlling; Regulating; Measuring; Safety measures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/34—End- or aperture-closing arrangements or devices with special means for indicating unauthorised opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5827—Tear-lines provided in a wall portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/001—Flexible containers made from webs by folding webs longitudinally
    • B31B2155/0014—Flexible containers made from webs by folding webs longitudinally having their openings facing transversally to the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/812—Applying patches, strips or strings on sheets or webs
    • B31B70/8123—Applying strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/88—Printing; Embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2401/00—Tamper-indicating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2575/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D2575/52—Details
    • B65D2575/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D2575/586—Opening or contents-removing devices added or incorporated during package manufacture with means for reclosing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/04—Articles or materials wholly enclosed in single sheets or wrapper blanks
    • B65D75/20—Articles or materials wholly enclosed in single sheets or wrapper blanks in sheets or blanks doubled around contents and having their opposed free margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding

Definitions

  • the present invention relates to a method of manufacturing a bag.
  • the present invention also relates to a bag, and to an apparatus configured to manufacture a bag.
  • Plastics bags of a material such as polyethylene are often used for such applications, as they are lightweight and disposable.
  • Such plastics bags are commonly manufactured by folding a web of film into the required shape, creating desired features such as cuts or printed designs, and cutting and welding the web into individual bags.
  • a mouth through which a sample can be placed in the bag is created by making a cut in the web, or by folding the web in such a way as to leave a suitable opening. Once a sample has been placed into a bag the mouth is sealed to protect the contents and prevent contamination, for example with an adhesive strip provided on a carrier tape attached to the bag.
  • the mouth extends across the bag to its edges, it can be difficult to entirely seal it, as adhesive cannot wholly surround the mouth at the edges of the bag. It is known, therefore, to prevent the mouth extending to the very edges of the bag by welding the bag at the ends of the opening cut. The mouth does not then extend to the edges of the bag.
  • the carrier tape or closure flap can be adhered to the obverse face of the bag around all sides of the mouth, thus reducing the chance of leakage or contamination of the contents, and providing a leak resistant container for enclosing items such as sample fluids or other, solid items that may leak fluid.
  • welds must be sufficiently flat to ensure that the adhesive strip can form a continuous bond around the mouth without creating channels through which liquid could escape.
  • Welding the ends of the cut is an additional step in the manufacturing process, so that the process is slower, more complex, and creates additional waste. Welding the ends of the cut can allow tampering with a sealed bag to go unnoticed, as it may be possible to open a bag (e.g. by cutting) at the weld to gain access to the contents, then to re-weld the bag to cover the opening.
  • the present invention seeks to overcome, or at least mitigate, the problems of the prior art.
  • a method of producing a bag or a series of bags comprising the steps of:
  • Adhesive can therefore surround the mouth, creating a seal.
  • the perforated cut may not extend to within 7mm of either side edge, or may not extend to within 12mm of either side edge.
  • the method may further comprise the step of e) applying adhesive to the web.
  • the method may further comprise the step of f) printing a reference mark on the web.
  • the method may further comprise the step of g) applying a tamper evident feature to the web.
  • Including a tamper evident feature advantageously allows the user to tell if the bag has been opened, or if an attempt to open the bag has been made.
  • the apparatus comprises a drive system for continuously feeding a web of plastics material along the apparatus from an input end thereof; a castellated rotary blade and a means of engagement/disengagement therefor; and a cutting and welding station for cutting and welding a bag from the web.
  • the apparatus may further comprise an adhesive station for applying adhesive to the web.
  • the apparatus may further comprise a printing station for printing a reference mark on the web.
  • a bag of plastics material comprising obverse and reverse walls with side edges; and a mouth defined by the obverse wall.
  • the mouth comprises a perforated cut extending across the obverse wall substantially perpendicular to the side edges, and wherein the cut does not extend to either side edge.
  • the perforated cut may not extend to within 7mm of either side edge, or may not extend to within 12mm of either side edge.
  • the bag may further comprise an adhesive strip configured to overlay the mouth on all sides.
  • the bag may further comprise a tamper evident feature, which may be tamper evident ink.
  • the bag may be of polyethylene.
  • FIGS 1 and 2 show a bag generally indicated at 10.
  • the bag 10 is for use in protecting and transporting food, medical and other samples, police evidence and the like.
  • the bag 10 has opposing obverse 12 and reverse 14 walls of plastics material such as polyethylene.
  • the obverse 12 and reverse 14 walls are joined at opposing side edges 16, and at top 18 and bottom 20 edges, so forming a pouch.
  • the bag 10 is welded at the side edges 16 and at the top 18.
  • the material is folded to form the bottom edge 20.
  • all of the edges may be formed by welding, or an alternative edge may be formed by folding.
  • the welds are formed at the outmost part of the edges.
  • the welds are formed inward of the outermost part of the edges, or in both locations.
  • the obverse wall 12 defines a mouth 22 that provides access to the bag 10 so that an item can be placed inside the pouch.
  • the mouth 22 is a perforated cut 24 that extends across the obverse wall 12 substantially perpendicular to the side edges 16.
  • the perforated nature of the cut 24 leaves ties 26 between the perforations, so that the ties 26 hold the obverse wall 12 together at the mouth 22.
  • the ties 26 prevent the mouth 22 from unwanted opening, so that the bag 10 does not become contaminated prior to use. This is of particular importance in bags used for purposes such as police evidence and medical samples, especially when a liquid is to be contained within the bag.
  • the user tears the ties 26 so that the mouth 22 is opened.
  • the width of the ties 26 can be changed depending on the desired tear strength needed to open the mouth 22, i.e. the wider the ties 26, the higher the force required for the mouth 22 to be opened.
  • the bag 10 can be sealed.
  • An adhesive strip 28 is provided for sealing the bag 10.
  • the adhesive strip 28 is provided on a carrier tape 30 adjacent the mouth 22, the tape 30 being configured to be folded over the mouth 22 so that the adhesive strip covers the mouth 22.
  • the carrier tape is located on the opposite side of the mouth.
  • the mouth 22 does not extend the full width of the obverse wall 12, so that an unbroken portion 32 is left at either end of the mouth 22.
  • the adhesive strip 28 extends beyond the ends of the mouth 22. When the tape 30 is folded down to secure the bag 10, the adhesive strip 28 therefore surrounds the mouth 22, extending over the portions 32 at either end of the mouth 22, so that a seal is formed around the mouth 22. Leakage from the bag 10 is thus inhibited.
  • the adhesive strip 28 of this embodiment is configured to extend beyond the mouth 22 by at least approximately 7mm at each end. In an alternative embodiment, the adhesive strip is configured to extend beyond the mouth by at least approximately 5mm at each end. In a further alternative embodiment, the adhesive strip is configured to extend beyond the mouth by at least approximately 12mm at each end.
  • One suitable adhesive is hot melt pressure sensitive adhesive such as Beardow Adams A15 2016.
  • Other suitable adhesives can be used, such as solvent based adhesive, cold applied adhesive or UV cured adhesive.
  • the adhesive strip 28 is covered with a release liner 34 of a material such as metallised polyethylene terephthalate or other suitable material in order to protect against unwanted adhesion before the bag 10 is in use.
  • the protective release liner 34 is easily peeled away from the adhesive strip 28 at the required time.
  • the adhesive strip has mitred corners in order to aid removal of the release liner.
  • adhesive may be applied around the mouth and covered with a protective strip, then exposed before sealing so that a part of the bag can be folded down over the adhesive.
  • a separate adhesive tape can be used.
  • Tamper evident features can be included with the adhesive strip 28.
  • specialist tamper evident ink may be printed on the obverse wall 12 around the mouth 24, where the adhesive of the adhesive strip 28 will be applied, e.g. as described in GB2488507 , or other specialist coatings or can be applied.
  • the adhesive carrier tape may be treated with specialist tamper evident ink, e.g. as described in GB2279936 .
  • other tamper evident features can be used, such as die cuts that are configured to fail when the carrier tape is adjusted, frangible materials, or laminates that are configured to de-laminate and so show tamper evidence.
  • the bag 10 is intended for single use. When the bag 10 is no longer needed, e.g. if a sample is to be removed from the sealed bag 10, the bag is torn or cut open.
  • the bag 10 is manufactured as follows, with reference to the apparatus shown in Figure 3 .
  • a web 40 of polythene or other suitable material is fed from a roll 42 at an input end 43 of a conversion line or apparatus 44.
  • a drive system 45 controls the roll 42 and the speed of flow of the web 40.
  • the web 40 is passed through a printing station 46, where a reference mark 48 is printed on to the bag 10.
  • the reference mark 48 is printed on the obverse wall 12.
  • the reference mark is elsewhere on the bag, e.g. on the reverse wall.
  • the reference mark 48 is shown in Figures 1 and 2 as a rectangular shape, as an example only.
  • the reference mark 48 can be some other shape, or can be a word or pattern that is otherwise included in the design of the bag.
  • the reference mark is a contrast in a colour or colours printed on the bag.
  • the printed web 40 then passes under a rotary blade 52, which defines the perforated cut 24.
  • a rotary blade 52 rather than a knife blade advantageously increases production efficiency.
  • a rotary blade wears at a reduced rate in comparison to a knife blade.
  • Use of a rotary blade therefore increases the blade lifetime and so reduces the machine stoppage time required to replace blades.
  • a roller 53 of hardened steel or some other suitable material support the web 40 beneath the blade 52. The roller advantageously reduces dragging of the web 40 as it is cut by the blade 52.
  • FIG. 4 shows the blade 52.
  • the blade 52 is castellated so that the perforations of the cut 24 can be defined. That is, the blade 52 has cutting teeth 54 separated from one another. When the blade 52 engages the web 40, cuts are made by the teeth 54 and the ties 26 are left between the cuts.
  • Rotary blades with different geometry can be used to define ties 26 of different widths, in order to create a perforated cut of the required tear strength. That is, a blade with fewer teeth spaced further from one another will produce wider ties and a perforated cut of greater tear strength, or a blade with wider teeth closer together will produce narrower ties and a perforated cut of lesser tear strength.
  • Engagement of the blade 52 with the web 40 is controlled by a piston 56.
  • the piston 56 of this embodiment is pneumatic, although other suitable methods of operation can be used.
  • the blade 52 is operated by being lowered to engage the web 40, or raised to disengage the web 40.
  • the movement of the web 40 causes the blade 52 to be rotated, and so make the cut 24.
  • Rotation of the blade 52 is aided by the roller 53.
  • rotation of the blade is powered, e.g. by an electric motor.
  • the blade 52 is intermittently engaged with the web 40 to define the perforated cut 24, then disengaged by the piston 56 to define the end of the cut 24, so that the unbroken portions 32 are left at either end of the cut 24.
  • a sensor 58 detects the reference mark 48 and an associated control system (not shown) activates the piston 56 to engage or disengage the blade 52 accordingly.
  • the reference mark 48 indicates when the blade 52 is to be operated to disengage from the web 40, i.e. where the perforated cut 24 is to be ended.
  • the control system acts to disengage the blade 52.
  • the control system activates the piston 56 to engage the blade 52 with the web 40, so that the cut 24 is started.
  • the sensor 58 detects the subsequent reference mark 48, the blade 52 is disengaged, and so on, repeating the process along the length of the web 40.
  • the reference mark 48 is shown in an example location in Figures 1 and 2 . In an alternative embodiment the reference mark is located elsewhere on the web, and the sensor is correspondingly located.
  • the length of web 40 that passes along the apparatus 44 is measured using a shaft encoder.
  • the encoder rotates as the web 40 moves, and emits a known quantity of electronic pulses as it rotates.
  • the distance rotated by the encoder, and thus the amount of web 40 that has passed beneath the blade 52, can therefore be calculated.
  • the control system engages the blade 52 with the web 40 according to the number of pulses emitted.
  • the control system engages the blade 52 after a set amount of time has passed, where the web 40 is travelling at a predetermined speed, i.e. so that the length of web that has passed can be calculated.
  • control system is configured to engage the blade with the web when the reference mark is detected by the sensor, and to disengage the blade from the web after a predetermined length of web has passed.
  • a second reference mark indicates when the blade is to engage the web.
  • the web 40 passes through an adhesive station 60 and the adhesive strip 28 is applied.
  • the release liner 34 is attached to the adhesive strip 28.
  • the web 40 is folded, and passes through a cutting and welding station 62 where an individual bag 10 is severed from the web 40 by a blade.
  • the bag 10 is folded, and a heated blade is used to simultaneously cut and weld the side edges 16.
  • the top edge 18 is also welded.
  • cutting of the side edges and welding the bag takes place in separate steps.
  • printing takes place on a separate apparatus line. Once printed, the web is rolled and transferred to the apparatus line for the application of adhesive and creation of perforated cuts.
  • the web is supplied already folded, as a tube, or as a double sheet, allowing two adjacent bags to be produced simultaneously.
  • the apparatus includes a roller adjacent the rotary blade, the roller being configured to separate the obverse and reverse walls of the bag so that the blade cuts through only one of the walls.
  • the roller is mounted with an axis substantially parallel to that of the rotary blade.
  • the roller is mounted with an axis substantially perpendicular to that of the rotary blade.
  • a plate is used to separate the obverse and reverse walls of the bag whilst cutting takes place.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Bag Frames (AREA)
EP18155790.1A 2017-02-08 2018-02-08 Verfahren zur herstellung eines beutels Withdrawn EP3363626A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1702099.1A GB2559734A (en) 2017-02-08 2017-02-08 A method of producing a bag

Publications (1)

Publication Number Publication Date
EP3363626A1 true EP3363626A1 (de) 2018-08-22

Family

ID=58462281

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18155790.1A Withdrawn EP3363626A1 (de) 2017-02-08 2018-02-08 Verfahren zur herstellung eines beutels

Country Status (2)

Country Link
EP (1) EP3363626A1 (de)
GB (1) GB2559734A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021092992A1 (zh) * 2019-11-13 2021-05-20 新兴印刷有限公司 包装用纸膜袋制作工艺

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157652A (en) * 1984-04-10 1985-10-30 Roeder Ind Holdings Plastics bags and methods of making the same
US6196716B1 (en) * 1999-04-26 2001-03-06 Amko Plastics Inc. Side seal tamper indicating bag
EP1707497A1 (de) * 2005-03-29 2006-10-04 Amcor Flexibles Europe Verpackung mit mindestens einer Tasche
US20130102449A1 (en) * 2011-10-19 2013-04-25 Jim Graboski Perforation scoring on extruded film
US20130308883A1 (en) * 2012-05-15 2013-11-21 Automated Packaging Systems Reclosable bag and methods of forming and using same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5518559A (en) * 1993-08-12 1996-05-21 Cmd Corporation Method and apparatus for registration of a seal on a plastic bag
JPH09201886A (ja) * 1996-01-29 1997-08-05 Totani Giken Kogyo Kk 製袋機の袋切断装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157652A (en) * 1984-04-10 1985-10-30 Roeder Ind Holdings Plastics bags and methods of making the same
US6196716B1 (en) * 1999-04-26 2001-03-06 Amko Plastics Inc. Side seal tamper indicating bag
EP1707497A1 (de) * 2005-03-29 2006-10-04 Amcor Flexibles Europe Verpackung mit mindestens einer Tasche
US20130102449A1 (en) * 2011-10-19 2013-04-25 Jim Graboski Perforation scoring on extruded film
US20130308883A1 (en) * 2012-05-15 2013-11-21 Automated Packaging Systems Reclosable bag and methods of forming and using same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021092992A1 (zh) * 2019-11-13 2021-05-20 新兴印刷有限公司 包装用纸膜袋制作工艺

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Publication number Publication date
GB2559734A (en) 2018-08-22
GB201702099D0 (en) 2017-03-22

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