EP0063000A2
Expired / Lapsed
EP
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Ink compositions and ink sheets for use in heat transfer recording
Assignee: Fujitsu Ltd
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Filing: 1982-03-30
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Granted: —
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Expires: 2002-03-30
Abstract
Abstract An ink composition for heat transfer recording comprises, as coating components a solvent dye, one or more low-melting compounds, and fine particulate material. An ink sheet has a coating of these components and is effectively reusable in a heat transfer recording process.
Inventors
- 👤 Koji Uchiyama
- 👤 Akira Nakazawa
- 👤 Masao Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 00:49
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/38207; B41M5/392; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24843; Y10T428/25; Y10T428/26
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
79 words
An ink for heat transfer recording and comprising coating components and a solvent that can be evaporated to leave a coating of the coating components and in which the coating components include a heat transferable dye that is dissolved in the solvent, characterised in that the coating components include also a particulate material that is insoluble but dispersed in the solvent and that does not melt below 100°C and a low melting component that melts at 40 to 100?C.
Claim 2
Dependent Claim
79 words
An ink for heat transfer recording and comprising coating components and a solvent that can be evaporated to leave a coating of the coating components and in which the coating components include a heat transferable dye that is dissolved in the solvent, characterised in that the coating components include also a particulate material that is insoluble but dispersed in the solvent and that does not melt below 100°C and a low melting component that melts at 40 to 100?C.
Claim 3
Dependent Claim
30 words
An ink according to claim 1 containing, by weight based on the coating components, 10 to 60% dye, 10 to 80% low melting component and 10 to 80% particulate material.
Claim 4
Dependent Claim
30 words
An ink according to claim 1 containing, by weight based on the coating components, 15 to 50% dye, 15 to 50% low melting components and 30 to 60% particulate material.
Claim 5
Dependent Claim
22 words
An ink according to any preceding claim in which the low melting component comprises a compound containing polyoxyethylene groups or hydroxyl groups.
Claim 6
Dependent Claim
27 words
An ink according to claim 1 characterised in that the low melting component comprises natural resin, polyvalent alcohol compound, ether compound or ester compound, preferably polyethylene glycol.
Claim 7
Dependent Claim
26 words
An ink according to any preceding claim characterised in that the particulate material comprises metal oxide, metal or organic resin or carbon black, preferably carbon black.
Claim 8
Dependent Claim
39 words
A heat transfer recording ink sheet comprising a substrate carrying a coating comprising a heat transferable dye characterised in that the coating is a non-adhesive coating formed of the coating components of an ink according to any preceding claim.
Claim 9
Dependent Claim
18 words
A sheet according to claim 7 characterised in that the coating has a thickness of 10 to 50}1m.
Claim 10
Dependent Claim
29 words
A sheet according to claim 7 or claim 8 in which the coating has been subjected to smoothing by application of a linear pressure of 5 to 20 kg/cm.
Claim 11
Independent Claim
53 words
A method of heat transfer recording comprising laying a transfer sheet carrying a heat transfer dye against a surface and applying localised heat and pressure and thereby transferring dye from the transfer sheet to the surface, characterised in that the transfer sheet is a sheet according to any of claims 7 to 9.
Claim 12
Dependent Claim
16 words
A method according to claim 10 characterised in that the transfer is effected by dot printing.
Claim 13
Dependent Claim
21 words
A method according to claim 10 or claim 11 characterised in-that the transfer sheet is re-used for repeated heat transfer recording.
References Cited (Backward Citations)
No citation records indexed.
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