Patent US4123580A successfully refreshed from Google Patents.
US4123580A
Expired / Lapsed
US
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Color source sheet with rubber binder
Assignee: 3M Co
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Filing: 1977-06-23
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Granted: 1978-10-31
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Expires: 1997-06-23
Abstract
Abstract A color source sheet consisting of a thin porous paper receptive to printing ink, typewriter, pencil copy, electrostatic copiers, etc. and having on one surface a thin uniform coating comprising rubber binder, particulate heat-volatilizable dye and particulate filler which is non-absorptive of the dye. The dye is transferable by thermographic heating at temperatures readily available in commercial thermographic copying machines.
Inventors
- 👤 Victor R. Franer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:58
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/392; B41M5/395; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249962; Y10T428/249963; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
53 words
A color source sheet consisting of a thin porous paper having on one surface a thin uniform coating comprising a rubber binder in which is dispersed particulate heat-volatilizable dye and a particulate filler which is non-absorptive of said dye, wherein said particulate filler has a major dimension no greater than about 35 microns.
Claim 2
Dependent Claim
53 words
A color source sheet consisting of a thin porous paper having on one surface a thin uniform coating comprising a rubber binder in which is dispersed particulate heat-volatilizable dye and a particulate filler which is non-absorptive of said dye, wherein said particulate filler has a major dimension no greater than about 35 microns.
Claim 3
Dependent Claim
22 words
A color source sheet in accordance with claim 1, wherein said particulate filler is selected from cellulosic wood fiber and quartz particles.
Claim 4
Dependent Claim
31 words
A color source sheet in accordance with claim 1 wherein said dye is present in an amount of about 10 to 35% by weight based on the weight of said coating.
Claim 5
Dependent Claim
39 words
A color source sheet in accordance with claim 1 wherein said rubber comprises natural rubber and there is included a polyterpene resin in an amount no greater than about 10% by weight based on the weight of said coating.
Claim 6
Dependent Claim
62 words
A color source sheet in accordance with claim 1, wherein said rubber binder is present in an amount of about 20 to 50% by weight, said dye is present in an amount of about 10 to 35% by weight, and said particulate filler is present in an amount of about 10 to 60% by weight, based on the weight of said coating.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |