Patent US4444833A successfully refreshed from Google Patents.
US4444833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-transfer recording medium
Assignee: Fujifilm Business Innovation Corp
•
Filing: 1982-03-09
•
Granted: 1984-04-24
•
Expires: 2002-03-09
Abstract
Abstract A heat-transfer recording medium is described, which includes a substrate and a two color transfer layer on the substrate, wherein the two color transfer layer contains a solid heat-sensitive ink which melts or sublimates at a relatively low temperature and is transferred to a recording paper as a predetermined color, and a heat-sensitive color-forming ink dispersed in the solid heat-sensitive ink, which melts or sublimates at a relatively high temperature, and is transferred to the recording paper in a color different from the above color.
Inventors
- 👤 Haruhiko Moriguchi
- 👤 Takashi Ohmori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:33
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/34; B41M5/345; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
141 words
A heat-transfer recording medium, comprising: a substrate, and a two color transfer layer on the substrate, said two color transfer layer containing a solid heat-sensitive ink which melts or sublimates at a relatively low temperature and is transferred to a recording paper in a predetermined color, and a heat-sensitive color-forming ink dispersed in the solid heat-sensitive ink, which melts or sublimates at a relatively high temperature, and is transferred to the recording paper in a color different from said predetermined color, said color-forming ink comprising a colorless color former and a color developer wherein at least one of the color former and a color developer is encapsulated with microcapsules that melt at a relatively high temperature such that said microcapsules are transferred intact along with the melted or sublimated solid heat-sensitive ink when transfer takes place at said relatively low temperature.
Claim 2
Dependent Claim
141 words
A heat-transfer recording medium, comprising: a substrate, and a two color transfer layer on the substrate, said two color transfer layer containing a solid heat-sensitive ink which melts or sublimates at a relatively low temperature and is transferred to a recording paper in a predetermined color, and a heat-sensitive color-forming ink dispersed in the solid heat-sensitive ink, which melts or sublimates at a relatively high temperature, and is transferred to the recording paper in a color different from said predetermined color, said color-forming ink comprising a colorless color former and a color developer wherein at least one of the color former and a color developer is encapsulated with microcapsules that melt at a relatively high temperature such that said microcapsules are transferred intact along with the melted or sublimated solid heat-sensitive ink when transfer takes place at said relatively low temperature.
Claim 3
Dependent Claim
30 words
A heat-transfer recording medium as claimed in claim 1, said heat-sensitive color forming ink being dispersed throughout said solid heat-sensitive ink and being provided in the form of said microcapsules.
Claim 4
Dependent Claim
17 words
A heat-transfer recording medium as claimed in claim 2, said microcapsules being provided in two distinct types.
Claim 5
Dependent Claim
27 words
A heat-transfer recording medium as claimed in claim 3, one type of said microcapsules containing a colorless dye, and the other type of said microcapsules containing bisphenol.
Claim 6
Dependent Claim
28 words
A heat-transfer recording medium as claimed in claim 3 or 4, the contents of said two types of microcapsules reacting with one another to form said different color.
Claim 7
Dependent Claim
53 words
A heat-sensitive recording medium as claimed in claim 3 or 4, said solid heat-sensitive ink being of said predetermined color, said microcapsules also being of said predetermined color, or white, said microcapsules being transferred intact along with said melted or sublimated solid heat-sensitive ink when transfer takes place at said relatively low temperature.
Claim 8
Dependent Claim
21 words
A heat-transfer recording medium as claimed in claim 2, wherein said microcapsules contain a dye-precursor capable of forming said different color.
Claim 9
Dependent Claim
51 words
A heat-transfer recording medium as claimed in claim 7, said solid heat-sensitive ink being of said predetermined color, said microcapsules also being of said predetermined color, or white, said microcapsules being transferred intact along with said melted or sublimated solid heat-sensitive ink when transfer takes place at said relatively low temperature.
Claim 10
Dependent Claim
25 words
A heat-transfer recording medium as claimed in claim 2, wherein said microcapsules contain a colorless dye and a color former, in combination with a binder.
Claim 11
Dependent Claim
114 words
A heat-transfer recording medium, comprising: a substrate, and a transfer layer disposed on said substrate; said transfer layer containing a solid heat-sensitive ink of a first color which melts or sublimates at a first temperature and color forming means for forming a second color which melts or sublimates at a second, higher temperature, said color forming means comprising: a colorless color former and a color developer wherein at least one of the color former and a color developer is encapsulated with microcapsules that melt at a relatively high temperature such that said microcapsules are transferred intact along with the melted or sublimated solid heat-sensitive ink when transfer takes place at said relatively low temperature.
Claim 12
Dependent Claim
114 words
A heat-transfer recording medium, comprising: a substrate, and a transfer layer disposed on said substrate; said transfer layer containing a solid heat-sensitive ink of a first color which melts or sublimates at a first temperature and color forming means for forming a second color which melts or sublimates at a second, higher temperature, said color forming means comprising: a colorless color former and a color developer wherein at least one of the color former and a color developer is encapsulated with microcapsules that melt at a relatively high temperature such that said microcapsules are transferred intact along with the melted or sublimated solid heat-sensitive ink when transfer takes place at said relatively low temperature.
Claim 13
Dependent Claim
101 words
A heat-transfer recording medium comprising: a substrate, and a transfer layer disposed on said substrate; said transfer dye layer comprising solid, heat-sensitive ink of a first color in which is dispersed encapsulated color forming means for forming a secod color, said color forming means comprising: a colorless color former and a color developer wherein at least one of the color former and a color developer is encapsulated with microcapsules that melt at a relatively high temperature such that said microcapsules are transferred intact along with the melted or sublimated solid heat-sensitive ink when transfer takes place at said relatively low temperature.
Claim 14
Dependent Claim
101 words
A heat-transfer recording medium comprising: a substrate, and a transfer layer disposed on said substrate; said transfer dye layer comprising solid, heat-sensitive ink of a first color in which is dispersed encapsulated color forming means for forming a secod color, said color forming means comprising: a colorless color former and a color developer wherein at least one of the color former and a color developer is encapsulated with microcapsules that melt at a relatively high temperature such that said microcapsules are transferred intact along with the melted or sublimated solid heat-sensitive ink when transfer takes place at said relatively low temperature.
Claim 15
Dependent Claim
24 words
A heat-transfer recording medium as claimed in claim 11, said color forming means being encapsulated in white capsules or capsules of said first color.
References Cited (Backward Citations)
US4112138A
Cited
US4162165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |