US4800144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated type photosensitive member for electrophotography comprising a substrate of aluminate
Assignee: Minolta Co Ltd
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Filing: 1987-11-03
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Granted: 1989-01-24
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Expires: 2007-11-03
Abstract
Abstract A laminated-type photosensitive member having an aluminum substrate, and a charge generating layer comprised of an organic pigment dispersed in resin, and a charge transporting layer, the aluminum substrate is anodized to form a alumite layer which has a certain thickness, a certain crystalline/amorphous aluminum oxide molar ratio, and a certain impedance; the anodized aluminum layer is sealed; and/or an undercoat layer is formed on the anodized layer. By such arrangement it is possible to obtain a laminated-type photosensitive member excellent in properties of photosensitive members, in particular, good anti-charge injection and retification characteristics.
Inventors
- 👤 Hideaki Ueda
- 👤 Shizuo Yuge
- 👤 Katsutoshi Konishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:17
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G5/104
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
59 words
A photosensitive member having at least a charge generating layer and a charge transporting layer on an aluminum substrate, wherein the charge generating layer is an organic pigment-dispersed resin layer, the aluminium substrate comprises an alumite layer, and the alumite layer has impedance of 1˜200 KΩ and molar ratio of amorphous aluminum oxide to crystalline aluminum oxide of 50˜1500.
Claim 2
Dependent Claim
59 words
A photosensitive member having at least a charge generating layer and a charge transporting layer on an aluminum substrate, wherein the charge generating layer is an organic pigment-dispersed resin layer, the aluminium substrate comprises an alumite layer, and the alumite layer has impedance of 1˜200 KΩ and molar ratio of amorphous aluminum oxide to crystalline aluminum oxide of 50˜1500.
Claim 3
Dependent Claim
28 words
A photosensitive member of the claim 1, wherein the alumite layer comprises a barrier layer of 100˜1000Å in thickness and a porous layer of 1˜15 μm in thickness.
Claim 4
Dependent Claim
17 words
A photosensitive member of the claim 1, wherein an undercoat layer is formed on the alumite layer.
Claim 5
Dependent Claim
76 words
A photosensitive member having at least a charge generating layer and a charge transporting layer on an aluminum substrate, wherein the charge generating layer is an organic pigment-dispersed resin layer, the aluminum substrate comprises an alumite layer which is an anodized aluminum layer and subjected to a sealing treatment by the nickel acetate method, and the alumite layer has impedance of 1˜200 KΩ, and molar ratio of amorphous aluminum oxide to crystalline aluminum oxide of 50˜1500.
Claim 6
Dependent Claim
76 words
A photosensitive member having at least a charge generating layer and a charge transporting layer on an aluminum substrate, wherein the charge generating layer is an organic pigment-dispersed resin layer, the aluminum substrate comprises an alumite layer which is an anodized aluminum layer and subjected to a sealing treatment by the nickel acetate method, and the alumite layer has impedance of 1˜200 KΩ, and molar ratio of amorphous aluminum oxide to crystalline aluminum oxide of 50˜1500.
References Cited (Backward Citations)
GB1446111A
Cited
US4675089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-24 | 1992-07-25 | 1993-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-24 | 1996-07-25 | 1997-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-24 | 2000-07-25 | 2001-01-24 | $7700.00 | Window Closed / Lapsed |