Patent US4650494A successfully refreshed from Google Patents.
US4650494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer printing sheet
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1984-11-05
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Granted: 1987-03-17
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Expires: 2004-11-05
Abstract
Abstract A heat tranfer printing sheet comprises a substrate sheet and a heat transfer printing layer superposed thereon. The heat transfer printing layer includes a polyvinyl butyral resin having specific characteristics as a binder resin and a dye which is to be transferred to a heat transferable sheet upon being heated.
Inventors
- 👤 Masaki Kutsukake
- 👤 Masanori Akada
- 👤 Mineo Yamauchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:41
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/392; B41M5/395; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
90 words
A heat transfer printing sheet comprising a substrate sheet and a heat transfer printing layer superposed thereon, said heat transfer printing layer comprising a binder resin containing a sublimable dye which is to be transferred to a heat transferable sheet upon being heated and containing at least 90% by weight of a polyvinyl butyral resin having (a) a molecular weight of from 60,000 to 200,000, (b) a glass transition temperature of from 60° C. to 110° C. and (c) a vinyl alcohol content of from 10% to 40% by weight.
Claim 2
Dependent Claim
90 words
A heat transfer printing sheet comprising a substrate sheet and a heat transfer printing layer superposed thereon, said heat transfer printing layer comprising a binder resin containing a sublimable dye which is to be transferred to a heat transferable sheet upon being heated and containing at least 90% by weight of a polyvinyl butyral resin having (a) a molecular weight of from 60,000 to 200,000, (b) a glass transition temperature of from 60° C. to 110° C. and (c) a vinyl alcohol content of from 10% to 40% by weight.
Claim 3
Dependent Claim
24 words
The heat transfer printing sheet according to claim 1 wherein said dye is a heat sublimable disperse dye or a heat sublimable solvent dye.
Claim 4
Dependent Claim
23 words
The heat transfer printing sheet according to claim 2 wherein said disperse dye or said solvent dye is dissolved in the binder resin.
Claim 5
Dependent Claim
29 words
The heat transfer printing sheet according to claim 1, wherein said dye is selected from the group consisting of heat sublimable disperse dye and a heat sublimable solvent dye.
Claim 6
Dependent Claim
146 words
A heat transfer printing sheet for use in printing performed by imparting heat energy corresponding to signals of respective progressive patterns to a laminate of the heat transfer printing sheet and a heat transferable sheet, said heat energy being imparted by means of a thermal head, said heat transfer printing sheet comprising a substrate sheet and a heat transfer printing layer superposed thereon, said heat transfer printing layer comprising a binder resin, said binder resin including a sublimable dye which is to be transferred to the heat transfer sheet upon being heated and at least 90% by weight of a polyvinyl butyral resin having (a) a molecular weight of from 60,000 to 200,000, (b) a glass transition temperature of from 60° C. to 110° C. and (c) a vinyl alcohol content of from 10% to 40% by weight, said dye being dissolved in the binder resin.
Claim 7
Dependent Claim
146 words
A heat transfer printing sheet for use in printing performed by imparting heat energy corresponding to signals of respective progressive patterns to a laminate of the heat transfer printing sheet and a heat transferable sheet, said heat energy being imparted by means of a thermal head, said heat transfer printing sheet comprising a substrate sheet and a heat transfer printing layer superposed thereon, said heat transfer printing layer comprising a binder resin, said binder resin including a sublimable dye which is to be transferred to the heat transfer sheet upon being heated and at least 90% by weight of a polyvinyl butyral resin having (a) a molecular weight of from 60,000 to 200,000, (b) a glass transition temperature of from 60° C. to 110° C. and (c) a vinyl alcohol content of from 10% to 40% by weight, said dye being dissolved in the binder resin.
References Cited (Backward Citations)
DE2547862A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |