EP0807583A1 - Web of interconnected plastic bags and bag manufactured from this web - Google Patents

Web of interconnected plastic bags and bag manufactured from this web Download PDF

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Publication number
EP0807583A1
EP0807583A1 EP97201373A EP97201373A EP0807583A1 EP 0807583 A1 EP0807583 A1 EP 0807583A1 EP 97201373 A EP97201373 A EP 97201373A EP 97201373 A EP97201373 A EP 97201373A EP 0807583 A1 EP0807583 A1 EP 0807583A1
Authority
EP
European Patent Office
Prior art keywords
concertina
bag
fold
web
longitudinal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97201373A
Other languages
German (de)
English (en)
French (fr)
Inventor
Herman Flim
Frederik Beenen
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.)
Combipac BV
Original Assignee
Wavin BV
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 Wavin BV filed Critical Wavin BV
Publication of EP0807583A1 publication Critical patent/EP0807583A1/en
Withdrawn legal-status Critical Current

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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
    • B65D33/002—Rolls, strips or like assemblies of bags

Definitions

  • the invention relates to a web of interconnected bags made of plastic film material, each bag in the web comprising a tubular film part which is provided, on two longitudinal sides situated opposite one another, with concertina folds, which each comprise one inner and two outer longitudinal concertina-fold edges, which delimit a first and a second concertina-fold part, each bag being provided, in the region of one end, with a first transverse bottom seam, which extends in the transverse direction and over the entire width of the bag, and, on both longitudinal sides, with two first concertina-fold part seams, which extend obliquely from the outer longitudinal concertina-fold edges towards the inner longitudinal concertina-fold edge and towards the end in question, as far as the first transverse bottom seam, and being provided, in the region of the other end, on both longitudinal sides, with two second concertina-fold part seams, which extend obliquely from the outer longitudinal concertina-fold edges towards the inner longitudinal concertina-fold edge and towards the end in question, and the web being provided,
  • a web of bags of this kind is known, inter alia, from NL-A-7,903,733 in the name of the applicant.
  • the individual bags are torn off from the web, filled and, after the filling operation, closed on the filling side by means of a second transverse bottom seam, which is similar to the first transverse bottom seam at the opposite end.
  • the filled bags can easily be made into a block and stacked.
  • the object of the invention is to provide a solution to this problem.
  • each bag viewed in the longitudinal direction, is provided, in the region of the first or second oblique concertina-fold part seams, with a second wall weakening, which extends, in the transverse direction of the bag, from the outer longitudinal concertina-fold edges on one of the two longitudinal sides of the bag over at least part of the width of the bag.
  • the invention also relates to a bag manufactured from the web according to the invention.
  • Fig. 1 shows a web 4 of bags according to the invention which has been partly unrolled from a roll 2.
  • the web 4 of bags which is manufactured from a tubular film, comprises bags 8 which are interconnected via a connection with a first wall weakening 6.
  • Each bag 8 in the web 4 comprises a tubular film part which is provided, on two longitudinal sides situated opposite one another, with concertina folds 10, which each comprise one inner 12 and two outer longitudinal concertina-fold edges 14, which delimit a first 16 and a second concertina-fold part 18.
  • each folded-flat bag 8 is provided, in the region of one end 20, with a first transverse bottom seam 22, which extends in the transverse direction and over the entire width of the bag, and, on the two longitudinal sides, with two first concertina-fold part seams 24, 24', which extend obliquely from the outer longitudinal concertina-fold edges 14 towards the inner longitudinal concertina-fold edge 12 and towards the end in question, as far as the first transverse bottom seam 22, the seam 24 connecting the film layers of the concertina-fold part 16 to one another and the seam 24' connecting the film layers of the concertina-fold part 18 to one another.
  • each bag 8 is provided, on both longitudinal sides, with two second concertina-fold part seams 26, 26', which extend obliquely from the outer longitudinal concertina-fold edges 14 towards the inner longitudinal concertina-fold edge 12 and towards the end in question, the seam 26 connecting the film layers of the concertina-fold part 16 to one another and the seam 26' connecting the film layers of the concertina-fold part 18 to one another.
  • first concertina-fold part seams 24, 24' are connected, via connection seams 28, 28' running parallel to the inner concertina-fold longitudinal edge 12, to the second concertina-fold part seams 26, 26' of an adjacent bag, the seem 28 connecting the film layers of the concertina-fold part 16 to one another and the seam 28' connecting the film layers of the concertina-fold part 18 to one another.
  • connection seams 28, 28' it is also possible to omit the connecting seams 28, 28'.
  • each bag 8 viewed in the longitudinal direction, is provided, in the region of the first concertina-fold part seams 24, 24' with a second wall weakening 30, which extends in the transverse direction of the bag, from the outer longitudinal concertina-fold edges 14 on the lower longitudinal side of the bag in the drawing, as far as the oblique concertina-fold part seams 24, 24' on the other longitudinal side, and in both film layers, which rest on top of one another, of the folded-flat bag.
  • the web is cut through completely at the location of the second weakened wall weakening 30.
  • the second wall weakening 30 may have other, different embodiments, as shown in Figs. 3a-g.
  • the wall weakening 30a or 30b respectively, extends, from the outer longitudinal concertina-fold edges 14 on one of the two longitudinal sides of the folded-flat bag, over part of the width of the bag.
  • the wall weakening 30c, 30d, 30e, 30f or 30g respectively, extends over the entire width of the folded-flat bag.
  • the embodiments of Figs. 3c-g are not preferred, however, since when the bag is torn along the second wall weakening 30 a tear strip which is entirely separate from the rest of the bag is formed.
  • the film is weakened, in the region between the oblique concertina-fold part seams 24, 24' on either side of the bag, to such an extent that the tensile strength of the film at that location is between about 50% and about 70%, and preferably about 60%, of the unweakened film.
  • the filled and closed bag on the one hand has sufficient strength and does not tear open if dropped from a height of two metres and on the other hand can easily be torn open along the second wall weakening for opening purposes.
  • a weakening of this kind is shown by a dotted line.
  • the film may be weakened (indicated by a dotted line) or cut through completely(indicated by a dashed line) on either side of the bag, in the same manner as between the concertina-fold part seams.
  • the film may also be cut through completely (indicated by a solid line) in the region in question.
  • the second wall weakening 30 may be arranged in the region of the second concertina-fold part seams 26, 26'.
  • the nature of the second wall weakening 30 depends on the material to be packaged in the bag. If material which needs to breath is to be packaged in the bag, the second wall weakening 30 will preferably comprise, at least in the region between the oblique concertina-fold part seams 24, 24' and 26, 26', respectively, on either side of the bag, a series of minuscule holes in the film. If, however, the material to be packaged in the bag has to remain completely dry, the second wall weakening 30 in the region in question will comprise a partial, seen in the thickness direction of the film, cut through the film.
  • the second wall weakening should be such that the requirement that a filled bag does not tear open in the event of being dropped from a height of two metres is fulfilled. Also, the bag should not tear at the location of the second wall weakening during handling of the bag before, during and after filling.
  • Fig. 4 shows a filled bag 8, which has been closed on the filling side by a second bottom seam 31, made into a block and has a second wall weakening 30 of the type shown in Fig. 2.
  • Fig. 5 shows a corner portion of this bag, on an enlarged scale. It can be clearly seen that the second wall weakening 30 extends in both film layers, which are situated on top of one another in the folded-flat bag.
  • a bag of this kind can easily be opened without using any special equipment, such as a knife, scissors or other sharp object, by gripping and pulling away that portion 32 of the concertina fold 10 which, owing to the complete cuts 34, is in the form of a free lip, as a result of which action the film is torn along the second wall weakening 30.
  • the strip torn loose in this manner remains connected to the rest of the bag and can be used as a tie strip, so that the bag does not have to be emptied in one go. Moreover, this has the advantage that the strip torn loose is not thrown away as separate waste, but can be removed at the same time as the material of the emptied bag, in order to be recycled, which is more beneficial to the environment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
EP97201373A 1996-05-15 1997-05-07 Web of interconnected plastic bags and bag manufactured from this web Withdrawn EP0807583A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1003143A NL1003143C2 (nl) 1996-05-15 1996-05-15 Baan van met elkaar verbonden zakken van kunststof, alsmede een zak vervaardigd uit deze baan.
NL1003143 1996-05-15

Publications (1)

Publication Number Publication Date
EP0807583A1 true EP0807583A1 (en) 1997-11-19

Family

ID=19762877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97201373A Withdrawn EP0807583A1 (en) 1996-05-15 1997-05-07 Web of interconnected plastic bags and bag manufactured from this web

Country Status (2)

Country Link
EP (1) EP0807583A1 (nl)
NL (1) NL1003143C2 (nl)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010012296A1 (de) * 2010-03-23 2011-09-29 Nordfolien Gmbh Folienbeutel mit Standboden und Verfahren zu dessen Herstellung
US20160264351A1 (en) * 2004-07-27 2016-09-15 Cdf Corporation Flexible liner for fibc or bag-in-box container systems

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3254828A (en) * 1963-12-18 1966-06-07 Automated Packaging Corp Flexible container strips
LU68142A1 (nl) * 1972-08-04 1973-10-16
NL7903733A (nl) * 1979-05-11 1980-11-13 Wavin Bv Werkwijze voor het vervaardigen van een baan van kunst- stofzakken met twee blokbodems.
EP0357481A1 (fr) * 1988-08-19 1990-03-07 Compagnie Gervais-Danone Procédé et machine de fabrication de sachets ou paquets d'emballage en film mince
DE9017942U1 (de) * 1990-10-12 1991-11-14 Karl H. Sengewald GmbH & Co KG, 4802 Halle Beutelstrang und davon abgetrennter Beutel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3254828A (en) * 1963-12-18 1966-06-07 Automated Packaging Corp Flexible container strips
LU68142A1 (nl) * 1972-08-04 1973-10-16
NL7903733A (nl) * 1979-05-11 1980-11-13 Wavin Bv Werkwijze voor het vervaardigen van een baan van kunst- stofzakken met twee blokbodems.
EP0357481A1 (fr) * 1988-08-19 1990-03-07 Compagnie Gervais-Danone Procédé et machine de fabrication de sachets ou paquets d'emballage en film mince
DE9017942U1 (de) * 1990-10-12 1991-11-14 Karl H. Sengewald GmbH & Co KG, 4802 Halle Beutelstrang und davon abgetrennter Beutel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160264351A1 (en) * 2004-07-27 2016-09-15 Cdf Corporation Flexible liner for fibc or bag-in-box container systems
DE102010012296A1 (de) * 2010-03-23 2011-09-29 Nordfolien Gmbh Folienbeutel mit Standboden und Verfahren zu dessen Herstellung

Also Published As

Publication number Publication date
NL1003143C2 (nl) 1997-11-18

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Owner name: COMBIPAC B.V.

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