EP0086214B1 - Package with gas-tight envelope - Google Patents

Package with gas-tight envelope Download PDF

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Publication number
EP0086214B1
EP0086214B1 EP82902632A EP82902632A EP0086214B1 EP 0086214 B1 EP0086214 B1 EP 0086214B1 EP 82902632 A EP82902632 A EP 82902632A EP 82902632 A EP82902632 A EP 82902632A EP 0086214 B1 EP0086214 B1 EP 0086214B1
Authority
EP
European Patent Office
Prior art keywords
packaging
package
cover
tear
region
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
Application number
EP82902632A
Other languages
German (de)
French (fr)
Other versions
EP0086214A1 (en
Inventor
Wilfried Jud
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.)
Folienwalzwerk Brueder Teich AG
Teich AG
Original Assignee
Folienwalzwerk Brueder Teich AG
Teich AG
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
Priority to AT365381 priority Critical
Priority to AT3653/81 priority
Application filed by Folienwalzwerk Brueder Teich AG, Teich AG filed Critical Folienwalzwerk Brueder Teich AG
Publication of EP0086214A1 publication Critical patent/EP0086214A1/en
Application granted granted Critical
Publication of EP0086214B1 publication Critical patent/EP0086214B1/en
Expired legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D75/00Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52Details
    • B65D75/58Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5827Tear-lines provided in a wall portion
    • B65D75/5833Tear-lines provided in a wall portion for tearing out a portion of the wall
    • B65D75/5838Tear-lines provided in a wall portion for tearing out a portion of the wall combined with separate fixed tearing means, e.g. tabs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D2575/00Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D2575/52Details
    • B65D2575/58Opening or contents-removing devices added or incorporated during package manufacture
    • B65D2575/586Opening or contents-removing devices added or incorporated during package manufacture with means for reclosing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D75/00Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/04Articles or materials wholly enclosed in single sheets or wrapper blanks
    • B65D75/06Articles or materials wholly enclosed in single sheets or wrapper blanks in sheets or blanks initially folded to form tubes
    • B65D75/12Articles or materials wholly enclosed in single sheets or wrapper blanks in sheets or blanks initially folded to form tubes with the ends of the tube closed by flattening and heat-sealing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D75/00Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/26Articles or materials wholly enclosed in laminated sheets or wrapper blanks

Abstract

The package made of a particularly flexible plane material, comprises a gas-tight envelope and a tearing strip delimited by scored lines or weakened areas (3, 13, 23) wherein the package material is connected to a cover element (5, 15, 25) of preferably plane material. The top surface (6, 16, 26) of the cover element (5, 15, 25), connected in a plane relationship with the package material, has a closed periphery (7, 17, 27) which surrounds completely the scored lines (3, 13, 23) without touching them. Upon pulling the cover element (5, 15, 25) forming the beginning of the tearing strip, the package material is torn from both ends of the scored lines or weakened areas (3, 13, 23) and along the lines delimiting a tearing area (4, 14, 24). Additional weakened lines (2, 12) may be provided at the locations where the package material is intended to be torn. Package materials with two layers without weakened areas (2, 12) but with a reproducible tearing, are preferably comprised with an inner support layer and with a gas-tight outer layer having most often a reduced thickness.

Description

  • The invention relates to a package having an opening aid with a gas-tight packaging envelope made of a flat, in particular flexible packaging material, in which a strip-like or tab-shaped tear-open area is provided, the packaging material having punched-through and / or weakening line pieces along at least part of the edges of this tear-open area, and wherein When the package is opened, the packaging material tears open along at least part of the edge of the tear-open area, and with a cover element made of flat material, which is detachably connected to the packaging material at the tear-open area over part of its area.
  • A pack of this type, which is known from EP-A-30348, is preferably used to hold tissues or gauze pieces soaked in a preferably refreshing or disinfectant liquid. The tear-open area provided in the packaging material is here an elongated area which is completely enclosed by a perforation line, while the cover element, which consists of flat material, is detachably connected to the packaging material by a binder and completely covers the said elongated area. The cover element is also inseparably connected on one of its rectangular sides near one end of the tear-open area to the packing envelope by a strip-shaped heat seal. When the package is opened, the cover element is gripped at its edge opposite the heat seal and pulled off in the direction of the heat seal, the packaging material tearing along the perforation line surrounding the tear-open area and the elongated tear-off area which remains adhering to the cover element being carried away by it that an elongated opening in the packaging envelope is opened at the location of the tear-open area. The cover element together with the tear-open area adhering to it, which remains connected to the packaging sleeve like a hinge via the strip-shaped heat seal, can be folded back into its original position after removal from the packaged goods for reclosing and the releasable connection can be restored by pressing. An opening aid with resealability, which operates essentially on the same principle, is also known from US-A-3,711,011 for a bag-shaped container.
  • The invention, as characterized in the claims, solves the problem of specifying a pack of the type mentioned, in which the packaging material tears when opened at the edge of a strip or tab-shaped tear-open area, which tends to be relatively small in terms of the material required for the opening aid should be able to extend over a relatively large area of the pack, and which is particularly easy to produce.
  • According to claim 1, the package according to the invention is characterized in that the surface area of the cover element which is connected to the packaging material in a flat manner has an outer contour which surrounds only a partial area of the strip-like or tab-shaped tear-open area at the beginning thereof and which completely surrounds it in the event of a punching but not touched.
  • From US-A-3 302 856, an axially stretched polyolefin film serving as a cover for a plastic container is known, which is heat-sealed to a tear-open tab over a triangular area, one of the triangular sides of which extends perpendicular to the film stretching direction. If the tear-open tab is now seen from the center of the triangle parallel to the film stretching direction in the direction of the triangle side mentioned, this polyolefin roll first tears along two triangle sides starting from a corner of the triangle, after which - outside of this triangular sealing connection - the polyolefin film along two parallel to one another and tears along the lines delimiting a tear strip in the film stretching direction. However, the opening aid known from this US Pat. No. 3,302,856 is only to be used for a packaging material which consists of a heat-sealable film made of axially stretched plastic, in particular axially stretched thermoplastics, and is therefore limited in its possible application.
  • Some advantageous embodiments of the invention are now explained on the basis of the figures.
  • For the packs described with reference to FIGS. 1 and 2, it is assumed, for example, that there is a multilayer packaging material which is a carrier layer to be located on the outside of the pack made of coated kraft paper with a grammage of 50-70 glm 2 , a 0.009 mm thick aluminum foil laminated to it gas-tight layer and then has a sealing medium layer. Depending on the type of sealing to be carried out, the sealing medium layer advantageously consists of a heat sealing medium, such as a PE or PVDC or hotmelt coating, a thickness of 0.02 to 0.06 mm or a cold adhesive coating based on latex with an application of 2- 7 g / m 2 (solid).
  • 1 shows a perspective view of a tubular bag pack 1, the packaging material of which has two weakening lines 2, which are connected at their ends by a line-shaped punching 3 provided in the packaging material, such that these weakening lines 2 and the punching 3rd limit a tear area 4.
  • In the area of this punching, the packaging material is detachably glued to a surface covering element 5 (which is shown in FIG. 1 with an exaggerated thickness for clarity) over an area 6 of the covering element surface, the outer contour 7 of this surface area 6 being punched through 3 completely encloses, but does not touch them. The punching 3, which represents an opening in the packaging material, is closed gas-tight by the cover element 5. To achieve sufficient gas tightness, the minimum distance of the contour 7 from the punching 3 is about 5 mm. The cover element 5, the z. B. can advantageously be an adhesive label, is also not glued to an edge region 8, which lies opposite the running lines of weakness, with the packaging material.
  • When the package is torn open, the cover element 5 is gripped at its edge region 8 and first pulled off from the packaging material in the direction of arrow 9 and then guided along the tearing region 4. The cover element 5 does not detach from the opening area 10, so that the package is opened in the usual way by tearing the lines of weakness 2. As a result of the U-shaped punching 3, there is no greater resistance to the pulling off of the tearing area 4 during the tearing process and the tearing of the packaging material on its weakening lines 2 can be carried out quickly and with little effort.
  • In some cases, instead of the line-shaped punching that connects the two weakening lines 2, a piece of weakening line that is realized in particular by punching can be provided. It is important that the adhesion of the flat connection with which the cover element is connected to the start of the tear strip is large enough to the force required to tear the packaging material on the pieces of weakening line connecting the two lines of weakness 2 transfer. Since no punching is provided in these pack variants, the cover element loses its sealing function and it is sufficient if the cover element is connected to the packaging material only at the beginning of the tear-open area.
  • FIG. 2 shows a tubular bag pack 11 which, like the pack according to FIG. 1, has a tear-open area 14 which is delimited by weakening lines 12 and a punching 13 connecting these weakening lines. In this packaging variant, a flat covering element 15 is now glued in the area of the punching 13 on the inside of the packaging material. The surface area 16 of the cover element 15 which is connected flatly to the packaging material during this bonding is window-shaped, i. H. in addition to an outer contour 17, it has an inner contour 18 delimiting the window opening, within which the cover element 15 is not glued to the packaging material. The minimum distance of this inner contour 18 from the outer contour 17 is about 5 mm. Through the cover element 15, the opening formed by the punching 13 in the packaging material is now closed in a gas-tight manner in a manner similar to the packing according to FIG. 1. Since the cover element 15 in the present punching according to FIG. 2 is not glued to the packaging material in the area of the punching 13, the tear-off area beginning 20 forms an easily removable packaging material flap.
  • When the package is torn open, the tear-open area 14 is grasped at its beginning 20 and, in the direction of the arrow 19, is pulled off by tearing the lines of weakness 12 and detaching it from the cover element 15 attached to the inside of the packaging material.
  • In the case of the two packaging variants described with reference to FIGS. 1 and 2, the tear-open areas each occupy a relatively large part of the surface of the packaging front.
  • In order to cover these tear-open aids for aesthetic reasons or to protect against any mechanical damage, the prism-shaped envelope area of these packs can advantageously be provided with a subsequently attached sleeve-shaped loop made of sheet material, such as paper. The outer packaging of the pack is then attached to this loop, unaffected by the design of the tear-open aid. 1, the sleeve-shaped loop can advantageously also be designed such that it forms the cover element at the same time.
  • It has been shown that the tear-open member of the package according to the invention in many cases also functions in a reproducible manner if the tear-open area is not laterally limited by lines of weakness. In these cases, the packaging material tears from the two ends of the punching along two substantially parallel or slightly converging or slightly diverging lines. This is e.g. B. the case when the packaging material consists of certain single-layer materials such as paper, a biaxially oriented polypropylene (OPP) or an aluminum foil. When using multi-layer packaging materials, as they are preferably used to build gas-tight packs, such as tubular bag packs, there is a differentiated tear behavior.
  • In the case of packaging materials which have a carrier layer and a gas-tight layer connected therewith from a homogeneous, gas-tight but easily tearable material, which layers are formed in the form of web-shaped layers, it becomes apparent - particularly when the sheets are torn open quickly Packs - usually only a well reproducing, not too divergent or wedge-shaped tearing of the packaging material when the carrier material is facing the packaged goods.
  • Such packaging material, which is constructed in three layers, consists, for. B. - starting from the outside of the pack - from a 0.0-12 to 0.020 mm thick film made of biaxially oriented polypropylene (OPP), a 0.009 mm thick aluminum film, a kraft paper with a grammage of 40-60 g / m 2 and a cold adhesive coating Latex base (2-7 g / m 2 solid).
  • Fig. 3 shows a perspective view of a z. B. produced with such a packaging material, designed as a tubular bag pack according to the invention, in which no lines of weakness are provided.
  • The packaging material here has a U-shaped punching 33, which is closed again as a covering element 25 with an adhesive label partially coated with adhesive. The outer contour 27 of the adhesive area 26 of the cover element 25 completely surrounds the punched hole 23 without, however, touching it. The cover element 25 also has an edge region 28 with which it is not connected to the packaging material.
  • When the package is torn open, the cover element 25 is gripped and pulled off in the direction of the arrow 29. The packaging material tears along two lines running approximately parallel to one another and delimiting the tear-open area 24 on both sides. Fig. 4 shows the package during the tearing process in a partial representation in section. If, on the other hand, a packaging according to FIGS. 3 and 4 is used, a packaging material which - from the outside inwards - contains an OPP sheet, a kraft paper, an aluminum foil and finally the cold adhesive coating (in each case e.g. in the individual thicknesses in connection with 3 indicated), the tearing lines run together in a wedge shape, particularly when the package is torn open quickly, so that no opening that can be used to remove packaging material is formed.
  • A two-ply packaging material, which is suitable for packs according to the invention, which do not require weakening lines that laterally delimit the tear-open area, also consists, for. B. - from the outside to the inside - from an aluminum foil, a coated kraft paper and the cold adhesive coating, each with individual thicknesses such as z. B. are specified in the packaging material used in connection with Figures 1 and 2.
  • Other suitable two-layer packaging materials are e.g. B. - in each case from the outside inwards - from a 0.012 to 0.030 mm thick OPP film, a 0.02 to 0.04 mm thick PE film and a cold adhesive coating or from a 0.009 mm thick aluminum film, a 0.02-0 , 03 mm thick OPP film and the cold adhesive coating. In the former case the PE film and in the second case the OPP film forms the (thicker) carrier layer.
  • The gas-tight package according to the invention can primarily be used advantageously as a package for foods such as chocolates or baked goods and is optionally produced in the form of a tubular bag package. However, their commercial usability is not limited to packages for solid packaging goods.

Claims (16)

1. Package (1, 11, 21) with a gas-tight wrapping of a sheet-like, in particular flexible packaging material, in which a strip-shaped or tab-shaped tear-open region (4, 14, 24) is provided, the packaging material having along at least a part of the border of the tear-open region (4, 14, 24) perforations and/or lines of weakness portions (3, 13, 23) and, when the package is opened, the packaging material tearing along at least a part of the border of this tear-open region (4, 14, 24), and with a cover element (5, 15, 25) of sheet-like material, which is joined in a detachable way to the packaging material at the tear-off region (4, 14, 24) over a part of its surface, characterized in that the surface region (6, 16, 26) of the cover element (5, 15, 25) which is joined over an area of the packaging material has an outer contour (7, 17, 27) which only encloses a partial area of the strip-like or tab-like tear-open region (4, 14, 24) at its start and, in the case of a perforation (3, 13, 23), completely encloses the latter, but without touching it.
2. Packaging according to Claim 1, characterized in that additional lines of weakness (2, 12) are provided in the packaging material and, starting from the ends of the perforation or of the lines of weakness portion (3, 13), form the border on either side of the tear-open region (4, 14, 24), along which the packaging material tears when the package is opened.
3. Package according to Claim 1 or 2, characterized in that the detachable joining over an area between packaging material and cover element (5, 15) is produced by a layer of binder.
4. Package according to one of Claims 1 to 3, characterized in that the cover element (5) comes to rest against the outer wrap of the wrapping and in that the minimum distance of the outer contour (7) of the surface region (6) of the cover element (5) joined over an area of the packaging material from the perforation or from the lines of weakness portion (3) in the packaging material is at least 1 mm, perferably however at least 5 mm.
5. Package according to one of Claims 2 to 4, characterized in that the cover element (5) consisting of a sheet-like material has a part-region (8) which is not directly joined over an area of the packaging material and forms a tab which can be lifted up.
6. Package according to one of Claims 2 to 4, characterized in that the cover element (15) consisting of a sheet-like material comes to rest against the inside of the wrapping, and in that the surface region (16) of the cover element (15) joined over an area of the packaging material has apart from its outer contour (17) a self-contained inner contour (18), the minimum distance of which from the outer contour (17) is at least 1 mm, preferably however at least 5 mm, and which does not cross or only crosses at two places the linear perforation (13) or the border of the tear-open region (14) at the start (20) of the tear-open region (14), so that a packaging material tab which can be lifted up is produced at the start of the tear-open region.
7. Package according to one of Claims 2 to 6, with an at least approximately prismatic or cylindrical wrapping region, characterized in that the cover element (5, 15) consisting of a sheet-like material is arranged within this wrapping region, and in that this region is covered by a sleeve-shaped jacket of sheet-like material.
8. Package according to Claim 7, characterized in that the sleeve-shaped jacket at the same time forms the cover element (5,15,25) in the region of the perforation or of the lines of weakness portion (3, 13, 23).
9. Package according to one of Claims 1 to 8, characterized in that the packaging material is formed by a monofilm of plastic.
10. Package according to one of Claims 1 to 8, characterized in that the packaging material is made of paper.
11. Package according to one of claims 1 to 8, characterized in that the packaging material is made of an aluminium foil.
12. Package according to one of Claims 1 to 8, characterized in that the packaging material is made as a composite material from a least two different plys of webshaped sheet-like material, of which one mainly serves as a base layer and the other mainly serves as a gas-tight layer.
13. Package according to Claim 12, characterized in that, in the case where there are no lines of weakness provided for lateral delimitation of the tear-open region, in the package the layer serving mainly as base layer faces the product packed.
14. Package according to Claim 13, characterized in that the base layer is made from a web of paper or a film of plastic.
15. Package according to' Claim 13 or 14, characterized in that the gas-tight layer consists of an aluminium foil.
16. Package according to Claim 13 or 14, characterized in that the gas-tight layer consists of a film of plastic.
EP82902632A 1981-08-21 1982-08-23 Package with gas-tight envelope Expired EP0086214B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT365381 1981-08-21
AT3653/81 1981-08-21

Publications (2)

Publication Number Publication Date
EP0086214A1 EP0086214A1 (en) 1983-08-24
EP0086214B1 true EP0086214B1 (en) 1987-05-06

Family

ID=3553491

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82902632A Expired EP0086214B1 (en) 1981-08-21 1982-08-23 Package with gas-tight envelope

Country Status (7)

Country Link
US (1) US4811848A (en)
EP (1) EP0086214B1 (en)
AT (1) AT26953T (en)
AU (1) AU8828182A (en)
DE (1) DE3276232D1 (en)
IT (1) IT1152032B (en)
WO (1) WO1983000677A1 (en)

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WO2018007693A1 (en) 2016-07-08 2018-01-11 Mc 3 Bag, method for opening such a bag, film roll and product packaged using such a bag
FR3053666B1 (en) * 2016-07-08 2020-06-19 Mc 3 BAG, FILM REEL AND PACKAGED PRODUCT USING SUCH BAG
FR3053663B1 (en) * 2016-07-08 2020-10-23 Mc 3 SACHET, SHEET MATERIAL FOR THE REALIZATION OF SUCH A SACHET, AND PRODUCT PACKAGED USING SUCH A SACHET

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Also Published As

Publication number Publication date
DE3276232D1 (en) 1987-06-11
IT8222923D0 (en) 1982-08-20
EP0086214A1 (en) 1983-08-24
IT1152032B (en) 1986-12-24
AT26953T (en) 1987-05-15
US4811848A (en) 1989-03-14
WO1983000677A1 (en) 1983-03-03
AU8828182A (en) 1983-03-08

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