US5030302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making a compound foil
Assignee: Teich AG
•
Filing: 1989-09-27
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Granted: 1991-07-09
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Expires: 2009-09-27
Abstract
Abstract Method for the production of a compound foil as an endless strip, the compound foil to be processed in the form of rectangular blanks covering a width of the endless strip characterized in that two different foil strips, of which a first strip contains an aluminum foil (4) or a paper are drawn through a lamination machine with tractive forces to overcome friction losses in the machine, these tractive forces producing different elongations in said two different foil strips, that one of the endless strips is provided at one side surface with a binding agent over a connecting surface, which consists of several partial areas (3, 13) separated from each other, that the two strips are connected to each other while the both strips being elastically stretched to different elongations as the strips are drawn through the lamination machine whereby after the two foil strips coming back again to their non-stretched starting state, that surfaces of the blanks each have one central area and two margin areas (9, 12) bordering on two blanks surface margins extending both in the endless strip extension, with, in each instance, in those margin areas (9, 12 ) a first proportion defined by the connecting surface area divided by the margin area surface being significantly greater than a second proportion defined by the connecting surface at the central area divided by the central area surface and that in the margin areas (9, 12) of the blank surface the said first proportion is at most 75%.
Inventors
- 👤 Wilfried Jud
- 👤 Wilhelm Mannertorp
- 👤 Franz Reiterer
- 👤 Alfred Gnadenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:10
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/04; B32B7/12; B32B7/14; B32B15/00; B32B15/04; B32B15/08; B32B27/00; B32B27/06; B32B27/10; B32B2307/00; B32B2307/70; B32B2307/732; B32B2519/00; B32B2553/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24777; Y10T428/24793; Y10T428/24802; Y10T428/24826
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
276 words
Method for the production of a compound foil as an endless strip, the compound foil to be processed in the form of rectangular blanks covering a width of the endless strip characterized in that two different foil strips, of which a first strip contains an aluminum foil (4) or a paper and which itself optionally is structured of several different layers are drawn through a lamination machine with tractive forces to overcome friction losses in the machine, these tractive forces producing different elongations in said two different foil strips, that one of the endless strips is provided at one side surface with a binding agent over a connecting surface, which consists of several partial areas (3, 13) separated from each other, that the two strips are connected to each other while the both strips being elastically stretched to different elongations as the strips are drawn through the lamination machine whereby after the two foil strips coming back again to their non-stretched starting state, that foil strip having been stretched to the lower elongation forming bubbles in the produced compound foil, that surfaces of the blanks each have one central area and two margin area (9, 12) bordering on two blanks surface margins extending both in the endless strip extension, with, in each instance, in those margin areas (9, 12) a first proportion defined by the connecting surface area divided by the margin area surface being significantly greater than a second proportion defined by the connecting surface at the central area divided by the central area surface and that in the margin areas (9, 12) of the blank surface the said first proportion is at most 75%.
Claim 2
Dependent Claim
276 words
Method for the production of a compound foil as an endless strip, the compound foil to be processed in the form of rectangular blanks covering a width of the endless strip characterized in that two different foil strips, of which a first strip contains an aluminum foil (4) or a paper and which itself optionally is structured of several different layers are drawn through a lamination machine with tractive forces to overcome friction losses in the machine, these tractive forces producing different elongations in said two different foil strips, that one of the endless strips is provided at one side surface with a binding agent over a connecting surface, which consists of several partial areas (3, 13) separated from each other, that the two strips are connected to each other while the both strips being elastically stretched to different elongations as the strips are drawn through the lamination machine whereby after the two foil strips coming back again to their non-stretched starting state, that foil strip having been stretched to the lower elongation forming bubbles in the produced compound foil, that surfaces of the blanks each have one central area and two margin area (9, 12) bordering on two blanks surface margins extending both in the endless strip extension, with, in each instance, in those margin areas (9, 12) a first proportion defined by the connecting surface area divided by the margin area surface being significantly greater than a second proportion defined by the connecting surface at the central area divided by the central area surface and that in the margin areas (9, 12) of the blank surface the said first proportion is at most 75%.
Claim 3
Dependent Claim
21 words
The method of claim 1, characterized in that the connecting surface makes up at most 5% of the endless strip surface.
Claim 4
Dependent Claim
36 words
The method of claim 1, characterized by margin areas (9, 12) of the blank surface, in which, in each instance the said first proportion amounts to at least the ten fold of the said second proportion.
Claim 5
Dependent Claim
20 words
The method of claim 1 characterized in that a second foil strip consists of biaxilly stretched polypropylene or of viscose.
Claim 6
Dependent Claim
29 words
The method of claim 1 characterized in that the partial areas (3, 13) of the connecting surface separated from each other are distributed over the entire endless strip surface.
Claim 7
Dependent Claim
21 words
The method of claim 1 characterized in that the connecting surface makes up at most 50% of the endless strip surface.
Claim 8
Dependent Claim
31 words
The method of claim 1 characterized by margin areas (9, 12) of the blank surface, in which, in each instance, the said first proportion amounts to at least the five-fold, proportion.
Claim 9
Dependent Claim
22 words
The method of claim 7 characterized in that the two foil strips are not connected with each other in their central area.
Claim 10
Dependent Claim
25 words
The method of claim 1 characterized by margin areas (9, 12) of the blank surface, an average widths of each are at least 10 mm.
Claim 11
Dependent Claim
62 words
The method of claim 1 characterized in that the central area (10, 11) of the blank surface has a width such that when the compound foil blank is used for solid piece packaging items, this central area (10, 11) is suitable for covering in the package at least the major part of the surface or one surface side of the packaged item.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-08 | 1995-01-07 | 1995-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-08 | 1999-01-07 | 1999-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-08 | 2003-01-07 | 2003-07-09 | $7700.00 | Window Closed / Lapsed |