US4968658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal transfer receiver
Assignee: Imperial Chemical Industries Ltd
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Filing: 1989-11-08
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Granted: 1990-11-06
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Expires: 2009-11-08
Abstract
Abstract A receiver for dye diffusion thermal transfer printing comprises a substrate supporting a receiver coat comprising a dye-receptive material and a dye permeable release agent, characterized in that the receiver coat also contains dissolved or dispersed therein a Bisphenol A-based unsaturated polyester adhesive, to reduce printing adhesion.
Inventors
- 👤 Nicholas C. Beck
- 👤 John A. Pope
- 👤 Richard A. Hann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:04
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/50; B41M5/52; B41M5/5263; B41M5/5272; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10S430/00; Y10S430/142; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31786; Y10T428/31794
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
47 words
A thermal transfer printing receiver comprising a substrate having a surface on which is supported a receiver coat, the latter comprising a dye-receptive material and a dye-permeable release agent, characterised in that the receiver coat also contains dissolved or dispersed therein an alkoxylated Bisphenol A-based unsaturated polyester.
Claim 2
Dependent Claim
47 words
A thermal transfer printing receiver comprising a substrate having a surface on which is supported a receiver coat, the latter comprising a dye-receptive material and a dye-permeable release agent, characterised in that the receiver coat also contains dissolved or dispersed therein an alkoxylated Bisphenol A-based unsaturated polyester.
Claim 3
Dependent Claim
26 words
A thermal transfer printing receiver as claimed in claim 1, characterised in that the unsaturated polyester comprises a polyester of ethoxylated Bisphenol A and fumaric acid.
Claim 4
Dependent Claim
32 words
A thermal transfer printing receiver as claimed in claim 1, characterised in that the unsaturated polyester contains a polyfunctional constituent which on polyesterification provides the unsaturated polyester with a degree of crosslinking.
Claim 5
Dependent Claim
46 words
A thermal transfer printing receiver as claimed in claim 3, characterised in that a small proportion of the Bisphenol A component of the unsaturated polyester is replaced by a polyhydric alcohol having a functionality greater than two, thereby to provide the crosslinking in the unsaturated polyester.
Claim 6
Dependent Claim
29 words
A thermal transfer printing receiver as claimed in claim 1, characterised in that the quantity of unsaturated polyester is within the range 1-10% by weight of the dye-receptive material.
Claim 7
Dependent Claim
20 words
A thermal transfer printing receiver as claimed in claim 1, characterised in that the dye-receptive material is a saturated polyester.
Claim 8
Dependent Claim
21 words
A thermal transfer printing receiver as claimed in claim 1, characterised in that the release agent is a cross-linked silicone polymer.
References Cited (Backward Citations)
US4097230A
Cited
EP0228066A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-05 | 1994-05-07 | 1994-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-05 | 1998-05-07 | 1998-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-05 | 2002-05-07 | 2002-11-06 | $7700.00 | Window Closed / Lapsed |