US4661393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink compositions and ink sheets for use in heat transfer recording
Assignee: Fujitsu Ltd
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Filing: 1985-10-03
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Granted: 1987-04-28
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Expires: 2005-10-03
Abstract
Abstract An improved ink composition is disclosed which comprises, in addition to a solvent dye, one or more low-melting compounds, containing hydroxyl and/or ethylene oxide, and inorganic or organic fine particles. An ink sheet comprising such ink composition is also disclosed. The ink sheet is effectively reusable in a heat transfer recording process.
Inventors
- 👤 Koji Uchiyama
- 👤 Akira Nakazawa
- 👤 Masao Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:06
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: 14
Claim 1
Independent Claim
91 words
A heat transfer recording ink sheet which comprises a substrate having formed thereon a layer of ink composition, said ink composition consisting of: a transfer component of a solvent dye and at least one low-melting compound having a melting point in the range from 40° to 100° C. and containing at least one of hydroxyl and ethylene oxide; and at least one inorganic or organic fine powder having a particle size in the range from 0.01 to 200 μm, each said fine powder being insoluble and dispersible in an organic solvent.
Claim 2
Dependent Claim
91 words
A heat transfer recording ink sheet which comprises a substrate having formed thereon a layer of ink composition, said ink composition consisting of: a transfer component of a solvent dye and at least one low-melting compound having a melting point in the range from 40° to 100° C. and containing at least one of hydroxyl and ethylene oxide; and at least one inorganic or organic fine powder having a particle size in the range from 0.01 to 200 μm, each said fine powder being insoluble and dispersible in an organic solvent.
Claim 3
Dependent Claim
25 words
An ink sheet as in claim 1, in which the solvent dye is an anthraquinone dye, azo dye, direct dye, acid dye, or basic dye.
Claim 4
Dependent Claim
27 words
An ink sheet in claim 1, in which each said low-melting compound is a natural resin, a polyvalent alcohol compound, an ether compound, or an ester compound.
Claim 5
Dependent Claim
26 words
An ink sheet as in claim 1, in which each said fine powder is of a metal oxide, a metal, an organic compound, or carbon black.
Claim 6
Dependent Claim
24 words
An ink sheet as in claim 1, in which the ink composition layer has a thickness in the range from 10 to 50 μm.
Claim 7
Dependent Claim
32 words
An ink sheet as inclaim 1, in which a surface of the ink composition layer is subjected to a smoothing treatment under application of a linear pressure of 5 to 20 kg/cm.
Claim 8
Dependent Claim
44 words
The ink sheet of claim 1 wherein space between particles of said fine powder is filled by said transfer component, and said transfer component is capable of moving through said space between said particles of said fine powder when said low-melting compound is melted.
Claim 9
Dependent Claim
27 words
The ink sheet of claim 7, wherein said fine powder is in the range of from 10 to 80% of the total weight of the ink composition.
Claim 10
Dependent Claim
25 words
The ink sheet of claim 8, said fine powder being in the range from 30 to 60% of the total weight of the ink composition.
Claim 11
Dependent Claim
26 words
The ink sheet of claim 7, wherein said low-melting compound is in the range from 5 to 95% o the total weight of the ink composition.
Claim 12
Dependent Claim
26 words
The ink sheet of claim 10, wherein said low-melting compound is in the range from 40 to 90% of the total weight of said ink composition.
Claim 13
Dependent Claim
15 words
The ink sheet of claim 1, wherein said dye is dissolved in said low-melting compound.
Claim 14
Dependent Claim
22 words
The ink sheet of claim 8, wherein said low-melting compound is at least 5% of the total weight of said ink composition.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-27 | 1990-10-27 | 1991-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-27 | 1994-10-27 | 1995-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-27 | 1998-10-27 | 1999-04-28 | $7700.00 | Window Closed / Lapsed |