US4250375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal recording head
Assignee: Toshiba Corp
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Filing: 1979-06-06
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Granted: 1981-02-10
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Expires: 1999-06-06
Abstract
Abstract A thermal recording head which comprises a plurality of heat-generating resistors; an insulation substrate on which a plurality of separate conductors are mounted to be connected to the heat-generating resistors directly or with diodes interposed therebetween; and a 3-ply conductor holder formed of an insulation sheet, an assembly of common conductors mounted on the insulation sheet at a prescribed interval and an insulation layer deposited on the common conductors with a thickness of 2 to 20 microns, and wherein the insulation layer has openings arranged at a prescribed interval; and the insulation substrate is laminated with the conductor holder with the common conductors connected to the separate conductors.
Inventors
- 👤 Tadashi Tsutsumi
- 👤 Mamoru Mizuguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:52
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/315; B41J2/32; B41J2/335; B41J2/33505; B41J2/3351; B41J2/33525; B41J2/3355; B41J2/33555; B41J2/3357; B41J2/33595
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
127 words
A thermal recording head which comprises an insulation substrate; a plurality of heat-generating resistors formed on the insulation substrate; a plurality of separate conductors mounted on the insulation substrate in a state respectively connected to the resistors connected in series with respective diodes; and a conductor holder for supporting common conductor connected to the separate conductors, and wherein the conductor holder includes an insulation sheet, common conductors mounted on the insulation sheet in a state separated from each other at a prescribed interval, and an insulation layer deposited on the common conductors and provided with openings; said insulation sheet included in the conductor holder having windows aligned with the openings of the insulation layer; and the common conductors are connected to the separate conductor through the openings.
Claim 2
Dependent Claim
127 words
A thermal recording head which comprises an insulation substrate; a plurality of heat-generating resistors formed on the insulation substrate; a plurality of separate conductors mounted on the insulation substrate in a state respectively connected to the resistors connected in series with respective diodes; and a conductor holder for supporting common conductor connected to the separate conductors, and wherein the conductor holder includes an insulation sheet, common conductors mounted on the insulation sheet in a state separated from each other at a prescribed interval, and an insulation layer deposited on the common conductors and provided with openings; said insulation sheet included in the conductor holder having windows aligned with the openings of the insulation layer; and the common conductors are connected to the separate conductor through the openings.
Claim 3
Dependent Claim
21 words
The thermal recording head according to claim 1, wherein the insulation layer has a thickness ranging between 2 and 20 microns.
Claim 4
Dependent Claim
30 words
The thermal recording head according to claim 2, wherein the insulation layer is prepared from a material selected from the group consisting of melamine resin, epoxy resin and polyimide resin.
Claim 5
Dependent Claim
24 words
The thermal recording head according to claim 1, wherein the insulation sheet included in the conductor holder has a greater thickness than 50 microns.
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) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |