US4963522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer sheet
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1988-11-18
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Granted: 1990-10-16
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Expires: 2008-11-18
Abstract
Abstract A heat transfer sheet for an electrothermal transfer system including a dye layer containing a heat migratable dye on one surface of a substrate sheet and a resistance layer which generates heat by electrical current flow on the other surface of the substrate sheet. The heat transfer sheet is characterized in that a slip property imparting agent for lowering the frictional resistance between the resistance layer and electrode head during transfer is contained in the resistance layer.
Inventors
- 👤 Noritaka Egashira
- 👤 Naoto Satake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:00
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/3825; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
88 words
A heat transfer sheet for an electrothermal transfer system, comprising: a substrate sheet; a dye layer formed on one surface of said substrate sheet, said dye layer comprising a sublimable dye and a binder; and a resistance layer which is capable of generating heat by electrical current formed on the other surface of said substrate sheet, said resistance layer comprising a heat-resistant resin, an electroconductive substance and a slip property imparting agent for lowering the frictional resistance between the resistance layer and an electrode head during electrothermal transfer.
Claim 2
Dependent Claim
88 words
A heat transfer sheet for an electrothermal transfer system, comprising: a substrate sheet; a dye layer formed on one surface of said substrate sheet, said dye layer comprising a sublimable dye and a binder; and a resistance layer which is capable of generating heat by electrical current formed on the other surface of said substrate sheet, said resistance layer comprising a heat-resistant resin, an electroconductive substance and a slip property imparting agent for lowering the frictional resistance between the resistance layer and an electrode head during electrothermal transfer.
Claim 3
Dependent Claim
29 words
A heat transfer sheet according to claim 1, wherein said slip property imparting agent comprises at least one material selected from the group consisting of organic lubricants and surfactants.
Claim 4
Dependent Claim
15 words
A heat transfer sheet according to claim 2, wherein said surfactant comprises a nonionic surfactant.
Claim 5
Dependent Claim
17 words
A heat transfer sheet according to claim 1, wherein said heat-resistant resin comprises a crosslinking curable resin.
Claim 6
Dependent Claim
51 words
A heat transfer sheet according to claim 1, wherein said resistance layer comprises a low resistance layer having a surface resistance value of 100 to 1000 Ω/□ and (b) a high resistance layer having a surface resistance value of 1 to 20 KΩ/□ laminated in this order on said substrate sheet.
Claim 7
Dependent Claim
30 words
A heat transfer sheet according to claim 5, wherein the difference in surface resistance value between said low resistance layer and said high resistance layer is 900 Ω/□ or more.
References Cited (Backward Citations)
EP0059308A2
Cited
EP0138483A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-15 | 1994-04-16 | 1994-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-15 | 1998-04-16 | 1998-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-15 | 2002-04-16 | 2002-10-16 | $7700.00 | Window Closed / Lapsed |