Patent US4121260A successfully refreshed from Google Patents.
US4121260A
Expired / Lapsed
US
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Transceiver system for visible images
Assignee: Xerox Corp
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Filing: 1977-04-04
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Granted: 1978-10-17
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Expires: 1997-04-04
Abstract
Abstract A transceiver system is provided which selectively applies electrical potentials representative of graphical information to a stylus scanning a layer of electrochromic material thereby causing selective coloration of the materials.
Inventors
- 👤 Malcolm Stuart Dye
- 👤 Michael James Redman
- 👤 David W. Satchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:26
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/024; H04N1/028; H04N1/21; H04N1/2104; H04N1/2108; H04N1/23
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
122 words
A transceiver system for graphical information comprising a recording sheet having at least a layer of an electrochromic material, a conductive support platen for said recording sheet, and a stylus array comprising a plurality of styli for scanning the sheet supported on the platen, the stylus array and the platen being mounted for relative movement, the system including receive means for selectively applying electrical potentials to individual ones of said styli during scanning so as to cause selective coloration of the electrochromic material in accordance with received electrical signals representing incoming graphical information, and transmit means, responsive to electrical potentials corresponding to outgoing graphical information and detected by individual ones of said styli, for transmitting electrical signals representing said outgoing graphical information.
Claim 2
Dependent Claim
122 words
A transceiver system for graphical information comprising a recording sheet having at least a layer of an electrochromic material, a conductive support platen for said recording sheet, and a stylus array comprising a plurality of styli for scanning the sheet supported on the platen, the stylus array and the platen being mounted for relative movement, the system including receive means for selectively applying electrical potentials to individual ones of said styli during scanning so as to cause selective coloration of the electrochromic material in accordance with received electrical signals representing incoming graphical information, and transmit means, responsive to electrical potentials corresponding to outgoing graphical information and detected by individual ones of said styli, for transmitting electrical signals representing said outgoing graphical information.
Claim 3
Dependent Claim
43 words
The transceiver system of claim 1 wherein said outgoing graphical information is in the form of selective coloration in an electrochromic material in a recording sheet having at least a layer of the electrochromic material, the styli detecting potentials corresponding to the coloration.
Claim 4
Dependent Claim
55 words
The transceiver system of claim 1 wherein said outgoing graphical information is on a non-electrochromic material, the system including a photoconductor sheet between the outgoing graphical information and the styli, and the outgoing graphical information being illuminated, whereby the styli are responsive to photocurrents in the photoconductor sheet which correspond with the outgoing graphical information.
Claim 5
Dependent Claim
25 words
The transceiver system of claim 1 wherein said platen is a stationary platen, and said stylus array is mounted for scanning movement over said sheet.
References Cited (Backward Citations)
US3769629A
Cited
US3943528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |