Patent US4486762A successfully refreshed from Google Patents.
US4486762A
Expired / Lapsed
US
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Self-contained type pressure sensitive record sheet
Assignee: New Oji Paper Co Ltd
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Filing: 1982-11-04
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Granted: 1984-12-04
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Expires: 2002-11-04
Abstract
Abstract A self-contained type pressure sensitive record sheet prepared by coating a substrate with a mixture of a color acceptor and microcapsules containing a color former in the form of a single layer and drying the resulting coating, the mixture containing 40 to 200 parts by weight, per 100 parts by weight of the microcapsules calculated as solids, of a pulp powder having a weight average fiber length of 20 to 80 mu , has well-balanced improved properties in respect of color forming ability, prevention of color smudging and printability.
Inventors
- 👤 Shigeo Okamoto
- 👤 Tomoharu Shiozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:55
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/1243; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/253
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
75 words
A self-contained type pressure sensitive record sheet prepared by coating a substrate with a mixture of a color acceptor and microcapsules containing a color former in the form of a single layer and drying the resulting coating, the mixture containing 40 to 200 parts by weight, per 100 parts by weight of the microcapsules calculated as solids, of a pulp powder having a weight average fiber length (TAPPI standard T232, SU-68) of 20 to 80μ.
Claim 2
Dependent Claim
75 words
A self-contained type pressure sensitive record sheet prepared by coating a substrate with a mixture of a color acceptor and microcapsules containing a color former in the form of a single layer and drying the resulting coating, the mixture containing 40 to 200 parts by weight, per 100 parts by weight of the microcapsules calculated as solids, of a pulp powder having a weight average fiber length (TAPPI standard T232, SU-68) of 20 to 80μ.
Claim 3
Dependent Claim
39 words
A self-contained type pressure sensitive record sheet as defined in claim 1 wherein the pulp powder is incorporated in an amount of 50 to 100 parts by weight per 100 parts by weight of the microcapsules calculated as solids.
References Cited (Backward Citations)
US2711375A
Cited
GB1232347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-04 | 1988-06-04 | 1988-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-04 | 1992-06-04 | 1992-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-04 | 1996-06-04 | 1996-12-04 | $7700.00 | Window Closed / Lapsed |