US3871065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal printing process
Assignee: General Co Ltd
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Filing: 1972-08-02
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Granted: 1975-03-18
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Expires: 1992-08-02
Abstract
Abstract A thermal printing process is disclosed in which an image is formed on a heat-sensitive recording sheet composed of a support having superposed thereon a heatsensitive layer which is composed of a heat-sensitive composition dispersed in a binder therefor, the process comprising contacting a thermally-heated print head with the surface of the heat-sensitive layer to thereby form the printed image thereon, wherein the improvement comprises eliminating exfoliation of the heat-sensitive layer by employing as the binder either methyl cellulose or acetyl cellulose having a melting point of not lower than 180*C.
Inventors
- 👤 Yoshimichi Iomiyama
- 👤 Takashi Yamahata
- 👤 Tomoya Yasuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:41
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3372; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
IN A THERMAL PRINTING PROCESS FOR FORMING AN IMAGE ON A HEAT-SENSITIVE RECORDING SHEET COMPOSED OF A SUPPORT HAVING SUPERPOSED THEREON A HEAT-SENSITIVE LAYER WHICH IS COMPOSED OF A HEAT-SENSITIVE COMPOSITION DISPERSED IN A BINDER THEREFOR, SAID PROCESS COMPRISING CONTACTING A THERMALLY-HEATED PRINT HEAD WITH THE SURFACE OF THE HEAT-SENSITIVE LAYER TO FORM A PRINTED IMAGE THEREON, THE IMPROVEMENT COMPRISING ELIMINATING EXFOLIATION OF THE HEAT-SENSITIVE LAYER FROM THE SUPPORT BY EMPLOYING, AS THE BINDER, A MEMBER SELECTED FROM THE GROUP CONSISTING OF METHYL CELLULOSE AND ACETYLCELLULOSE HAVING A MELTING POINT OF NOT LOWER THAN 180*C.
Claim 2
Dependent Claim
95 words
IN A THERMAL PRINTING PROCESS FOR FORMING AN IMAGE ON A HEAT-SENSITIVE RECORDING SHEET COMPOSED OF A SUPPORT HAVING SUPERPOSED THEREON A HEAT-SENSITIVE LAYER WHICH IS COMPOSED OF A HEAT-SENSITIVE COMPOSITION DISPERSED IN A BINDER THEREFOR, SAID PROCESS COMPRISING CONTACTING A THERMALLY-HEATED PRINT HEAD WITH THE SURFACE OF THE HEAT-SENSITIVE LAYER TO FORM A PRINTED IMAGE THEREON, THE IMPROVEMENT COMPRISING ELIMINATING EXFOLIATION OF THE HEAT-SENSITIVE LAYER FROM THE SUPPORT BY EMPLOYING, AS THE BINDER, A MEMBER SELECTED FROM THE GROUP CONSISTING OF METHYL CELLULOSE AND ACETYLCELLULOSE HAVING A MELTING POINT OF NOT LOWER THAN 180*C.
Claim 3
Dependent Claim
45 words
The process of claim 1 wherein the binder is acetyl cellulose having a weight average molecular weight from 28,000 to 58,000, a degree of polymerization from 175 to 360 and a viscosity from 10 to 40 seconds based on ASTM E standard at 20% concentration.
Claim 4
Dependent Claim
41 words
The process of claim 1 wherein the binder is methyl cellulose having a weight average molecular weight from 26,000 to 63,000, a degree of polymerization from 140 to 340 and a viscosity from 8 to 120 cps at 2% aqueous solution.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |