US5187002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrothermal transfer sheet
Assignee: DAI NIPPON INSATSU KABUAHIKI KAISHA
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Filing: 1989-09-21
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Granted: 1993-02-16
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Expires: 2009-09-21
Abstract
Abstract The electrothermal transfer sheet of the present invention comprises a substrate sheet, at least one resistor layer formed on one surface of the substrate sheet and a dye layer comprising a heat-migratable dye and a binder, which is formed on the other surface of the substrate sheet. This transfer sheet is characterized in that at least one resistor layer has a positive resistance-temperature coefficient, the ratio R 100 /R 25 of the resistance value (R 100 ) at 100° C. to the resistance value (R 25 ) at 25° C. in the resistor layer is at least 1.2 and the ratio R 200 /R 100 of the resistance value (R 200 ) at 200° C. to the resistance value (R 100 ) at 100° C. in the resistor layer is at least 2.5. By maintaining these resistance-temperature characteristics, heat fusion bonding can be effectively prevented at the printing operation, and the printing sensitivity and image quality can be improved.
Inventors
- 👤 Noritaka Egashira
- 👤 Naoto Satake
- 👤 Masanori Akada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:32
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/3825; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/24917; Y10T428/25; Y10T428/26; Y10T428/266; Y10T428/30
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
128 words
An electrothermal transfer sheet comprising: a substrate sheet; a dye layer comprising a sublimable dye and a binder, said dye layer being formed on one side of said substrate sheet; and at least one resistor layer formed on the other side of said substrate sheet, wherein said at least one resistor layer has a positive temperature coefficient of resistance, a ratio R 100 /R 25 of the resistance value, R 100 , at 100° C. to the resistance value, R 25 , at 25° C. in the resistor layer of at least 1.2, and a ratio R 200 /R 100 of the resistance value, R 200 , at 200° C. to the resistance value, R 100 , at 100° C. in the resistor layer of at least 2.5.
Claim 2
Dependent Claim
128 words
An electrothermal transfer sheet comprising: a substrate sheet; a dye layer comprising a sublimable dye and a binder, said dye layer being formed on one side of said substrate sheet; and at least one resistor layer formed on the other side of said substrate sheet, wherein said at least one resistor layer has a positive temperature coefficient of resistance, a ratio R 100 /R 25 of the resistance value, R 100 , at 100° C. to the resistance value, R 25 , at 25° C. in the resistor layer of at least 1.2, and a ratio R 200 /R 100 of the resistance value, R 200 , at 200° C. to the resistance value, R 100 , at 100° C. in the resistor layer of at least 2.5.
Claim 3
Dependent Claim
20 words
The electrothermal transfer sheet of claim 1, wherein said resistor layer comprises a dispersion of electroconductive particles in a resin.
Claim 4
Dependent Claim
17 words
The electrothermal transfer sheet of claim 2, wherein said resin comprises a resin crosslinked by ionizing radiation.
Claim 5
Dependent Claim
16 words
The electrothermal transfer sheet of claim 2, wherein said resin comprises a resin crosslinked by heat.
Claim 6
Dependent Claim
41 words
The electrothermal transfer sheet of claim 1, wherein said resistor layer comprises a resin and carbon particles, and the content of the carbon particles is not greater than 230 parts by weight based on 100 parts by weight of said resin.
Claim 7
Dependent Claim
39 words
The electrothermal transfer sheet of claim 1, wherein said resistor layer comprises a resin and carbon particles, and the content of the carbon particles is between 65-150 parts by weight based on 100 parts by weight of said resin.
Claim 8
Dependent Claim
15 words
The electrothermal transfer sheet of claim 1, wherein said resistor layer contains a slip agent.
Claim 9
Dependent Claim
30 words
The electrothermal transfer sheet of claim 1, further comprising an adhesive layer formed between said resistor layer and said substrate sheet, or between said substrate sheet and said dye layer.
Claim 10
Dependent Claim
34 words
The electrothermal transfer sheet of claim 1, further comprising an adhesive layer formed between said resistor layer and said substrate sheet, and an adhesive layer formed between said substrate sheet and said dye layer.
Claim 11
Dependent Claim
21 words
The electrothermal transfer sheet of claim 1, further comprising an adhesive layer formed between said substrate sheet and said dye layer.
Claim 12
Dependent Claim
115 words
An electrothermal transfer sheet comprising: a substrate sheet comprising an electrothermal sheet; and a dye layer comprising a sublimable dye and a binder, said dye layer being formed on one side of said substrate sheet; wherein said substrate sheet has a positive temperature coefficient of resistance, a ratio R 100 /R 25 of the resistance value, R 100 , at 100° C. to the resistance value, R 25 , at 25° C. in the resistor layer of at least 1.2, and a ratio R 200 /R 100 of the resistance value, R 200 , at 200° C. to the resistance value, R 100 , at 100° C. in the resistor layer of at least 2.5.
Claim 13
Dependent Claim
115 words
An electrothermal transfer sheet comprising: a substrate sheet comprising an electrothermal sheet; and a dye layer comprising a sublimable dye and a binder, said dye layer being formed on one side of said substrate sheet; wherein said substrate sheet has a positive temperature coefficient of resistance, a ratio R 100 /R 25 of the resistance value, R 100 , at 100° C. to the resistance value, R 25 , at 25° C. in the resistor layer of at least 1.2, and a ratio R 200 /R 100 of the resistance value, R 200 , at 200° C. to the resistance value, R 100 , at 100° C. in the resistor layer of at least 2.5.
Claim 14
Dependent Claim
20 words
The electrothermal transfer sheet of claim 11, wherein said substrate sheet comprises a dispersion of electroconductive particles in a resin.
Claim 15
Dependent Claim
17 words
The electrothermal transfer sheet of claim 12, wherein said resin comprises a resin crosslinked by ionizing radiation.
Claim 16
Dependent Claim
16 words
The electrothermal transfer sheet of claim 12, wherein said resin comprises a resin crosslinked by heat.
Claim 17
Dependent Claim
41 words
The electrothermal transfer sheet of claim 14, wherein said substrate sheet comprises a resin and carbon particles, and the content of the carbon particles is not greater than 230 parts by weight based on 100 parts by weight of said resin.
Claim 18
Dependent Claim
39 words
The electrothermal transfer sheet of claim 11, wherein said substrate sheet comprises a resin and carbon particles, and the content of the carbon particles is between 65-150 parts by weight based on 100 parts by weight of said resin.
Claim 19
Dependent Claim
15 words
The electrothermal transfer sheet of claim 11, wherein said substrate sheet contains a slip agent.
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) | 1996-02-16 | 1996-08-17 | 1997-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-16 | 2000-08-17 | 2001-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-02-16 | 2004-08-17 | 2005-02-16 | $7700.00 | Window Closed / Lapsed |