Patent US4579770A successfully refreshed from Google Patents.
US4579770A
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Multicolor heat transfer paper
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1984-08-30
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Granted: 1986-04-01
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Expires: 2004-08-30
Abstract
Abstract By using a multicolor heat transfer paper comprising a substrate and a mixture of at least two kinds of microcapsules coated on the substrate (each kind of microcapsules contain a different heat-sublimable dye and have a different film thickness), there can be obtained a clear multicolor transferred image only by the temperature control of the thermal head of a printer.
Inventors
- 👤 Toshihiko Matsushita
- 👤 Sadao Morishita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:59
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/34; B41M5/345; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/249997; Y10T428/25; Y10T428/254
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
79 words
A multicolor heat transfer recording paper comprising a substrate and a mixture of at least two kinds of microcapsules coated on the substrate, each kind of microcapsules containing a different heat-sublimable dye and having a different film thickness, said heat sublimable dye being capable of permeating through the porous membrane film of the microcapsule in a manner which is dependent upon both the heating temperature and the membrane film thickness when the heat-sublimable dye has been heated-sublimated by heating.
Claim 2
Dependent Claim
79 words
A multicolor heat transfer recording paper comprising a substrate and a mixture of at least two kinds of microcapsules coated on the substrate, each kind of microcapsules containing a different heat-sublimable dye and having a different film thickness, said heat sublimable dye being capable of permeating through the porous membrane film of the microcapsule in a manner which is dependent upon both the heating temperature and the membrane film thickness when the heat-sublimable dye has been heated-sublimated by heating.
Claim 3
Dependent Claim
28 words
A multicolor heat transfer paper recording according to claim 1, wherein the heat-sublimable dyes each contained in a particular kind of microcapsules are yellow, magenta, cyan and black.
Claim 4
Dependent Claim
27 words
A multicolor heat transfer recording paper according to claim 1, wherein the heat-sublimable dyes each contained in a particular kind of microcapsules are yellow, magenta and cyan.
Claim 5
Dependent Claim
35 words
A multicolor heat transfer recording paper according to claim 3, wherein the yellow containing microcapsules have the largest film thickness, the magenta-containing microcapsules the medium film thickness and the cyan-containing microcapsules a smallest film thickness.
Claim 6
Dependent Claim
34 words
A multicolor heat transfer recording paper according to claim 3, wherein the yellow-containing microcapsules have the largest film thickness, the cyan-containing microcapsules a medium film thickness and the magneta-containing microcapsules the smallest film thickness.
Claim 7
Dependent Claim
34 words
A multicolor heat transfer recording paper according to claim 3, wherein the magenta-containing microcapsules have the largest film thickness, the yellow-containing microcapsules a medium film thickness and the cyan-containing microcapsules the smallest film thickness.
Claim 8
Dependent Claim
34 words
A multicolor heat transfer recording paper according to claim 3, wherein the magenta-containing microcapsules have the largest film thickness, the cyan-containing microcapsules a medium film thickness and the yellow-containing microcapsules the smallest film thickness.
Claim 9
Dependent Claim
34 words
A multicolor heat transfer recording paper according to claim 3, wherein the cyan-containing microcapsules have the largest film thickness, the yellow-containing microcapsules a medium film thickness and the magenta-containing microcapsules the smallest film thickness.
Claim 10
Dependent Claim
34 words
A multicolor heat transfer recording paper according to claim 3, wherein the cyan-containing microcapsules have the largest film thickness, the magenta-containing microcapsules a medium film thickness and the yellow-containing microcapsules the smallest film thickness.
Claim 11
Dependent Claim
29 words
A multicolor heat transfer recording paper according to claim 1, wherein the ratio of the largest film thickness of microcapsules to the smallest film thickness is 20--5 to 1.
Claim 12
Dependent Claim
29 words
A multicolor heat transfer recording paper according to claim 10, wherein the ratio of the largest film thickness of microcapsules to the smallest film thickness is 15--75 to 1.
Claim 13
Dependent Claim
60 words
A multicolor heat transfer recording paper according to claim 3, wherein the microcapsules having the smallest film thickness have a film thickness of 75 to 300 Å, the microcapsules having a medium film thickness have a film thickness of 250 to 1,000 Å and the microcapsules having the largest film thickness have a film thickness of 500 to 2,000 Å.
Claim 14
Dependent Claim
48 words
A multicolor heat transfer recording paper according to claim 12, wherein the yellow-containing microcapsules have a film thickness of 75 to 300 Å, the magenta-containing microcapsules have a film thickness of 250 to 1,000 Å and the cyan-containing microcapsules have a film thickness of 500 to 2,000 Å.
Claim 15
Dependent Claim
48 words
A multicolor heat transfer recording paper according to claim 13, wherein the yellow-containing microcapsules have a film thickness of 110 to 225 Å, the magenta-containing microcapsules have a film thickness of 375 to 750 Å and the cyan-containing microcapsules have a film thickness of 750 to 1,500 Å.
Claim 16
Dependent Claim
28 words
A multicolor heat transfer recording paper according to claim 3, wherein the mixing ratio of three kinds of microcapsules is 1:0.6 to 2.4:0.75 to 3 on weight basis.
Claim 17
Dependent Claim
31 words
A multicolor heat transfer recording paper according to claim 15, wherein the mixing ratio of yellow-containing microcapsules, magenta-containing microcapsules and cyan-containing microcapsules is 1:0.6 to 2.4:0.75 to 3 on weight basis.
Claim 18
Dependent Claim
28 words
A multicolor heat transfer recording paper according to claim 16, wherein the mixing ratio of yellow-containing microcapsules, magenta-containing microcapsules and cyan-containing microcapsules is 1:0.9 to 1.8:1.1 to 2.3.
References Cited (Backward Citations)
US3317433A
Cited
US3647504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |