US4923846A
Expired / Lapsed
US
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Heat transfer sheet for color image formation
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1987-04-30
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Granted: 1990-05-08
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Expires: 2007-04-30
Abstract
Abstract The present invention relates to a heat transfer sheet for color image formation comprising dye carrying layers (2a, 2b, 2c) formed on a substrate sheet (1) and respectively having hues of cyan, magenta and yellow. The characteristic feature of this heat transfer sheet resides in a combination of the dye carrying layers with the respective hues having the following color characteristics as evaluated according to the Graphic Arts Technical Foundation: cyan--a hue error of from 10 to 45% and a turbidity of 35% or less or a hue error of from 45 to 60% and a turbidity of 20% or less; magenta--a hue error of from 10 to 35% and a turbidity of 25% or less or a hue error of from 35 to 60% and a turbidity of 10% or less; and yellow--a hue error of 10% or less and a turbidity of 10% or less.
Inventors
- 👤 Masaki Kutsukake
- 👤 Jumpei Kanto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:27
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/385; B41M5/3858; B41M5/34; B41M5/345; B41M5/3852; B41M5/3854; B41M5/388; B41M5/39; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
233 words
A heat transfer sheet for color image formation comprising respective dye carrying layers containing dyes with respective hues of cyan, magenta and yellow formed on a substrate sheet, characterized in that said respective dye carrying layers each contain one kind or plural kinds of dyes, and the color characteristics of said respective dye carrying layers satisfy the following conditions as the color characteristics (based on GATF) in a state of having been transferred on an image receiving sheet: cyan: hue error is in the range of from 10% on the green side to 60% on the blue side, and turbidity is 35% or less in the range of hue error from 10% on the green side to 45% on the blue side and is 20% or less in the range of hue error from 45% to 60% on the blue side; magenta: hue error is in the range of from 10% on the blue side to 60% on the red side, and turbidity is 25% or less in the range of hue error from 10% on the blue side to 35% on the red side and is 10% or less in the range of hue error from 35% to 60% on the red side; yellow: hue error is in the range of from 10% on the red side to 10% on the green side, and turbidity in this range is 10% or less.
Claim 2
Dependent Claim
233 words
A heat transfer sheet for color image formation comprising respective dye carrying layers containing dyes with respective hues of cyan, magenta and yellow formed on a substrate sheet, characterized in that said respective dye carrying layers each contain one kind or plural kinds of dyes, and the color characteristics of said respective dye carrying layers satisfy the following conditions as the color characteristics (based on GATF) in a state of having been transferred on an image receiving sheet: cyan: hue error is in the range of from 10% on the green side to 60% on the blue side, and turbidity is 35% or less in the range of hue error from 10% on the green side to 45% on the blue side and is 20% or less in the range of hue error from 45% to 60% on the blue side; magenta: hue error is in the range of from 10% on the blue side to 60% on the red side, and turbidity is 25% or less in the range of hue error from 10% on the blue side to 35% on the red side and is 10% or less in the range of hue error from 35% to 60% on the red side; yellow: hue error is in the range of from 10% on the red side to 10% on the green side, and turbidity in this range is 10% or less.
Claim 3
Dependent Claim
41 words
A heat transfer sheet according to claim 1, wherein the hue error of cyan is in the range of from 5% or more and 30% or less on the blue side, and the turbidity in this range is 25% or less.
Claim 4
Dependent Claim
40 words
A heat transfer sheet according to claim 1, wherein the hue error of magenta is in the range of 15% or more and 35% or less on the red side, and the turbidity in this range is 15% or less.
Claim 5
Dependent Claim
42 words
A heat transfer sheet according to claim 1, wherein the hue error of yellow is in the range of within 5% on the red side and within 5% on the green side, and the turbidity in this range is 10% or less.
Claim 6
Dependent Claim
37 words
A heat transfer sheet according to claim 1, wherein the substrate sheet comprises one sheet, and the respective dye carrying layers of three colors are formed in any desired order on one surface on said substrate sheet.
Claim 7
Dependent Claim
24 words
A heat transfer sheet according to claim 1, wherein the dyes contained in the dye carrying layers each comprise a single kind of dye.
Claim 8
Dependent Claim
35 words
A heat transfer sheet according to claim 1, wherein the dyes contained in the dye carrying layers comprise a composite system of dyes of plural kinds in at least one of cyan, magenta or yellow.
Claim 9
Dependent Claim
27 words
A heat transfer sheet according to claim 1, wherein the inorganic/organic value (I/O value) of the dye contained in the dye carrying layer is 2.30 or less.
Claim 10
Dependent Claim
32 words
A heat transfer sheet according to claim 1, wherein the dye contained in the dye carrying layer has a molecular weight of 280 or more in all of cyan, magenta and yellow.
Claim 11
Dependent Claim
32 words
A heat transfer sheet according to claim 1, wherein the dye contained in the dye carrying layer has a molecular weight of 300 or more in all of cyan, magenta and yellow.
Claim 12
Dependent Claim
32 words
A heat transfer sheet according to claim 1, wherein the dye contained in the dye carrying layer has a molecular weight of 350 or more in all of cyan, magenta and yellow.
Claim 13
Dependent Claim
26 words
A heat transfer sheet according to claim 1, wherein the dye contained in the dye carrying layer has a melting point of 250° C. or lower.
Claim 14
Dependent Claim
26 words
A heat transfer sheet according to claim 1, wherein the dye contained in the dye carrying layer has a melting point of 80° to 200° C.
Claim 15
Dependent Claim
17 words
A heat transfer sheet according to claim 1, wherein a black dye carrying layer is further provided.
Claim 16
Dependent Claim
260 words
A heat transfer sheet for color image formation comprising respective dye carrying layers containing dyes with respective hues of cyan, magenta and yellow formed on a substrate sheet, wherein the inorganic/organic value (I/O value) of the dye is 2.30 or less, the dyes contained in the dye carrying layers have molecular weights of 280 or more and wherein said respective dye carrying layers each contain one kind or plural kinds of dyes, and the color characteristics of said respective dye carrying layers satisfy the following conditions as the color characteristics (based on GATF) in a state of having been transferred on an image receiving sheet: cyan: hue error is in the range of from 10% on the green side to 60% on the blue side, and turbidity is 35% or less in the range of hue error from 10% on the green side to 45% on the blue side and is 20% or less in the range of hue error from 45% to 60% on the blue side; magenta: hue error is in the range of from 10% on the blue side to 60% on the red side, and turbidity is 25% or less in the range of hue error from 10% on the blue side to 35% on the red side and is 10% or less in the range of hue error from 35% to 60% on the red side; yellow: hue error is in the range of from 10% on the red side to 10% on the green side, and turbidity in this range is 10% or less.
Claim 17
Dependent Claim
260 words
A heat transfer sheet for color image formation comprising respective dye carrying layers containing dyes with respective hues of cyan, magenta and yellow formed on a substrate sheet, wherein the inorganic/organic value (I/O value) of the dye is 2.30 or less, the dyes contained in the dye carrying layers have molecular weights of 280 or more and wherein said respective dye carrying layers each contain one kind or plural kinds of dyes, and the color characteristics of said respective dye carrying layers satisfy the following conditions as the color characteristics (based on GATF) in a state of having been transferred on an image receiving sheet: cyan: hue error is in the range of from 10% on the green side to 60% on the blue side, and turbidity is 35% or less in the range of hue error from 10% on the green side to 45% on the blue side and is 20% or less in the range of hue error from 45% to 60% on the blue side; magenta: hue error is in the range of from 10% on the blue side to 60% on the red side, and turbidity is 25% or less in the range of hue error from 10% on the blue side to 35% on the red side and is 10% or less in the range of hue error from 35% to 60% on the red side; yellow: hue error is in the range of from 10% on the red side to 10% on the green side, and turbidity in this range is 10% or less.
References Cited (Backward Citations)
US4700207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |