US4394416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film-paper fiber layer laminate and process for preparation thereof
Assignee: Azona Co Ltd
•
Filing: 1981-05-26
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Granted: 1983-07-19
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Expires: 2001-05-26
Abstract
Abstract Disclosed is a film-paper fiber layer laminate comprising a film and a very thin paper fiber layer bonded to the surface of the film. This laminate is prepared by bonding films to both surfaces of a paper so that the adhesive bond strength between the film and the paper is higher than the failure strength of the paper fiber layer and separating the films by delamination. This film-paper fiber layer laminate is excellent in the transparency and dimension stability, and the tearing strength of the film per se is completely retained and the laminate is suitably used as a tracing paper.
Inventors
- 👤 Yoshikazu Shimizu
- 👤 Kathuhiro Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:37
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B32B25/00; B32B25/04; B32B25/06; B32B25/14; B32B27/28; B32B27/281; B32B27/30; B32B27/302; B32B27/304; B32B27/306; B32B27/32; B32B27/34; B32B27/36; B32B27/365; B32B37/00; B32B37/14; B32B37/16; B32B37/20; B32B37/203; B32B38/00; B32B38/10; B32B7/00; B32B7/04; B32B7/12; D; D21; D21H; D21H27/00; D21H27/30; D21H27/32; D21H27/34; D21H27/36; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; B32B2317/00; B32B2317/12; B32B2319/00; B32B2323/00; B32B2323/04; B32B2323/10; B32B2325/00; B32B2327/00; B32B2327/06; B32B2367/00; B32B2369/00; B32B2377/00; B32B2379/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1059; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/31504; Y10T428/31507; Y10T428/31721; Y10T428/31725; Y10T428/31779; Y10T428/31783; Y10T428/31786; Y10T428/3179; Y10T428/31826; Y10T428/31841; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31906; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
72 words
A film-paper fiber layer laminate comprising a film selected from the group consisting of a polyvinyl chloride film, a polyethylene film, a polypropylene film, a polystyrene film, a polyacetate film, a polycarbonate film, a polyester film, a polyamide film, a polyimide film and a chlorinated rubber film; and a thin paper fiber layer bonded to the film, the basis weight of the paper fiber layer being 5 to 15 g/m 2 .
Claim 2
Dependent Claim
72 words
A film-paper fiber layer laminate comprising a film selected from the group consisting of a polyvinyl chloride film, a polyethylene film, a polypropylene film, a polystyrene film, a polyacetate film, a polycarbonate film, a polyester film, a polyamide film, a polyimide film and a chlorinated rubber film; and a thin paper fiber layer bonded to the film, the basis weight of the paper fiber layer being 5 to 15 g/m 2 .
Claim 3
Dependent Claim
27 words
A film-paper fiber layer laminate as set forth in claim 1, wherein the basis weight of the paper fiber layer is 5 to 8 g/m 2 .
Claim 4
Dependent Claim
29 words
A film-paper fiber layer laminate as set forth in claim 1 or 2, wherein the paper fiber layer is a fiber layer of a Japanese paper or machine-made paper.
References Cited (Backward Citations)
US1323021A
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US1758502A
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US3837946A
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US3690985A
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US4242418A
Cited
US4341839A
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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) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |