Patent US3487784A successfully refreshed from Google Patents.
Patent US4152986A successfully refreshed from Google Patents.
US3962012A
Expired / Lapsed
US
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Process for laminating pressure-sensitive material
Assignee: EIDP Inc
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Filing: 1974-06-28
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Granted: 1976-06-08
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Expires: 1994-06-28
Abstract
Abstract Improved process for laminating two sheets, the surface of the primary sheet being sensitive to distortion by pressure or friction, by applying an adhesive to the back side of the primary sheet or to the mating side of the secondary sheet, or to both, contacting the mating side of the secondary sheet with the back side of the primary sheet and firmly pressing together the two sheets while avoiding the application of any pressure to the pressure-sensitive face side of the primary sheet until at least 50 percent of the terminal bond strength is developed, by maintaining the primary and secondary sheets taut and applying pressure from the back side of the secondary sheet. Laminates prepared according to the above process, such as tufted carpets comprising a primary backing material stitched with closely spaced tufts of yarn and a secondary backing material adhered thereto with an adhesive, have improved pile lay characteristics.
Inventors
- 👤 Frederick George Schumacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:15
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B38/00; B32B38/18; B32B38/1866; B32B5/02; B32B5/024; B32B7/00; B32B7/04; B32B7/12; D; D06; D06M; D06M17/00; B32B2250/00; B32B2250/02; B32B2305/00; B32B2305/10; B32B2305/18; B32B2471/00; B32B2471/02; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1722; Y10T156/1727; Y10T156/1729; Y10T156/1732
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
145 words
In the process for laminating a primary and a secondary sheet, the face side of said primary sheet being subject to distortion by pressure or friction, said process comprising applying an adhesive to at least one of the surfaces selected from the group consisting of the back side of said primary sheet and the mating side of said secondary sheet, contacting the mating side of said secondary sheet with the back side of said primary sheet, pressing the primary and secondary sheets firmly together and setting the adhesive, the improvement comprising pressing the primary and secondary sheets firmly together, solely by applying pressure from the back side of said secondary sheet to the primary and secondary sheets under tension by pressure means to prevent distortion of the face side of said primary sheet until at least 50 percent of the terminal bond strength is developed.
Claim 2
Dependent Claim
145 words
In the process for laminating a primary and a secondary sheet, the face side of said primary sheet being subject to distortion by pressure or friction, said process comprising applying an adhesive to at least one of the surfaces selected from the group consisting of the back side of said primary sheet and the mating side of said secondary sheet, contacting the mating side of said secondary sheet with the back side of said primary sheet, pressing the primary and secondary sheets firmly together and setting the adhesive, the improvement comprising pressing the primary and secondary sheets firmly together, solely by applying pressure from the back side of said secondary sheet to the primary and secondary sheets under tension by pressure means to prevent distortion of the face side of said primary sheet until at least 50 percent of the terminal bond strength is developed.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein said primary sheet is a pile fabric.
Claim 4
Dependent Claim
23 words
The process of claim 1 wherein said primary sheet is a tufted structure of a primary backing material stitched with tufts of yarn.
Claim 5
Dependent Claim
16 words
The process of claim 3 wherein said tufts of yarn are at least 0.5 inch long.
Claim 6
Dependent Claim
13 words
The process of claim 3 wherein said pressure means has a curved surface.
Claim 7
Dependent Claim
12 words
The process of claim 5 wherein said pressure means is a roll.
Claim 8
Dependent Claim
12 words
The process of claim 5 wherein said pressure means is a platen.
Claim 9
Dependent Claim
13 words
The process of claim 1 wherein said pressure means has a flat surface.
Claim 10
Dependent Claim
14 words
The process of claim 3 wherein said pressure means has holes in its surface.
Claim 11
Dependent Claim
17 words
The process of claim 3 wherein said pressure means has raised pressure points on its upper surface.
Claim 12
Dependent Claim
15 words
The process of claim 10 wherein said pressure means is a continuously curved supporting surface.
Claim 13
Dependent Claim
13 words
The process of claim 10 wherein there are holes in said pressure points.
Claim 14
Dependent Claim
14 words
The process of claim 3 wherein said adhesive is a hot melt adhesive composition.
Claim 15
Dependent Claim
11 words
The process of claim 3 wherein said adhesive is a latex.
Claim 16
Dependent Claim
13 words
The process of claim 3 wherein said adhesive is an organic solvent-based adhesive.
Claim 17
Dependent Claim
11 words
The process of claim 11 wherein said supporting surface is cooled.
Claim 18
Dependent Claim
11 words
The process of claim 11 wherein said supporting surface is heated.
References Cited (Backward Citations)
US3150024A
Cited
US3756896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |