EP1648789B1 - Sac refermable - Google Patents

Sac refermable Download PDF

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Publication number
EP1648789B1
EP1648789B1 EP04731557A EP04731557A EP1648789B1 EP 1648789 B1 EP1648789 B1 EP 1648789B1 EP 04731557 A EP04731557 A EP 04731557A EP 04731557 A EP04731557 A EP 04731557A EP 1648789 B1 EP1648789 B1 EP 1648789B1
Authority
EP
European Patent Office
Prior art keywords
bag
packaging
strip
extensible
reclosable
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.)
Expired - Lifetime
Application number
EP04731557A
Other languages
German (de)
English (en)
Other versions
EP1648789A1 (fr
Inventor
Eddy Daelmans
Jan Geudens
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.)
Amcor Flexibles ApS
Original Assignee
Amcor Flexibles Europe AS
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 Amcor Flexibles Europe AS filed Critical Amcor Flexibles Europe AS
Priority to EP04731557A priority Critical patent/EP1648789B1/fr
Publication of EP1648789A1 publication Critical patent/EP1648789A1/fr
Application granted granted Critical
Publication of EP1648789B1 publication Critical patent/EP1648789B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/1616—Elements constricting the neck of the bag
    • B65D33/165—Flexible elongated elements integral with or attached to bags or sacks ; Fastening thereof to the bag before closing

Definitions

  • the present invention is related to a reclosable packaging bag, usually but not exclusively, produced in a vertical and/or horizontal form, fill and seal process (VFFS/HFFS).
  • VFFS/HFFS vertical and/or horizontal form, fill and seal process
  • Sealed plastic and coated paper bags are widely used in various application fields. In general, only part of their contents are used immediately upon the initial opening. Therefore a strong request for reclosable packaging bags, in particular for frozen goods, exists.
  • Herrington in US patent 4,913,560 discloses an adhesive coated plastic tape welded on the outside of a plastic bag and protected by a brittle coating material.
  • the tape is manually stretched causing the brittle coating to crack and separate, exposing the adhesive.
  • the tape is then wrapped around the neck of the bag to close it.
  • Burke in the document WO 00/73162 A1 discloses a reclosable bag comprising towards its closed ends a fixed elastic strip with an extensibility sufficient to enable it to be stretched and to make a turn around the longest dimension of the bag when filled.
  • the elastic strip is a rubber material with reversible elastomeric behaviour and low plasticity fixed outside the bag. The elastic strip can only be turned once around the reclosable bag.
  • Document GB-A-2 347 137 which accords with the preamble of claim 1 of the invention, discloses a bag with elongate flexible closure member wherein the torn-off piece is not fixed to the closure ribbon. To enable the end to be drawn out, the ribbon is torn out at a perforated line. In this case, the ribbon itself has a tear initiation, possibly detrimental to a VFFS/HFFS process.
  • Fig.1 and Fig.2 show respectively the front side and the backside of a VFFS bag with an extensible strip fixed at his ends at the inside of the bag in the cross seal area.
  • Fig.3 shows four-side seal VFFS bag with an extensible strip sealed at his ends at the inside of the bag in the cross seal area.
  • Fig.4 shows the front side of a bag with an extensible strip sealed at his ends at the inside of the bag in the cross seal area, said strip being longer than the cut-off of the bag.
  • Fig.5 shows same as Fig.1 with a laser perforation as opening initiation and/or as tear guide.
  • Fig.6 shows the opened bag with torn off piece of the bag with attached strip.
  • Fig.7 shows the stretching (elongation) of the extensible strip needing therefore good elongation and plasticity characteristics.
  • Fig.8 shows the stretched strip rolled around the opened bag.
  • Fig.9 shows the elongated strip rolled around the opened bag and torn off piece of the bag under the strings of the rolled around strip.
  • Fig.10 shows the elongated strip rolled around "the neck” of opened bag and torn off piece of the bag under the strings of the rolled strip.
  • Fig.11 is a schematic representation of a VFFS packaging machine with the extensible strip fed between form shoulder/filling pipe and bag packaging material.
  • Fig.12 shows a particular embodiment of the present invention wherein the opening initiation, including the extensible strip in the upper cross seal of the bag, is not identical with the opening initiation of the bag destined to remove the content of the bag.
  • Fig.13 shows where the opening initiation, including the extensible strip in the upper cross seal of the bag, is removed with the whole upper part of the bag while said strip and upper part remains connected to the original bag.
  • the aim of the present invention is to disclose a reclosable pack obtainable for example by a vertical and/or horizontal form, fill and seal process without major accommodations of the pack machinery and without a major cost increase of the final pack.
  • Another aim of the present invention is to disclose a packaging wherein the tearable part of the bag remains connected to the original bag after opening it to avoid waste management problems.
  • the present invention discloses a reclosable packaging bag comprising inside its cross or longitudinal sealed ends and either inside or outside the bag an extensible strip, said strip having a substantially irreversible extensibility to at least twice its original length, sufficient to enable said strip to reclose said packaging by turning it at least once around said bag, characterised in that said packaging comprises an opening initiation allowing to tear a part of the packaging and that the torn off part of said packaging is still attached to said extensible strip after opening said bag.
  • the strip is heat sealed and/or glued in the cross seals or in the longitudinal seals.
  • the extensible strip is heat sealed and/or glued in the cross seals at both ends of said strip.
  • a key aspect of the present invention is that the opening initiation to tear a part of the packaging is a part of said extensible strip.
  • a particular embodiment of this invention is that the packaging further comprises in the upper cross seal of the bag an additional opening initiation of the bag destined to open the bag in order to remove the content of the bag.
  • the packaging is a plastic and/or paper bag or a combination of it.
  • the reclosable packaging of the present invention can be produced on common horizontal and/or vertical form, fill and seal processing machines by adding to the normal packaging material an extensible strip 4 of high plasticity running at the inside of the packaging material 1.
  • the principle of such machinery is shown in Fig.11 , although such method does not form a part of the present invention.
  • Non limitative examples of packaging materials are films of polyolefins, polyesters, polyamides, PVC, polystyrene, their copolymers and blendings in mono or multilayer combinations with paper, metallized coatings, etc.
  • the extensible strip 4 of high plasticity is proceeded in polymers well known by those skilled in the art and related to the properties of high elongation at break values and high plasticity.
  • the elongation percentage must be as high as possible and at least higher than 200%, and preferably higher than 400% and most preferably up to 1000%.
  • Non limitative examples of such polymers are polyolefins and in particular homogeneously branched polyolefins obtained by metallocene catalysis exhibiting very good elongation at break values (LDPE, LLDPE, VLDPE), polyethylene and/or polypropylene copolymers and their modified versions, in particular EVA, EMA and EBA, polyurethanes, polyethers, modified polystyrene, PVC and his copolymers, etc.
  • LDPE low density polyethylene
  • LLDPE low density polyethylene
  • VLDPE polyethylene and/or polypropylene copolymers
  • EVA EVA
  • EMA polypropylene copolymers
  • polyurethanes polyethers
  • modified polystyrene polystyrene
  • PVC polystyrene
  • his copolymers etc.
  • an adequate choice balancing good irreversible elongation properties, thickness, eventually food related constraints, and price, must be targeted.
  • the extensible strip 4 is generally sealed or glued together at his both ends with the rest of the packaging material in the cross directional seal area 5 of the VFFS/HFFS bag.
  • the possible seals for this kind of packaging are well known by those skilled in the art.
  • Non limitative examples are cold and heat seal coatings such as hot melts, PVDC coatings, acrylic coatings (MB666 of Mobil Plastics), latex-based cold sealing coatings, etc.
  • an opening initiation (3, 9) such as for example a pre-cut or a laser perforation for tear guidance is made in the top of the packaging next to the position of the extensible strip 4. In that way, by opening (tearing) the package, the torn off piece 11 of this pack remains connected to the extensible strip 4 while the other end of said strip 4 is fixed on the bottom inside the pack (bottom seal) in the cross seal area 5.
  • the extensible strip 4 is pulled out of the pack by means of holding and pulling of the torn off piece of the pack and elongated by at least a factor 2, preferably 4 and most preferably 10.
  • the target of this operation is to achieve an elongated strip 4, which is long enough to roll it over the opened packaging bag 1.
  • the over-rolled strip 4 can be fixed by putting the torn off piece of the bag 11 attached to said strip 4 under the strings created by rolling the strip over the packaging bag 1. In this way, the pack can be closed as described above and re-opened by untying the string.

Landscapes

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

Claims (6)

  1. Sachet d'emballage refermable (1) comprenant, à l'intérieur de ses extrémités soudées transversales ou longitudinales et à l'intérieur ou à l'extérieur du sachet, une bande extensible (4), ladite bande (4) ayant une extensibilité essentiellement irréversible jusqu'à au moins deux fois sa longueur initiale, suffisante pour permettre à ladite bande (4) de refermer ledit emballage en la tournant au moins une fois autour dudit sachet (1), ledit emballage (1) comprenant une amorce d'ouverture (3,9) permettant de déchirer une partie de l'emballage, caractérisé en ce que la partie arrachée (11) dudit emballage (1) reste attachée à ladite bande extensible (4) après l'ouverture dudit sachet (1).
  2. Sachet d'emballage refermable (1) selon la revendication 1, caractérisé en ce que ladite bande extensible (4) est collée et/ou scellée à chaud dans les soudures transversales ou dans les soudures longitudinales.
  3. Sachet d'emballage refermable (1) selon la revendication 1, caractérisé en ce que ladite bande extensible (4) est collée et/ou scellée à chaud dans les soudures transversales aux deux extrémités de ladite bande (4).
  4. Sachet d'emballage refermable selon la revendication 1, caractérisé en ce que ladite amorce d'ouverture (3,9) permettant de déchirer une partie de l'emballage (1) fait partie de ladite bande extensible (4).
  5. Sachet d'emballage refermable selon la revendication 1, caractérisé en ce que ledit emballage comprend également dans la soudure transversale supérieure du sachet (1) une amorce d'ouverture du sachet supplémentaire destinée à ouvrir le sachet de manière à retirer le contenu du sachet.
  6. Sachet d'emballage refermable selon la revendication 1, caractérisé en ce que ledit emballage est un sachet en plastique et/ou en papier, ou une combinaison de l'un et l'autre.
EP04731557A 2003-07-25 2004-05-07 Sac refermable Expired - Lifetime EP1648789B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04731557A EP1648789B1 (fr) 2003-07-25 2004-05-07 Sac refermable

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP03447198A EP1500601A1 (fr) 2003-07-25 2003-07-25 Sac refermable et son procédé de fabrication
EP04731557A EP1648789B1 (fr) 2003-07-25 2004-05-07 Sac refermable
PCT/BE2004/000067 WO2005009851A1 (fr) 2003-07-25 2004-05-07 Sachet d'emballage refermable et procede de production correspondant

Publications (2)

Publication Number Publication Date
EP1648789A1 EP1648789A1 (fr) 2006-04-26
EP1648789B1 true EP1648789B1 (fr) 2009-04-15

Family

ID=33484106

Family Applications (2)

Application Number Title Priority Date Filing Date
EP03447198A Withdrawn EP1500601A1 (fr) 2003-07-25 2003-07-25 Sac refermable et son procédé de fabrication
EP04731557A Expired - Lifetime EP1648789B1 (fr) 2003-07-25 2004-05-07 Sac refermable

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP03447198A Withdrawn EP1500601A1 (fr) 2003-07-25 2003-07-25 Sac refermable et son procédé de fabrication

Country Status (6)

Country Link
EP (2) EP1500601A1 (fr)
AT (1) ATE428646T1 (fr)
DE (1) DE602004020626D1 (fr)
ES (1) ES2323424T3 (fr)
RU (1) RU2006103236A (fr)
WO (1) WO2005009851A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007328872A (ja) * 2006-06-08 2007-12-20 Hitachi Ltd 情報記録媒体収納システム及び収納ケース
US7681732B2 (en) 2008-01-11 2010-03-23 Cryovac, Inc. Laminated lidstock
DE102011075466A1 (de) 2011-05-06 2012-11-08 Constantia Hueck Folien Gmbh & Co. Kg Verpackungs-Verbundfolie und Verpackung
FR3021034B1 (fr) * 2014-05-15 2017-05-12 S2F Flexico Machine de formage-remplissage-scellage pour sachet a ruban

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2742382C2 (de) * 1977-09-21 1983-12-01 Melitta-Werke Bentz & Sohn, 4950 Minden Einseitig offener Kunststoffolien-Beutel, insbesondere für Abfälle
US4913560A (en) 1989-03-08 1990-04-03 Mobil Oil Corporation Stretchy sticky tape bag tie closure
GB2347137B (en) * 1999-02-25 2002-10-23 Christopher Freeman Worrell A bag with an elongate closure member
GB9912309D0 (en) 1999-05-26 1999-07-28 Innovative Elastics Limited Rubbish bag

Also Published As

Publication number Publication date
ES2323424T3 (es) 2009-07-15
RU2006103236A (ru) 2006-06-10
WO2005009851A1 (fr) 2005-02-03
EP1648789A1 (fr) 2006-04-26
ATE428646T1 (de) 2009-05-15
EP1500601A1 (fr) 2005-01-26
DE602004020626D1 (de) 2009-05-28

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