Patent US4963453A successfully refreshed from Google Patents.
US4963453A
Expired / Lapsed
US
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Photosensitive members for use in electrophotography
Assignee: Individual
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Filing: 1989-02-08
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Granted: 1990-10-16
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Expires: 2009-02-08
Abstract
Abstract A photosensitive member for use in electrophotography in manufactured by preparing a coating material by mixing together a powder of photosensitive material, for example α or ε phthalocyanine, and a binder of a self-hardening type resin, for example a polyester resin, applying the coating material on the surface of a hollow metal cylinder to form a photosensitive layer, smoothing the surface of the photosensitive layer by applying a mechanical force, and hardening the photosensitive layer by heat or ultraviolet ray.
Inventors
- 👤 Koichi Kinoshita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:38
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0525
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
60 words
A photosensitive member for use in electrophotography comprising: an electroconductive substrate; a photosensitive layer comprising a photoconductive material on said substrate; said photosensitive layer comprising a mixture of a binder of a self-hardening type resin and a finely divided powder of a photoconductive material; said photosensitive layer having a mirror finish with a surface irregularity of less than 0.1 μ.
Claim 2
Dependent Claim
60 words
A photosensitive member for use in electrophotography comprising: an electroconductive substrate; a photosensitive layer comprising a photoconductive material on said substrate; said photosensitive layer comprising a mixture of a binder of a self-hardening type resin and a finely divided powder of a photoconductive material; said photosensitive layer having a mirror finish with a surface irregularity of less than 0.1 μ.
Claim 3
Dependent Claim
18 words
The photosensitive member according to claim 1 wherein said electroconductive substrate takes the form of a metal cylinder.
Claim 4
Dependent Claim
31 words
The photosensitive member according to claim 1 wherein said photosensitive material is selected from the group consisting of α phthalocyanine, ε phthalocyanine, a mixture thereof, CdS, CdSe, ZnO, ZnS and PbO.
Claim 5
Dependent Claim
28 words
The photosensitive member according to claim 1 wherein said self-hardening type resin is selected from the group consisting of polyester, epoxy, melamine and acryl resins, and mixtures thereof.
Claim 6
Dependent Claim
23 words
The photosensitive member according to claim 4 wherein said self-hardening type resin hardens when heated, irradiated with ultraviolet ray or dried in air.
Claim 7
Dependent Claim
14 words
The photosensitive member according to claim 1 wherein said substrate is cylindrical in shape
Claim 8
Dependent Claim
14 words
The photosensitive member according to claim 1 wherein said photoconductive material is a phthalocyanine.
Claim 9
Dependent Claim
25 words
The photosensitive member according to claim 1 wherein said photosensitive layer has a surface hardness of at least about 6H in terms of pencil hardness.
Claim 10
Dependent Claim
15 words
The photosensitive member according to claim 1 wherein said photoconductive material comprises a pulverized powder.
Claim 11
Independent Claim
75 words
A method of manufacturing a photosensitive member for use in electrophotography, comprising the steps of: preparing a coating material by mixing together a powder of photoconductive material and a binder of a self-hardening type resin; applying said coating material onto a surface of an electroconductive substrate to form a photosensitive layer; hardening said photosensitive layer; and thereafter mechanically smoothing said photosensitive layer to a mirror finish having a surface irregularity of less than 0.1 μ.
Claim 12
Independent Claim
75 words
A method of manufacturing a photosensitive member for use in electrophotography, comprising the steps of: preparing a coating material by mixing together a powder of photoconductive material and a binder of a self-hardening type resin; applying said coating material onto a surface of an electroconductive substrate to form a photosensitive layer; hardening said photosensitive layer; and thereafter mechanically smoothing said photosensitive layer to a mirror finish having a surface irregularity of less than 0.1 μ.
Claim 13
Dependent Claim
13 words
The method according to claim 10 wherein said photoconductive material is a phthalocyanine.
Claim 14
Dependent Claim
16 words
The method according to claim 10 wherein said mechanical smoothing step is performed at room temperature.
Claim 15
Dependent Claim
22 words
The method according to claim 10 wherein said mechanical smoothing step comprises pulverizing said powder of photoconductive material in said photosensitive layer.
Claim 16
Dependent Claim
32 words
The method according to claim 10 wherein said substrate is cylindrical in shape and wherein said mechanical smoothing step comprises applying mechanical pressure to said photosensitive layer while rotating said cylindrical substrate.
Claim 17
Dependent Claim
24 words
The method according to claim 10 wherein said photosensitive layer has a surface hardness of at least about 6H in terms of pencil hardness.
Claim 18
Dependent Claim
35 words
The method according to claim 10 wherein said substrate is a hollow metal cylinder and said hollow metal cylinder formed with said photosensitive layer is interposed between a pair of rollers which are pressed together.
Claim 19
Dependent Claim
34 words
The method according to claim 16 wherein one of said rollers is urged against the other roller by a fluid pressure piston-cylinder assembly and moved away from said other roller by returning spring means.
Claim 20
Dependent Claim
30 words
The method according to claim 19 wherein said photosensitive material is selected from the group consisting of α phthalocyanine, ε phthalocyanine, a mixture thereof, CdS, CdSe, ZnO, ZnS and PbO.
Claim 21
Dependent Claim
27 words
The method according to claim 10 wherein said self-hardening type resin is selected from the group consisting of polyester, epoxy, melamine and acryl resins and mixtures thereof.
Claim 22
Dependent Claim
23 words
The method according to claim 10 wherein said self-hardening type resin hardens when heated or irradiated with ultraviolet ray or dried in air.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-15 | 1994-04-16 | 1994-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-15 | 1998-04-16 | 1998-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-15 | 2002-04-16 | 2002-10-16 | $7700.00 | Window Closed / Lapsed |