EP1103487A1 - Verpackungsbeutel mit verschliessbarer Öffnung - Google Patents

Verpackungsbeutel mit verschliessbarer Öffnung Download PDF

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Publication number
EP1103487A1
EP1103487A1 EP00403268A EP00403268A EP1103487A1 EP 1103487 A1 EP1103487 A1 EP 1103487A1 EP 00403268 A EP00403268 A EP 00403268A EP 00403268 A EP00403268 A EP 00403268A EP 1103487 A1 EP1103487 A1 EP 1103487A1
Authority
EP
European Patent Office
Prior art keywords
layer
packaging bag
weld strip
weld
sheet
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
EP00403268A
Other languages
English (en)
French (fr)
Other versions
EP1103487B1 (de
EP1103487B8 (de
Inventor
Jacques Hauchecorne
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 France SAS
Original Assignee
Danisco Flexible France
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 Danisco Flexible France filed Critical Danisco Flexible France
Publication of EP1103487A1 publication Critical patent/EP1103487A1/de
Publication of EP1103487B1 publication Critical patent/EP1103487B1/de
Application granted granted Critical
Publication of EP1103487B8 publication Critical patent/EP1103487B8/de
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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5855—Peelable seals
    • 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
    • B65D33/18—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps
    • B65D33/20—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps using pressure-sensitive adhesive

Definitions

  • the present invention relates to a packaging bag of the type comprising at least one packaging sheet comprising a primer associated with a welding layer between which is interposed, at the minus a marked area, a layer of permanent adhesive, which sheet at least partially delimits a housing provided with a passage initially closed by a weld strip established between said sheet and an additional support along said weldable layer.
  • Packages and sachets with a packaging sheet allowing easy opening and reclosing are currently used, for example, for packaging food products.
  • the structure such sheets are described in particular in patent application FR-A-95-14117.
  • the laminated sheet used to allow the opening and the reclosure of the packaging has two layers of polymer between which a layer of permanent adhesive is interposed.
  • One of layers called “weldable or weldable layer” is intended to be oriented towards the inside of the package. It is suitable to be welded on the edge peripheral of a tray.
  • the other layer called the “support layer”, is intended to form the external face of the packaging, this layer possibly being printed.
  • a sheet of this type can also be used to form sachets as described in document EP-A-0.516.276.
  • the sealing layer of the sheet tears on either side of the welded region. After opening the bag, it remains on the inner face of the facing sheet, a residual welded bead, consisting of the welded part of the welding layer.
  • the opening of the bag being obtained by rupture of the sealing layer, it should be chosen so that it has characteristics of rupture compatible with the conditions of use of the packaging.
  • the welding layer should be able to be torn manually, without the need to exert too much tensile force important on the packaging sheet. So the welding layers used are rather of reduced thickness.
  • the weldable layer should also have good welding characteristics to ensure a reliable bond between the sheets next to the bag.
  • the welding layer must be is compatible with the permanent adhesive interposed between the two leaf layers. To meet this condition, choose a rather thick layer.
  • the object of the invention is to provide a resealable packaging sachet, whose opening is easy and requires only the application of a reduced force to ensure opening.
  • the subject of the invention is a packaging bag of the aforementioned type, characterized in that said weld strip has according to its length, on its outer edge, a profile comprising at least one point inflection forming a stress accumulation point during opening of the sachet by spacing the packaging sheet and the additional support.
  • the bag 10 shown in Figure 1 is made from a single sheet 11 folded back on itself. The two longitudinal edges of the sheet are welded to each other in a median longitudinal weld 12.
  • the bag At its lower end, the bag has transversely a straight weld strip 14. Similarly, it has at its upper end a weld strip 16 closing off an access 18 to a delimited housing 20 inside the bag.
  • the bag has two sections extending between which a closed space is defined.
  • the sheet 11 of the bag extends at its upper end beyond of the weld strip 16 over a range of 1 to 3 cm in width, forming gripping areas facilitating the opening of the bag.
  • the sheet constituting the bag 10 has a layered structure. It has a primary layer 30 turned outwards and a weldable layer 32 facing inward of the bag. Between the primary layer 30 and the welding layer 32 is disposed a layer 34 of a permanent adhesive.
  • the longitudinal weld 12, produced between the two opposite faces of the welding layer 32, is a weld of the flesh against flesh type.
  • the two opposite end edges of the welding layer 32 are welded one against each other by heat sealing.
  • the welded strips 14 and 16 are obtained by heat sealing. of parts opposite the welding layer 32.
  • the weld strip 16 sealing the bag 20 has on its external profile at least one inflection point, forming a point of accumulation of stresses in the welding layer 32 during opening from the sachet.
  • the edge outside of the weld strip 16 has a succession of points 36 extending transversely. These are regularly spaced on the entire length of the weld strip. They each present their vertex a cusp 38 directed towards the upper end of the bag.
  • the width of the weld strip is between 5 mm and 10 mm.
  • the height of the points 36 is between 20 and 50% of the width average welded strip 16.
  • the operator enters in each hand an extension of the sheet 11 located beyond the weld strip 16. He then spreads the opposite sides of the bag in order to cause the opening from the sachet.
  • high stresses are applied in the region of the cusps 38 located at the top of the points 36.
  • the tensile force applied between the two extensions is distributes exclusively over the cusps 38 and not over the entire length of the outer contour of the welded region 16.
  • constraints very high are applied to 38 cusps in the region welded. Under the action of these constraints, the welding layer 32 tears initially around the cusps 38.
  • the presence of the turning points 38 along the contour outside of the welded strip 16 facilitates the tearing of the welding layer 32, allowing an accumulation of constraints in just certain points along the length of the outer contour of the welded strip.
  • the tear then propagates along the outer contour of the weld 16 under the continuous action of the traction of the two extensions in opposite directions.
  • the tear progresses from each turning point 38 to the bottom of the slots delimited between two points, leading thus to the complete tearing of the welding layer 32 according to the outer contour of the weld strip 16.
  • the welding layer 32 tears according to the inner contour of the welded region 32 when the two extensions are pulled in opposite directions.
  • the two sides of the bag are then separated, one always having on the inside a welded strip 46 from weld layer 32 and the other side having a groove 48 corresponding to the imprint of the strip carried by the other panel.
  • FIG. 5 is shown an alternative embodiment of the bag packaging according to the invention, noted 48.
  • the welded strip denoted 50 closing the access 18 inside the bag extends following a sinuous path, having substantially a sinusoidal shape.
  • This welded strip has, as shown on a larger scale in Figure 6, along the width of the bag a succession of curved regions 52 of opposing concavities two by two.
  • the curved regions 52 are connected by substantially rectilinear sections 54.
  • the welded strip 50 has a succession of vertices forming inflection regions of high curvatures.
  • the welded strip 50 has a width comprised between 10 mm and 15 mm and is advantageously equal to 13 mm.
  • the radii of curvature at points of inflection formed by curved regions 52 are substantially between 1 mm and 3 mm and for example equal to 2 mm.
  • FIG. 6 an envelope of the weld formed of a succession of segments defining between them angles of 60 ° has been represented in mixed lines.
  • the sachet noted 68 is closed by a weld strip 70, which has two sections straight 72, 74 successive connected to each other and angularly offset an obtuse angle.
  • the weld strip 70 has a rectilinear section 72 extending perpendicular to the axis of the bag. In the vicinity of a lateral edge of the bag, the weld strip 70 has an inclined weld section 74 of the same width as the section 72. Between the two sections, is formed on the outer contour of the weld a sharp angle 76 forming an inflection point 78 on the outer contour of the welding. A corresponding inflection point 80 is also delimited on the inside contour of the weld.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Packages (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
EP00403268A 1999-11-23 2000-11-22 Verpackungsbeutel mit verschliessbarer Öffnung Expired - Lifetime EP1103487B8 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9914736 1999-11-23
FR9914736A FR2801284B1 (fr) 1999-11-23 1999-11-23 Sachet d'emballage a ouverture refermable

Publications (3)

Publication Number Publication Date
EP1103487A1 true EP1103487A1 (de) 2001-05-30
EP1103487B1 EP1103487B1 (de) 2006-01-25
EP1103487B8 EP1103487B8 (de) 2006-05-03

Family

ID=9552446

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00403268A Expired - Lifetime EP1103487B8 (de) 1999-11-23 2000-11-22 Verpackungsbeutel mit verschliessbarer Öffnung

Country Status (5)

Country Link
EP (1) EP1103487B8 (de)
AT (1) ATE316501T1 (de)
DE (1) DE60025690T2 (de)
ES (1) ES2253194T3 (de)
FR (1) FR2801284B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004035419A1 (en) * 2002-10-17 2004-04-29 Baxter International Inc. Peelable seal for a multichambered container
ITFI20090193A1 (it) * 2009-09-03 2011-03-04 I P S S R L Internat Project Services "sacco di sicurezza per trasporto valori"
WO2014150125A3 (en) * 2013-03-15 2014-12-04 Intercontinental Great Brands Llc Reclosable packages

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050194060A1 (en) 2004-03-03 2005-09-08 Vincent Houwaert Peelable seal closure assembly
US9004761B2 (en) 2006-05-01 2015-04-14 Baxter International Inc. Multiple chamber container with mistake proof administration system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB941583A (en) * 1960-08-31 1963-11-13 Johnson & Johnson Package and method of making same
EP0343629A1 (de) * 1988-05-27 1989-11-29 Hag Gf Aktiengesellschaft Verpackung mit leicht lösbarer Siegelnaht
EP0513550A2 (de) * 1991-04-19 1992-11-19 T.W. Kutter, Inc. Wiederverschliessbare Verpackungen sowie Verfahren und Vorrichtung zu ihrer Herstellung
FR2741605A1 (fr) * 1995-11-29 1997-05-30 Soplaril Sa Structure d'obturation pour un contenant, contenant muni de cette structure et procede d'obturation du contenant
GB2337243A (en) * 1998-05-15 1999-11-17 Dairy Crest Limited Package with peelable seal and optional in register pattern

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB941583A (en) * 1960-08-31 1963-11-13 Johnson & Johnson Package and method of making same
EP0343629A1 (de) * 1988-05-27 1989-11-29 Hag Gf Aktiengesellschaft Verpackung mit leicht lösbarer Siegelnaht
EP0513550A2 (de) * 1991-04-19 1992-11-19 T.W. Kutter, Inc. Wiederverschliessbare Verpackungen sowie Verfahren und Vorrichtung zu ihrer Herstellung
FR2741605A1 (fr) * 1995-11-29 1997-05-30 Soplaril Sa Structure d'obturation pour un contenant, contenant muni de cette structure et procede d'obturation du contenant
GB2337243A (en) * 1998-05-15 1999-11-17 Dairy Crest Limited Package with peelable seal and optional in register pattern

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004035419A1 (en) * 2002-10-17 2004-04-29 Baxter International Inc. Peelable seal for a multichambered container
AU2003284064B2 (en) * 2002-10-17 2009-06-04 Baxter Healthcare S.A. Peelable seal for a multichambered container
CN100506661C (zh) * 2002-10-17 2009-07-01 巴克斯特国际公司 多室容器的可剥离密封件
ITFI20090193A1 (it) * 2009-09-03 2011-03-04 I P S S R L Internat Project Services "sacco di sicurezza per trasporto valori"
WO2014150125A3 (en) * 2013-03-15 2014-12-04 Intercontinental Great Brands Llc Reclosable packages

Also Published As

Publication number Publication date
EP1103487B1 (de) 2006-01-25
ATE316501T1 (de) 2006-02-15
DE60025690D1 (de) 2006-04-13
EP1103487B8 (de) 2006-05-03
DE60025690T2 (de) 2006-08-31
ES2253194T3 (es) 2006-06-01
FR2801284B1 (fr) 2002-02-15
FR2801284A1 (fr) 2001-05-25

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