EP2868466B1 - Procédé de fabrication de sachets de feuilles - Google Patents

Procédé de fabrication de sachets de feuilles Download PDF

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Publication number
EP2868466B1
EP2868466B1 EP13190923.6A EP13190923A EP2868466B1 EP 2868466 B1 EP2868466 B1 EP 2868466B1 EP 13190923 A EP13190923 A EP 13190923A EP 2868466 B1 EP2868466 B1 EP 2868466B1
Authority
EP
European Patent Office
Prior art keywords
gussets
produced
front side
bag
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.)
Not-in-force
Application number
EP13190923.6A
Other languages
German (de)
English (en)
Other versions
EP2868466A1 (fr
Inventor
Detlef Stöppelmann
Alfons Kruse
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 Halle GmbH
Original Assignee
Mondi 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 Mondi Halle GmbH filed Critical Mondi Halle GmbH
Priority to HUE13190923A priority Critical patent/HUE029237T2/en
Priority to EP13190923.6A priority patent/EP2868466B1/fr
Publication of EP2868466A1 publication Critical patent/EP2868466A1/fr
Application granted granted Critical
Publication of EP2868466B1 publication Critical patent/EP2868466B1/fr
Not-in-force 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
    • 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
    • B31B2170/00—Construction of flexible containers
    • B31B2170/20—Construction of flexible containers having multi-layered walls, e.g. laminated or lined
    • 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
    • B31B2170/00—Construction of flexible containers
    • B31B2170/30—Construction of flexible containers having corrugated or pleated walls
    • 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
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/813—Applying closures
    • B31B70/8131—Making bags having interengaging closure elements
    • B31B70/8133—Applying the closure elements in the cross direction

Definitions

  • the present invention relates to a method of producing foil bags having first and second front sides, two side gussets inserted V-shaped between the front sides in a bag longitudinal direction, and an opening on a bag head, the front sides and the side pleats being in common a multilayer film are formed, wherein the gussets terminate below the opening at the bag head and wherein upper ends of the gussets are closed.
  • the method according to the invention is intended, in particular, to produce flat, prefabricated foil pouches, which are subsequently charged and sealed with filling material in a pouch filling device, wherein the filling is usually carried out on a bag head. After filling, the film bag is closed by a heat seal and can then be ripped open again on first use.
  • the film bag in question are formed from a multilayer film
  • the multilayer film is usually heat-sealable only on one of its outer layers.
  • These heat-sealable outer layer is arranged on the inside during the formation of the film bag and thus allows the formation of the bag by heat sealing and the attachment of functional elements such as a reclosure.
  • the other outer layer arranged on the outside of the pouches remains unimpaired because it does not melt, at least at the set heat-sealing temperatures.
  • the two front sides and the interposed gussets can be fed as separate films and then connected.
  • the foil pouch or a strand from which individual foil pouches can be separated is then composed, as it were, of several foil sections or foil strips.
  • the individual elements can be modified or adapted before merging.
  • the present invention relates to a method in which the foil bags share the two front sides and the two side folds are formed from a multilayer film substantially by folding. This results in the advantage that not several parts must be supplied and connected to each other.
  • the design possibilities of the bag are limited to a certain extent because it is always worked with a continuous, continuous web or a continuous, coherent strand.
  • Corresponding methods for the production of film bags with gussets are made EP 1 754 596 B1 . US 2002/0103067 A1 and WO 2008/120062 A2 known.
  • the ends formed by the punched folds in the region of the bag head are sealed either by respectively associated foil tape, a transversely extending film strip or a reclosure.
  • the invention has for its object to provide a method for the production of foil bags, which allows in a simple manner the formation of foil bags by folding, which are closed by a punched shortened gussets safely.
  • the side folds are folded obliquely onto themselves at one of their ends formed by the cutouts, so that the ends formed by punched-out lines are aligned along the longitudinal direction after folding over, the folded ends are then sealed.
  • the ends can already be fixed so that they are held in position during the further handling of the strand.
  • a tight integration into an edge of the strand or of the pouches to be formed therefrom preferably takes place only during the production of longitudinal sealing seams.
  • the punches are interruptions of the gussets, wherein at least the end of the gussets is folded as described, which lies in a finished foil bag below the bag head.
  • the film web is transported either continuously or intermittently in a feed direction, which usually corresponds to the longitudinal direction of the bag formed in retrospect.
  • the punches are seen in the longitudinal direction formed at the same height with a distance in the transverse direction exactly where later the gussets are formed.
  • the first front side can be formed approximately centrally on the film web.
  • the edges of the film web then come together on the surface of the second front side and are to be connected there by a separate longitudinal sealing seam.
  • a side fold, the first front side, the second side fold and finally the second front side are formed up to the other edge of the film web.
  • the width of the punched holes in the transverse direction is preferably smaller than twice the width of the V-shaped inserted between the front side gussets.
  • the edge of the punching falls exactly in a folded edge. There is then under certain circumstances an increased risk that the film web or the strand formed therefrom will be damaged during folding by folding knife.
  • the width of the punched holes is smaller than twice the width of the V-shaped inserted between the front side gussets and if the punching centered centered with respect to the gusset, remains at the folding edges always at least a narrow portion of the film, which optionally subsequently by a trimming of the longitudinal edges can be removed. Such trimming is also referred to as trimming.
  • the skein In order to be able to easily fold over the ends of the gussets arranged below the bag head, the skein can be guided past a folding device, which lifts and folds the end of the gusset at an inner folding edge. If the strand is transported continuously or intermittently in the feed direction, such folding over, depending on the configuration of the folding device provided for this purpose, can also be achieved by fixed, simply designed folding knives or the like. By feeding the strand, the ends of the gussets are then folded over immediately.
  • the folding is expediently such that the folded ends are placed from above on the associated side fold. After the formation of the second front side, the folded-over ends are thus arranged between the respective side fold and the second front side.
  • the ends are expediently folded at an angle of 45 °, so that the ends after folding exactly along the longitudinal direction are aligned.
  • the longitudinal sealing seam which closes the strand circumferentially has to be designed continuously in order to be able to close the bag. Further longitudinal sealing seams do not necessarily have to be carried out. In principle, it is sufficient if the folded-over end of the gussets and the two front sides are sealed in the region of the punched-out. Preferably, however, longitudinal sealing seams are produced, which extend along the entire strand.
  • the folded ends of the gussets in the transverse direction are at least slightly opposite the edge of the skein.
  • a subsequent trimming may be appropriate.
  • the folding over of the ends of the gussets formed by the stamping is in particular provided in the transverse direction in the region of the punched-out part to use extending reclosure.
  • a reclosure with profile strips is used, which can be locked together.
  • a locking can be done, for example, by transversely extending grooves and teeth or in the manner of a hook and loop fastener.
  • a zipper closure can be provided on the upper edge of the bag a reclosure with latchable profile strips that can be actuated by a slider.
  • Corresponding closures are known in practice as so-called slider closures.
  • a multilayer laminated film is preferably supplied, which in addition to the outer layer of weldable thermoplastic material has an opposite outer layer which is non-weldable at a predetermined heat sealing temperature.
  • the strand can be formed by heat sealing, without the appearance of the film bag is impaired.
  • internal printing can also be provided.
  • laminated films with a heat-sealable outer layer of polyethylene, which is arranged on the inside of the bag, while the opposite outer layer can be formed, for example, from polyethylene terephthalate (PET) or biaxially oriented polypropylene (BO-PP), are suitable.
  • PET polyethylene terephthalate
  • BO-PP biaxially oriented polypropylene
  • the Fig. 1 shows a foil bag, which is produced by the method according to the invention. For clarity, an upper corner of the foil bag is shown broken.
  • the film bag comprises a first front side 1 and a second front side 2, between which two V-shaped inserted side pleats 3 are arranged.
  • the foil bag is not closed on a bag head 4 and has there corresponding opening.
  • the flattened with the inserted gussets 3 foil bag is provided as a prefabricated bag (pre-made bag) for subsequent filling.
  • a reclosure 5 is provided in the region of the bag head 4, which is formed as a zipper closure of two interlockable profile strips 6.
  • the gussets 3 are offset from the bag head 4.
  • one end 7 of the gussets is in each case folded over and integrated into an associated longitudinal sealing seam 8 on the edge of the bag.
  • the two lateral folds 3 are connected over their entire length to the first front side 1 and the second front side 2 in the illustrated embodiment.
  • the ends 7 are turned over in a simple manner at an angle of 45 °.
  • the Ends 7 are therefore arranged between the associated side fold 3 and the front wall 2.
  • Fig. 2a and 2 B show the inventive method for the preparation of in Fig. 1 illustrated foil bag.
  • the distance of the punch-outs 10 in the longitudinal direction also corresponds to the length of a film bag to be formed.
  • the punch-outs 10 are introduced in the region of the gussets 3 to be subsequently formed, wherein the width of the punch-outs a is smaller than twice the width b of the side folds 3 to be formed in a V-shape between the front sides 1, 2.
  • a reclosure 5 is supplied and placed between the punched holes 10 on the first front side 1. It may be appropriate to fix the reclosure 5 at least against slipping.
  • the film web 9 is then folded in a folding station, not shown, such that a strand 12 with the gussets 3 and the first front side first is formed below the gussets 3.
  • the section from which the second front side 2 is subsequently formed is then still unfolded next to one of the two lateral folds 3.
  • the advancing in the transport direction end 7 of the gussets 3 is folded over at an angle to itself, so that the ends formed by the punching 7 of the gussets 3 are aligned along the longitudinal direction.
  • the folding over of the ends 7 of the gussets 3 can be done by a folding device, not shown, which causes alone by the propulsion of the strand 12 in a particularly simple manner, the folding. After folding over the ends 7, these can be fixed or prefixed in this position.
  • the second front side 2 is formed, which also covers the gussets 3.
  • longitudinal sealing seams 8 are produced, wherein the longitudinal sealing seams 8 connect the side folds 3 to the first front side 1 and the second front side 2.
  • the longitudinal sealing seams 8 between the gussets 3 and the second front side 2 also bind the folded-over ends 7.
  • the strand 12 is where the edges of the film web 9 lie one above the other, closed by the associated longitudinal sealing seam 8 circumferentially.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Bag Frames (AREA)

Claims (10)

  1. Procédé de fabrication de sacs en film, qui présente une première et une seconde faces frontales (1, 2), deux plis latéraux (3) insérés en forme de V entre les faces frontales (1, 2) et s'étendant dans un sens longitudinal, et une ouverture au niveau d'une tête du sac (4), les faces frontales (1, 2) et les plis latéraux (3) étant constitués ensemble d'un film multicouche, les plis latéraux (3) se terminant en-dessous de l'ouverture au niveau de la tête du sac (4) et les extrémités supérieures des plis latéraux (3) étant fermées, comportant les étapes opératoires suivantes :
    a) une bande de film (9) du film multicouche qui présente une couche extérieure en matière thermoplastique soudable est préparée,
    b) des découpes en forme de fenêtres (10) sont pratiquées dans la bande de film (9) au niveau de sections où les têtes de sac (4) des sacs en film sont ensuite formées,
    c) la bande de film (9) est guidée dans une station de pliage dans laquelle, par pliage de la bande de film (9), une chaîne (12) comportant les plis latéraux (3) et la première face frontale (1) est constituée en dessous des plis latéraux (3),
    caractérisé par les autres étapes opératoires suivantes :
    d) au niveau de la chaîne (12), les plis latéraux (3) sont repliés à une de leurs extrémités (7) constituées par les découpes (10) obliquement sur eux-mêmes, de sorte que les extrémités (7) formées par le découpage sont orientées suivant le sens longitudinal après repliement,
    e) après le repliement des extrémités (7) des plis latéraux (3), par nouveau pliage de la chaîne (12) au niveau d'au moins un des plis latéraux (3), est constituée la seconde face frontale (2) qui recouvre les plis latéraux (3),
    f) après la formation de la seconde face frontale (2), sont créées des sutures de scellement longitudinal (8) à l'aide desquelles la chaîne (12) est fermée sur sa circonférence et les extrémités repliées (7) des plis latéraux (3) sont respectivement scellées en un bord de sac,
    g) la chaîne (12) est sectionnée en sacs en film individuels de manière à ce que l'ouverture se trouve au niveau de la découpe (10) au-dessus des plis latéraux repliés (3).
  2. Procédé selon la revendication 1, dans lequel la seconde face frontale (2) est constituée d'une section de film continu et dans lequel la suture de scellement longitudinal fermant la chaîne (12) sur sa circonférence (8) s'étend le long d'un bord de sac et scelle aussi extrémité (7) d'un des plis latéraux (3).
  3. Procédé selon la revendication 1 ou 2, dans lequel des sutures de scellement longitudinal (8) sont réalisées au niveau de la chaîne (12).
  4. Procédé selon la revendication 3, dans lequel les sutures de scellement longitudinal (8) réalisées au niveau des bords du sac présentent un évasement au niveau des extrémités repliées (7).
  5. Procédé selon une des revendications 1 à 4, dans lequel, avant la formation de la seconde face frontale (2), un système de refermeture (5) est posé sur la première face frontale (1).
  6. Procédé selon une des revendications 1 à 5, dans lequel la chaîne (12), pour replier les extrémités (7) des plis latéraux (3), est passée devant un dispositif de pliage qui soulève et transfère l'extrémité (7) des plis latéraux au niveau d'un bord de pliage interne (11).
  7. Procédé selon une des revendications 1 à 6, dans lequel les extrémités (7) des plis latéraux de s'assécher (3) sont repliées de manière à ce que les extrémités repliées (7) soient disposées entre les plis latéraux respectifs (3) et la seconde face frontale (2).
  8. Procédé selon une des revendications 1 à 7, dans lequel la chaîne (12), avant le découpage en sacs en film individuels, est coupée au niveau de ses bords longitudinaux.
  9. Procédé selon une des revendications 1 à 8, dans lequel une largeur définie (a) dans le sens transversal des découpes est inférieure au double de la largeur (b) des plis latéraux (3) insérés en forme de V entre les faces frontales (1, 2).
  10. Procédé selon une des revendications 1 à 9, dans lequel on achemine en tant que bande de film (9) un film plaqué multicouche qui, en cas de température de thermoscellage prédéfinie, présente, outre la couche extérieure en matière thermoplastique soudable, une couche extérieure opposée non soudable.
EP13190923.6A 2013-10-30 2013-10-30 Procédé de fabrication de sachets de feuilles Not-in-force EP2868466B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
HUE13190923A HUE029237T2 (en) 2013-10-30 2013-10-30 Method for producing foil pouches
EP13190923.6A EP2868466B1 (fr) 2013-10-30 2013-10-30 Procédé de fabrication de sachets de feuilles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13190923.6A EP2868466B1 (fr) 2013-10-30 2013-10-30 Procédé de fabrication de sachets de feuilles

Publications (2)

Publication Number Publication Date
EP2868466A1 EP2868466A1 (fr) 2015-05-06
EP2868466B1 true EP2868466B1 (fr) 2016-04-06

Family

ID=49510010

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13190923.6A Not-in-force EP2868466B1 (fr) 2013-10-30 2013-10-30 Procédé de fabrication de sachets de feuilles

Country Status (2)

Country Link
EP (1) EP2868466B1 (fr)
HU (1) HUE029237T2 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20017182U1 (de) 2000-10-06 2002-02-14 Bischof Und Klein Gmbh & Co Kg Seitenfaltenbeutel aus flexiblen schweißbarem Material
FR2820076B1 (fr) 2001-01-26 2003-07-25 Flexico France Sarl Sachets a soufflets, procede et machine de fabrication a cet effet
EP1524195B1 (fr) 2002-07-24 2013-03-13 Totani Corporation Sac en plastique et machine de fabrication de sacs pour un tel sac
DE202004006857U1 (de) 2004-04-29 2005-09-08 Bischof + Klein Gmbh & Co. Kg Seitenfaltenbeutel
EP1838521B1 (fr) * 2004-12-23 2011-02-09 Marco Reggi Procede de fabrication d'un sac
FR2882683B1 (fr) 2005-03-02 2008-08-15 Autobar Flexible Packaging Sa Procede de fabrication d'un sac a soufflets a partir d'un film en matiere plastique et le sac obtenu
DE102005026149B4 (de) * 2005-06-06 2011-05-26 Nordenia Deutschland Halle Gmbh Verfahren zur Herstellung von Folienbeuteln
ES2292027T3 (es) 2005-08-19 2008-03-01 Nordenia Deutschland Halle Gmbh Procedimiento para fabricar bolsas de material laminar con solapas laterales.
JP4806565B2 (ja) * 2005-12-19 2011-11-02 トタニ技研工業株式会社 プラスチック袋
ITBO20070230A1 (it) 2007-03-30 2008-09-30 Bordi Carlo S R L Procedimento e apparecchiatura per la realizzazione di sacchetti e sacchetto in film plastico.
AU2008364073B2 (en) 2008-11-13 2011-08-25 Totani Corporation Plastic bag making apparatus

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Publication number Publication date
HUE029237T2 (en) 2017-02-28
EP2868466A1 (fr) 2015-05-06

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