US5105203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal transfer process with improved recording head life
Assignee: Canon Inc
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Filing: 1991-01-22
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Granted: 1992-04-14
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Expires: 2011-01-22
Abstract
Abstract A thermal transfer recording apparatus adapted to record an image on a recording medium by transferring a heat-transferable ink from a transfer medium to the recording medium. The apparatus has a transfer medium having on one surface a layer of a heat-transferable electroconductive ink formed on a base sheet, a recording head for heating the transfer medium in accordance with an image signal, and an electrode disposed in physical contact with the ink surface of the transfer medium so as to form a path from the electrode medium through which electric current is allowed to flow. Therefore, the apparatus prevents any path for electricity from being formed between the transfer medium and the recording head.
Inventors
- 👤 Nobuyuki Kuwabara
- 👤 Kou Hasegawa
- 👤 Hideo Sugimura
- 👤 Kazuhiro Nakajima
- 👤 Haruhiko Moriguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:20
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/315; B41J2/32; B41J2/325
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
167 words
A recording method for transferring ink from an electroconductive transfer medium to a recording medium comprising the steps of: providing a recording head having a plurality of heat generating elements for use in heating said transfer medium, said recording head generating heat in response to an image signal so as to record on said recording medium; bringing a contacting member having a resistance value by which an electric current is allowed to flow into contact with a surface of an ink layer of said transfer medium on a side opposite to a side heated by said recording head, said contacting member being electrically grounded, said contacting member being electrically grounded, said contacting member contacting said transfer medium after said transfer medium is released from a wound state and before said transfer medium is heated by said recording head; and recording onto said recording medium by heating said transfer medium while in a state allowing the electric current to flow between said contacting member and said transfer medium.
Claim 2
Dependent Claim
167 words
A recording method for transferring ink from an electroconductive transfer medium to a recording medium comprising the steps of: providing a recording head having a plurality of heat generating elements for use in heating said transfer medium, said recording head generating heat in response to an image signal so as to record on said recording medium; bringing a contacting member having a resistance value by which an electric current is allowed to flow into contact with a surface of an ink layer of said transfer medium on a side opposite to a side heated by said recording head, said contacting member being electrically grounded, said contacting member being electrically grounded, said contacting member contacting said transfer medium after said transfer medium is released from a wound state and before said transfer medium is heated by said recording head; and recording onto said recording medium by heating said transfer medium while in a state allowing the electric current to flow between said contacting member and said transfer medium.
Claim 3
Dependent Claim
23 words
A recording method according to claim 1, wherein resistance of said surface of said ink layer is not more than 10 9 Ω.
Claim 4
Dependent Claim
14 words
A recording method according to claim 1, wherein said ink is an emulsion type.
Claim 5
Dependent Claim
15 words
A recording method according to claim 1, wherein said recording head has a protective layer.
Claim 6
Dependent Claim
27 words
A recording method according to claim 1, wherein said ink layer contains an ethylene-acetic acid vinyl copolymer as a main component and carbon black as a pigment.
Claim 7
Dependent Claim
181 words
A thermal transfer recording method for transferring ink from an electroconductive transfer medium to a recording medium in response to an image signal so as to record on said recording medium, comprising the steps of: providing a recording head having a plurality of heat generating elements for use in heating said transfer medium; bringing said recording head into contact with said transfer medium, and bringing a contacting member into contact with a surface of an ink layer of said transfer medium on a side opposite to a side heated by said recording head that has a resistance low enough to allow an electric current flow, said contacting member being electrically grounded, said contacting member contacting said transfer medium after said transfer medium is released from a would state and before said transfer medium is heated by said recording head; and causing said recording head to generate heat to record in a state allowing the electric current to flow between said contacting member and said transfer medium and allowing the electric current to flow between said recording head and said transfer medium.
Claim 8
Dependent Claim
181 words
A thermal transfer recording method for transferring ink from an electroconductive transfer medium to a recording medium in response to an image signal so as to record on said recording medium, comprising the steps of: providing a recording head having a plurality of heat generating elements for use in heating said transfer medium; bringing said recording head into contact with said transfer medium, and bringing a contacting member into contact with a surface of an ink layer of said transfer medium on a side opposite to a side heated by said recording head that has a resistance low enough to allow an electric current flow, said contacting member being electrically grounded, said contacting member contacting said transfer medium after said transfer medium is released from a would state and before said transfer medium is heated by said recording head; and causing said recording head to generate heat to record in a state allowing the electric current to flow between said contacting member and said transfer medium and allowing the electric current to flow between said recording head and said transfer medium.
Claim 9
Dependent Claim
23 words
A recording method according to claim 6, wherein resistance of said surface of said ink layer is not more than 10 9 Ω.
Claim 10
Dependent Claim
14 words
A recording method according to claim 6, wherein said ink is an emulsion type.
Claim 11
Dependent Claim
27 words
A recording method according to claim 6, wherein said ink layer contains an ethylene-acetic acid vinyl copolymer as a main component and carbon black as a pigment.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-04-14 | 1995-10-14 | 1996-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-14 | 1999-10-14 | 2000-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-14 | 2003-10-14 | 2004-04-14 | $7700.00 | Window Closed / Lapsed |