US4897377A
Expired / Lapsed
US
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Receiver sheet
Assignee: Imperial Chemical Industries Ltd
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Filing: 1988-04-19
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Granted: 1990-01-30
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Expires: 2008-04-19
Abstract
Abstract A thermal transfer printing (TTP) receiver sheet has a receiving layer comprising an amorphous synthetic thermoplastics polymer.
Inventors
- 👤 Richard A. Marbrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:44
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/50; B41M5/52; B41M5/26; B41M5/40; B41M5/41; B41M2205/00; B41M2205/32; B41M5/5263; B41M5/5272; G; G05; G05B; G05B2219/00; G05B2219/30; G05B2219/41; G05B2219/41435; G05B2219/42; G05B2219/42337; G05B2219/42352; G05B2219/43; G05B2219/43162; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10S430/00; Y10S430/142; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/25; Y10T428/258; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
102 words
A thermal transfer printing receiver sheet for use in association with a compatible donor sheet, the receiver sheet comprising a supporting substrate having, on at least one surface thereof, a dye-receptive receiving layer to receive a dye thermally transferred from the donor sheet, wherein (a) the substrate comprises an opaque, molecularly oriented film of a synthetic linear polyester, and (b) the at least one receiving layer has a thickness not exceeding 7.5 μm, and comprises a dye-receptive, essentially amorphous, synthetic polyester resin containing one or more glycols selected from the group consisting of ethylene glycol, diethylene glycol, triethylene glycol and neopentyl glycol.
Claim 2
Dependent Claim
102 words
A thermal transfer printing receiver sheet for use in association with a compatible donor sheet, the receiver sheet comprising a supporting substrate having, on at least one surface thereof, a dye-receptive receiving layer to receive a dye thermally transferred from the donor sheet, wherein (a) the substrate comprises an opaque, molecularly oriented film of a synthetic linear polyester, and (b) the at least one receiving layer has a thickness not exceeding 7.5 μm, and comprises a dye-receptive, essentially amorphous, synthetic polyester resin containing one or more glycols selected from the group consisting of ethylene glycol, diethylene glycol, triethylene glycol and neopentyl glycol.
Claim 3
Dependent Claim
22 words
A receiver sheet according to claim 1 wherein the substrate is voided, thus containing at least a proportion of discrete closed cells.
Claim 4
Dependent Claim
32 words
A receiver sheet according to claim 2 wherein the substrate contains an effective amount of a voiding agent selected from the group comprising an incompatible resin filler and a particulate inorganic filler.
Claim 5
Dependent Claim
37 words
A receiver sheet according to claim 3 wherein the average particle size of the inorganic filler is from 0.1 to 10.0 μm, the actual particle size of 99.9% by number of the particles not exceeding 30 μm.
Claim 6
Dependent Claim
14 words
A receiver sheet according to claim 3 wherein the inorganic filler comprises barium sulphate.
Claim 7
Dependent Claim
20 words
A receiver sheet according to claim 1 wherein the thickness of the receiving layer is from 0.5 to 5.0 μm.
Claim 8
Dependent Claim
14 words
A receiver sheet according to claim 1 wherein the dye-receptive polymer comprises a copolyester.
Claim 9
Dependent Claim
20 words
A receiver sheet according to claim 7 wherein the dye-receptive polymer comprises a copolymer of ethylene terephthalate and ethylene isophthalate.
Claim 10
Dependent Claim
18 words
A receiver sheet according to claim 1 comprising a receiving layer additionally being provided with a release medium.
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) | 1993-01-29 | 1993-07-31 | 1994-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-29 | 1997-07-31 | 1998-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-29 | 2001-07-31 | 2002-01-30 | $7700.00 | Window Closed / Lapsed |