WO2001023263A1 - Procede de fabrication de sacs en plastique et sacs en plastique ainsi fabriques - Google Patents

Procede de fabrication de sacs en plastique et sacs en plastique ainsi fabriques Download PDF

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Publication number
WO2001023263A1
WO2001023263A1 PCT/EP2000/008530 EP0008530W WO0123263A1 WO 2001023263 A1 WO2001023263 A1 WO 2001023263A1 EP 0008530 W EP0008530 W EP 0008530W WO 0123263 A1 WO0123263 A1 WO 0123263A1
Authority
WO
WIPO (PCT)
Prior art keywords
friction
bags
bag
areas
high coefficient
Prior art date
Application number
PCT/EP2000/008530
Other languages
English (en)
Inventor
Renato Rimondi
Angelo Cappi
Original Assignee
A.W.A.X. Progettazione E Ricerca S.R.L.
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 A.W.A.X. Progettazione E Ricerca S.R.L. filed Critical A.W.A.X. Progettazione E Ricerca S.R.L.
Priority to EP00962420A priority Critical patent/EP1214253A1/fr
Publication of WO2001023263A1 publication Critical patent/WO2001023263A1/fr

Links

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
    • B65D33/007—Details of, or accessories for, sacks or bags for facilitating the separation of the two walls, e.g. walls of inequal height, tabs; for maintaining the mouth of the sack or bag open
    • 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
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/742—Coating; Impregnating; Waterproofing; Decoating

Definitions

  • the invention relates to devices of the type described in Italian patent application no. 22456 A/89 of 21 November 1989 in the name of the present applicant, which devices are designed to be positioned at the checkouts of supermarkets or other similar sales outlets and comprise a reel consisting of a continuous web of plastic bags connected together one after the other by means of tear lines and including means which unwind the said reel and transfer the continuous web of bags to superjacent means which detach the lead bag from the continuous web, position it vertically, open it and support it while it is filled with the products that have been purchased, which are inserted via a hopper located immediately above the open bag. Discharge means then remove the full bag from the filling station and trigger the positioning of the next bag in the said station.
  • the means which open the bag comprise a pair of opposing gripping members which can move horizontally closer together and then away from each other.
  • Each gripping member is fitted with a jaw carrying rubber pads positioned at regular intervals and in line with the corresponding gaps between the teeth of the opposite jaw which is comb-shaped.
  • the gripping members are open as they are moved closer together and, at the end of the advance stroke, the jaws of these gripping members interlock both horizontally and vertically so that a top portion of the plastic bag is folded zigzag fashion between the gripping members.
  • the gripping members close automatically such that they grip the portion of bag placed between them.
  • the external surfaces of the opposite faces of the bag come into contact with the rubber pads on the jaws of the two gripping members, which have a high coefficient of friction relative to the film from which the bag is made, so that when the two gripping members are moved away from each other and held in the closed position, the jaws of one gripping member slip out from the jaws of the other gripping member and each gripping member takes a portion of the opposite face of the bag with it, while the internal surfaces of the two faces of the said bag slide over each other easily as a result of the low coefficient of friction of the film from which the bag is made.
  • the prior art envisages the use of powder additives which reduce the coefficient of friction of the superimposed surfaces of the said bag. These additives tend to accumulate on the rubber pads of the gripping members which open the bags so that, and partly also on account of the gradual ageing of the rubber itself, the gripping members tend, over time, to lose the gripping properties needed to entrain and open the opposite faces of the plastic bag, resulting in the obvious consequences.
  • - Fig. 2 illustrates details of an improved plastic bag according to the invention, in cross section on the plane ll-ll in Figure 1 ;
  • - Figs 3 and 4 illustrate a side view, with some parts in section, of the pair of gripping members of the known device for opening a plastic bag, during successive stages of the cycle for opening the said bag;
  • FIG. 5 illustrates a perspective view of the top of an improved plastic bag which has been opened by the gripping members shown in Figures 3 and 4.
  • the reference 3 denotes the plastic bags in question, positioned one after the other so as to form a continuous web which is unwound from a reel B.
  • the base of each bag is connected to the handles M of the next bag by means of tear lines L.
  • each bag has side gussets S, S'.
  • the opposite faces 103, 203 of the bag - at least on the outside and on the top part designed to engage with the gripping members of the opening device mentioned above - are treated across their entire width or preferably over symmetrically positioned areas 1 , 1 ' of suitable size in any manner such that the coefficient of friction of these areas is greater than that of the material from which the said bag is made.
  • the frictional areas 1 , 1 ' are preferably located on that portion of the faces 103, 203 found between the handles M but not on the handles themselves.
  • the treatment advantageously consists in applying a preferably transparent varnish having a high coefficient of friction to the said areas 1 , 1 ' at any point during the bag production cycle, for example during the stage in which the bag is customized by means of printing. It goes without saying, however, that in place of the abovementioned areas 1 , 1 ' text and/or a decorative and/or advertising image could be applied using a suitable frictional varnish.
  • the gripping members Once the gripping members have interlocked, they close and the bag is grasped by them, held by three consecutive portions folded into a zigzag.
  • One portion of the bag is held between the rubber pads 87 of the jaw 83 of P1 and the toothed jaw 86 of the gripping member P2, a subsequent portion is held between the toothed jaw 86 of P2 and the toothed jaw 84 of P1 , and a third portion of the bag is held between the said jaw 84 of P1 and the pads 88 of the jaw 85 of P2.
  • the areas 1 , 1 ' having a high coefficient of friction are positioned such that one is held between the jaws of the gripping member P1 and the other between the jaws of the gripping member P2, as illustrated in Figure 3 by the thick dashed line.
  • the portion of the bag face 103 bearing the frictional areas 1 remains securely attached to the gripping member P1
  • the portion of the bag face 203 bearing the frictional areas 1 ' remains securely attached to the gripping member P2
  • the faces 103 and 203 slide over each other easily as a result of the low coefficient of friction of their internal and initially superimposed surfaces.
  • the jaws of these gripping members snap shut and trap those portions of the faces 103 and 203 gripped between them and the bag is opened as illustrated in Figure 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Bag Frames (AREA)
  • Making Paper Articles (AREA)

Abstract

Pendant une phase du cycle de fabrication des sacs en plastique, par exemple, pendant la phase qui consiste à les personnaliser avec de la peinture, la partie supérieure des côtés (103, 203) initialement visibles de chaque sac (3)-partie adaptée pour s'engager avec les éléments d'ouverture et de préhension- est recouverte à l'extérieur par des fines couches (1, 1') de vernis présentant un coefficient de frottement élevé de façon à garantir que les côtés opposés du sac soient saisis correctement par lesdits éléments de préhension.
PCT/EP2000/008530 1999-09-24 2000-08-31 Procede de fabrication de sacs en plastique et sacs en plastique ainsi fabriques WO2001023263A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00962420A EP1214253A1 (fr) 1999-09-24 2000-08-31 Procede de fabrication de sacs en plastique et sacs en plastique ainsi fabriques

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO99A000512 1999-09-24
IT1999BO000512A IT1310444B1 (it) 1999-09-24 1999-09-24 Metodo per la produzione di borse in plastica adatte per dispositivid'alimentazione e d'apertura automatica operanti in corrispondenza

Publications (1)

Publication Number Publication Date
WO2001023263A1 true WO2001023263A1 (fr) 2001-04-05

Family

ID=11344242

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/008530 WO2001023263A1 (fr) 1999-09-24 2000-08-31 Procede de fabrication de sacs en plastique et sacs en plastique ainsi fabriques

Country Status (3)

Country Link
EP (1) EP1214253A1 (fr)
IT (1) IT1310444B1 (fr)
WO (1) WO2001023263A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009108078A2 (fr) * 2008-02-26 2009-09-03 Novica Paunovic Sac plastique à champs de frottement pour l’ouverture, son procédé et son dispositif de fabrication
WO2010017891A1 (fr) * 2008-08-11 2010-02-18 Philip Morris Products S.A. Contenant à surface tactile
US9340325B2 (en) 2014-01-16 2016-05-17 Josephine Pontoriero Apparatus to facilitate separation of layers of material

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2085402A (en) * 1980-10-15 1982-04-28 Huemer Franz Sack
JPH03241092A (ja) * 1990-02-15 1991-10-28 Sakata Corp すべり止めニス及びそれを用いたすべり止め加工方法並びにすべり止め加工を施した段ボールの製造方法
GB2271756A (en) * 1992-10-20 1994-04-27 Welton Packaging Limited Plastic bags with means facilitating opening
JPH0826299A (ja) * 1994-07-13 1996-01-30 Hiroshi Takemoto 買物袋・ごみ袋の口開け装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2085402A (en) * 1980-10-15 1982-04-28 Huemer Franz Sack
JPH03241092A (ja) * 1990-02-15 1991-10-28 Sakata Corp すべり止めニス及びそれを用いたすべり止め加工方法並びにすべり止め加工を施した段ボールの製造方法
GB2271756A (en) * 1992-10-20 1994-04-27 Welton Packaging Limited Plastic bags with means facilitating opening
JPH0826299A (ja) * 1994-07-13 1996-01-30 Hiroshi Takemoto 買物袋・ごみ袋の口開け装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 199149, Derwent World Patents Index; Class A82, AN 1991-358622, XP002154687 *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 05 31 May 1996 (1996-05-31) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009108078A2 (fr) * 2008-02-26 2009-09-03 Novica Paunovic Sac plastique à champs de frottement pour l’ouverture, son procédé et son dispositif de fabrication
WO2009108078A3 (fr) * 2008-02-26 2009-11-26 Novica Paunovic Sac plastique à champs de frottement pour l’ouverture, son procédé et son dispositif de fabrication
WO2010017891A1 (fr) * 2008-08-11 2010-02-18 Philip Morris Products S.A. Contenant à surface tactile
US8283008B2 (en) 2008-08-11 2012-10-09 Philip Morris Usa Inc. Container with tactile surface
US9340325B2 (en) 2014-01-16 2016-05-17 Josephine Pontoriero Apparatus to facilitate separation of layers of material

Also Published As

Publication number Publication date
ITBO990512A0 (it) 1999-09-24
EP1214253A1 (fr) 2002-06-19
IT1310444B1 (it) 2002-02-13
ITBO990512A1 (it) 2001-03-24

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