Patent US5286559A successfully refreshed from Google Patents.
US5286559A
Expired / Lapsed
US
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Thermal transfer sheet
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1993-02-24
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Granted: 1994-02-15
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Expires: 2013-02-24
Abstract
Abstract A thermal transfer sheet comprising a substratte film, a transferable ink layer formed on one surface side of the substrate film, and a back coating layer formed on the other surface side of the substrate film to be in contact with a thermal head, wherein the transferable ink layer comprises a heat-fusible ink capable of being melted under heating, and the back coating layer comprises a binder predominantly comprising polyparabanic acid.
Inventors
- 👤 Hirokazu Kaneko
- 👤 Hideichiro Takeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:31
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; B41M5/44; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
108 words
A thermal transfer sheet comprising substrate film, a transferable ink layer formed on one surface side of the substrate film, and a back coating layer formed on the other surface side of the substrate film to be in contact with a thermal head; wherein the transferable ink layer comprises a heat-fusible ink capable of being melted under heating, and the back coating layer comprises a binder predominantly comprising polyparabanic acid wherein said polyparabanic acid comprises a polymer prepared by hydrolyzing a cyclic addition polymer which is prepared by a hydrogen cyanide and a diisocyanate compound selected from at least one of 2, 4-tolylene diisocyanate and 2, 6-tolylene diisocyanate.
Claim 2
Dependent Claim
108 words
A thermal transfer sheet comprising substrate film, a transferable ink layer formed on one surface side of the substrate film, and a back coating layer formed on the other surface side of the substrate film to be in contact with a thermal head; wherein the transferable ink layer comprises a heat-fusible ink capable of being melted under heating, and the back coating layer comprises a binder predominantly comprising polyparabanic acid wherein said polyparabanic acid comprises a polymer prepared by hydrolyzing a cyclic addition polymer which is prepared by a hydrogen cyanide and a diisocyanate compound selected from at least one of 2, 4-tolylene diisocyanate and 2, 6-tolylene diisocyanate.
Claim 3
Dependent Claim
25 words
A thermal transfer sheet according to claim 1, wherein the polyparabanic acid has an intrinsic viscosity of 0.3 to 3 at 30° C. in dimethyl-formamide.
Claim 4
Dependent Claim
27 words
A thermal transfer sheet according to claim 1, wherein the back coating layer has a thickness of 0.1 to 0.6 g/m 2 based on its solid content.
Claim 5
Dependent Claim
80 words
A thermal transfer sheet comprising a substrate film, a transferable ink layer formed on one surface side of the substrate film, and a back coating layer formed on the other surface side of the substrate film to be in contact with a thermal head; wherein the transferable ink layer comprises a heat-fusible ink capable of being melted under heating, and the back coating layer comprises a binder predominantly comprising polyparabanic acid and a linear polyester resin as an adhesive resin.
Claim 6
Dependent Claim
80 words
A thermal transfer sheet comprising a substrate film, a transferable ink layer formed on one surface side of the substrate film, and a back coating layer formed on the other surface side of the substrate film to be in contact with a thermal head; wherein the transferable ink layer comprises a heat-fusible ink capable of being melted under heating, and the back coating layer comprises a binder predominantly comprising polyparabanic acid and a linear polyester resin as an adhesive resin.
Claim 7
Dependent Claim
37 words
A thermal transfer sheet according to claim 4, wherein the linear polyester resin is mixed in the back coating layer in an amount of 1 to 50 wt. parts per 100 wt. parts of the polyparabanic acid.
Claim 8
Dependent Claim
23 words
A thermal transfer sheet according to claim 4, wherein the linear polyester resin has a glass transition point of 50° C. or higher.
Claim 9
Dependent Claim
27 words
A thermal transfer sheet according to claim 4, wherein the back coating layer has a thickness of 0.1 to 0.6 g/m 2 based on its solid content.
Claim 10
Dependent Claim
92 words
A thermal transfer sheet comprising a substrate film, a transferable ink layer formed on one surface side of the substrate film, and a back coating layer formed on the other surface side of the substrate film to be in contact with a thermal head, wherein the transferable ink layer comprises a heat-fusible ink capable of being melted under heating, and the back coating layer of a two-layer structure comprising a primer layer having a thickness of 0.05 to 0.5/μm and comprising a linear polyester resin and a layer predominantly comprising polyparabanic acid.
Claim 11
Dependent Claim
92 words
A thermal transfer sheet comprising a substrate film, a transferable ink layer formed on one surface side of the substrate film, and a back coating layer formed on the other surface side of the substrate film to be in contact with a thermal head, wherein the transferable ink layer comprises a heat-fusible ink capable of being melted under heating, and the back coating layer of a two-layer structure comprising a primer layer having a thickness of 0.05 to 0.5/μm and comprising a linear polyester resin and a layer predominantly comprising polyparabanic acid.
Claim 12
Dependent Claim
23 words
A thermal transfer sheet according to claim 8, wherein the linear polyester resin has a glass transition point of 50° C. or higher.
Claim 13
Dependent Claim
27 words
A thermal transfer sheet according to claim 8, wherein the back coating layer has a thickness of 0.1 to 0.6 g/m 2 based on its solid content.
References Cited (Backward Citations)
US4806422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-14 | 1997-08-16 | 1998-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-14 | 2001-08-16 | 2002-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-14 | 2005-08-16 | 2006-02-15 | $7700.00 | Window Closed / Lapsed |