EP1103487B1 - Verpackungsbeutel mit verschliessbarer Öffnung - Google Patents

Verpackungsbeutel mit verschliessbarer Öffnung Download PDF

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Publication number
EP1103487B1
EP1103487B1 EP00403268A EP00403268A EP1103487B1 EP 1103487 B1 EP1103487 B1 EP 1103487B1 EP 00403268 A EP00403268 A EP 00403268A EP 00403268 A EP00403268 A EP 00403268A EP 1103487 B1 EP1103487 B1 EP 1103487B1
Authority
EP
European Patent Office
Prior art keywords
layer
packaging bag
weld
bag
weld strip
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
EP00403268A
Other languages
English (en)
French (fr)
Other versions
EP1103487A1 (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 primary layer associated with a solder layer between which is interposed, in at least one marked area, a layer of a 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 a complementary support along said welding layer.
  • Packagings and sachets comprising a packaging sheet for easy opening and reclosure are currently used, for example, for packaging food products.
  • the structure of such sheets is described in particular in document FR-A-2 741 605.
  • the laminated sheet used to allow the opening and reclosing of the package comprises two layers of polymer between which a permanent adhesive layer is interposed.
  • One of the layers called “welding or welding layer” is intended to be oriented towards the inside of the package. It is adapted to be welded to the peripheral edge of a tray.
  • the other layer called “support layer”, is intended to form the outer face of the package, this layer can be printed.
  • a sheet of this type can also be used to form sachets as described in EP-A-0,516,276.
  • the solder layer of the sheet tears on both sides of the welded region. After opening the bag, there remains on the inner face of the sheet opposite a residual welded bead, consisting of the welded portion of the welding layer.
  • the opening of the bag being obtained by rupture of the welding layer, it is appropriate to choose it so that it has breaking characteristics compatible with the conditions of use of the package.
  • the welding layer can be torn manually, without the need to exert excessive tensile force on the packaging sheet.
  • the welding layers used are rather of reduced thickness.
  • the welding layer has good characteristics vis-à-vis welding, to ensure a reliable connection between the sheets facing the bag.
  • the welding layer is compatible with the permanent adhesive interposed between the two layers of the sheet. To satisfy this condition, it is advisable to choose a rather thick layer.
  • EP-A-0 343 629 discloses a package with a weld having a point of inflection.
  • the invention aims to provide a resealable packaging bag, the opening is easy and requires the application of a reduced force to ensure the opening.
  • the invention relates to a packaging bag of the aforementioned type, characterized in that said weld strip has along its outer edge, a profile having at least one point of inflection forming a point constraint accumulation, under the action of which the welding layer (32) tears along the contour of the welded region when opening the bag by spacing the packaging sheet and the complementary support.
  • the bag 10 shown in Figure 1 is made from a single sheet 11 folded on itself. The two longitudinal edges of the sheet are welded to each other according to a median longitudinal weld 12.
  • the bag transversely presents a rectilinear band of weld 14. Similarly, it has at its upper end a weld strip 16 closing an access 18 to a housing 20 delimited inside the bag.
  • the bag has two sides extending parallel between which is defined a closed space.
  • the sheet 11 of the bag is extended at its upper end beyond the weld strip 16 over a range of 1 to 3 cm wide, forming gripping ranges facilitating the opening of the bag.
  • the sheet constituting the bag 10 has a laminated structure. It comprises a primary layer 30 turned towards the outside and a sealing layer 32 turned towards the inside 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, made between the two faces facing the welding layer 32, is a flesh-type welding against flesh.
  • the two opposite end edges of the solder layer 32 are welded to each other by heat sealing.
  • the welded strips 14 and 16 are obtained by heat sealing portions facing the solder layer 32.
  • the welding strip 16 closing the bag 20 has on its outer profile at least one point of inflection, forming a point of accumulation of stresses in the welding layer 32 at the opening of the bag.
  • the outer edge of the weld strip 16 has a succession of spikes 36 extending transversely. These are regularly spaced along the entire length of the weld strip. They each have at their apex a cusp 38 oriented towards the upper end of the bag.
  • the width of the weld strip is between 5 mm and 10 mm.
  • the height of the tips 36 is between 20 and 50% of the average width of the welded strip 16.
  • the operator grasps in each hand an extension of the sheet 11 located beyond the sealing strip 16. It then spreads the opposite sides of the bag to cause the opening of the bag .
  • high stresses are applied in the region of the cusps 38 located at the tips of the tips 36.
  • the tensile force applied between the two extensions is distributed exclusively on the cusps 38 and not on the entire length of the outer contour of the welded region 16.
  • constraints very high are applied to the cusps 38 of the welded region. Under the action of these constraints, the welding layer 32 initially tears around the cusp points 38.
  • the presence of the cusp points 38 along the outer contour of the welded strip 16 facilitates the tearing of the solder layer 32, allowing stress accumulation at only certain points of 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 pulling the two extensions in opposite directions.
  • the tear progresses from each cusp 38 to the bottom of the crenellations delimited between two points, thus leading to complete tearing of the welding layer 32 along the outer contour of the weld strip 16.
  • the welding layer 32 tears along the inner contour of the welded region 32 when the two extensions are pulled in opposite directions.
  • the two sections of the bag are then separated, one still having on the inner side a welded strip 46 coming from the welding layer 32 and the other pan having a groove 48 corresponding to the footprint of the band carried by the other pan.
  • FIG. 5 shows an alternative embodiment of the packaging bag according to the invention, noted 48.
  • the welded strip marked 50 closing the access 18 inside the bag, extends to a sinuous path, having substantially a sinusoidal shape.
  • This welded strip has, as illustrated on a larger scale in FIG. 6, along the width of the bag a succession of curved regions. 52 concavities opposed two by two.
  • the curved regions 52 are connected by substantially rectilinear sections 54.
  • the welded strip 50 has a succession of vertices forming regions of inflection of high curvatures.
  • the welded strip 50 has a width of between 10 mm and 15 mm and is advantageously equal to 13 mm.
  • the radii of curvature at the inflection points formed by the curved regions 52 are substantially between 1 mm and 3 mm and for example equal to 2 mm.
  • the rectilinear sections 54 connecting the curved regions 52 delimit between them an angle substantially equal to 60 °.
  • the bag 68 is closed off by a weld strip 70, which comprises two successive rectilinear sections 72, 74 connected to each other and angularly offset by an obtuse angle.
  • the weld strip 70 has a rectilinear section 72 extending perpendicularly 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 a inflection point 78 on the outer contour of the weld. A corresponding inflection point 80 is also delimited on the inner 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)

Claims (7)

  1. Verpackungsbeutel (10; 48; 68) der Art mit zumindest einer Verpackungsfolie mit einer Primärschicht (30), die mit einer verschweißbaren Schicht (32) verbunden ist, zwischen weichen in zumindest einem eingegrenzten Bereich eine Schicht (34) aus einem Permanentkleber angeordnet ist, wobei die Folie zumindest teilweise eine Aufnahme (20) begrenzt, die mit einem Durchgang (18) versehen ist, der zu Anfang von einem zwischen der Folie und einem komplementären Träger entlang der verschweißbaren Schicht (32) ausgebildeten Schweißstreifen (16; 50; 70) verschlossen ist, dadurch gekennzeichnet, dass der Schweißstreifen (16; 50; 70) entlang seiner Länge auf seinem Außenrand ein Profil aufweist, das zumindest einen Knickpunkt (38; 52; 78, 80) umfasst, welcher einen Sammelpunkt für die Beanspruchungen bildet, unter deren Einwirkung die Schweißschicht (32) entlang der Kontur des verschweißten Bereiches während des Öffnens des Beutels durch Auseinanderziehen der Verpackungsfolie und des komplementären Trägers aufreißt.
  2. Verpackungsbeutel gemäß Anspruch 1, dadurch gekennzeichnet, dass das Profil des Schweißstreifens (16) eine Abfolge von Narbungspunkten (38) umfasst, die am oberen Ende von Stacheln (36) angeordnet sind, welche sich praktisch quer zu dem Schweißstreifen (16) erstrecken.
  3. Verpackungsbeutel gemäß Anspruch 1, dadurch gekennzeichnet, dass der Schweißstreifen (50) einen geschlängelten Weg beschreibt.
  4. Verpackungsbeutel gemäß Anspruch 3, dadurch gekennzeichnet, dass der geschlängelte Weg eine Abfolge von gebogenen Bereichen mit entgegen gesetzten Austiefungen aufweist.
  5. Verpackungsbeutel gemäß Anspruch 4, dadurch gekennzeichnet, dass die gebogenen Bereiche einen Krümmungsradius zwischen 1 mm und 3 mm aufweisen.
  6. Verpackungsbeutel gemäß Anspruch 1, dadurch gekennzeichnet, dass der Schweißstreifen (70) zumindest ein Teilstück umfasst, das auf seinem Außenrand einen stumpfen Winkel (78) aufweist.
  7. Verpackungsbeutel gemäß Anspruch 6, dadurch gekennzeichnet, dass der Schweißstreifen im Wesentlichen zwei geradlinige Teilstücke umfasst, welche durch eine Biegung miteinander verbunden sind, die den stumpfen Winkel begrenzt.
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 EP1103487A1 (de) 2001-05-30
EP1103487B1 true 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)

Families Citing this family (5)

* 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
US7175614B2 (en) * 2002-10-17 2007-02-13 Baxter International Inc. Peelable seal
US9004761B2 (en) 2006-05-01 2015-04-14 Baxter International Inc. Multiple chamber container with mistake proof administration system
ITFI20090193A1 (it) * 2009-09-03 2011-03-04 I P S S R L Internat Project Services "sacco di sicurezza per trasporto valori"
WO2014150125A2 (en) * 2013-03-15 2014-09-25 Intercontinental Great Brands Llc Reclosable packages

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3070225A (en) * 1960-08-31 1962-12-25 Johnson & Johnson Package and method of making same
DE3818111A1 (de) * 1988-05-27 1989-11-30 Hag Gf Ag Verpackung
US5118203A (en) * 1991-04-19 1992-06-02 T W Kutter, Inc. Resealable packages and method and apparatus for producing same
FR2741605B1 (fr) * 1995-11-29 1998-01-16 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

Also Published As

Publication number Publication date
ES2253194T3 (es) 2006-06-01
DE60025690D1 (de) 2006-04-13
DE60025690T2 (de) 2006-08-31
ATE316501T1 (de) 2006-02-15
EP1103487A1 (de) 2001-05-30
FR2801284A1 (fr) 2001-05-25
FR2801284B1 (fr) 2002-02-15
EP1103487B8 (de) 2006-05-03

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