US4236163A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal recording stylus
Assignee: Graphtec Corp
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Filing: 1979-09-28
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Granted: 1980-11-25
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Expires: 1999-09-28
Abstract
Abstract A thermal recording stylus has a recording head made of Type IIa diamond. The type IIa diamond has a very good heat conductivity and an excellent abrasion-resistant property. Therefore, the thermal recording stylus with the recording head made of Type IIa diamond has an improved thermal response character, a higher resolution in drawing a line, and a longer life.
Inventors
- 👤 Kinzo Iino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:33
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
100 words
A thermal recording stylus comprising: a supporting member having an end coated with a heat insulating layer; an abrasion-resistant layer formed above said heat insulating layer for making up a space between said heat insulating layer and said abrasion-resistant layer; an electric heater provided in said space between said heat insulating layer and said abrasion-resistant layer; and a recording head made of Type IIa diamond, having one end protruded from said abrasion-resistant layer, and having a portion embraced in said space between said heat insulating layer and said abrasion-resistant layer to make a heat conductive contact with said electric heater.
Claim 2
Dependent Claim
100 words
A thermal recording stylus comprising: a supporting member having an end coated with a heat insulating layer; an abrasion-resistant layer formed above said heat insulating layer for making up a space between said heat insulating layer and said abrasion-resistant layer; an electric heater provided in said space between said heat insulating layer and said abrasion-resistant layer; and a recording head made of Type IIa diamond, having one end protruded from said abrasion-resistant layer, and having a portion embraced in said space between said heat insulating layer and said abrasion-resistant layer to make a heat conductive contact with said electric heater.
Claim 3
Dependent Claim
31 words
A thermal recording stylus in accordance with claim 1 wherein said recording head made of Type IIa diamond have a portion embedded in the heat generating substance of said electric heater.
Claim 4
Dependent Claim
48 words
A thermal recording stylus in accordance with claim 1 wherein said recording head made of Type IIa diamond have a portion in which the surface of the other end of said recording head is in contact with the surface of the heat generating substance of said electric heater.
Claim 5
Dependent Claim
40 words
A thermal recording stylus in accordance with claim 1 wherein said recording head made of Type IIa diamond has a cylindrical surface on which the heat generating substance of said electric heater is formed by printing or by evaporation coating.
Claim 6
Dependent Claim
40 words
A thermal recording stylus in accordance with claim 1 wherein said recording head made of Type IIa diamond has a flat surface on which the heat generating substance of said electric heater is formed by printing or by evaporation coating.
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) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |