Patent US3943528A successfully refreshed from Google Patents.
US3943528A
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Method for producing an image using persistent electrochromic materials
Assignee: Xerox Corp
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Filing: 1974-04-25
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Granted: 1976-03-09
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Expires: 1994-04-25
Abstract
Abstract Disclosed is an imaging method useful in facsimile transmission. The method involves passing an electrical current through a receiving member of a solid state persistent electrochromic material uniformly distributed on the surface of a substrate. The substrate comprises a surface material on a ground plane. The surface material is a material which becomes more conductive upon being heated or wetted and is returned to its original state of resistivity upon cooling or drying. The surface material is heated or wetted to increase its conductivity and thereby reduce its resistance to a level less than or about equal to that of the electrochromic material whereupon an electrical current is passed through the electrochromic material in imagewise configuration to thereby form an image. Upon formation of the image, it is fixed by cooling or drying the surface material.
Inventors
- 👤 Don L. Camphausen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:35
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/20; H; H04; H04N; H04N1/00; H04N1/23
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
156 words
An imaging method which comprises: a. providing a receiving member comprised of a solid state persistent electrochromic material uniformly distributed upon a substrate of a surface material which has a resistivity substantially greater than the electrochromic material on a ground plane; said surface material being a material which becomes more conductive upon being heated and is returned to its original state of resistance by cooling, b. treating the surface material by heating it to increase its conductivity and thereby reduce its resistance to a level less than or about equal to that of the electrochromic material; c. passing an electrical current through the electrochromic material by creating a potential between a movable electrode and the ground plane and moving the electrode in imagewise configuration to thereby form an image in the electrochromic material; and d. converting the surface material back to its original state of resistance greater than that of the electrochromic material by cooling it.
Claim 2
Dependent Claim
156 words
An imaging method which comprises: a. providing a receiving member comprised of a solid state persistent electrochromic material uniformly distributed upon a substrate of a surface material which has a resistivity substantially greater than the electrochromic material on a ground plane; said surface material being a material which becomes more conductive upon being heated and is returned to its original state of resistance by cooling, b. treating the surface material by heating it to increase its conductivity and thereby reduce its resistance to a level less than or about equal to that of the electrochromic material; c. passing an electrical current through the electrochromic material by creating a potential between a movable electrode and the ground plane and moving the electrode in imagewise configuration to thereby form an image in the electrochromic material; and d. converting the surface material back to its original state of resistance greater than that of the electrochromic material by cooling it.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein the persistent electrochromic material is an alkali metal halide.
Claim 4
Dependent Claim
20 words
The method of claim 2 wherein the alkali metal halide is NaCl, RbCl, KCl, LiF, NaBr, KBr, KI or RbBr.
Claim 5
Dependent Claim
56 words
The method of claim 1 wherein the persistent electrochromic material is an oxide, sulfide, oxysulfide, halide, selenide, telluride, arsenide, phosphide, nitride, chromate, molybdate, tungstate, vanodate, niobate, tantalate, titanate, stannate, zirconate or manganate of a cation selected from group IB, IIB, IIIB, IVB, VB, VIB, VIII, IIIA, IVA, VA or the Lanthanide series of the periodic table.
Claim 6
Dependent Claim
32 words
The method of claim 4 wherein the persistent electrochromic material is an oxide or sulfide of a cation selected from group IB, IVA, VA or the Lanthanide series of the periodic table.
Claim 7
Dependent Claim
67 words
The method of claim 4 wherein the persistent electrochromic material is WO 3 , MoO 3 , CuO, CuMoO 4 , CuWO 4 .sup.. 2H 2 O, CuS, Cu 3 O 4 , CuWO 4 , Co 2 S 3 , CoS, MoS 3 , MoWO 4 , MoS 2 , SnS, TiS 2 , TiO, VO, NiO, CeO 2 , Ce 2 S 3 or SnSe.
Claim 8
Dependent Claim
25 words
The method of claim 1 wherein the persistent electrochromic material is distributed on the substrate to a thickness of from 100 A to 20,000 A.
Claim 9
Dependent Claim
15 words
The method of claim 7 wherein the thickness is from 500 A to 10,000 A.
Claim 10
Dependent Claim
35 words
The method of claim 1 wherein the movable electrode is a metal stylus and the current is provided by creating a potential between the treated substrate and the stylus such that the stylus is negative.
Claim 11
Dependent Claim
158 words
An imaging method which comprises: a. providing a receiving member comprised of a solid state persistent electrochromic material uniformly distributed upon a substrate of a surface material which has a resistivity substantially greater than the electrochromic material on a ground plane; said surface material being a paper which becomes more conductive upon being wetted and is capable of returning to its original state of resistance by drying; b. treating the surface material by wetting it to increase its conductivity and thereby reduce its resistance to a level less than or about equal to that of the electrochromic material; c. passing an electrical current through the electrochromic material by creating a potential between a movable electrode and the ground plane and moving the electrode in imagewise configuration to thereby form an image in the electrochromic material; and d. converting the surface material back to its original state of resistance greater than that of the electrochromic material by drying it.
Claim 12
Dependent Claim
158 words
An imaging method which comprises: a. providing a receiving member comprised of a solid state persistent electrochromic material uniformly distributed upon a substrate of a surface material which has a resistivity substantially greater than the electrochromic material on a ground plane; said surface material being a paper which becomes more conductive upon being wetted and is capable of returning to its original state of resistance by drying; b. treating the surface material by wetting it to increase its conductivity and thereby reduce its resistance to a level less than or about equal to that of the electrochromic material; c. passing an electrical current through the electrochromic material by creating a potential between a movable electrode and the ground plane and moving the electrode in imagewise configuration to thereby form an image in the electrochromic material; and d. converting the surface material back to its original state of resistance greater than that of the electrochromic material by drying it.
Claim 13
Dependent Claim
12 words
The method of claim 10 wherein the paper is wetted with water.
Claim 14
Dependent Claim
15 words
The method of claim 10 wherein the persistent electrochromic material is an alkali metal halide.
Claim 15
Dependent Claim
20 words
The method of claim 12 wherein the alkali metal halide is NaCl, RbCl, KCl, LiF, NaBr, KBr, KI or RbBr.
Claim 16
Dependent Claim
56 words
The method of claim 10 wherein the persistent electrochromic material is an oxide, sulfide, oxysulfide, halide, selenide, telluride, arsenide, phosphide, nitride, chromate, molybdate, tungstate, vanodate, niobate, tantalate, titanate, stannate, zirconate or manganate of a cation selected from group IB, IIB, IIIB, IVB, VB, VIB, VIII, IIIA, IVA, VA or the Lanthanide series of the periodic table.
Claim 17
Dependent Claim
32 words
The method of claim 14 wherein the persistent electrochromic material is an oxide or sulfide of a cation selected from group IB, IVA, VA or the Lanthanide series of the periodic table.
Claim 18
Dependent Claim
68 words
The method of claim 14 wherein the persistent electrochromic material is WO 3 , MoO 3 , CuO, CuMoO 4 , CuWO 4 .sup.. 2H 2 O, CuS, Cu 3 O 4 , CuWO 4 , Co 2 S 3 , CoS, MoS 3 , MoWO 4 , MoS 2 , SnS, TiS 2 , TiO, VO, NiO, CeO 2 , Ce 2 S 3 , or SnSe.
Claim 19
Dependent Claim
25 words
The method of claim 10 wherein the persistent electrochromic material is distributed on the substrate to a thickness of from 100 A to 20,000 A.
Claim 20
Dependent Claim
15 words
The method of claim 17 wherein the thickness is from 500 A to 10,000 A.
Claim 21
Dependent Claim
35 words
The method of claim 10 wherein the movable electrode is a metal stylus and the current is provided by creating a potential between the treated substrate and the stylus such that the stylus is negative.
References Cited (Backward Citations)
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US3521941A
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US3795011A
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US3654095A
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US3747119A
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US3818492A
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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) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |