CA2082403A1 - Method for producing a sealed package, cut blank for the production of the package and produced package - Google Patents
Method for producing a sealed package, cut blank for the production of the package and produced packageInfo
- Publication number
- CA2082403A1 CA2082403A1 CA 2082403 CA2082403A CA2082403A1 CA 2082403 A1 CA2082403 A1 CA 2082403A1 CA 2082403 CA2082403 CA 2082403 CA 2082403 A CA2082403 A CA 2082403A CA 2082403 A1 CA2082403 A1 CA 2082403A1
- Authority
- CA
- Canada
- Prior art keywords
- package
- foil
- joining
- base layer
- joining edge
- 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.)
- Abandoned
Links
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
- B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
- B65D3/22—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines with double walls; with walls incorporating air-chambers; with walls made of laminated material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cartons (AREA)
- Making Paper Articles (AREA)
Abstract
ABSTRACT
A perforation (11) is made next to at least one joining edge (42) in a basic layer (1). A
plastic film (2) is then applied to at least one side of the base layer (1), covering the perforation (1). A cut-out is made from the package material (3) so obtained. The cut-out has at least one film tab which juts out next to at least one joining edge (42) and which previously formed the portion (21) of the film placed over the perforation. A joining edge (42) on the inside or outside of the package is then covered and sealed by this film tab. The basic layer is preferably paper or cardboard and can therefore be simply and attractively printed. If the basic layer (1) is enclosed between two plastic films (2), the two films can be united in all film tabs. The joining edges are then already completely enclosed on the cut-out. Very strong, flat and tightly sealed joins can be obtained. Webs, sheets or cut-outs of packaging material for finishing the package can be supplied during filling.
A perforation (11) is made next to at least one joining edge (42) in a basic layer (1). A
plastic film (2) is then applied to at least one side of the base layer (1), covering the perforation (1). A cut-out is made from the package material (3) so obtained. The cut-out has at least one film tab which juts out next to at least one joining edge (42) and which previously formed the portion (21) of the film placed over the perforation. A joining edge (42) on the inside or outside of the package is then covered and sealed by this film tab. The basic layer is preferably paper or cardboard and can therefore be simply and attractively printed. If the basic layer (1) is enclosed between two plastic films (2), the two films can be united in all film tabs. The joining edges are then already completely enclosed on the cut-out. Very strong, flat and tightly sealed joins can be obtained. Webs, sheets or cut-outs of packaging material for finishing the package can be supplied during filling.
Description
- 1 - 2~
Method for producing a sealed package, Cut blank for the production of the package and produced package.
The invention relates to a method for producing a sealed package in accordance with the preamble of claim 1.
It also refers to a cut blank for the production of a sealed package and a sealed package.
Packages of plastic foils alone have a low loading capability and, therefore, can hardly be stacked. They can be easily injured, whereby they get leaky. They are not suitable for packages which protect the content well.
Relatively sealed packages are the milk packages, at which the cardboard bearing layer giving the stabili~y is shielded by projecting joint areas present on the outside such that the cut edges cannot be softened. The joining areas of the edges can at best be folded back on the out-side and form then areas of at least triple material strength, which form at further connections disturbing bulges and, therefore, are difficult to seal at those areas. When it gets hooked at some place, such a joint area can tear and thus lead to the destruction of the package.
The invention is based on the object to provide a sealed package by a simple procedure, which, regarding the material, is advantageous in economic and ecologic respects and of which the joint areas can be held relatively thin.
In order to solve this object, the method for producing a sealed package as defined in claim 1 is proposed.
Furthermore, a cut blank for the production of a sealed package and a sealed package as such æe proposed.
The method in accordance with the preamble of claim 1 corresponds essentially to the production of milk packages and specifically has the drawback that either a cut edge lies freely on the inside of the package and can there get softened and leaky, or then the cut edges are present on the outside and represent a disturbing bulge which can only take part at other joint areas with difficulty.
Method for producing a sealed package, Cut blank for the production of the package and produced package.
The invention relates to a method for producing a sealed package in accordance with the preamble of claim 1.
It also refers to a cut blank for the production of a sealed package and a sealed package.
Packages of plastic foils alone have a low loading capability and, therefore, can hardly be stacked. They can be easily injured, whereby they get leaky. They are not suitable for packages which protect the content well.
Relatively sealed packages are the milk packages, at which the cardboard bearing layer giving the stabili~y is shielded by projecting joint areas present on the outside such that the cut edges cannot be softened. The joining areas of the edges can at best be folded back on the out-side and form then areas of at least triple material strength, which form at further connections disturbing bulges and, therefore, are difficult to seal at those areas. When it gets hooked at some place, such a joint area can tear and thus lead to the destruction of the package.
The invention is based on the object to provide a sealed package by a simple procedure, which, regarding the material, is advantageous in economic and ecologic respects and of which the joint areas can be held relatively thin.
In order to solve this object, the method for producing a sealed package as defined in claim 1 is proposed.
Furthermore, a cut blank for the production of a sealed package and a sealed package as such æe proposed.
The method in accordance with the preamble of claim 1 corresponds essentially to the production of milk packages and specifically has the drawback that either a cut edge lies freely on the inside of the package and can there get softened and leaky, or then the cut edges are present on the outside and represent a disturbing bulge which can only take part at other joint areas with difficulty.
- 2 - ~Ç~
With the inventive method the first measures are taken already when forming the packing material. In the base layer (eg paper, cardboard and similar, possibly multi-layered and/or coated) initially a perforation is formed 5 aLdjacent at least one joining edge. Thereafter, a plastic foil (eg polypropylene etc.) is placed on at least one side of the base layer in such a manner that the plastic foil covers also the perforation or perforations, respectively.
Then a cut blank is produced from the packing material thus 10 obtained, at which adjacent at least one joining edge a foil flap is formed. The material of this foil flap is formed by a part of the plastic foil which covered the perforation.
During the forming of the joint area the joining edge lo-cated on the inside of the package and/or on the outer side 15 of the package is sealingly covered by such a foil flap. It is, therefore, possible to produce a package which is sealed towards the inside and/or towards the outside. Depending from the foil, the criteria regarding the sealing properties can be the same or different.
Thus, a relatively thin and yet sealed joint area is obtained, at which the sealing foil flap does not influence the thickness of the joint area.
If it is preferred to use paper- or cardboard-like materials as the base layer, it is possible to apply 25 besides the reinforcing effect of the fibrous material also a printing method which is very simple, economical and which produces aesthetic prints.
In case of plastic foils present at both sides of the base layer, it is however also possible to let only 30 one of the foils take part on the foil flap belonging to a joining edge. It is then possible to cover the inner joining edge by an inner foil flap and the outer joining edge by an outer foil flap.
If the base layer is enclosed between two plastic 35 foils, it is also possible to let both plastic foils take part at all foil flaps, such that the base layer is en-closed along the joining edges already in its cut blank state.
~2~
Very solid joint areas are obtained when the joining edges are overlapped at their combining to the joint area. It is not necessary to suffer either thick joint areas or insufficient sealing properties.
It is also possible to practise the inventive method in steps which are distant each other, whereby it is not very important what is made where.
It is possible to produce the packing material as a roll or sheet, to make the cutting at the final production 10 of the package also during the filling thereof.
It is also possible to transport the produced cut blanks to the place where the package is produced, for instance when filling the package.
It is even possible to combine the entire proce-15 dure with the filling on a production line if such is de-sired.
For this reason also a packing material and a cut blank are subject of the invention. The packaging material is characterized in that it comprises a base layer and at 20 least one plastic foil connected therewith, whereby adjacent at least one joining edge the plastic foil bridges a perfora-tion in the base layer with a portion of the foil. This foil portion forms in the cut blank a freely projecting foil flap.
The base layer is preferably in part like paper 25 or cardboard.
It is, furthermore, also preferred when the base layer is enclosed between two plastic foils.
The invention will hereafter be discussed exemp-larily based on the purely schematic illustration of an 30 embodiment.
There is shown in :
Figure 1 a top view onto a part of a packaging material which comprises as base layer a vertically hatched cardboard, out of which the perforations have already been 35 punched and onto which a plastic foil is placed at the side thereof facing the viewer (at the package later inner side) and which covers also the perforations and being hatched ' ~ ?
horizontally, Figure 2 a top view similar to the one of Fig.l of a single cut blank produced by a periphery punching, Figure 3 a small entire view of a package, of 5 which the cylinder jacket has been produced from the cut blank/ and a dish-shaped bottom and cover, respectively, is inserted in both its ends, and Figure 4 an enlarged section through the joint 10 area of Fig. 3 designed in a superelevated manner.
It shall be noted that the base layer~ and a plastic foil covering same have the same reference in all figures.
The following is meant in the drawings :
1 base layer (here a cardboard).
11 perforation in 1, adjacent a future 42 in Fig. 1 and Fig. 2.
2 plastic foil on the inner side of 1 (in Fig. 1 above).
21 foil part of 2 over 11 Fig. 1.
With the inventive method the first measures are taken already when forming the packing material. In the base layer (eg paper, cardboard and similar, possibly multi-layered and/or coated) initially a perforation is formed 5 aLdjacent at least one joining edge. Thereafter, a plastic foil (eg polypropylene etc.) is placed on at least one side of the base layer in such a manner that the plastic foil covers also the perforation or perforations, respectively.
Then a cut blank is produced from the packing material thus 10 obtained, at which adjacent at least one joining edge a foil flap is formed. The material of this foil flap is formed by a part of the plastic foil which covered the perforation.
During the forming of the joint area the joining edge lo-cated on the inside of the package and/or on the outer side 15 of the package is sealingly covered by such a foil flap. It is, therefore, possible to produce a package which is sealed towards the inside and/or towards the outside. Depending from the foil, the criteria regarding the sealing properties can be the same or different.
Thus, a relatively thin and yet sealed joint area is obtained, at which the sealing foil flap does not influence the thickness of the joint area.
If it is preferred to use paper- or cardboard-like materials as the base layer, it is possible to apply 25 besides the reinforcing effect of the fibrous material also a printing method which is very simple, economical and which produces aesthetic prints.
In case of plastic foils present at both sides of the base layer, it is however also possible to let only 30 one of the foils take part on the foil flap belonging to a joining edge. It is then possible to cover the inner joining edge by an inner foil flap and the outer joining edge by an outer foil flap.
If the base layer is enclosed between two plastic 35 foils, it is also possible to let both plastic foils take part at all foil flaps, such that the base layer is en-closed along the joining edges already in its cut blank state.
~2~
Very solid joint areas are obtained when the joining edges are overlapped at their combining to the joint area. It is not necessary to suffer either thick joint areas or insufficient sealing properties.
It is also possible to practise the inventive method in steps which are distant each other, whereby it is not very important what is made where.
It is possible to produce the packing material as a roll or sheet, to make the cutting at the final production 10 of the package also during the filling thereof.
It is also possible to transport the produced cut blanks to the place where the package is produced, for instance when filling the package.
It is even possible to combine the entire proce-15 dure with the filling on a production line if such is de-sired.
For this reason also a packing material and a cut blank are subject of the invention. The packaging material is characterized in that it comprises a base layer and at 20 least one plastic foil connected therewith, whereby adjacent at least one joining edge the plastic foil bridges a perfora-tion in the base layer with a portion of the foil. This foil portion forms in the cut blank a freely projecting foil flap.
The base layer is preferably in part like paper 25 or cardboard.
It is, furthermore, also preferred when the base layer is enclosed between two plastic foils.
The invention will hereafter be discussed exemp-larily based on the purely schematic illustration of an 30 embodiment.
There is shown in :
Figure 1 a top view onto a part of a packaging material which comprises as base layer a vertically hatched cardboard, out of which the perforations have already been 35 punched and onto which a plastic foil is placed at the side thereof facing the viewer (at the package later inner side) and which covers also the perforations and being hatched ' ~ ?
horizontally, Figure 2 a top view similar to the one of Fig.l of a single cut blank produced by a periphery punching, Figure 3 a small entire view of a package, of 5 which the cylinder jacket has been produced from the cut blank/ and a dish-shaped bottom and cover, respectively, is inserted in both its ends, and Figure 4 an enlarged section through the joint 10 area of Fig. 3 designed in a superelevated manner.
It shall be noted that the base layer~ and a plastic foil covering same have the same reference in all figures.
The following is meant in the drawings :
1 base layer (here a cardboard).
11 perforation in 1, adjacent a future 42 in Fig. 1 and Fig. 2.
2 plastic foil on the inner side of 1 (in Fig. 1 above).
21 foil part of 2 over 11 Fig. 1.
3 packing material of 1 and 2.
4 cut blank for cylinder jacket from 3.
41 foil flaps of 4 adjacent 42 ~was in Fig. 1 21 over 11).
42 joining edge adjacent 41 (in Fig. 1 adjacent 11) .
43 joining edge (in Fig. 1 not adjacent perfor-ation).
44 joint area of 42 and 43.
41 foil flaps of 4 adjacent 42 ~was in Fig. 1 21 over 11).
42 joining edge adjacent 41 (in Fig. 1 adjacent 11) .
43 joining edge (in Fig. 1 not adjacent perfor-ation).
44 joint area of 42 and 43.
5 circular cover from 3.
6 package out of one 4 and two 5.
It is possible to print the base layer prior to the coating by the plastic foil advantageously, simply, at low cost and aesthetically by a paper printing procedure.
It is possible to firstly coat, laminate, etc.
a base layer part, for example an unprinted or printed paper, such that in such a case the base layer 1 itself is a multi-layered planar article.
It is possible to process the base layer 1 from a roll or as sheet, whereby the perforations 11 are punched out by a punching machine. In principle it is possible to 5 proceed in this way adjacent all joining edges 42, 43. In the illustrated example only one perforation 11 is shown adjacent each joining edge 42.
The base layer 1 provided with perforations 11 is then joined to a plastic foil 2, whereby the portions 21 10 of the foil cover also the perforations 11.
In principle it is also possible to cover the other side of the base layer with a plastic foil, which can specifically be done in such a case when also adjacent the joining edges 43 perforations (not illustrated here) have 15 been foreseen.
From the base layer 1 and the at least one plastic foil 2 a packaging material 3 is obtained, from which there-after cut blanks 4 are produced by peripheral punching. At the punching the portion 21 of the foil adjacent the joining 20 edge 42 is left there such that a foil flap 41 is produced.
Should perforations and foil portions 21 be pro-duced also adjacent the joining edges 43, it would be pos-sible (specifically in the case of a base layer coated on both sides by a plastic foil) to produce adjacent the join-25 ing edge 43 a foil flap (not illustrated).
Because here a cylinder-shaped package 6 is sought, circular covers 5 will be produced which can be simply pun-ched out of the same combination of base layer and plastic foil. It is, however, also possible to produce end covers 30 of the cylinder in accordance with other known methods.
In order to produce a cylinder jacket out of the blank 4, the blank 4 is bent together whereby the plastic foil is located on the inside. The joining edges 42 and 43 are overlapped and they are joined together for instance 35 by welding to a joint area 44, whereby the foil flap 41 adjacent the joining edge 42 is connected to the plastic foil (see Fig. 4) in such a manner that the joining edge 42 . ~
is sealingly covered.
At a not illustrated variant, at which also ad-jacent the foil edge 43 a foil flap would be produced, its covering would also have to be made in an analogous manner.
In order to complete the package 6, it is now possible to weld the two circular covers 5 according to a as such known procedure into the ends of the cylinder.
It is possible to print the base layer prior to the coating by the plastic foil advantageously, simply, at low cost and aesthetically by a paper printing procedure.
It is possible to firstly coat, laminate, etc.
a base layer part, for example an unprinted or printed paper, such that in such a case the base layer 1 itself is a multi-layered planar article.
It is possible to process the base layer 1 from a roll or as sheet, whereby the perforations 11 are punched out by a punching machine. In principle it is possible to 5 proceed in this way adjacent all joining edges 42, 43. In the illustrated example only one perforation 11 is shown adjacent each joining edge 42.
The base layer 1 provided with perforations 11 is then joined to a plastic foil 2, whereby the portions 21 10 of the foil cover also the perforations 11.
In principle it is also possible to cover the other side of the base layer with a plastic foil, which can specifically be done in such a case when also adjacent the joining edges 43 perforations (not illustrated here) have 15 been foreseen.
From the base layer 1 and the at least one plastic foil 2 a packaging material 3 is obtained, from which there-after cut blanks 4 are produced by peripheral punching. At the punching the portion 21 of the foil adjacent the joining 20 edge 42 is left there such that a foil flap 41 is produced.
Should perforations and foil portions 21 be pro-duced also adjacent the joining edges 43, it would be pos-sible (specifically in the case of a base layer coated on both sides by a plastic foil) to produce adjacent the join-25 ing edge 43 a foil flap (not illustrated).
Because here a cylinder-shaped package 6 is sought, circular covers 5 will be produced which can be simply pun-ched out of the same combination of base layer and plastic foil. It is, however, also possible to produce end covers 30 of the cylinder in accordance with other known methods.
In order to produce a cylinder jacket out of the blank 4, the blank 4 is bent together whereby the plastic foil is located on the inside. The joining edges 42 and 43 are overlapped and they are joined together for instance 35 by welding to a joint area 44, whereby the foil flap 41 adjacent the joining edge 42 is connected to the plastic foil (see Fig. 4) in such a manner that the joining edge 42 . ~
is sealingly covered.
At a not illustrated variant, at which also ad-jacent the foil edge 43 a foil flap would be produced, its covering would also have to be made in an analogous manner.
In order to complete the package 6, it is now possible to weld the two circular covers 5 according to a as such known procedure into the ends of the cylinder.
Claims (9)
1. Method of producing a sealed package (6), in which a cut blank (4) of a planar packaging material (3) which includes a base layer (1) and a sealing plastic foil (2) connected thereto is joined along two joining edges (42, 43) to a joint area (44), characterized in that firstly a perforation (11) is formed in the base layer (1) adjacent at least one joining edge (42), whereafter the plastic foil (2) is connected to the base layer (1) and thereby also the at least one perforation (11) is covered by a portion (21) of the plastic foil (2), whereafter the cut blank (4) is formed from the packaging material (6) obtained in this man-ner, at which adjacent at least one joining edge (42) a foil flap (41) is formed from the portion (21) of the plastic foil (2)-located-over the corresponding perforation (11), by which foil flap (41) the adjacent joining edge (42) is covered in a sealed manner.
2. Method according to claim 1, characterized in that a cardboard or paper-like base layer (1) is used.
3. Method according to claims 1 or 2, character-ized in that the joining edge (42) located inside is cover-ed in a sealed manner by the flap (41) of the foil located inside of the package.
4. Method according to one of the claims 1 to 3, characterized in that the base layer (1) is enclosed bet-ween two plastic foils (2).
5. Method according to claim 4, characterized in that the two plastic foils (2) are interconnected in at least one foil flap (41).
6. Method according to claim 4, characterized in that a perforation (11,-) each is formed adjacent both joining edges (42, 43) and each perforation (11,-) is cover-ed by at least one plastic foil (2) in such a manner that when producing the blank a foil flap (41,-) is formed ad-jacent the one edge area (42) at least of the one and adjacent the other joining edge (42) at least of the other plastic foil (2).
7. Method according to one of the claims 1 to 6, characterized in that the joining edges (42, 43) are over-lapped during their joining to the joint area (44).
8. Cut blank for the production of a sealed package, specifically in practising the method according to one of the claims 1 to 7, characterized in that it con-sists of a multi-layer packaging material (3) which includes a base layer (1), which includes at least on one side a plastic foil (2) connected therewith, whereby adjacent at least one joining edge (42) a foil flap (41) is formed projecting over the base layer (1).
9. Package, produced in accordance with the method of one of the claims 1 to 6, characterized in that one joint area (44) is foreseen formed of two joining edges (42, 43) which are connected to each other, whereby the joining edge (42) located inside of the package and/or the joining edge (43) located outside of the package are sealing-ly covered by a foil flap (41;-) projecting over the joining edge (43; 43).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH674/91-1 | 1991-03-06 | ||
| CH674/91A CH680724A5 (en) | 1991-03-06 | 1991-03-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2082403A1 true CA2082403A1 (en) | 1992-09-07 |
Family
ID=4192518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2082403 Abandoned CA2082403A1 (en) | 1991-03-06 | 1991-04-17 | Method for producing a sealed package, cut blank for the production of the package and produced package |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0527756A1 (en) |
| JP (1) | JPH05508598A (en) |
| AU (1) | AU7563391A (en) |
| CA (1) | CA2082403A1 (en) |
| CH (1) | CH680724A5 (en) |
| WO (1) | WO1992015489A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1403924A (en) * | 1964-05-21 | 1965-06-25 | Tetra Pak Ab | Complex packaging material and method of manufacturing a tube from said material |
| SE380196B (en) * | 1974-08-15 | 1975-11-03 | Ziristor Ab | WAY TO MANUFACTURE LAMINATE YEARS WITH FIXED EDGE BELT |
| JPS5372648U (en) * | 1976-11-18 | 1978-06-17 | ||
| JPS5829912U (en) * | 1981-08-25 | 1983-02-26 | 日本製罐株式会社 | paper can body |
-
1991
- 1991-03-06 CH CH674/91A patent/CH680724A5/de not_active IP Right Cessation
- 1991-04-17 EP EP19910906952 patent/EP0527756A1/en not_active Ceased
- 1991-04-17 WO PCT/CH1991/000091 patent/WO1992015489A1/en not_active Application Discontinuation
- 1991-04-17 CA CA 2082403 patent/CA2082403A1/en not_active Abandoned
- 1991-04-17 JP JP91506437A patent/JPH05508598A/en active Pending
- 1991-04-17 AU AU75633/91A patent/AU7563391A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AU7563391A (en) | 1992-10-06 |
| WO1992015489A1 (en) | 1992-09-17 |
| CH680724A5 (en) | 1992-10-30 |
| EP0527756A1 (en) | 1993-02-24 |
| JPH05508598A (en) | 1993-12-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |