US4343847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing membrane with incorporated limited-slip sheet and its method of manufacture
Assignee: Siplast SA
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Filing: 1980-11-14
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Granted: 1982-08-10
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Expires: 2000-11-14
Abstract
Abstract A carrier is coated with a suitable adhesive. That surface of the adhesive which is to be placed in contact with the support for the membrane is united with an assembly consisting of a film, and a sheet of material which does not bond to the film. The sheet is impermeable to the hot adhesive, and both film and sheet have perforations which are in substantial alignment. The sheet is positioned on the outside of the assembly, facing toward the support. The adhesive is exposed through the aligned perforations and provides continuity of material throughout the membrane. The imperforated portions of film and sheet can slide relative to each other, thus providing a so-called "limited-slip sheet" for the membrane. Preferably, the impermeable sheet is preperforated, while the perforations in the film are created by the heat of the adhesive, as both film and sheet are applied simultaneously with the coatings of the carrier by the adhesive. Variants which further improve the emplacement of the membrane on the support are also disclosed.
Inventors
- 👤 Jean-Yves Meynard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:53
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/04; B32B7/12; E; E04; E04D; E04D5/00; E04D5/12; B32B3/00; B32B3/26; B32B3/266; B32B2581/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/1092; Y10T156/1093; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24339; Y10T428/24355; Y10T428/24372; Y10T428/28; Y10T428/2839
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
117 words
A sealing membrane intended for application to a support subject to cracking and having at least one carrier enveloped in a suitable adhesive, said sealing membrane being characterized in that upon that face which is adapted to be in contact with the support subject to cracking, there is united an assembly comprising a film and a sheet of material which is not fusible or only slightly fusible and nontraversable by the hot adhesive, said film and sheet being superposed and having aligned perforations and being such that they do not bond to each other, said sheet being positioned toward the outside of the sealing membrane, and the adhesive extending through said perforations in both film and sheet.
Claim 2
Dependent Claim
117 words
A sealing membrane intended for application to a support subject to cracking and having at least one carrier enveloped in a suitable adhesive, said sealing membrane being characterized in that upon that face which is adapted to be in contact with the support subject to cracking, there is united an assembly comprising a film and a sheet of material which is not fusible or only slightly fusible and nontraversable by the hot adhesive, said film and sheet being superposed and having aligned perforations and being such that they do not bond to each other, said sheet being positioned toward the outside of the sealing membrane, and the adhesive extending through said perforations in both film and sheet.
Claim 3
Dependent Claim
38 words
The sealing membrane of claim 1 wherein the asembly is situated in the adhesive on one side of the carrier in such position that the lower-most layer of the membrane is formed of a thin layer of adhesive.
Claim 4
Dependent Claim
45 words
The sealing membrane of claim 1 wherein the assembly is situated in the adhesive on one side of the carrier in such manner that the lower-most layer of the membrane is formed of the sheet and of the adhesive in the perforations in the sheet.
Claim 5
Dependent Claim
24 words
The sealing membrane of claim 1 wherein the film is made of a continuous material which melts at the temperature of the hot adhesive.
Claim 6
Dependent Claim
19 words
The sealing membrane of claim 4 wherein the film is made of a material which melts at 200° C.
Claim 7
Dependent Claim
24 words
The sealing membrane of claim 5 wherein the film is made of a material selected from the group consisting of polyethylene, polypropylene, and PVC.
Claim 8
Dependent Claim
20 words
The sealing membrane of claim 1 wherein the film is perforated and of the same composition as the sheet material.
Claim 9
Dependent Claim
22 words
The sealing membrane of claim 1 wherein the said sheet is made of a material which is heat resistant to 200° C.
Claim 10
Dependent Claim
22 words
The sealing membrane of claim 8 wherein the sheet is made of a material selected from paper, glass felt, and polyester films.
Claim 11
Dependent Claim
36 words
The sealing membrane of claim 1 wherein the said film and the said sheet are made of materials or impregnated with materials which are such that the film and sheet do not bond to each other.
Claim 12
Dependent Claim
16 words
The sealing membrane of claim 10 wherein the said sheet is treated with an anti-adhesive medium.
Claim 13
Dependent Claim
81 words
A sealing membrane intended for application to a support subject to cracking and comprising at least one carrier enveloped by a suitable adhesive and characterized in that one width of the said membrane is divided into two regions, one region A comprising the assembly as defined in claim 1, and the other region B comprising a surface finishing layer, such that upon application of successive widths, the region B of one width completely covers the region A of the preceding width.
Claim 14
Dependent Claim
23 words
The sealing membrane of claim 12 wherein the width of the region B is at least equal to that of the region A.
Claim 15
Dependent Claim
21 words
The sealing membrane according to claim 12 wherein the surface finishing layer is made of metal film or of ceramic granules.
Claim 16
Dependent Claim
23 words
The sealing membrane of claim 12 characterized in that it is mechanically reinforced in the area of junction of regions A and B.
Claim 17
Dependent Claim
30 words
The sealing membrane of claim 15 wherein the reinforcement is provided by the metallic film forming the finishing layer and which is extended so that it covers the region A.
Claim 18
Dependent Claim
26 words
The sealing membrane of claim 15 wherein the reinforcement is provided by a supplemental carrier positioned in the junction area between region A and region B.
Claim 19
Dependent Claim
28 words
The sealing membrane of claim 15 wherein the reinforcement consists of a supplemental carrier present in one of said regions and which is extended into the other region.
References Cited (Backward Citations)
US2270734A
Cited
US3326366A
Cited
FR1560512A
Cited
DE2506723C2
Cited
DE2519226C3
Cited
FR2364116B2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-09 | 1986-02-08 | 1986-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-09 | 1990-02-08 | 1990-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-09 | 1994-02-08 | 1994-08-10 | $7700.00 | Window Closed / Lapsed |