Patent US4475008A successfully refreshed from Google Patents.
US4475008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coordinate input device with pressure-sensitive rubber sheet
Assignee: Toshiba Corp
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Filing: 1982-08-13
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Granted: 1984-10-02
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Expires: 2002-08-13
Abstract
Abstract In a coordinate input device which comprises a resistance plate and a pressure-sensitive rubber sheet placed on the resistance plate so that DC voltage is alternately applied to the resistance plates in the X-axis direction and Y-axis direction of the resistance plate, a surface electrode plate is placed on the pressure-sensitive rubber sheet. The surface electrode plate has a soft synthetic resin plate and a metallic electrode layer formed on the surface of the synthetic resin plate, and the metallic electrode layer is so placed on the pressure-sensitive rubber sheet as to contact the pressure-sensitive rubber sheet.
Inventors
- 👤 Miwako Doi
- 👤 Mitsuo Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:45
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/045
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
79 words
A coordinate input device comprising: a resistance plate; a pressure-sensitive rubber sheet placed on said resistance plate; and a surface electrode plate having a soft synthetic resin plate; a hard resin plate having one surface placed on said soft synthetic resin plate; and said hard resin plate having another surface on which is formed a metallic electrode layer, said surface electrode plate being placed on said rubber sheet such that said metallic electrode layer contacts said pressure-sensitive rubber sheet.
Claim 2
Dependent Claim
79 words
A coordinate input device comprising: a resistance plate; a pressure-sensitive rubber sheet placed on said resistance plate; and a surface electrode plate having a soft synthetic resin plate; a hard resin plate having one surface placed on said soft synthetic resin plate; and said hard resin plate having another surface on which is formed a metallic electrode layer, said surface electrode plate being placed on said rubber sheet such that said metallic electrode layer contacts said pressure-sensitive rubber sheet.
Claim 3
Dependent Claim
24 words
A coordinate input device according to claim 1, wherein said resistance plate comprises an insulating substrate and a resistance layer formed on said substrate.
Claim 4
Dependent Claim
21 words
A coordinate input device according to claim 1, wherein said soft synthetic resin plate is formed of soft vinyl chloride resin.
Claim 5
Dependent Claim
18 words
A coordinate input device according to claim 1, wherein said soft synthetic resin is formed of polyurethane resin.
Claim 6
Dependent Claim
17 words
A coordinate input device according to claim 1, wherein said metallic electrode layer is formed of copper.
Claim 7
Dependent Claim
17 words
A coordinate input device according to claim 1, wherein said metallic electrode layer is formed of nickel.
Claim 8
Dependent Claim
17 words
A coordinate input device according to claim 1, wherein said metallic electrode layer is formed of tin.
Claim 9
Dependent Claim
15 words
A coordinate input device according to claim 1, wherein said metallic electrode layer has slits.
References Cited (Backward Citations)
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GB1331942A
Cited
US3798370A
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US4079194A
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JPS53149055A
Cited
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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) | 1987-10-02 | 1988-04-02 | 1988-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-02 | 1992-04-02 | 1992-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-02 | 1996-04-02 | 1996-10-02 | $7700.00 | Window Closed / Lapsed |