US4559273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer sheet
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1985-02-28
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Granted: 1985-12-17
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Expires: 2005-02-28
Abstract
Abstract This invention relates to a novel heat transfer sheet. By providing a heat-resistant protective layer comprising specific ingredients on a first surface of a base sheet having a heat transfer layer on a second surface thereof, there is obtained a heat transfer sheet wherein the running of a thermal head is smooth during recording; wherein an image having a high density and exhibiting no surface roughness at printing areas can be provided; wherein when the heat transfer sheet is wound up and stored, a dye does not migrate to the heat-resistant protective layer; and wherein the adhesion between the heat transfer sheet and a roll or the like does not occur within travelling apparatus.
Inventors
- 👤 Masaki Kutsukake
- 👤 Mineo Yamauchi
- 👤 Masanori Akada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:23
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; B41M2205/00; B41M2205/02; B41M2205/06; B41M2205/36; B41M5/423; B41M5/426; B41M5/44; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/31504; Y10T428/31551; Y10T428/31565; Y10T428/31786
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
65 words
A heat transfer sheet comprising a heat transfer layer provided on one surface of a base sheet, and a heat-resistant protective layer provided on the other surface of said base sheet, said heat-resistant protective layer containing (a) polyvinyl butyral, (b) an isocyanate, and (c) a compound selected from the group consisting of phosphoric esters, its alkali metal and alkalie earth metal salts, and mixtures thereof.
Claim 2
Dependent Claim
65 words
A heat transfer sheet comprising a heat transfer layer provided on one surface of a base sheet, and a heat-resistant protective layer provided on the other surface of said base sheet, said heat-resistant protective layer containing (a) polyvinyl butyral, (b) an isocyanate, and (c) a compound selected from the group consisting of phosphoric esters, its alkali metal and alkalie earth metal salts, and mixtures thereof.
Claim 3
Dependent Claim
17 words
The heat transfer sheet according to claim 1 wherein said heat-resistant protective layer further contains a filler.
Claim 4
Dependent Claim
41 words
The heat transfer sheet according to claim 2 wherein said filler is selected from the group consisting of calcium carbonate, talc, aluminosilicates, clays, zeolites, Teflon powder, zinc oxide, magnesium oxide, titanium dioxide, silica, carbon, and the condensate of benzoguanamine and formaldehyde.
Claim 5
Dependent Claim
30 words
The heat transfer sheet according to claim 1 wherein said heat transfer layer is a heat sensitive sublimation transfer layer comprising a dye having heat transferability and a binder resin.
Claim 6
Dependent Claim
31 words
The heat transfer sheet according to claim 1 wherein said heat transfer layer is a heat sensitive fusing transfer layer wherein a dye or pigment is dispersed in a wax material.
Claim 7
Dependent Claim
23 words
The heat transfer sheet according to claim 1 wherein said alkali metal salt of phosphoric ester is a sodium salt of phosphoric ester.
Claim 8
Dependent Claim
44 words
The heat transfer sheet according to claim 1 which further comprises a heat-resistant layer interposed between said base sheet and said heat-resistant protective layer, said heat-resistant layer being obtained by curing with a curing agent a synthetic resin capable of curing upon being heated.
Claim 9
Dependent Claim
53 words
The heat transfer sheet according to claim 7 wherein the combination of said synthetic resin capable of curing upon being heated and said curing agent from which said heat-resistant layer is produced is selected from the group consisting of polyvinyl butyral/polyhydric isocyanates, acryl polyol/polyhydric isocyanates, cellulose acetate/titanium chelating agents, and polyester/organic titanium compounds.
Claim 10
Dependent Claim
20 words
The heat transfer sheet according to claim 7 wherein said heat-resistant layer and/or said heat-resistant protective layer contain a filler.
Claim 11
Dependent Claim
41 words
The heat transfer sheet according to claim 9 wherein said filler is selected from the group consisting of calcium carbonate, talc, aluminosilicates, clays, zeolites, Teflon powder, zinc oxide, magnesium oxide, titanium dioxide, silica, carbon, and the condensate of benzoguanamine and formaldehyde.
References Cited (Backward Citations)
GB2060920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |