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 00:25
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)
US3624619A
Cited
GB1331942A
Cited
US3798370A
Cited
US4079194A
Cited
JPS53149055A
Cited
US4220815A
Cited
US4220815B1
Cited
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 |