US4702979A
Expired / Lapsed
US
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Method of forming image
Assignee: Ricoh Co Ltd
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Filing: 1986-07-24
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Granted: 1987-10-27
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Expires: 2006-07-24
Abstract
Abstract This invention relates to a method of forming an image, characterized by applying voltage on a photosensitive material having a photoconductive layer and an electroconductive layer on a substrate in such a manner as to make said electroconductive layer positive and said photoconductive layer negative while irradiating optical information on said positive electroconductive layer or said negative photoconductive layer, thereby causing an anodic ion reaction on the interface between said electroconductive layer and said photoconductive layer to selectively change the spectral absorption properties of at least one of said electroconductive layer and said photoconductive layer depending on the irradiated optical information; said photosensitive material comprising an electroconductive layer of metal as a simple substance, its alloy or its metal compound applied on a substrate and a photoconductive layer overlaid on said electroconductive layer.
Inventors
- 👤 Satoshi Otomura
- 👤 Narihito Kojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:44
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/04; G03G13/22
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
168 words
A method of forming an image, which comprises applying voltage on a photosensitive material comprising an electroconductive cathode layer in contact with a photoconductive layer consisting essentially of a charge-generating organic pigment and a metallic electroconductive anode layer comprising at least one metal selected from the group consisting of Al, Ta, V, Nb, Zr, Ti, Si, Pb, W, Mg, Zn, Cd, Ni, Co and Fe, on a substrate in such a manner as to make said electroconductive anode layer positive and said photoconductive layer negative and simultaneously irradiating optical information on said positive electroconductive anode layer or said negative photoconductive layer, thereby causing an anodic ion reaction on the interface between said electroconductive anode layer and said photoconductive layer to selectively change the spectral absorption properties of at least one of said electroconductive anode layer and said photoconductive layer depending on the irradiated optical information; said photosensitive material comprising said metallic electroconductive anode layer applied on said substrate and said photoconductive layer overlaid on said electroconductive anode layer.
Claim 2
Independent Claim
168 words
A method of forming an image, which comprises applying voltage on a photosensitive material comprising an electroconductive cathode layer in contact with a photoconductive layer consisting essentially of a charge-generating organic pigment and a metallic electroconductive anode layer comprising at least one metal selected from the group consisting of Al, Ta, V, Nb, Zr, Ti, Si, Pb, W, Mg, Zn, Cd, Ni, Co and Fe, on a substrate in such a manner as to make said electroconductive anode layer positive and said photoconductive layer negative and simultaneously irradiating optical information on said positive electroconductive anode layer or said negative photoconductive layer, thereby causing an anodic ion reaction on the interface between said electroconductive anode layer and said photoconductive layer to selectively change the spectral absorption properties of at least one of said electroconductive anode layer and said photoconductive layer depending on the irradiated optical information; said photosensitive material comprising said metallic electroconductive anode layer applied on said substrate and said photoconductive layer overlaid on said electroconductive anode layer.
Claim 3
Independent Claim
190 words
A method of forming an image, which comprises applying voltage on a photosensitive material comprising an electroconductive cathode layer in contact with a photoconductive layer, said photoconductive layer comprising a charge-generating layer and a charge-transfer layer laminated in that order on said electroconductive layer, said charge-generating layer consisting essentially of a charge-generating organic pigment, and a metallic electroconductive anode layer comprising at least one metal selected from the group consisting of Al, Ta, V, Nb, Zr, Ti, Si, Pb, W, Mg, Zn, Cd, Ni, Co and Fe, on a substrate in such a manner as to make said electroconductive anode layer positive and said photoconductive layer negative and simultaneously irradiating optical information on said positive electroconductive anode layer or said negative photoconductive layer, thereby causing an anodic ion reaction on the interface between said electroconductive anode layer and said photoconductive layer to selectively change the spectral absorption properties of at least one of said electroconductive anode layer and said photoconductive layer depending on the irradiated optical information; said photosensitive material comprising said metallic electroconductive anode layer applied on said substrate and said photoconductive layer overlaid on said electroconductive anode layer.
Claim 4
Independent Claim
190 words
A method of forming an image, which comprises applying voltage on a photosensitive material comprising an electroconductive cathode layer in contact with a photoconductive layer, said photoconductive layer comprising a charge-generating layer and a charge-transfer layer laminated in that order on said electroconductive layer, said charge-generating layer consisting essentially of a charge-generating organic pigment, and a metallic electroconductive anode layer comprising at least one metal selected from the group consisting of Al, Ta, V, Nb, Zr, Ti, Si, Pb, W, Mg, Zn, Cd, Ni, Co and Fe, on a substrate in such a manner as to make said electroconductive anode layer positive and said photoconductive layer negative and simultaneously irradiating optical information on said positive electroconductive anode layer or said negative photoconductive layer, thereby causing an anodic ion reaction on the interface between said electroconductive anode layer and said photoconductive layer to selectively change the spectral absorption properties of at least one of said electroconductive anode layer and said photoconductive layer depending on the irradiated optical information; said photosensitive material comprising said metallic electroconductive anode layer applied on said substrate and said photoconductive layer overlaid on said electroconductive anode layer.
Claim 5
Dependent Claim
15 words
The method according to claim 2, wherein said charge generating layer comprises an azo pigment.
Claim 6
Dependent Claim
92 words
The method according to claim 3, wherein said azo pigment has the general formula, ##STR32## wherein A is ##STR33## wherein X is benzene, substituted benzene, naphthalene, substituted naphthalene, indole, substituted indole, carbazole, substituted carbazole, benzofuran or substituted benzofuran; Ar 1 is benzene, substituted benzene, naphthalene, substituted naphthalene, carbazole, substituted carbazole, dibenzofuran or substituted dibenzofuran; Ar 2 and Ar 3 respectively are benzene, substituted benzene, naphthalene or substituted naphthalene; R 1 and R 3 respectively is hydrogen, lower alkyl, phenyl or substituted phenyl; and R 2 is lower alkyl, carboxyl or substituted carboxyl.
Claim 7
Dependent Claim
92 words
The method according to claim 3, wherein said azo pigment has the general formula, ##STR34## wherein A is ##STR35## wherein X is benzene, substituted benzene, naphthalene, substituted naphthalene, indole, substituted indole, carbazole, substituted carbazole, benzofuran or substituted benzofuran; Ar 1 is benzene, substituted benzene, naphthalene substituted naphthalene, carbazole, substituted carbazole, dibenzofuran or substituted dibenzofuran; Ar 2 and Ar 3 respectively are benzene, substituted benzene, naphthalene or substituted naphthalene; R 1 and R 3 respectively are hydrogen, lower alkyl, phenyl or substituted phenyl; and R 2 is lower alkyl, carboxyl or substituted carboxyl.
Claim 8
Dependent Claim
92 words
The method according to claim 3, wherein said azo pigment has the general formula, ##STR36## wherein A is ##STR37## wherein X is benzene, substituted benzene, naphthalene, substituted naphthalene, indole, substituted indole, carbazole, substituted carbazole, benzofuran or substituted benzofuran; Ar 1 is benzene, substituted benzene, naphthalene, substituted naphthalene, carbazole, substituted carbazole, dibenzofuran or substituted dibenzofuran; Ar 2 and Ar 3 respectively are benzene, substituted benzene, naphthalene or substituted naphthalene; R 1 and R 2 respectively are hydrogen, lower alkyl, phenyl or substituted phenyl; and R 2 is lower alkyl, carboxyl or substituted carboxyl.
Claim 9
Dependent Claim
92 words
The method according to claim 3, wherein said azo pigment has the general formula, ##STR38## wherein A is ##STR39## wherein X is benzene, substituted benzene, naphthalene, substituted naphthalene, indole, substituted indole, carbazole, substituted carbazole, benzofuran or substituted benzofuran; Ar 1 is benzene, substituted benzene, naphthalene substituted naphthalene, carbazole, substituted carbazole, dibenzofuran or substituted dibenzofuran; Ar 2 and Ar 3 respectively are benzene, substituted benzene, naphthalene or substituted naphthalene; R 1 and R 3 respectively are hydrogen, lower alkyl, phenyl or substituted phenyl; and R 2 is lower alkyl, carboxyl or substituted carboxyl.
Claim 10
Dependent Claim
18 words
The method according to claim 2, wherein said charge transfer layer comprises a styryl compound dissolved in resin.
Claim 11
Dependent Claim
18 words
The method according to claim 2, wherein said charge transfer layer comprises a hydrazone compound dissolved in resin.
Claim 12
Dependent Claim
18 words
The method according to claim 2, wherein said charge transfer layer comprises an oxadiazole compound dissolved in resin.
Claim 13
Dependent Claim
19 words
The method according to claim 2, wherein said charge transfer layer comprises a diphenyl methane compound dissolved in resin.
Claim 14
Dependent Claim
18 words
The method according to claim 2, wherein said charge transfer layer comprises a pyrazoline compound dissolved in resin.
Claim 15
Independent Claim
120 words
A method of forming a visible image, consisting essentially of: imagewise exposing to light a photosensitive material consisting essentially of the following layers in face-to-face contact with each other in the following order, a substrate layer, an electroconductive metal anode layer on said substrate layer, said electroconductive metal anode layer consisting essentially of at least one metal selected from the group consisting of Al, Ta, V, Nb, Zr, Ti, Si, Pb, W, Mg, Zn, Cd, Ni, Co and Fe, said metal undergoing anodic oxidation when subjected to a continuously flowing photocurrent, a photoconductive layer on said electroconductive metal anode layer, said photoconductive layer consisting essentially of a charge generating organic pigment, and an electroconduct cathode layer on said photoconductive layer;
Claim 16
Independent Claim
120 words
A method of forming a visible image, consisting essentially of: imagewise exposing to light a photosensitive material consisting essentially of the following layers in face-to-face contact with each other in the following order, a substrate layer, an electroconductive metal anode layer on said substrate layer, said electroconductive metal anode layer consisting essentially of at least one metal selected from the group consisting of Al, Ta, V, Nb, Zr, Ti, Si, Pb, W, Mg, Zn, Cd, Ni, Co and Fe, said metal undergoing anodic oxidation when subjected to a continuously flowing photocurrent, a photoconductive layer on said electroconductive metal anode layer, said photoconductive layer consisting essentially of a charge generating organic pigment, and an electroconduct cathode layer on said photoconductive layer;
Claim 17
Dependent Claim
102 words
simultaneously externally applying a voltage across said photosensitive material so that said electroconductive metal anode layer is an anode, said electroconductive cathode layer is a cathode, and said photoconductive layer is electrically negative relative to said electroconductive metal anode layer, said imagewise exposing step also generating photocurrents in the illuminated areas of said photoconductive layer and thereby causing an anodic oxidation reaction on the interface between said electroconductive metal anode layer and said photoconductive layer to selectively change the spectral absorption properties of at least one of said electroconductive metal anode layer and said photoconductive layer and thereby form said visible image.
Claim 18
Dependent Claim
102 words
simultaneously externally applying a voltage across said photosensitive material so that said electroconductive metal anode layer is an anode, said electroconductive cathode layer is a cathode, and said photoconductive layer is electrically negative relative to said electroconductive metal anode layer, said imagewise exposing step also generating photocurrents in the illuminated areas of said photoconductive layer and thereby causing an anodic oxidation reaction on the interface between said electroconductive metal anode layer and said photoconductive layer to selectively change the spectral absorption properties of at least one of said electroconductive metal anode layer and said photoconductive layer and thereby form said visible image.
Claim 19
Dependent Claim
52 words
A method as claimed in claim 1 in which the opposite faces of said photoconductive layer are in face-to-face contact with said metallic electroconductive anode layer and said electrocondutive cathode layer, and said voltage is applied across said metallic electroconductive layer, as an anode, and said electroconductive cathode layer as a cathode.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-10-26 | 1991-04-27 | 1991-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-26 | 1995-04-27 | 1995-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-26 | 1999-04-27 | 1999-10-27 | $7700.00 | Window Closed / Lapsed |