Patent US4946826A successfully refreshed from Google Patents.
US4946826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal transfer sheet comprising an improved ink layer
Assignee: ALL TRUSS HOMES OF AMERICA Inc
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Filing: 1989-07-18
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Granted: 1990-08-07
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Expires: 2009-07-18
Abstract
Abstract A thermal transfer sheet is provided which comprises a support and an ink layer formed on one side of the support. The ink layer is made of a composition of a sublimable dye and a resin binder comprised of not less than 15 parts by weight of an epoxy resin and not less than 30 parts by weight of a butyral resin. The resin binder is effective in suppressing soiling on a sheet to be transferred as will be caused by the dye additionally deposited on the background of the thermal transfer sheet during the thermal printing procedure.
Inventors
- 👤 Naoyuki Kubo
- 👤 Kiyoshi Senzaki
- 👤 Yuji Kikuchi
- 👤 Tsutomu Yashiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:59
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; Y10T428/31504; Y10T428/31507; Y10T428/31855
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
78 words
A thermal transfer sheet which comprises a support and an ink layer formed on the support and made of a composition of a dye capable of sublimation by application of heat and a resin mixture comprised of not less than 15 parts by weight of an epoxy resin and not less than 30 parts by weight of a butyral resin provided that the total amount of the epoxy resin and the butyral resin is 100 parts by weight.
Claim 2
Dependent Claim
78 words
A thermal transfer sheet which comprises a support and an ink layer formed on the support and made of a composition of a dye capable of sublimation by application of heat and a resin mixture comprised of not less than 15 parts by weight of an epoxy resin and not less than 30 parts by weight of a butyral resin provided that the total amount of the epoxy resin and the butyral resin is 100 parts by weight.
Claim 3
Dependent Claim
22 words
The thermal transfer sheet according to claim 1, wherein said resin mixture consists essentially of the epoxy resin and the butyral resin.
Claim 4
Dependent Claim
32 words
The thermal transfer sheet according to claim 2, wherein said epoxy resin is contained in an amount of from 20 to 70 parts by weight with the balance of the butyral resin.
Claim 5
Dependent Claim
22 words
The thermal transfer sheet according to claim 1, wherein said epoxy resin has an average molecular weight of not less than 10,000.
Claim 6
Dependent Claim
22 words
The thermal transfer sheet according to claim 4, wherein said epoxy resin has an average molecular weight of not less than 50,000.
Claim 7
Dependent Claim
26 words
The thermal transfer sheet according to claim 1, wherein said dye and said resin mixture are used at a ratio by weight of 3:1 to 1:5.
Claim 8
Dependent Claim
27 words
The thermal transfer sheet according to claim 1, further comprising a lubricating, heat-resistant layer formed on a side opposite to the ink layer side of the support.
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) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |