EP1754596A1 - Method for manufacturing bags with gussets - Google Patents

Method for manufacturing bags with gussets Download PDF

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Publication number
EP1754596A1
EP1754596A1 EP05018053A EP05018053A EP1754596A1 EP 1754596 A1 EP1754596 A1 EP 1754596A1 EP 05018053 A EP05018053 A EP 05018053A EP 05018053 A EP05018053 A EP 05018053A EP 1754596 A1 EP1754596 A1 EP 1754596A1
Authority
EP
European Patent Office
Prior art keywords
film
gussets
web
shaped
layer
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.)
Granted
Application number
EP05018053A
Other languages
German (de)
French (fr)
Other versions
EP1754596B1 (en
Inventor
Marcus Kujat
Detlef Stöppelmann
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.)
Nordenia Deutschland Halle GmbH
Original Assignee
Nordenia Deutschland Halle GmbH
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 Nordenia Deutschland Halle GmbH filed Critical Nordenia Deutschland Halle GmbH
Priority to PL05018053T priority Critical patent/PL1754596T3/en
Priority to EP05018053A priority patent/EP1754596B1/en
Priority to ES05018053T priority patent/ES2292027T3/en
Priority to DE502005001691T priority patent/DE502005001691D1/en
Priority to AT05018053T priority patent/ATE375247T1/en
Publication of EP1754596A1 publication Critical patent/EP1754596A1/en
Application granted granted Critical
Publication of EP1754596B1 publication Critical patent/EP1754596B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • B31B2155/00—Flexible containers made from 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
    • 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
    • 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
    • B31B70/26—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
    • 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
    • B31B70/36—Folding sheets, blanks or webs by continuously feeding them to stationary members, e.g. plates, ploughs or cores
    • 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

Definitions

  • the invention relates to a method for the production of film bags, which have two front sides of a multilayer composite film, V-shaped inserted side folds and a head-side bag opening, wherein the side folds terminate below the bag opening and wherein the upper end of the side folds is closed by a sealed cover film, which defines the respective gusset end on one of the two front sides.
  • the composite film On the inside of the bag, the composite film has a sealing layer of a weldable thermoplastic material and a printed, non-sealable outer layer. In the bag opening a reclosure may be arranged.
  • the flat film pouches produced in the process are loaded with filling material in bag filling devices.
  • the filling takes place at the head of the bag. After filling, the bag opening is closed.
  • a method for producing the described foil pouch is made US Pat. No. 6,068,585 known.
  • film sections which are prefolded onto a flat film web and which form the later gussets of the film bags are laid transversely to the web direction and are welded to the flat film web.
  • a film strip on which locking elements of a reclosure are formed, is placed over the end of the gussets and connected to the gussets and the film web through sealed seams.
  • a second film web is supplied, which is already provided with a counterpart for reclosing, and by longitudinal and transverse sealing seams with the lower film web to a bag-shaped sections consisting of bag-shaped sections connected, are separable from the individual bags.
  • the invention has for its object to provide a method for producing the film bag described above, in which the front sides and side folds of the film bag are formed by folding a flat material web.
  • the object is to integrate the closing of the gussets in the process flow so that the placement and fastening of the cover sheets for closing the gussets does not adversely affect the production speed.
  • the film layers lying on top of one another of the film tube formed in process step e) can be connected to form a bag string consisting of bag-shaped sections, from which individual bags can be separated. If the foil pouches to be produced are to be equipped with a reclosure, reclosures are applied transversely to the web direction onto the sealing layer of the flat film web and connected to the film web following process step b).
  • film labels are used from a cover film and sealed onto the flat film web. Thereafter, the film web passes through with sealed film sheets other workstations in which optionally reseals sealed and gussets are formed before the film sheets are circumferentially sealed onto the film web that the upper ends of the gussets between the film web and the sealed film sheets are included.
  • the laying on and fastening of the foil strip on the one hand and the further sealing process on the other hand are assigned to different workstations in the context of the method according to the invention. By this division, the measures for sealing the gussets are integrated into the process flow so that the production speed is not impaired.
  • a multilayer composite film is preferably used, which has on its one side a sealing layer of a weldable thermoplastic material and on its other side a non-sealable layer.
  • a sealing layer of a weldable thermoplastic material on its other side a non-sealable layer.
  • composite films comprising a polyolefinic sealant layer and a non-sealable polyester layer may be used.
  • a further advantageous embodiment of the method according to the invention provides that the outer edges of the flattened film tube are reinforced by longitudinal sealing seams which connect the front surfaces of the film tube with the adjacent film layer of the V-shaped side folds.
  • the foil sheets extend into the region of these longitudinal sealing seams.
  • the sealed cover sheets close the gussets at their upper end usually sufficient.
  • the process sees as another Design before that the upper edges of the V-shaped inserted side gussets are connected to each other and only then are welded to the side gussets protruding film sections of the sheet of foil with the film web.
  • the following method is preferably used.
  • the outer layers of the composite films are at least partially removed by laser ablation in strip-shaped sections which extend along the edge of the window-shaped cut-outs delimiting the upper end of the lateral folds.
  • the sealing layer of the composite film is exposed locally, so that subsequently the sealing layers can be thermally connected by a sealed seam.
  • the material of the outer layer is removed by laser irradiation.
  • the laser beams penetrate during laser ablation in the material to be processed. The depth of impact remains low during a pulse, but the energy input into this layer is so high that molecular compounds are broken up and matter is ejected at sufficient energy per surface. This happens so fast that no heat can penetrate the remaining solid material.
  • the ablation thus takes place without a significant thermal load on the environment of the direct radiation exposure.
  • Each pulse of the laser breaks up a thin layer of the substrate. As the laser operates at several hundred pulses per second, a faster machining process is guaranteed.
  • the laser ablation of the non-sealable outer layer of the composite film can take place in the strip-shaped sections over the entire surface.
  • the outer layer is in the region of the window-shaped Cutouts adjacent strip-shaped section therefore removed in the form of a grid by laser ablation. It is also advantageous if a composite film is used whose outer layer is unprinted at the points which are removed by laser ablation or whose outer layer is not glued to the sealing layer in areas which are removed by laser ablation.
  • the composite foil is perforated in the surface sections in which the outer layer is removed by laser ablation.
  • the molten material of the sealing layer enters the perforation area and fills it. The molten material has no contamination and forms an effective contact surface for the sealing compound.
  • the additional measures described can be advantageously integrated into the process sequence in the following manner.
  • the material web is fed to the top, non-sealable outer layer of the first workstations in which the window-shaped punched holes are punched and removed by laser ablation strip-shaped sections in the outer layer. Thereafter, the film web is turned, the foil tape welded and carried out the further process steps.
  • the film bag shown in FIGS. 1 to 3 consists of a multilayer composite film 1, the bag inside a sealing layer 2 made of a weldable thermoplastic material, eg. As polyethylene, and bag outside a printed, non-sealable outer layer 3, z. B. made of polyester.
  • the film bag has two front sides 4, 4 ', V-shaped inserted side folds 5 and a reclosure 6 in a head-side opening of the bag.
  • the front sides 4, 4 ' are connected by an additional sealing seam 7, which forms a tamper-evident closure and is separated during the first use of the film bag.
  • the gussets 5 terminate below the reclosure 6 and are closed at their upper, in the interior of the bag projecting end 8 of a cover, which defines the respective side fold end on one of the two front sides 4 '.
  • the figures are taken from that the cover film is made up as a foil tape 9, which are wider than the gussets 5 and extend into the region of a longitudinal sealing seam 10 of the film bag.
  • the film tabs 9 are sealed onto the gussets 5 and welded to a protruding portion with the lying behind the gussets 5 front side 4 'of the film bag.
  • FIG. 4 On the basis of a very simplified representation, the method for producing the film bag is shown in FIG. 4.
  • a sealing layer of a weldable thermoplastic material and a printed, non-sealable outer layer has window-shaped cutouts 12 are introduced, which limit the upper end 8 of the gussets formed later.
  • foil tape 9 are placed from a cover and with sections a of the film web adjacent to the window-shaped punched 12 directly or with a small distance and at the laterally formed side folds 5 each form the upper film layer of the gussets, welded.
  • the film tabs 9 are wider than the side folds 5 formed later and are in the window-shaped punched 12 in front.
  • reclosures 6 are placed transversely to the web direction on the sealing layer of the flat film web 11 and connected to the film web 11.
  • the reclosures 6 consist of detachably connected profile strips.
  • the film web 11 passes through a folding station 13, in which gussets 5 are formed by folding the film web.
  • the previously already attached film tabs 9 project beyond the edge of the gussets and are welded to the protruding edge portions 14 with the underlying sealing layer of the film web.
  • the film web is folded into a flattened film tube 15. With longitudinal and transverse sealing seams, the superimposed film layers are joined to form a bag string consisting of bag-shaped sections 16. Furthermore, a still protruding narrow waste strip 17 is separated. From the bag string eventually individual bags are separable.
  • the foil tape 9 as well as the flat film web 11 consist of a multilayer composite film, on its one side a sealing layer of a weldable thermoplastic material, for. As a polyolefin, and on the other side a non-sealable layer, for. B. made of polyester.
  • the outer edges of the flattened film tube 15 are reinforced by longitudinal sealing seams 10 which connect the front sides 4, 4 'of the film tube with the adjacent film layer of the V-shaped side folds 5.
  • the film tabs 9 extend into the region of the longitudinal sealing seams 10 and are incorporated into these.
  • FIG. 5 which depicts the connecting area at the upper end of the gussets, shows that the outer layer 3 of the composite film 1 has been completely or at least partially removed in a strip-shaped section along the upper edge 17 of the gussets by a surface treatment, preferably by laser ablation is. As a result, the sealing layer 2 of the composite film 1 was exposed at the contact surface.
  • the film layers of the side pleats 5 have been thermally bonded in the strip-shaped section by a sealed seam 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Bag Frames (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

The method involves conducting a sheet (11) through a folding station (13), where side gussets are formed by folding of the sheet. A foil slip (9) has edge sections (14) that are fused with an underlying seal section of the sheet. The sheet is folded toward a foil tube (15), where the tube processes toward a foil pouch. Application and fixation of the foil slip and a sealing operation of side gussets are assigned to different working stations.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von Folienbeuteln, die zwei Frontseiten aus einer mehrschichtigen Verbundfolie, V-förmig eingelegte Seitenfalten und eine kopfseitige Beutelöffnung aufweisen, wobei die Seitenfalten unterhalb der Beutelöffnung enden und wobei das obere Ende der Seitenfalten von einer aufgesiegelten Abdeckfolie verschlossen ist, die das jeweilige Seitenfaltenende an einer der beiden Frontseiten festlegt. Die Verbundfolie weist beutelinnenseitig eine Siegelschicht aus einem schweißbaren thermoplastischen Kunststoff und eine bedruckte, nicht siegelfähige Außenschicht auf. In der Beutelöffnung kann ein Wiederverschluss angeordnet sein.The invention relates to a method for the production of film bags, which have two front sides of a multilayer composite film, V-shaped inserted side folds and a head-side bag opening, wherein the side folds terminate below the bag opening and wherein the upper end of the side folds is closed by a sealed cover film, which defines the respective gusset end on one of the two front sides. On the inside of the bag, the composite film has a sealing layer of a weldable thermoplastic material and a printed, non-sealable outer layer. In the bag opening a reclosure may be arranged.

Die bei dem Verfahren hergestellten, flach liegenden Folienbeutel werden in Beutelfülleinrichtungen mit Füllgut beschickt. Die Befüllung erfolgt am Kopf der Beutel. Nach der Befüllung wird die Beutelöffnung geschlossen. Es bleibt noch das technische Problem, die oberen Enden der abgesetzten Seitenfalten dicht zu verschließen. Dies ist schwierig, da die im Bereich der Seitenfalten aufeinander liegenden Außenschichten der Verbundfolie nicht auf sich selbst verschweißbar sind.The flat film pouches produced in the process are loaded with filling material in bag filling devices. The filling takes place at the head of the bag. After filling, the bag opening is closed. There remains the technical problem of tightly closing the upper ends of the offset gussets. This is difficult, since the outer layers of the composite film, which lie on one another in the area of the side folds, can not be welded on themselves.

Ein Verfahren zur Herstellung der beschriebenen Folienbeutel ist aus US 6 068 585 bekannt. Bei dem bekannten Verfahren werden auf eine ebene Folienbahn vorgefaltete Folienabschnitte, welche die späteren Seitenfalten der Folienbeutel bilden, quer zur Bahnrichtung aufgelegt und mit der ebenen Folienbahn verschweißt. Ein Folienstreifen, an den Rastelemente eines Wiederverschlusses angeformt sind, wird über das Ende der Seitenfalten gelegt und mit den Seitenfalten sowie der Folienbahn durch Siegelnähte verbunden. Danach wird eine zweite Folienbahn zugeführt, die bereits mit einem Gegenstück für den Wiederverschluss versehen ist, und durch Längs- und Quersiegelnähte mit der unteren Folienbahn zu einem aus beutelförmigen Abschnitten bestehenden Beutelstrang verbunden, von dem einzelne Beutel abtrennbar sind. Die Handhabung der für die Seitenfalten benötigten vorgefalteten Streifen sowie ihre Applikation auf der ebenen Folienbahn ist aufwendig. Auch in funktionsmäßiger Hinsicht sind die zahlreichen Siegelnähte, die zur Verbindung der Seitenfalten mit den Frontseiten notwendig sind, nachteilig. So ist es schwierig und erfordert eine sehr genaue Einhaltung der Prozessparameter beim Siegeln, um sicherzustellen, dass die Längssiegelnähte über ihre gesamte Länge einschließlich der kritischen Anschlussbereiche am Beutelboden und im Bereich des aufgesiegelten Wiederverschlusses völlig dicht sind.A method for producing the described foil pouch is made US Pat. No. 6,068,585 known. In the known method, film sections which are prefolded onto a flat film web and which form the later gussets of the film bags are laid transversely to the web direction and are welded to the flat film web. A film strip on which locking elements of a reclosure are formed, is placed over the end of the gussets and connected to the gussets and the film web through sealed seams. Thereafter, a second film web is supplied, which is already provided with a counterpart for reclosing, and by longitudinal and transverse sealing seams with the lower film web to a bag-shaped sections consisting of bag-shaped sections connected, are separable from the individual bags. The handling of the pre-folded strips required for the gussets and their application to the flat film web is complicated. Also in terms of function, the numerous sealing seams that are necessary for connecting the gussets with the front sides, are disadvantageous. Thus, it is difficult and requires very close adherence to the process parameters during sealing to ensure that the longitudinal sealing seams are completely sealed over their entire length including the critical connection areas at the bottom of the bag and in the area of the sealed reclosure.

Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, ein Verfahren zur Herstellung der eingangs beschriebenen Folienbeutel anzugeben, bei dem die Frontseiten und Seitenfalten der Folienbeutel durch Falten einer ebenen Materialbahn gebildet werden. Dabei ergibt sich das technische Problem, die Abdeckfolie zum Verschließen der oberen Enden der Seitenfalten so aufzubringen, dass die Produktionsgeschwindigkeit nicht leidet. Da die Folienbeutel aus einer Folienbahn gefertigt werden, die bis zum fertigen Beutel mehrere Arbeitsstationen durchläuft, bestimmt die langsamste Arbeitsstation die Produktionsgeschwindigkeit der gesamten Anlage. Die Aufgabe besteht darin, das Verschließen der Seitenfalten so in den Verfahrensablauf zu integrieren, dass sich das Auflegen und Befestigen der Abdeckfolien zum Verschließen der Seitenfalten nicht nachteilig auf die Produktionsgeschwindigkeit auswirkt.Against this background, the invention has for its object to provide a method for producing the film bag described above, in which the front sides and side folds of the film bag are formed by folding a flat material web. This results in the technical problem of applying the cover for closing the upper ends of the gussets so that the production speed does not suffer. Since the film bags are made from a film web that passes through several workstations to the finished bag, determines the slowest workstation, the production speed of the entire system. The object is to integrate the closing of the gussets in the process flow so that the placement and fastening of the cover sheets for closing the gussets does not adversely affect the production speed.

Gegenstand der Erfindung und Lösung dieser Aufgabe ist ein Verfahren mit folgenden Verfahrensschritten:

  1. a) in eine ebene Folienbahn aus einer mehrschichtigen Verbundfolie, die eine Siegelschicht aus einem schweißbaren thermoplastischen Kunststoff und eine bedruckte, nicht siegelfähige Außenschicht aufweist, werden fensterförmige Ausstanzungen eingebracht, die das obere Ende später gebildeter Seitenfalten begrenzen;
  2. b) auf die Folienbahn werden Folienzettel aus einer Abdeckfolie aufgelegt sowie mit Abschnitten der Folienbahn, die an die fensterförmigen Ausstanzungen unmittelbar oder mit einem kleinen Abstand angrenzen und an den später gebildeten Seitenfalten jeweils die obere Folienlage der Seitenfalten bilden, verschweißt, wobei die Folienzettel in die fensterförmigen Ausstanzungen hinein vorstehen und breiter sind als die später gebildeten Seitenfalten;
  3. c) die Folienbahn wird durch eine Faltstation geführt, in der durch Falten der Folienbahn Seitenfalten gebildet werden;
  4. d) die danach über die Berandung der Seitenfalten vorstehenden Randabschnitte der Folienzettel werden mit der darunter liegenden Siegelschicht der Folienbahn verschweißt;
  5. e) die Folienbahn wird zu einem flachgelegten Folienschlauch gefaltet, der zu Folienbeuteln weiterverarbeitet wird.
The subject of the invention and solution of this problem is a method with the following method steps:
  1. a) in a flat film web of a multilayer composite film having a sealing layer of a weldable thermoplastic and a printed, non-sealable outer layer, window-shaped cutouts are introduced which delimit the upper end of laterally formed side folds;
  2. b) on the film web foil tape are placed from a cover and with sections of the film web adjacent to the window-shaped punched directly or with a small distance and at the laterally formed side folds each form the upper film layer of gussets, welded, the film slip in the window-shaped cutouts protrude into it and are wider than the laterally formed side folds;
  3. c) the film web is passed through a folding station in which gussets are formed by folding the film web;
  4. d) the edge sections of the film strips projecting beyond the edges of the side folds are welded to the underlying sealing layer of the film web;
  5. e) the film web is folded into a flattened film tube, which is further processed to foil bags.

Mit Längs- und Quersiegelnähten können die aufeinander liegenden Folienlagen des im Verfahrensschritt e) gebildeten Folienschlauchs zu einem aus beutelförmigen Abschnitten bestehenden Beutelstrang verbunden werden, von dem einzelne Beutel abtrennbar sind. Wenn die herzustellenden Folienbeutel mit einem Wiederverschluss ausgerüstet werden sollen, werden im Anschluss an den Verfahrensschritt b) Wiederverschlüsse quer zur Bahnrichtung auf die Siegelschicht der ebenen Folienbahn aufgelegt und mit der Folienbahn verbunden.With longitudinal and transverse sealing seams, the film layers lying on top of one another of the film tube formed in process step e) can be connected to form a bag string consisting of bag-shaped sections, from which individual bags can be separated. If the foil pouches to be produced are to be equipped with a reclosure, reclosures are applied transversely to the web direction onto the sealing layer of the flat film web and connected to the film web following process step b).

Bei dem erfindungsgemäßen Verfahren werden Folienzettel aus einer Abdeckfolie verwendet und auf die ebene Folienbahn aufgesiegelt. Danach durchläuft die Folienbahn mit aufgesiegelten Folienzetteln weitere Arbeitsstationen, in denen gegebenenfalls Wiederverschlüsse aufgesiegelt und Seitenfalten gebildet werden, bevor die Folienzettel umfangsseitig so auf die Folienbahn aufgesiegelt werden, dass die oberen Enden der Seitenfalten zwischen der Folienbahn und den aufgesiegelten Folienzetteln eingeschlossen sind. Das Auflegen und Befestigen der Folienzettel einerseits sowie der weitere Siegelvorgang andererseits werden im Rahmen des erfindungsgemäßen Verfahrens unterschiedlichen Arbeitsstationen zugeordnet. Durch diese Aufteilung werden die Maßnahmen zur Abdichtung der Seitenfalten so in den Verfahrensablauf integriert, dass die Produktionsgeschwindigkeit nicht beeinträchtigt ist.In the method according to the invention, film labels are used from a cover film and sealed onto the flat film web. Thereafter, the film web passes through with sealed film sheets other workstations in which optionally reseals sealed and gussets are formed before the film sheets are circumferentially sealed onto the film web that the upper ends of the gussets between the film web and the sealed film sheets are included. The laying on and fastening of the foil strip on the one hand and the further sealing process on the other hand are assigned to different workstations in the context of the method according to the invention. By this division, the measures for sealing the gussets are integrated into the process flow so that the production speed is not impaired.

Als Abdeckfolie wird vorzugsweise eine mehrschichtige Verbundfolie verwendet, die an ihrer einen Seite eine Siegelschicht aus einem schweißbaren thermoplastischen Kunststoff und an ihrer anderen Seite eine nicht siegelfähige Schicht aufweist. Sowohl für die Folienbahn als auch für die Folienzettel können Verbundfolien verwendet werden, die eine polyolefinische Siegelschicht und eine nichtsiegelfähige Schicht aus Polyester aufweisen.As a cover film, a multilayer composite film is preferably used, which has on its one side a sealing layer of a weldable thermoplastic material and on its other side a non-sealable layer. For both the film web and the film sheets, composite films comprising a polyolefinic sealant layer and a non-sealable polyester layer may be used.

Eine weitere vorteilhafte Ausgestaltung des erfindungsgemäßen Verfahrens sieht vor, dass die Außenkanten des flachgelegten Folienschlauches durch Längssiegelnähte, welche die Frontflächen des Folienschlauches mit der angrenzenden Folienlage der V-förmigen Seitenfalten verbinden, verstärkt werden. Zweckmäßig erstrecken sich die Folienzettel bis in den Bereich dieser Längssiegelnähte.A further advantageous embodiment of the method according to the invention provides that the outer edges of the flattened film tube are reinforced by longitudinal sealing seams which connect the front surfaces of the film tube with the adjacent film layer of the V-shaped side folds. Suitably, the foil sheets extend into the region of these longitudinal sealing seams.

Die aufgesiegelten Abdeckfolien verschließen die Seitenfalten an ihrem oberen Ende in aller Regel ausreichend. Sofern in Bezug auf die Dichtigkeit außergewöhnlich hohe Anforderungen gestellt werden, sieht das Verfahren als weitere Ausgestaltung vor, dass die oberen Ränder der V-förmig eingelegten Seitenfalten miteinander verbunden und erst anschließend die an den Seitenfalten überstehenden Folienabschnitte der Folienzettel mit der Folienbahn verschweißt werden. Um eine zusätzliche Verbindung zwischen den Folienlagen der Seitenfalten herzustellen, wird vorzugsweise das folgende Verfahren angewandt. Die Außenschichten der Verbundfolien werden in streifenförmigen Abschnitten, die sich entlang des das obere Ende der Seitenfalten begrenzenden Randes der fensterförmigen Ausstanzungen erstrecken, durch Laserablation zumindest teilweise entfernt. Dadurch wird die Siegelschicht der Verbundfolie lokal freigelegt, so dass anschließend die Siegelschichten thermisch durch eine Siegelnaht verbunden werden können. Bei der Laserablation wird das Material der Außenschicht durch Laserbestrahlung abgetragen. Die Laserstrahlen dringen bei der Laserablation in das zu bearbeitende Material ein. Die Einwirkungstiefe bleibt während eines Impulses gering, wobei der Energieeintrag in diese Schicht jedoch so hoch ist, dass Molekülverbindungen aufgebrochen werden und Materie bei hinreichender Energie pro Fläche herausgeschleudert werden. Das passiert so schnell, dass keine Hitze in das zurückbleibende feste Material dringen kann. Die Ablation erfolgt also ohne eine nennenswerte thermische Belastung der Umgebung der direkten Strahleneinwirkung. Jeder Impuls des Lasers sprengt eine dünne Schicht des Substrats. Da der Laser mit mehreren hundert Impulsen pro Sekunde arbeitet, ist ein schneller Bearbeitungsprozess gewährleistet.The sealed cover sheets close the gussets at their upper end usually sufficient. As far as exceptionally high demands are made in terms of tightness, the process sees as another Design before that the upper edges of the V-shaped inserted side gussets are connected to each other and only then are welded to the side gussets protruding film sections of the sheet of foil with the film web. In order to make an additional connection between the film layers of the gussets, the following method is preferably used. The outer layers of the composite films are at least partially removed by laser ablation in strip-shaped sections which extend along the edge of the window-shaped cut-outs delimiting the upper end of the lateral folds. As a result, the sealing layer of the composite film is exposed locally, so that subsequently the sealing layers can be thermally connected by a sealed seam. In laser ablation, the material of the outer layer is removed by laser irradiation. The laser beams penetrate during laser ablation in the material to be processed. The depth of impact remains low during a pulse, but the energy input into this layer is so high that molecular compounds are broken up and matter is ejected at sufficient energy per surface. This happens so fast that no heat can penetrate the remaining solid material. The ablation thus takes place without a significant thermal load on the environment of the direct radiation exposure. Each pulse of the laser breaks up a thin layer of the substrate. As the laser operates at several hundred pulses per second, a faster machining process is guaranteed.

Die Laserablation der nicht siegelfähigen Außenschicht der Verbundfolie kann in den streifenförmigen Abschnitten vollflächig erfolgen. Bei einem vollflächigen Abtrag besteht allerdings die Gefahr, dass bei der Verdampfung der Kunststoffmoleküle Rückstände auf der freigelegten Fläche verbleiben, die die Siegeleigenschaften der freigelegten Siegelschicht beeinträchtigen. Ein rasterförmiges Lasern der Fläche verringert die Kontamination der freigelegten Fläche. Vorzugsweise wird die Außenschicht im Bereich des an die fensterförmigen Ausstanzungen angrenzenden streifenförmigen Abschnitts daher in Form eines Rasters durch Laserablation entfernt. Vorteilhaft ist es auch, wenn eine Verbundfolie verwendet wird, deren Außenschicht an den Stellen, die durch Laserablation entfernt werden, unbedruckt ist oder deren Außenschicht in Bereichen, die durch Laserablation entfernt werden, nicht mit der Siegelschicht verklebt ist. Dadurch kann bei der Laserablation eine Kontamination der freigelegten Flächen durch Restkleber bzw. Restdruckfarbe vermieden werden. Es erweist sich auch als vorteilhaft, wenn die Verbundfolie in den Flächenabschnitten, in denen die Außenschicht durch Laserablation entfernt wird, perforiert wird. Während des nachfolgenden Siegelvorganges tritt das schmelzflüssige Material der Siegelschicht in die Perforationsfläche ein und füllt dieses aus. Das schmelzflüssige Material weist keine Kontamination auf und bildet eine wirksame Kontaktfläche für die Siegelverbindung.The laser ablation of the non-sealable outer layer of the composite film can take place in the strip-shaped sections over the entire surface. In the case of full-area removal, however, there is the risk that, on evaporation of the plastic molecules, residues remain on the exposed surface, which impair the sealing properties of the exposed sealing layer. Screening the surface reduces contamination of the exposed surface. Preferably, the outer layer is in the region of the window-shaped Cutouts adjacent strip-shaped section therefore removed in the form of a grid by laser ablation. It is also advantageous if a composite film is used whose outer layer is unprinted at the points which are removed by laser ablation or whose outer layer is not glued to the sealing layer in areas which are removed by laser ablation. As a result, contamination of the exposed surfaces by residual adhesive or residual printing ink can be avoided during laser ablation. It also proves to be advantageous if the composite foil is perforated in the surface sections in which the outer layer is removed by laser ablation. During the subsequent sealing process, the molten material of the sealing layer enters the perforation area and fills it. The molten material has no contamination and forms an effective contact surface for the sealing compound.

Die beschriebenen zusätzlichen Maßnahmen lassen sich vorteilhaft auf die folgende Weise in den Verfahrensablauf integrieren. Die Materialbahn wird mit oben liegender, nicht siegelfähiger Außenschicht den ersten Arbeitsstationen zugeführt, in denen die fensterförmigen Ausstanzungen gestanzt und durch Laserablation streifenförmige Abschnitte in der Außenschicht abgetragen werden. Danach wird die Folienbahn gewendet, die Folienzettel angeschweißt sowie die weiteren Verfahrensschritte durchgeführt.The additional measures described can be advantageously integrated into the process sequence in the following manner. The material web is fed to the top, non-sealable outer layer of the first workstations in which the window-shaped punched holes are punched and removed by laser ablation strip-shaped sections in the outer layer. Thereafter, the film web is turned, the foil tape welded and carried out the further process steps.

Im Folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung erläutert. Es zeigen schematisch:

Fig. 1
einen Folienbeutel aus einer mehrschichtigen Verbundfolie,
Fig. 2
einen Schnitt A-A aus Fig. 1 in einer im Vergleich zu der Fig. 1 vergrößerten Darstellung,
Fig. 3
einen Schnitt B-B aus Fig. 2,
Fig. 4
Verfahrensschritte zur Herstellung der in Fig. 1 bis 3 dargestellten Folienbeuteln und
Fig. 5
einen Folienbeutel gemäß einer weiteren Ausgestaltung der Erfindung.
In the following the invention will be explained with reference to a drawing showing only one embodiment. They show schematically:
Fig. 1
a foil bag made of a multilayer composite film,
Fig. 2
1 shows a section AA of FIG. 1 in an enlarged representation compared to FIG. 1,
Fig. 3
a section BB of Fig. 2,
Fig. 4
Process steps for the production of the film bags shown in FIGS. 1 to 3 and
Fig. 5
a foil bag according to another embodiment of the invention.

Der in den Fig. 1 bis 3 dargestellte Folienbeutel besteht aus einer mehrschichtigen Verbundfolie 1, die beutelinnenseitig eine Siegelschicht 2 aus einem schweißbaren thermoplastischen Kunststoff, z. B. Polyethylen, und beutelaußenseitig eine bedruckte, nicht siegelfähige Außenschicht 3, z. B. aus Polyester aufweist. Der Folienbeutel weist zwei Frontseiten 4, 4', V-förmig eingelegte Seitenfalten 5 sowie einen Wiederverschluss 6 in einer kopfseitigen Öffnung des Beutels auf. Am oberen Rand des Folienbeutels sind die Frontseiten 4, 4' durch eine zusätzliche Siegelnaht 7 verbunden, die einen Originalitätsverschluss bildet und beim erstmaligen Gebrauch des Folienbeutels abgetrennt wird. Die Seitenfalten 5 enden unterhalb des Wiederverschlusses 6 und sind an ihrem oberen, in das Innere des Beutels vorstehenden Ende 8 von einer Abdeckfolie verschlossen, die das jeweilige Seitenfaltenende an einer der beiden Frontseiten 4' festlegt. Den Figuren entnimmt man, dass die Abdeckfolie als Folienzettel 9 konfektioniert ist, die breiter sind als die Seitenfalten 5 und sich bis in den Bereich einer Längssiegelnaht 10 des Folienbeutels erstrecken. Die Folienzettel 9 sind auf die Seitenfalten 5 aufgesiegelt und an einem überstehenden Abschnitt mit der hinter den Seitenfalten 5 liegenden Frontseite 4' des Folienbeutels verschweißt.The film bag shown in FIGS. 1 to 3 consists of a multilayer composite film 1, the bag inside a sealing layer 2 made of a weldable thermoplastic material, eg. As polyethylene, and bag outside a printed, non-sealable outer layer 3, z. B. made of polyester. The film bag has two front sides 4, 4 ', V-shaped inserted side folds 5 and a reclosure 6 in a head-side opening of the bag. At the upper edge of the film bag, the front sides 4, 4 'are connected by an additional sealing seam 7, which forms a tamper-evident closure and is separated during the first use of the film bag. The gussets 5 terminate below the reclosure 6 and are closed at their upper, in the interior of the bag projecting end 8 of a cover, which defines the respective side fold end on one of the two front sides 4 '. The figures are taken from that the cover film is made up as a foil tape 9, which are wider than the gussets 5 and extend into the region of a longitudinal sealing seam 10 of the film bag. The film tabs 9 are sealed onto the gussets 5 and welded to a protruding portion with the lying behind the gussets 5 front side 4 'of the film bag.

Anhand einer sehr vereinfachten Darstellung ist in Fig. 4 das Verfahren zur Herstellung der Folienbeutel dargestellt. In eine ebene Folienbahn 11 aus einer mehrschichtigen Verbundfolie, die eine Siegelschicht aus einem schweißbaren thermoplastischen Kunststoff und eine bedruckte, nicht siegelfähige Außenschicht aufweist, werden fensterförmige Ausstanzungen 12 eingebracht, die das obere Ende 8 der später gebildeten Seitenfalten begrenzen. Auf die ebene Folienbahn 11 werden Folienzettel 9 aus einer Abdeckfolie aufgelegt sowie mit Abschnitten a der Folienbahn, die an die fensterförmigen Ausstanzungen 12 unmittelbar oder mit einem kleinen Abstand angrenzen und an den später gebildeten Seitenfalten 5 jeweils die obere Folienlage der Seitenfalten bilden, verschweißt. Die Folienzettel 9 sind breiter als die später gebildeten Seitenfalten 5 und stehen in die fensterförmigen Ausstanzungen 12 hinein vor. In einer nächsten Arbeitsstation werden quer zur Bahnrichtung auf die Siegelschicht der ebenen Folienbahn 11 Wiederverschlüsse 6 aufgelegt und mit der Folienbahn 11 verbunden. Die Wiederverschlüsse 6 bestehen aus lösbar verbundenen Profilstreifen. Danach durchläuft die Folienbahn 11 eine Faltstation 13, in der durch Falten der Folienbahn Seitenfalten 5 gebildet werden. Nachdem die Seitenfalten 5 geformt sind, stehen die zuvor bereits befestigten Folienzettel 9 über die Berandung der Seitenfalten vor und werden an den vorstehenden Randabschnitten 14 mit der darunter liegenden Siegelschicht der Folienbahn verschweißt. Anschließend wird die Folienbahn zu einem flachgelegten Folienschlauch 15 gefaltet. Mit Längs- und Quersiegelnähten werden die aufeinander liegenden Folienlagen zu einem aus beutelförmigen Abschnitten 16 bestehenden Beutelstrang verbunden. Ferner wird ein noch überstehender schmaler Abfallstreifen 17 abgetrennt. Von dem Beutelstrang sind schließlich einzelne Beutel abtrennbar.On the basis of a very simplified representation, the method for producing the film bag is shown in FIG. 4. In a flat film web 11 of a multilayer composite film, a sealing layer of a weldable thermoplastic material and a printed, non-sealable outer layer has window-shaped cutouts 12 are introduced, which limit the upper end 8 of the gussets formed later. On the flat film web 11 are foil tape 9 are placed from a cover and with sections a of the film web adjacent to the window-shaped punched 12 directly or with a small distance and at the laterally formed side folds 5 each form the upper film layer of the gussets, welded. The film tabs 9 are wider than the side folds 5 formed later and are in the window-shaped punched 12 in front. In a next workstation 11 reclosures 6 are placed transversely to the web direction on the sealing layer of the flat film web 11 and connected to the film web 11. The reclosures 6 consist of detachably connected profile strips. Thereafter, the film web 11 passes through a folding station 13, in which gussets 5 are formed by folding the film web. After the gussets 5 are formed, the previously already attached film tabs 9 project beyond the edge of the gussets and are welded to the protruding edge portions 14 with the underlying sealing layer of the film web. Subsequently, the film web is folded into a flattened film tube 15. With longitudinal and transverse sealing seams, the superimposed film layers are joined to form a bag string consisting of bag-shaped sections 16. Furthermore, a still protruding narrow waste strip 17 is separated. From the bag string eventually individual bags are separable.

Die Folienzettel 9 bestehen ebenso wie die ebene Folienbahn 11 aus einer mehrschichtigen Verbundfolie, die an ihrer einen Seite eine Siegelschicht aus einem schweißbaren thermoplastischen Kunststoff, z. B. einem Polyolefin, und an der anderen Seite eine nicht siegelfähige Schicht, z. B. aus Polyester, aufweist.The foil tape 9 as well as the flat film web 11 consist of a multilayer composite film, on its one side a sealing layer of a weldable thermoplastic material, for. As a polyolefin, and on the other side a non-sealable layer, for. B. made of polyester.

Die Außenkanten des flachgelegten Folienschlauches 15 werden durch Längssiegelnähte 10, welche die Frontseiten 4, 4' des Folienschlauches mit der angrenzenden Folienlage der V-förmigen Seitenfalten 5 verbinden, verstärkt. Die Folienzettel 9 erstrecken sich bis in den Bereich der Längssiegelnähte 10 und sind in diese eingebunden.The outer edges of the flattened film tube 15 are reinforced by longitudinal sealing seams 10 which connect the front sides 4, 4 'of the film tube with the adjacent film layer of the V-shaped side folds 5. The film tabs 9 extend into the region of the longitudinal sealing seams 10 and are incorporated into these.

Im Ausführungsbeispiel der Fig. 5 sind die oberen Ränder 17 der V-förmig eingelegten Seitenfalten 5 zusätzlich miteinander verbunden. Der Fig. 5, welche den Verbindungsbereich am oberen Ende der Seitenfalten darstellt, entnimmt man, dass die Außenschicht 3 der Verbundfolie 1 in einem streifenförmigen Abschnitt entlang des oberen Randes 17 der Seitenfalten durch eine Oberflächenbehandlung, vorzugsweise durch Laserablation, ganz oder zumindest teilweise entfernt worden ist. Dadurch wurde die Siegelschicht 2 der Verbundfolie 1 an der Kontaktfläche freigelegt. Die Folienlagen der Seitenfalten 5 sind im streifenförmigen Abschnitt durch eine Siegelnaht 18 thermisch verbunden worden.In the embodiment of FIG. 5, the upper edges 17 of the V-shaped inserted gussets 5 are additionally connected to each other. FIG. 5, which depicts the connecting area at the upper end of the gussets, shows that the outer layer 3 of the composite film 1 has been completely or at least partially removed in a strip-shaped section along the upper edge 17 of the gussets by a surface treatment, preferably by laser ablation is. As a result, the sealing layer 2 of the composite film 1 was exposed at the contact surface. The film layers of the side pleats 5 have been thermally bonded in the strip-shaped section by a sealed seam 18.

Claims (9)

Verfahren zur Herstellung von Folienbeuteln, die zwei Frontseiten aus einer mehrschichtigen Verbundfolie, V-förmig eingelegte Seitenfalten und eine kopfseitige Beutelöffnung aufweisen, wobei die Seitenfalten unterhalb der Beutelöffnung enden und wobei das obere Ende der Seitenfalten von einer aufgesiegelten Abdeckfolie verschlossen ist, die das jeweilige Seitenfaltenende an einer der beiden Frontseiten festlegt, mit folgenden Verfahrensschritten: a) in eine ebene Folienbahn (11) aus einer mehrschichtigen Verbundfolie, die eine Siegelschicht aus einem schweißbaren thermoplastischen Kunststoff und eine bedruckte, nicht siegelfähige Außenschicht aufweist, werden fensterförmige Ausstanzungen (12) eingebracht, die das obere Ende (8) später gebildeter Seitenfalten (5) begrenzen; b) auf die Folienbahn (11) werden Folienzettel (9) aus einer Abdeckfolie aufgelegt sowie mit Abschnitten (a) der Folienbahn, die an die fensterförmigen Ausstanzungen (12) unmittelbar oder mit einem kleinen Abstand angrenzen und an den später gebildeten Seitenfalten (5) jeweils die obere Folienlage der Seitenfalten bilden, verschweißt, wobei die Folienzettel (9) in die fensterförmigen Ausstanzungen (12) hinein vorstehen und breiter sind als die später gebildeten Seitenfalten (5); c) die Folienbahn (11) wird durch eine Faltstation (13) geführt, in der durch Falten der Folienbahn Seitenfalten (5) gebildet werden; d) die über die Berandung der Seitenfalten (5) vorstehenden Randabschnitte (14) der Folienzettel (9) werden mit der darunter liegenden Siegelschicht der Folienbahn verschweißt; e) die Folienbahn wird zu einem flachgelegten Folienschlauch (15) gefaltet, der zu Folienbeuteln weiterverarbeitet wird. A process for the manufacture of film bags having two front sides of a multilayer composite film, gusseted side gussets and a head-side bag opening, the gussets terminating below the bag opening and the upper end of the gussets being closed by a sealed cover film containing the respective gusset end on one of the two fronts, with the following procedural steps: a) in a flat film web (11) of a multilayer composite film having a sealing layer of a weldable thermoplastic material and a printed, non-sealable outer layer, window-shaped punched-out (12) are introduced, the upper end (8) later formed gussets ( 5) limit; b) on the film web (11) are foil tabs (9) made of a cover sheet and with sections (a) of the film web, the window-shaped outs (12) directly or with a small distance adjacent and laterally formed on the side folds (5) each form the upper film layer of the gussets, welded, wherein the foil tabs (9) project into the window-shaped cut-outs (12) and are wider than the laterally formed gussets (5); c) the film web (11) is guided by a folding station (13) in which gussets (5) are formed by folding the film web; d) the over the edge of the side folds (5) protruding edge portions (14) of the film tab (9) are welded to the underlying sealing layer of the film web; e) the film web is folded into a flattened film tube (15), which is further processed to film bags. Verfahren nach Anspruch 1, wobei mit Längs- und Quersiegelnähten die aufeinander liegenden Folienlagen des im Verfahrensschritt e) gebildeten Folienschlauchs (15) zu einem aus beutelförmigen Abschnitten (16) bestehenden Beutelstrang verbunden werden, von dem einzelne Beutel abtrennbar sind.The method of claim 1, wherein longitudinal and transverse sealing seams, the superimposed film layers of the film tube (15) formed in step e) are connected to a bag-shaped sections consisting of bag-shaped sections (16), from which individual bags are separable. Verfahren nach Anspruch 1 oder 2, wobei im Anschluss an den Verfahrensschritt b) Wiederverschlüsse (6) quer zur Bahnrichtung auf die Siegelschicht der ebenen Folienbahn (11) aufgelegt und mit der Folienbahn verbunden werden.A method according to claim 1 or 2, wherein subsequent to the process step b) reclosures (6) are placed transversely to the web direction on the sealing layer of the flat film web (11) and connected to the film web. Verfahren nach einem der Ansprüche 1 bis 3, wobei als Abdeckfolie eine mehrschichtige Verbundfolie verwendet wird, die an ihrer einen Seite eine Siegelschicht aus einem schweißbaren thermoplastischen Kunststoff und an ihrer anderen Seite eine nicht siegelfähige Schicht aufweist.Method according to one of claims 1 to 3, wherein as the cover film, a multilayer composite film is used which has on its one side a sealing layer of a weldable thermoplastic material and on its other side a non-sealable layer. Verfahren nach einem der Ansprüche 1 bis 4, wobei die Außenkanten des flachgelegten Folienschlauches (15) durch Längssiegelnähte (10), welche die Frontseiten (4, 4') des Folienschlauches mit der angrenzenden Folienlage der V-förmig eingelegten Seitenfalten (5) verbinden, verstärkt werden und wobei die Folienzettel (9) sich bis in den Bereich der Längssiegelnähte (10) erstrecken.Method according to one of claims 1 to 4, wherein the outer edges of the flattened film tube (15) by longitudinal sealing seams (10) which connect the front sides (4, 4 ') of the film tube with the adjacent film layer of the V-shaped gussets (5) inserted, be reinforced and wherein the foil tabs (9) extend into the region of the longitudinal sealing seams (10). Verfahren nach einem der Ansprüche 1 bis 5, wobei für die Folienbahn (11) und die Folienzettel (9) Verbundfolien verwendet werden, die eine polyolefinische Siegelschicht und eine nicht siegelfähige Schicht aus Polyester aufweisen.Method according to one of claims 1 to 5, wherein for the film web (11) and the foil tabs (9) composite films are used which have a polyolefinic sealing layer and a non-sealable layer of polyester. Verfahren nach einem der Ansprüche 1 bis 6, wobei die oberen Ränder (17) der V-förmig eingelegten Seitenfalten (5) miteinander verbunden und erst anschließend die an den Seitenfalten überstehenden Folienabschnitte der Folienzettel (9) mit der Folienbahn verschweißt werden.Method according to one of claims 1 to 6, wherein the upper edges (17) of the V-shaped inserted gussets (5) connected to each other and only then the film folds of the film tab (9) projecting at the side folds are welded to the film web. Verfahren nach Anspruch 7, wobei die Außenschicht (3) der Verbundfolie (1) in streifenförmigen Abschnitten, die sich entlang des das obere Ende der Seitenfalten (5) begrenzenden Randes (17) der fensterförmigen Ausstanzungen (12) erstrecken, durch Laserablation zumindest teilweise entfernt wird und wobei die Folienlagen der Seitenfalten (5) in den streifenförmigen Abschnitten, in denen die Außenschicht (3) der Verbundfolie (1) durch Laserablation entfernt worden ist, durch eine Siegelnaht (18) verbunden werden.Method according to claim 7, wherein the outer layer (3) of the composite film (1) is at least partially removed by laser ablation in strip-shaped sections which extend along the edge (17) of the window-shaped cutouts (12) bordering the upper end of the lateral folds (5) and wherein the film layers of the side pleats (5) in the strip-shaped sections, in which the outer layer (3) of the composite film (1) has been removed by laser ablation, are connected by a sealed seam (18). Verfahren nach Anspruch 7 oder 8, wobei die zunächst oben liegende Außenschicht (3) der ebenen Folienbahn (11) in den streifenförmigen Abschnitten durch Laserablation abgetragen wird, wobei die Folienbahn (11) anschließend gewendet wird und die Folienzettel (9) angeschweißt werden.A method according to claim 7 or 8, wherein the initially upper outer layer (3) of the flat film web (11) is removed in the strip-shaped sections by laser ablation, wherein the film web (11) is subsequently turned and the foil tabs (9) are welded.
EP05018053A 2005-08-19 2005-08-19 Method for manufacturing bags with gussets Not-in-force EP1754596B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PL05018053T PL1754596T3 (en) 2005-08-19 2005-08-19 Method for manufacturing bags with gussets
EP05018053A EP1754596B1 (en) 2005-08-19 2005-08-19 Method for manufacturing bags with gussets
ES05018053T ES2292027T3 (en) 2005-08-19 2005-08-19 PROCEDURE FOR MANUFACTURING LAMINAR MATERIAL BAGS WITH SIDE SHEETS.
DE502005001691T DE502005001691D1 (en) 2005-08-19 2005-08-19 Method for producing foil bags with gussets
AT05018053T ATE375247T1 (en) 2005-08-19 2005-08-19 METHOD FOR PRODUCING FILM BAGS WITH SIDE FLATS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05018053A EP1754596B1 (en) 2005-08-19 2005-08-19 Method for manufacturing bags with gussets

Publications (2)

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EP1754596A1 true EP1754596A1 (en) 2007-02-21
EP1754596B1 EP1754596B1 (en) 2007-10-10

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EP (1) EP1754596B1 (en)
AT (1) ATE375247T1 (en)
DE (1) DE502005001691D1 (en)
ES (1) ES2292027T3 (en)
PL (1) PL1754596T3 (en)

Cited By (4)

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WO2008048640A2 (en) 2006-10-17 2008-04-24 The Hudson-Sharp Machine Co. Method of making bag with interrupted side gussets
WO2008120062A2 (en) * 2007-03-30 2008-10-09 Bordi Carlo S.R.L. Process and apparatus for making bags and plastic film bag
WO2009128993A2 (en) * 2008-04-14 2009-10-22 Illinois Tool Works Inc. Various gusset seals or treatments for reclosable packages
US20140187401A1 (en) * 2012-12-28 2014-07-03 Totani Corporation Plastic bag making apparatus

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008064308A1 (en) 2008-12-20 2010-07-01 B & B - Maf Gmbh & Co. Kg Method for processing material web for packaging containers made of flexible material, particularly for side folded bags of plastic film, involves forming rectangular partial sections of side folds of packaging wall by flat pieces
DE102010051065A1 (en) 2010-11-12 2012-05-16 B & B - Maf Gmbh & Co. Kg Packaging container e.g. side-folded plastic bags for bulk and filling materials, has side folds in which outside of preset portion is placed on outside of cover piece while half of inner side and cover piece are cohesively connected
HUE029237T2 (en) 2013-10-30 2017-02-28 Mondi Halle Gmbh Method for the production of film bags
HUE034309T2 (en) 2014-09-16 2018-02-28 Mondi Ag Side gusseted bag and method for producing a side gusseted bag
DE102014116820A1 (en) 2014-11-18 2016-05-19 Mondi Consumer Packaging Technologies Gmbh Side gusseted bag and method of making a gusseted bag
DE102016109870A1 (en) 2016-05-30 2017-12-14 B&B Verpackungstechnik GmbH Process for the production of foil bags and foil bags

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DE1238650B (en) * 1962-01-13 1967-04-13 Hans Lissner Method and device for producing a packaging container made of plastic and having a rectangular shape when filled
EP0834454A1 (en) * 1997-06-03 1998-04-08 Seisan Nippon Sha, Ltd. Bags with plastic fasteners and method of manufacturing the same
US6068585A (en) 1997-01-02 2000-05-30 Ouchi; Toshikatu Gored packing bag with an opening and closing fastener and method for producing same
US20010038721A1 (en) * 1997-01-29 2001-11-08 Flexico-France Method and apparatus for manufacturing packaging bags, and bags obtained thereby
US20020103067A1 (en) * 2001-01-26 2002-08-01 Flexico-France Bags with gussets, method and machine for manufacturing them
US20040258332A1 (en) * 2002-07-24 2004-12-23 Mikio Totani Plastic bag and bag making machine therefor

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DE1238650B (en) * 1962-01-13 1967-04-13 Hans Lissner Method and device for producing a packaging container made of plastic and having a rectangular shape when filled
US6068585A (en) 1997-01-02 2000-05-30 Ouchi; Toshikatu Gored packing bag with an opening and closing fastener and method for producing same
US20010038721A1 (en) * 1997-01-29 2001-11-08 Flexico-France Method and apparatus for manufacturing packaging bags, and bags obtained thereby
EP0834454A1 (en) * 1997-06-03 1998-04-08 Seisan Nippon Sha, Ltd. Bags with plastic fasteners and method of manufacturing the same
US20020103067A1 (en) * 2001-01-26 2002-08-01 Flexico-France Bags with gussets, method and machine for manufacturing them
US20040258332A1 (en) * 2002-07-24 2004-12-23 Mikio Totani Plastic bag and bag making machine therefor

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008048640A2 (en) 2006-10-17 2008-04-24 The Hudson-Sharp Machine Co. Method of making bag with interrupted side gussets
EP2077946A2 (en) * 2006-10-17 2009-07-15 The Hudson-Sharp Machine CO. Method of making bag with interrupted side gussets
EP2077946A4 (en) * 2006-10-17 2010-09-15 Hudson Sharp Machine Co Method of making bag with interrupted side gussets
US8137254B2 (en) 2006-10-17 2012-03-20 Hudson-Sharp Machine Co. Method of making bag with interrupted side gussets
WO2008120062A2 (en) * 2007-03-30 2008-10-09 Bordi Carlo S.R.L. Process and apparatus for making bags and plastic film bag
WO2008120062A3 (en) * 2007-03-30 2008-11-27 Bordi Carlo S R L Process and apparatus for making bags and plastic film bag
WO2009128993A2 (en) * 2008-04-14 2009-10-22 Illinois Tool Works Inc. Various gusset seals or treatments for reclosable packages
WO2009128993A3 (en) * 2008-04-14 2009-12-17 Illinois Tool Works Inc. Various gusset seals or treatments for reclosable packages
US20140187401A1 (en) * 2012-12-28 2014-07-03 Totani Corporation Plastic bag making apparatus
US10369759B2 (en) 2012-12-28 2019-08-06 Totani Corporation Plastic bag making apparatus

Also Published As

Publication number Publication date
ES2292027T3 (en) 2008-03-01
PL1754596T3 (en) 2008-03-31
EP1754596B1 (en) 2007-10-10
DE502005001691D1 (en) 2007-11-22
ATE375247T1 (en) 2007-10-15

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