US4824437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal transfer printing sheet and process
Assignee: Imperial Chemical Industries Ltd
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Filing: 1987-12-17
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Granted: 1989-04-25
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Expires: 2007-12-17
Abstract
Abstract A thermal transfer printing sheet comprising a substrate having a coating comprising an anthraquinone dye of the formula: <IMAGE> wherein R is C1-6-alkyl, C4-8 -cycloalkyl or C2-6-alkenyl; R1 is C1-6-alkyl or C2-6-alkenyl; and R2 is H or C1-6-alkyl or C2-6-alkenyl, and its use in the preparation of a printed image on a receiver sheet by selective heating of the transfer sheet, in accordance with a pattern information signal, while in contact with the receiver sheet.
Inventors
- 👤 Peter Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:49
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/385; B41M5/3852; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
67 words
A thermal transfer printing sheet comprising a substrate having a thickness less than 10 micrometers, carrying a coating comprising a resin or polymeric binder and an anthraquinone dye of the formula: ##STR7## wherein R is C 1-6 -alkyl, C 4-8 -cycloalkyl or C 2-6 -alkenyl; R 1 is C 1-6 -alkyl or C 2-6 -alkenyl; and R 2 is H, C 1-6 -alkyl or C 2-6 -alkenyl.
Claim 2
Dependent Claim
67 words
A thermal transfer printing sheet comprising a substrate having a thickness less than 10 micrometers, carrying a coating comprising a resin or polymeric binder and an anthraquinone dye of the formula: ##STR7## wherein R is C 1-6 -alkyl, C 4-8 -cycloalkyl or C 2-6 -alkenyl; R 1 is C 1-6 -alkyl or C 2-6 -alkenyl; and R 2 is H, C 1-6 -alkyl or C 2-6 -alkenyl.
Claim 3
Dependent Claim
16 words
A thermal transfer printing sheet according to claim 1 wherein R is branched C 3-5 -alkyl.
Claim 4
Dependent Claim
19 words
A thermal transfer printing sheet according to claim 1 wherein R 1 is 4-methyl and R 2 is H.
Claim 5
Dependent Claim
28 words
A thermal transfer printing sheet comprising a substrate having a thickness less than 10 micrometers, carrying a coating comprising a resin or polymeric binder and the dye 1-i-propylamino-4-(4-methylphenylamino)-anthraquinone.
Claim 6
Dependent Claim
28 words
A thermal transfer printing sheet comprising a substrate having a thickness less than 10 micrometers, carrying a coating comprising a resin or polymeric binder and the dye 1-i-propylamino-4-(4-methylphenylamino)-anthraquinone.
Claim 7
Dependent Claim
19 words
A thermal transfer printing sheet according to claim 1 wherein the polymeric binder is ethylhydroxyethyl cellulose or ethyl cellulose.
Claim 8
Dependent Claim
28 words
A thermal transfer printing sheet according to claim 1 wherein the resin or polymeric binder is solvent-soluble and the dye is dissolved in the resin or polymeric binder.
Claim 9
Dependent Claim
19 words
A thermal transfer printing sheet according to claim 6 wherein the polymeric binder is ethylhydroxyethyl cellulose or ethyl cellulose.
Claim 10
Dependent Claim
82 words
A thermal transfer printing sheet comprising a substrate selected from capacitor paper, polyester, polyacrylate, polyamide, cellulosic and polyalkylene films and metallised forms thereof and laminates incorporating a polyester, the substrate having a coating comprising a resin or polymeric binder and an anthraquinone dye of the formula: ##STR8## wherein R is C 1-6 -alkyl, C 4-8 -cycloalkyl or C 2-6 -alkenyl; R 1 is C 1-6 -alkyl or C 2-6 -alkenyl; and R 2 is H, C 1-6 -alkyl or C 2-6 -alkenyl.
Claim 11
Dependent Claim
82 words
A thermal transfer printing sheet comprising a substrate selected from capacitor paper, polyester, polyacrylate, polyamide, cellulosic and polyalkylene films and metallised forms thereof and laminates incorporating a polyester, the substrate having a coating comprising a resin or polymeric binder and an anthraquinone dye of the formula: ##STR8## wherein R is C 1-6 -alkyl, C 4-8 -cycloalkyl or C 2-6 -alkenyl; R 1 is C 1-6 -alkyl or C 2-6 -alkenyl; and R 2 is H, C 1-6 -alkyl or C 2-6 -alkenyl.
Claim 12
Dependent Claim
88 words
A thermal transfer printing process which comprises contacting a thermal transfer printing sheet according to claim 1 with a receiver sheet, so that the surface of the transfer sheet carrying the dye is in contact with the receiver sheet and selectively heating areas of the opposite side of the transfer sheet at a temperature from 300° C. to 400° C. for a period of from 1 to 10 milliseconds in order that dye in the heated areas of the transfer sheet is selectively transferred to the receiver sheet.
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JPS5993389A
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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) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |