US4518669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic photosensitive member
Assignee: Canon Inc
•
Filing: 1983-10-31
•
Granted: 1985-05-21
•
Expires: 2003-10-31
Abstract
Abstract An electrophotographic photosensitive member provided with a novel intermediate layer between the substrate and the photosensitive layer. This intermediate layer is a resin layer in which an alumina- or tin oxide-treated titanium oxide powder is dispersed. The thickness of this intermediate layer is the second power or more of the maximum surface roughness of the substrate when the length is denoted in terms of a micron as a unit.
Inventors
- 👤 Yuichi Yashiki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:31
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; G03G5/144
Claims Analysis
Total Claims: 62
Claim 1
Independent Claim
44 words
An electrophotographic photosensitive member having an intermediate layer between a substrate and a photosensitive layer, characterized in that the intermediate layer comprises a titanium oxide powder having a coating comprising aluminum oxide or tin oxide on the titanium oxide powder particle and a binder.
Claim 2
Dependent Claim
44 words
An electrophotographic photosensitive member having an intermediate layer between a substrate and a photosensitive layer, characterized in that the intermediate layer comprises a titanium oxide powder having a coating comprising aluminum oxide or tin oxide on the titanium oxide powder particle and a binder.
Claim 3
Dependent Claim
15 words
The electrophotographic photosensitive member of claim 1, wherein the titanium oxide is of rutile type.
Claim 4
Dependent Claim
31 words
The electrophotographic photosensitive member of claim 1, wherein the intermediate layer contains a titanium oxide powder coated with alumina and a titanium oxide powder coated with tin oxide, and a binder.
Claim 5
Dependent Claim
20 words
The electrophotographic photosensitive member of claim 1, which has a resin layer between the intermediate layer and the photosensitive layer.
Claim 6
Dependent Claim
64 words
The electrophotographic photosensitive member of claim 4, wherein the resin layer is a coat comprising at least one resin selected from the group consisting of poly(vinyl alcohol), poly(vinyl methyl ether), poly(vinyl ethyl ether), polyvinylpyridine, polyvinylpyrrolidone, poly(ethylene oxide), poly(acrylic acid), methyl cellulose, ethyl cellulose, poly(glutamic acid), casein, gelatin, starch, polyamides, phenolic resins, poly(vinyl formal), polyurethane elastomers, alkyd resins, ethylene-vinyl acetate copolymers, and vinylpyrrolidone-vinyl acetate copolymers.
Claim 7
Dependent Claim
15 words
The electrophotographic photosensitive member of claim 5, wherein the resin layer is a polyamide coat.
Claim 8
Dependent Claim
17 words
The electrophotographic photosensitive member of claim 6, wherein the polyamide is a nylon or a nylon copolymer.
Claim 9
Dependent Claim
16 words
The electrophotographic photosensitive member of claim 4, wherein the resin layer has a thickness of 0.3-2μ.
Claim 10
Dependent Claim
24 words
The electrophotographic photosensitive member of claim 1, wherein the photosensitive layer is a lamination of a charge generation layer and a charge transport layer.
Claim 11
Dependent Claim
49 words
An electrophotographic photosensitive member for laser beam printers which has an intermediate layer between the substrate and the photosensitive layer, characterized in that the intermediate layer comprises a titanium oxide powder having a coat comprising aluminum oxide or tin oxide on the titanium oxide powder particle, and a binder.
Claim 12
Dependent Claim
49 words
An electrophotographic photosensitive member for laser beam printers which has an intermediate layer between the substrate and the photosensitive layer, characterized in that the intermediate layer comprises a titanium oxide powder having a coat comprising aluminum oxide or tin oxide on the titanium oxide powder particle, and a binder.
Claim 13
Dependent Claim
19 words
The electrophotographic photosensitive member for laser beam printers of claim 10, wherein the titanium oxide is of rutile type.
Claim 14
Dependent Claim
35 words
The electrophotographic photosensitive member for laser beam printers of claim 10, wherein the intermediate layer contains a titanium oxide powder coated with alumina and a titanium oxide powder coated with tin oxide, and a binder.
Claim 15
Dependent Claim
24 words
The electrophotographic photosensitive member for laser beam printers of claim 10, which has a resin layer between the intermediate layer and the photosensitive layer.
Claim 16
Dependent Claim
68 words
The electrophotographic photosensitive member for laser beam printers of claim 13, wherein the resin layer is a coat comprising at least one resin selected from the group consisting of poly(vinyl alcohol), poly(vinyl methyl ether), poly(vinyl ethyl ether), polyvinylpyridine, polyvinylpyrrolidone, poly(ethylene oxide), poly(acrylic acid), methyl cellulose, ethyl cellulose, poly(glutamic acid), casein, gelatin, starch, polyamides, phenolic resins, poly(vinyl formal), polyurethane elastomers, alkyd resins, ethylene-vinyl acetate copolymers, and vinylpyrrolidone-vinyl acetate copolymers.
Claim 17
Dependent Claim
19 words
The electrophotographic photosensitive member for laser beam printers of claim 14, wherein the resin layer is a polyamide coat.
Claim 18
Dependent Claim
21 words
The electrophotographic photosensitive member for laser beam printers of claim 10, wherein the polyamide is a nylon or a nylon copolymer.
Claim 19
Dependent Claim
20 words
The electrophotographic photosensitive member for laser beam printers of claim 13, wherein the resin layer has a thickness of 0.3-2μ.
Claim 20
Dependent Claim
28 words
The electrophotographic photosensitive member for laser beam printers of claim 10, wherein the photosensitive layer is a lamination of a charge generation layer and a charge transport layer.
Claim 21
Dependent Claim
38 words
An electrophotographic photosensitive member having an intermediate layer between the substrate and the photosensitive layer, characterized in that the intermediate layer is a resin layer in which a titanium oxide powder and a tin oxide powder are dispersed.
Claim 22
Dependent Claim
38 words
An electrophotographic photosensitive member having an intermediate layer between the substrate and the photosensitive layer, characterized in that the intermediate layer is a resin layer in which a titanium oxide powder and a tin oxide powder are dispersed.
Claim 23
Dependent Claim
15 words
The electrophotographic photosensitive member of claim 19, wherein the titanium oxide is of rutile type.
Claim 24
Dependent Claim
15 words
The electrophotographic photosensitive member of claim 19, wherein the titanium oxide powder has been surface-treated.
Claim 25
Dependent Claim
22 words
The electrophotographic photosensitive member of claim 21, wherein the surface treatment is to form an alumina coat on the titanium oxide particle.
Claim 26
Dependent Claim
22 words
The electrophotographic photosensitive member of claim 21, wherein the surface treatment is to form a tin oxide coat on the titanium particle.
Claim 27
Dependent Claim
33 words
The electrophotographic photosensitive member of claim 19, wherein the titanium oxide is contained in an amount of 0.1-10 parts by weight per 1 part by weight of the resin in the intermediate layer.
Claim 28
Dependent Claim
33 words
The electrophotographic photosensitive member of claim 24, wherein the titanium oxide is contained in an amount of 0.5-5 parts by weight per 1 part by weight of the resin in the intermediate layer.
Claim 29
Dependent Claim
25 words
The electrophotographic photosensitive member of claim 19, wherein the weight ratio of the titanium oxide to the tin oxide, in the intermediate layer, is 1:1-10:1.
Claim 30
Dependent Claim
21 words
The electrophotographic photosensitive member of claim 19 which has a second resin layer between the intermediate layer and the photosensitive layer.
Claim 31
Dependent Claim
24 words
The electrophotographic photosensitive member of claim 19, wherein the photosensitive layer is a lamination of a charge generation layer and a charge transport layer.
Claim 32
Dependent Claim
54 words
An electrophotographic photosensitive member having an intermediate layer between a substrate and a photosensitive layer, characterized in that the intermediate layer is a resin layer in which a titanium oxide powder having a coat comprising aluminum oxide or tin oxide on the titanium oxide powder particle, and a surface-untreated titanium oxide powder are dispersed.
Claim 33
Dependent Claim
54 words
An electrophotographic photosensitive member having an intermediate layer between a substrate and a photosensitive layer, characterized in that the intermediate layer is a resin layer in which a titanium oxide powder having a coat comprising aluminum oxide or tin oxide on the titanium oxide powder particle, and a surface-untreated titanium oxide powder are dispersed.
Claim 34
Dependent Claim
30 words
The electrophotographic photosensitive member of claim 29 wherein the titanium oxide powder with an aluminum oxide coating or a tin oxide coating on the powder particles is of rutile type.
Claim 35
Dependent Claim
17 words
The electrophotographic photosensitive member of claim 29, wherein the surface-untreated titanium oxide powder is of rutile type.
Claim 36
Dependent Claim
20 words
The electrophotographic photosensitive member of claim 29, which has a resin layer between the intermediate layer and the photosensitive layer.
Claim 37
Dependent Claim
64 words
The electrophotographic photosensitive member of claim 32, wherein the resin layer is a coat comprising at least one resin selected from the group consisting of poly(vinyl alcohol), poly(vinyl methyl ether), poly(vinyl ethyl ether), polyvinylpyridine, polyvinylpyrrolidone, poly(ethylene oxide), poly(acrylic acid), methyl cellulose, ethyl cellulose, poly(glutamic acid), casein, gelatin, starch, polyamide, phenolic resin, poly(vinyl formal), polyurethane elastomer, alkyd resin, ethylene-vinyl acetate copolymer, and vinylpyrrolidone-vinyl acetate copolymer.
Claim 38
Dependent Claim
15 words
The electrophotographic photosensitive member of claim 33, wherein the resin layer is a polyamide coat.
Claim 39
Dependent Claim
17 words
The electrophotographic photosensitive member of claim 34, wherein the polyamide is a nylon or a nylon copolymer.
Claim 40
Dependent Claim
16 words
The electrophotographic photosensitive member of claim 32, wherein the resin layer has a thickness of 0.3-2μ.
Claim 41
Dependent Claim
24 words
The electrophotographic photosensitive member of claim 29, wherein the photosensitive layer is a lamination of a charge generation layer and a charge transport layer.
Claim 42
Dependent Claim
107 words
An electrophotographic photosensitive member having an intermediate layer between an electroconductive metal substrate and a photosensitive layer, characterized in that the metal substrate has a maximum surface roughness of at least 1, the intermediate layer comprises a first intermediate layer having a low electroconductive substance dispersed in a resin provided on the surface of the substrate and a second layer constituted of a resin provided on the first intermediate layer, and the first intermediate layer has a layer thickness of the second power or more of the maximum surface roughness of the metal substrate when the length is denoted in terms of a micron as a unit.
Claim 43
Dependent Claim
107 words
An electrophotographic photosensitive member having an intermediate layer between an electroconductive metal substrate and a photosensitive layer, characterized in that the metal substrate has a maximum surface roughness of at least 1, the intermediate layer comprises a first intermediate layer having a low electroconductive substance dispersed in a resin provided on the surface of the substrate and a second layer constituted of a resin provided on the first intermediate layer, and the first intermediate layer has a layer thickness of the second power or more of the maximum surface roughness of the metal substrate when the length is denoted in terms of a micron as a unit.
Claim 44
Dependent Claim
18 words
The electrophotographic photosensitive member of claim 38, wherein the substrate is a metal plate or a metal cylinder.
Claim 45
Dependent Claim
19 words
The electrophotographic photosensitive member of claim 39, wherein the metal plate or the metal cylinder is made of aluminum.
Claim 46
Dependent Claim
68 words
The electrophotographic photosensitive member of claim 38, wherein the first intermediate layer is a coat comprising a low resistivity material and one resin selected from the group consisting of poly(vinyl alcohol), poly(vinyl methyl ether), poly(vinyl ethyl ether), polyvinylpyridine, polyvinylpyrrolidone, poly(ethylene oxide), poly(acrylic acid), methyl cellulose, ethyl cellulose, poly(glutamic acid), casein, gelatin, starch, polyamides, phenolic resins, poly(vinyl formal), polyurethane elastomers, alkyd resins, ethylene-vinyl acetate copolymers, and vinylpyrrolidone-vinyl acetate copolymers.
Claim 47
Dependent Claim
16 words
The electrophotographic photosensitive member of claim 41, wherein the first intermediate layer is a polyamide coat.
Claim 48
Dependent Claim
17 words
The electrophotographic photosensitive member of claim 42, wherein the polyamide is a nylon or a nylon copolymer.
Claim 49
Dependent Claim
17 words
The electrophotographic photosensitive member of claim 41, wherein the first intermediate layer is a poly(vinyl alcohol) coat.
Claim 50
Dependent Claim
21 words
The electrophotographic photosensitive member of claim 38, wherein the low resistivity material is a metal powder or a metal oxide powder.
Claim 51
Dependent Claim
38 words
The electrophotographic photosensitive member of claim 45, wherein the low resistivity material is the powder of at least one metal selected from the group consisting of aluminum, nickel, copper, silver, gold, zinc, tin, titanium, lead, indium and carbon.
Claim 52
Dependent Claim
30 words
The electrophotographic photosensitive member of claim 45, wherein the metal oxide powder is at least one member selected from the group consisting of titanium oxide powder and tin oxide powder.
Claim 53
Dependent Claim
15 words
The electrophotographic photosensitive member of claim 45, wherein the low resistivity material is carbon powder
Claim 54
Dependent Claim
16 words
The electrophotographic photosensitive member of claim 47, wherein the titanium oxide powder is a surface-treated one.
Claim 55
Dependent Claim
22 words
The electrophotographic photosensitive member of claim 49, wherein the surface treatment is to form an alumina coat on the titanium oxide particle.
Claim 56
Dependent Claim
23 words
The electrophotographic photosensitive member of claim 49, wherein the surface treatment is to form a tin oxide coat on the titanium oxide particle.
Claim 57
Dependent Claim
15 words
The electrophotographic photosensitive member of claim 47, wherein the titanium oxide is of rutile type.
Claim 58
Dependent Claim
65 words
The electrophotographic photosensitive member of claim 41, wherein the second resin layer is a coat comprising at least one resin selected from the group consisting of poly(vinyl alcohol), poly(vinyl methyl ether), poly(vinyl ethyl ether), polyvinylpyridine, polyvinylpyrrolidone, poly(ethylene oxide), poly(acrylic acid), methyl cellulose, ethyl cellulose, poly(glutamic acid), casein, gelatin, starch, polyamides, phenolic resins, poly(vinyl formal), polyurethane elastomers, alkyd resins, ethylene-vinyl acetate copolymers, and vinylpyrrolidone-vinyl acetate copolymers.
Claim 59
Dependent Claim
15 words
The electrophotographic photosensitive member of claim 38, wherein the resin layer is a polyamide coat.
Claim 60
Dependent Claim
17 words
The electrophotographic photosensitive member of claim 54, wherein the polyamide is a nylon or a nylon copolymer.
Claim 61
Dependent Claim
17 words
The electrophotographic photosensitive member of claim 53, wherein the second resin layer has a thickness of 0.3-2μ.
Claim 62
Dependent Claim
24 words
The electrophotographic photosensitive member of claim 38, wherein the photosensitive layer is a lamination of a charge generation layer and a charge transport layer.
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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) | 1988-05-20 | 1988-11-19 | 1989-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-20 | 1992-11-19 | 1993-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-20 | 1996-11-19 | 1997-05-21 | $7700.00 | Window Closed / Lapsed |