EP3246266B1 - Verfahren zur herstellung eines seitenfaltenbeutels sowie flachliegender, unbefüllter seitenfaltenbeutel - Google Patents

Verfahren zur herstellung eines seitenfaltenbeutels sowie flachliegender, unbefüllter seitenfaltenbeutel Download PDF

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Publication number
EP3246266B1
EP3246266B1 EP16170007.5A EP16170007A EP3246266B1 EP 3246266 B1 EP3246266 B1 EP 3246266B1 EP 16170007 A EP16170007 A EP 16170007A EP 3246266 B1 EP3246266 B1 EP 3246266B1
Authority
EP
European Patent Office
Prior art keywords
bag
gusseted
front walls
gussets
film
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.)
Active
Application number
EP16170007.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3246266A1 (de
Inventor
Alfons Kruse
Detlef Stöppelmann
Jens Kösters
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.)
Mondi AG
Original Assignee
Mondi AG
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 Mondi AG filed Critical Mondi AG
Priority to PL16170007T priority Critical patent/PL3246266T3/pl
Priority to EP16170007.5A priority patent/EP3246266B1/de
Priority to ES16170007T priority patent/ES2724424T3/es
Priority to US15/594,995 priority patent/US20170334608A1/en
Publication of EP3246266A1 publication Critical patent/EP3246266A1/de
Application granted granted Critical
Publication of EP3246266B1 publication Critical patent/EP3246266B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/10—Bags or like containers made of paper and having structural provision for thickness of contents with gusseted sides
    • 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
    • B31B70/16—Cutting webs
    • B31B70/18—Cutting webs longitudinally
    • 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
    • B31B70/262—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement
    • B31B70/266—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement involving gusset-forming
    • 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
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2516—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener
    • B65D33/2533—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener the slide fastener being located between the product compartment and the 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
    • 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
    • B65D75/008—Standing pouches, i.e. "Standbeutel"
    • 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
    • B65D75/5816—Opening or contents-removing devices added or incorporated during package manufacture for tearing a corner or other small portion next to the edge, e.g. a U-shaped 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
    • B31B2155/0012—Flexible containers made from webs by folding webs longitudinally having their openings facing in 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
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/002—Flexible containers made from webs by joining superimposed webs, e.g. with separate bottom webs
    • 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
    • B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/18—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps
    • B65D33/20—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps using pressure-sensitive adhesive
    • 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
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • 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
    • B65D75/5861—Spouts
    • B65D75/5866—Integral spouts

Definitions

  • the invention relates to a method for producing a gusseted bag, wherein a material web of a bag film is guided in a direction of production, wherein folded gusset tube with a first front wall, a second front wall and arranged therebetween, the front walls connecting side gussets is formed by folding the bag film, and wherein the side gusset tube individual gusseted bags are separated.
  • the invention further relates to a flat, unfilled gusseted bag according to the preamble of claim 8, which can be formed in particular by the aforementioned method.
  • the gusseted bag is usually formed from plastic film, wherein in particular multilayer laminated films for the production come into consideration, in which case the films on an inside of the gusseted bag have a heat-sealable inner layer and an outer surface of the side gusseted bag forming outer layer, wherein in a laminated film and an internal Overprint may be provided, which is produced before laminating.
  • one of the two gussets can be provided with the reclosing device, with which the gusset can be fixed and closed in a folded state between the front walls, wherein the gusset can be folded outwardly by opening the reclosing device to a chute form.
  • a transversely extending top seal seam is provided above the reclosing device in a filled gusseted bag, the must first be partially demolished, cut or peeled for a first opening with a corresponding head section.
  • EP 1 620 321 B1 Side gusseted bags as well as methods of manufacture are made of EP 1 620 321 B1 .
  • gusseted bags have a reclosure with a single self-locking reclosure strip on the inside of the bag at a gusset and adjacent the gusset also extends to the two front walls and which connects the gusset with the two front walls. Starting from a center line of the gusset one wing, so one half of the corresponding gusset with the first front wall and the other half of the gusset is connected to the second front wall.
  • the length of the reclosure strip on the two front walls can be different according to the prior art as well as in the context of the invention.
  • the reclosing strip on the front walls can also extend beyond the corresponding gusset, so that then adjacent to the gusset, the two front walls are directly connected to each other, whereby a larger discharge opening is provided.
  • the reclosure extends only over part of the entire width of the front walls.
  • a connection line extending in the longitudinal direction of the bag or in the transverse direction of the bag, in particular a heat-sealing seam, can be provided laterally to the reclosing strip in order to delimit the opening.
  • the front walls and the side folds are formed by folding from a single film web. From a gusseted tube with the front walls and the side gusses individual gusseted bags or corresponding blanks are then separated, each having a reclosing device.
  • gusseted pouches are then separated from the gusseted tubing, wherein a filling can take place directly in this case, which is then a so-called FFS process (Form Fill and Seal).
  • FFS process Form Fill and Seal
  • prefabricated gusseted bags can first be formed which are not yet closed on at least one side and can then initially be stored and transported to a packaging location. Such gusseted bags are then filled separately and sealed.
  • a bag string of successive, connected bag blanks is formed.
  • a first film web is guided in the production direction.
  • a film strip is fed, wherein the edges of the film strip are folded over on a central portion.
  • the edges are usually the same width, with a gap remaining between the edges after folding.
  • pieces of film strips are applied at a uniform distance transversely to the production direction (ie along the bag longitudinal direction) on the first film web before a second film web is fed in the production direction, with which the first film web and the pieces of film strips are covered.
  • a lower edge of the gusseted bag can be closed with a transverse sealing seam, but then a uniform placement of the gusseted bag is not possible. Rather, such a gusseted bag tends during filling, its transport and its storage to a tilt when it is to be placed on its lower portion as a floor.
  • a method for producing a gusseted bag wherein a web of material is supplied to a bag film in a production direction, wherein folds of the bag film, a gusseted tube with a first front wall, a second front wall and arranged therebetween, the front walls connecting gussets is formed and wherein of the gusseted tube individual gusseted bags are separated.
  • the bag film is for each gusseted bag in creates a transverse weakening line which extends in the subsequently formed gusseted tube over both gussets and the first front wall which is arranged between the side gussets.
  • the first front wall is raised and at least partially folded, whereby the underlying second front wall and the side gussets are exposed in sections.
  • a separate foil section is prefixed to the folded-over section of the first front wall and the second front wall as well as to the side folds, before the folded-over section is then folded back again. Finally, the bottom fold forming separate film section is completely sealed before then a separation takes place.
  • the invention has for its object to provide a method for producing a gusseted bag, the gusseted bag should have a good stability and a high-quality appearance. Furthermore, it is also intended to specify a flat, unfilled gusseted bag with a reclosing device, which can be produced in particular in the method according to the invention.
  • the invention and solution of the problem are a method for producing a gusseted bag according to claim 1 and a flat, unfilled gusseted bag according to claim 8.
  • the gusseted bag is usually printed on all bag surfaces, ie on its front walls, its side gussets and also the separate film section as a bottom on the outside of the bag or provided with a visible on the outside of the bag inside print.
  • the inner surfaces of the gusseted bag are formed by a sealable layer, which is usually monochrome, in particular white.
  • the foil section and the lower edges of the front walls and gussets are trimmed within the scope of the invention, this trimming preferably taking place simultaneously with the separation of individual gusseted bags from the gusseted tube.
  • the method according to the invention is carried out in such a way that, when the folded-over section is folded back, the second connecting seams, with which the separate film section is connected to the side folds, run transversely parallel to the first connecting seams, for which purpose the folding back is suitably controlled got to.
  • the separate film portion When folded back along a straight line, the separate film portion would extend along the first transverse seams and along the second longitudinal seam joints of the gusseted tube, including, as appropriate, trimming to avoid “flare” in both the transverse and longitudinal gusseted tubing would.
  • the folding back is performed and controlled so that the gussets are inserted over their entire length again between the front walls, whereby then the separate film section in the gussets multilayer is superposed, so that then the lower end of the gussets again in line with the lower ends of the front walls, so that there also the first connecting seams and the second connecting seams together by a single cut in Transverse can be cropped.
  • This pruning is also called pruning.
  • a double cut along two transverse cutting lines is performed below the separate foil section provided as a bottom.
  • a first cut line of the double cut forms the upper edge of the subsequent bag.
  • the distance between the two cutting lines of the double cut can be, for example, between 1 mm and 20 mm, in particular between 2 mm and 10 mm.
  • the incisions may conveniently be formed in the still flat web of material, but then in the folding then tearing must be prevented and the web is to be guided with appropriate care. In principle, it would also be conceivable to provide only a weakening line or perforation on the material web, which is then subsequently separated further.
  • the method it is provided that are arranged on the web at a uniform distance and at a uniform distance to the incisions transverse to the direction of production reclosing strip, which after forming the gusseted tube at one of the gussets and each over a part extend the two front walls, in which case under the According to the invention method of the gusseted bag described below is formed with a reclosure at the first gusset.
  • the reclosure strip expediently extends at the front walls at least over a width which corresponds to half the width of the associated gusset. In such an embodiment, only a connection of the two wings of the gusset with one of the front walls takes place. If the reclosure is carried out beyond the gusset area, the two front walls can also be connected directly to each other in certain areas.
  • the reclosure strip extends in all cases only over part of the front walls.
  • the method can also be used to attach carrying handles which are expediently arranged on the side fold which lies opposite the reclosable strip.
  • a heat-sealing seam may be provided, wherein such a heat-sealing seam is preferably formed in the region of one of the side edges.
  • all side edges can be provided with a heat-sealing seam in order to improve the stability of the side gusset bags that are formed. If the material web at a Side edge is welded to a circumferentially closed tube, supernatants can be provided there, which trimmed, that is cut off.
  • the first front wall is preferably folded over at a fold line spaced from the incision in such a way that the distance of the fold line from the incision corresponds approximately to half the width of the side fold.
  • the front wall is then folded as far as possible, whereby the exposed gusset, starting from a central crease line at an oblique angle of 45 ° to the outside.
  • the separate sheet section for forming a flat bottom for each gusseted bag is conveniently attached to the front panels and gussets with heat seal sutures.
  • the sealing at the gussets can be done easily on the flattened gusseted tube.
  • the corresponding generation of a transverse sealing seam is preferably carried out in the raised state.
  • the invention is also a flat, unfilled gusseted bag with two opposite front walls, a first and a second gusset, which extend opposite each other along a bag longitudinal direction and each connect the two front walls together.
  • a reclosing device having at least one reclosable strip is provided, which is arranged in the region of the first gusset, only along a transverse direction of the bag extends over a portion of the width of the front walls and allows the folding out of the first gusset to form a resealable chute.
  • the flat-lying, unfilled gusseted bag is produced in particular by the manufacturing method described above, wherein a separate film section is provided for forming a flat bottom, characterized in that the film section is connected via first heat-sealed seams to lower ends of the front walls and via second heat-sealing seams to lower ends of the gussets wherein the film portion is disposed between the front walls such that the first heat-sealing seams and the second heat-sealing seams are arranged parallel to each other along the bag transverse direction.
  • the gusseted bag according to the invention is characterized by a particularly advantageous handling. With the aid of the reclosing device at the first gusset this can after a first opening in a folded State are fixed, in which case the two wings of the first gusset are each attached to one of the two front walls. By loosening the reclosure then the gusset can be folded outwards to form a chute, so that then a particularly easy and accurate dosage is possible.
  • the gusseted bag can be emptied controlled by an inclination by a user, with just a precise removal of subsets is possible, in which case the remaining contents is protected by the reclosing device.
  • the gusseted bag may for example have a filling volume between 1 l and 50 l, in particular between 2 l and 30 l.
  • the gusseted bag is particularly suitable for receiving bulk materials such as pelleted pet food, detergent, cat litter, road salt and powdery or granular construction materials.
  • a top seal seam is usually provided above the reclosing device prior to initial opening, which seals the side gusset bag tightly.
  • a top seal is then torn off to expose the underlying recloser and allow the chute to fold out and reclosure.
  • the reclosing device comprises at least one reclosing strip, which preferably runs exactly in the transverse direction of the bag.
  • the reclosing device has a plurality of separate reclosing strips which are lockable with each other.
  • the reclosing device has a single, continuous and self-locking reclosable strip.
  • Such a reclosing strip can be particularly easily placed on a flat web of material during manufacture, in which case only folding of these reclosing strip in the desired position on the gusset is arranged.
  • the reclosing strip may have either continuous closure formations or a plurality of individual interlockable closure elements.
  • the reclosing strip may have either continuous closure formations or a plurality of individual interlockable closure elements.
  • the reclosing strip may have either continuous closure formations or a plurality of individual interlockable closure elements.
  • grooves, protrusions and hook-shaped curved strips which can be locked together or with themselves can be considered as continuous closure molding.
  • Corresponding structures can be extruded, for example, as a strand, wherein the closure formations are usually arranged on a heat-sealable support section or extruded in one piece with the heat-sealable support section.
  • Individual, lockable closure elements can be provided for example in the form of Velcro hooks, mushroom heads or the like.
  • the individual mushroom heads or Velcro hooks are usually so mobile, that they can penetrate at a pressure from the outside in an associated space and then lock there with similar closure elements.
  • the entire reclosure strip can not be easily pulled up from the dirt.
  • the front walls and the side folds are formed from a bag film, in particular a uniform bag film, wherein the front walls and the side folds can be folded from a uniform material web as described above.
  • the bag film usually has at least one heat-sealable inner layer and one outer layer, wherein the assignment of the inner layer and the outer layer relates to the arrangement of the bag film on the side-folding bag.
  • the inner layer thus forms the inner surface of the gusseted bag, while the outer layer forms the outer surface.
  • the inner layer is expediently well heat-sealable in order to close the pouch on the circumference, to be able to form longitudinal and transverse sealing seams and also to be able to fasten further devices such as the reclosing device by heat sealing.
  • polyolefins such as polyethylene (PE) and polypropylene (PP) and polyolefin copolymers
  • biodegradable plastics such as polylactic acid (PLA), polybutylene adipate terephthalate (PBAT) and polybutylene succinate (PBS) are also suitable as the heat-sealable material for the inner layer.
  • the outer layer is less heat sealable compared to the inner layer, for which the outer layer may have a higher melting or softening temperature. In a heat-sealing of the bag film is then achieved that although the inner layer - possibly through the outer layer therethrough - is melted, but without causing the outer layer is excessively deformed or loses its structure.
  • the outer layer may in particular be formed from polyester. A reduction in the tendency to melt in a heat seal can also be achieved by an orientation of the outer layer. For the outer layer therefore also oriented polyethylene terephthalate (OPET), oriented polyamide (OPA), oriented polypropylene (OPP) and oriented polylactic acid (OPLA) into consideration.
  • the outer layer may also be formed by a cellulose film.
  • a laminating film is used as the bag film, wherein a first film with the inner layer and at least one second film with the outer layer are bonded together by adhesive.
  • a first film with the inner layer and at least one second film with the outer layer are bonded together by adhesive.
  • Suitable for example, is a two-component adhesive based on polyurethane (2K-PUR).
  • 2K-PUR polyurethane
  • other intermediate layers may be provided, for example to increase the barrier effect.
  • a film layer of ethylene-vinyl alcohol copolymer (EVOH) may be provided a thin metal foil or a metallized film layer.
  • an internal printing is preferably also provided, which is applied to one of the joining surfaces of the films to be joined together before laminating.
  • the gusseted bag is expediently produced in a longitudinal method, wherein a material web of the bag film is first converted into a gusseted tube, from which individual side gusset bags are then separated.
  • the side edges formed between the side folds and front walls are formed as folded edges.
  • a longitudinal seal is expediently carried out. This can coincide with one of the side edges, so that then this side edge is not formed as a folding edge.
  • the edges of the material web can also be connected to one of the front surfaces by a longitudinal seam.
  • the production of longitudinal sealing seams at the side edges may be expedient in order to increase the dimensional stability and dimensional stability of the gusseted bag.
  • an outer edge may also be cut to improve the appearance.
  • An upper edge of the bag above the reclosing device is usually closed by a transverse sealing seam.
  • the side folds extend over the entire side gusseted bag from the flat bottom to the transverse seam at the upper edge of the bag, that is to say in the longitudinal direction of the bag. Further measures to shorten the gusset are then not necessary.
  • the gusseted bag can be provided with a carrying handle.
  • the carrying handle can be like from the EP 2 032 454 B1 be stamped on the bag head in a sealed area.
  • the second gusset on a carrying handle which then faces the reclosing device.
  • Suitable embodiments of carrying handles are off EP 2 148 820 B1 known.
  • the carrying handle may be staggered approximately midway or slightly offset with respect to the flat bottom of the gusseted bag with respect to the bag longitudinal direction, whereby then the weight of the gusseted bag can be easily controlled even when dispensed.
  • the flat bottom provided according to the invention by a separate film section usually has a heat-sealable inner layer and an outer layer, as described above, wherein the flat bottom can also be formed from the previously described bag film.
  • the flat bottom usually has a rectangular shape, wherein the length and width of the film section corresponds to the width of the front walls and the width of the side folds.
  • the Fig. 1 shows a gusseted bag with two opposite front walls 1a, 1b, a first gusset 2a and a second gusset 2b, wherein the gussets 2a, 2b extend opposite each other along a bag longitudinal direction l and each connect the two front walls 1a, 1b with each other.
  • FIG. 1 shows a filled and sealed in a transverse direction of the bag q by a head seal 3
  • Fig. 2 a flat-lying, unfilled gusseted bag according to the invention, which is provided as a prefabricated bag (pre-made bag) in a flat state for a subsequent filling.
  • the prefabricated, flattened bag is filled at the top initially not yet closed edge and closed by the head seal 3.
  • the side edges between the front walls 1a, 1b and the side folds 2a, 2b are reinforced by longitudinal sealing seams 4.
  • the bag has a reclosing device with a reclosing strip 6.
  • the reclosing strip 6 is arranged in the region of the first side fold 2a and extends over the two wings of the first side fold 2a inserted between the front walls 1a, 1b and along the front walls 1a, 1b.
  • the reclosure strip 6 extends on the front walls 1a, 1b beyond the first side fold 2a, so that the two front walls 1a, 1b can also be directly connected to one another in an area adjoining the first side fold 2a.
  • the two wings of the corresponding side fold 2a are connected to one of the two front walls 1a and 1b, respectively.
  • a weakening line 7 is arranged above the reclosure strip 6, with which a corner section 8 above the reclosure strip 6 can be separated.
  • the weakening line 7 can be formed for example by a punching, a perforation or a laser, wherein the various measures can also be combined.
  • a notch 9 is provided for crack initiation.
  • a transverse seam 10 is formed adjacent to the reclosure strip 6, which extends from the end of the reclosure strip 6 to the opposite edge of the bag.
  • the first gusset 2a can be folded outward by opening the reclosing device formed by the reclosing strip 6, forming a chute, and reinserting between the two front walls 1a, 1b for a new closure.
  • the gusseted bag has a flat bottom which is formed by a separate film section 11.
  • the film portion 11 is connected to the lower edges of the front walls 1a, 1b and the side folds 2a, 2b by heat sealing seams 12a, 12b. While the flat bottom during filling, the transport, storage and handling is particularly advantageous and allows a safe deployment of the gusseted bag, the contents can be easily removed with the reclosing device, in particular, the removal of subsets by the formation of a chute is exactly possible.
  • a carrying handle not shown, which is suitably arranged on the second side fold 2b, which is opposite to the reclosing device.
  • the reclosing strip 6 may comprise continuous closure formations in the form of grooves or projections or also a multiplicity of individual closure elements which can be locked together, wherein such individual closure elements which can be locked together may for example have the form of mushroom heads or hooked hooks.
  • the gussets 2a, 2b extend over the entire length of the front walls 1a, 1b and are not folded over in the region of the separate film section 11 to the outside.
  • the separate film section in the area of the side folds 2a, 2b is folded back on itself in such a way that all the heat sealing seams 12a, 12b provided for the connection of the film section on the one hand to the front walls and on the other hand for the connection of the film section 11 to the side folds 2a, 2b Bag transverse direction q run over each other and can be trimmed together in order to remove by dimensional and positional deviations resulting supernatants.
  • a preferred method for the preparation of in the Fig. 1 and 2 shown gusseted bag is in the Fig. 3a to 3f shown.
  • a material web is fed to a bag film 13 in a production direction p, which corresponds in its orientation to the bag longitudinal direction l.
  • the corresponding method is therefore also referred to as a longitudinal method.
  • a gusseted tube 14 is formed, which has a first front wall 1a, a second front wall 1b and two side folds 2a, 2b connecting the front walls 1a, 1b. According to the Fig. 3a the crease lines are already indicated.
  • Outer edges 15 of the bag film 13 are provided as a projection and are separated after the formation of the gusseted tube 14.
  • a transverse incision 16 is made such that the incision 16 in the subsequently formed gusseted tube 14 extends over the two gussets 2a, 2b and the first front wall 1a which extends between the gussets 2a, 2b is arranged.
  • the individual gusset bags are separated from the gusseted tube 14 in the region of the incisions 16, wherein the incision 16 is provided for the formation of a flat bottom.
  • a gusseted tube 14 can be pulled, for example, over a kind of core, which is then provided for generating the incisions 16, for example by punching, as a kind of abutment.
  • the incisions 16 can also be formed after the formation of a gusseted tube with a laser or a particularly precise punching, whereby a complete transection of the gusseted tube is always to be avoided.
  • the bag film 13 is at least two-layered and comprises a heat-sealable inner layer of polyolefin, in particular polyethylene and an outer layer of polyester, in particular PET.
  • the film section 11 may be formed of a same or similar material with a corresponding layer structure.
  • the heat-sealable inner layer is according to Fig. 3a at the flat-fed bag film 13 initially free, so that there can also be sealed for each gusseted bag a transverse reclosing strip 6. Adjacent to the reclosing strip 6, the weakening line 7 is also already produced in the flat bag film 13, with which the upper corner section 8 for exposing the reclosable strip 6 during a first opening can subsequently be separated in the finished gusseted bag.
  • the first front wall 1a can be raised, for which purpose, for example, grippers or vacuum cups can be used.
  • Fig. 3A is further indicated also that in the formation of the gusseted tube 14 also longitudinal sealing seams 4 can be generated.
  • the overhead first front wall 1a is partially folded, including the two side folds 2a, 2b and the second front wall 1b partially exposed (see Fig. 3b ), whereby then there the side folds 2a, 2b, starting from a bend line 17 at an angle of 45 ° to the outside.
  • a separate film section 11 is placed, which according to the Fig. 3b in particular can be supplied laterally.
  • the gusseted tube is moved in such a way that, based on the individual foil bags to be separated from the gusseted tube 14, the bottom region lies in front of the head region.
  • the production of the foil pouches can also take place in such a way that the production direction is exactly the opposite with respect to the upper edge and the lower edge of the lateral fold pouches to be formed, so that after the side fold tube 14 has been formed from the pouch foil 13 relative to the individual side fold pouches to be formed the head is in the direction of production p forward.
  • Such a reverse direction may be advantageous in order to fold back the folded-over section in the context of the invention in such a way that the second connecting seams run parallel to the first connecting seams in the transverse direction q.
  • Fig. 3E would then also result in a reversal of the production direction p, so that in the region of the separate film section 11 indicated by an arrow folding back the gussets 2a, 2b can be made easier.
  • this separate film section 11 is connected to the unfolded gussets with heat sealing seams 12b, wherein this heat sealing can be done with a flat gusseted hose 14.
  • the previously folded-over portion is folded back such that the second heat-sealing seams 12b are placed on the lower edge by inwardly buckling the separate film portion 11 on themselves, then finally the first heat-sealing seams 12a and the second heat-sealing seams 12b are superimposed.
  • the individual successive flat, unfilled gusseted bags are separated from each other by a double cut D and an outer edge is severed at the first and second heat sealing seams 12a, 12b in order to remove any overhangs and associated "speed cameras" (see also Fig. 2 ).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Bag Frames (AREA)
EP16170007.5A 2016-05-17 2016-05-17 Verfahren zur herstellung eines seitenfaltenbeutels sowie flachliegender, unbefüllter seitenfaltenbeutel Active EP3246266B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PL16170007T PL3246266T3 (pl) 2016-05-17 2016-05-17 Sposób wytwarzania torby z fałdami bocznymi oraz płaska, nienapełniona torba z fałdami bocznymi
EP16170007.5A EP3246266B1 (de) 2016-05-17 2016-05-17 Verfahren zur herstellung eines seitenfaltenbeutels sowie flachliegender, unbefüllter seitenfaltenbeutel
ES16170007T ES2724424T3 (es) 2016-05-17 2016-05-17 Procedimiento para la fabricación de una bolsa con pliegues laterales así como bolsa con pliegues laterales plana, vacía
US15/594,995 US20170334608A1 (en) 2016-05-17 2017-05-15 Method for producing a side-gusseted bag and flat, unfilled side-gusseted bag

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16170007.5A EP3246266B1 (de) 2016-05-17 2016-05-17 Verfahren zur herstellung eines seitenfaltenbeutels sowie flachliegender, unbefüllter seitenfaltenbeutel

Publications (2)

Publication Number Publication Date
EP3246266A1 EP3246266A1 (de) 2017-11-22
EP3246266B1 true EP3246266B1 (de) 2019-02-20

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EP16170007.5A Active EP3246266B1 (de) 2016-05-17 2016-05-17 Verfahren zur herstellung eines seitenfaltenbeutels sowie flachliegender, unbefüllter seitenfaltenbeutel

Country Status (4)

Country Link
US (1) US20170334608A1 (pl)
EP (1) EP3246266B1 (pl)
ES (1) ES2724424T3 (pl)
PL (1) PL3246266T3 (pl)

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Publication number Priority date Publication date Assignee Title
ES2863319T3 (es) 2018-10-24 2021-10-11 Mondi Ag Bolsa de embalaje con pliegues laterales sin llenar ni cerrar
FR3094351B1 (fr) * 2019-03-28 2021-03-19 Coveris Flexibles France Procédé de fabrication d’une pluralité de sacs d’emballage à ouvertures partielles et selon une technique transversale
US11377284B2 (en) * 2019-11-13 2022-07-05 General Mills, Inc. Resealable bag and method of producing the resealable bag
JP7528696B2 (ja) * 2020-09-30 2024-08-06 大日本印刷株式会社 チャック付き紙容器
EP4361061A1 (en) * 2022-10-26 2024-05-01 The Procter & Gamble Company Detergent product

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US4059478A (en) * 1974-03-25 1977-11-22 Hoffman Louis S Apparatus for bonding layers of resinous material
JP3176484B2 (ja) * 1993-07-09 2001-06-18 株式会社細川洋行 ジッパ付きガセット袋およびその製造方法
JPH11115948A (ja) * 1997-08-14 1999-04-27 Hosokawa Yoko:Kk 自立形固体および粉粒体用容器
ATE340693T1 (de) * 1999-12-02 2006-10-15 Totani Corp Maschine zur herstellung von kunststoffbeuteln
JP2002046197A (ja) * 2000-08-02 2002-02-12 Rengo Co Ltd 自立型の袋体の製造方法
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DE102006029119A1 (de) * 2006-06-22 2007-07-05 Nordenia Deutschland Halle Gmbh Werk Steinfeld Folienbeutel
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Also Published As

Publication number Publication date
US20170334608A1 (en) 2017-11-23
EP3246266A1 (de) 2017-11-22
PL3246266T3 (pl) 2019-08-30
ES2724424T3 (es) 2019-09-10

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