US4827289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal head
Assignee: Mitsubishi Electric Corp
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Filing: 1988-06-23
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Granted: 1989-05-02
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Expires: 2008-06-23
Abstract
Abstract A thermal head for a printer in accordance with the present invention comprises: a substrate (11); a heater layer (12) on the substrate; lead wires (13a and 13b) formed on the heater layer for supplying electric power to the heater layer; and a single protective layer (20) for protecting the heater layer and the lead wires by covering them, the protective layer including an oxide or a nitride.
Inventors
- 👤 Shiro Tsuji
- 👤 Eizo Naya
- 👤 Takashi Yamanaka
- 👤 Yoshihiro Usui
- 👤 Hiroshi Ito
- 👤 Noriyuki Hasebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:09
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/315; B41J2/32; B41J2/335; B41J2/33505; B41J2/3353; B41J2/3355; B41J2/33555; B41J2/3357; B41J2/345; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12583; Y10T428/1259
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
57 words
A thermal head for a printer comprising: a substrate; a heater layer on said substrate, said heater layer comprising Mn-SiO 2 ; lead wires connected to said heater layer for supplying electric power thereto; and a single protective layer for protecting said heater layer and said lead wires, said protective layer comprising Y 2 O 3 .
Claim 2
Dependent Claim
57 words
A thermal head for a printer comprising: a substrate; a heater layer on said substrate, said heater layer comprising Mn-SiO 2 ; lead wires connected to said heater layer for supplying electric power thereto; and a single protective layer for protecting said heater layer and said lead wires, said protective layer comprising Y 2 O 3 .
Claim 3
Dependent Claim
53 words
A thermal head for a printer comprising: a substrate; a heater layer on said substrate, said heater layer comprising Mn-SiO 2 ; lead wires connected to said heater layer for supplying electric power thereto; and a single protective layer for protecting said heater layer and said lead wires, said protective layer comprising HfN.
Claim 4
Dependent Claim
53 words
A thermal head for a printer comprising: a substrate; a heater layer on said substrate, said heater layer comprising Mn-SiO 2 ; lead wires connected to said heater layer for supplying electric power thereto; and a single protective layer for protecting said heater layer and said lead wires, said protective layer comprising HfN.
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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) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |