Patent US4904557A successfully refreshed from Google Patents.
US4904557A
Expired / Lapsed
US
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Electrophotographic photosensitive member having a roughened surface
Assignee: Canon Inc
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Filing: 1988-10-05
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Granted: 1990-02-27
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Expires: 2008-10-05
Abstract
Abstract An electrophotographic photosensitive member comprises a photosensitive layer on a conductive substrate having a smooth surface, wherein said photosensitive layer has a surface roughness, represented by an average roughness Rz of ten points over a reference length of 2.5 mm, is equal to or larger than 1/2 of the wavelength of the light source employed for image formation.
Inventors
- 👤 Keiji Kubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:41
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; Y; Y10; Y10S; Y10S430/00; Y10S430/146; Y10S430/151
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
58 words
An electrophotographic photosensitive member comprising a photosensitive layer on a conductive substrate having a smooth surface, wherein said photosensitive layer has a surface roughness, represented by an average roughness Rz of ten points over a reference length of 2.5 mm, is equal to or larger than 1/2 of the wavelength of the light source employed for image formation.
Claim 2
Dependent Claim
58 words
An electrophotographic photosensitive member comprising a photosensitive layer on a conductive substrate having a smooth surface, wherein said photosensitive layer has a surface roughness, represented by an average roughness Rz of ten points over a reference length of 2.5 mm, is equal to or larger than 1/2 of the wavelength of the light source employed for image formation.
Claim 3
Dependent Claim
24 words
An electrophotographic photosensitive member according to claim 1, comprising a charge generation layer and a charge transport layer laminated on said charge generation layer.
Claim 4
Dependent Claim
24 words
An electrophotographic photosensitive member according to claim 1, comprising a charge transport layer and a charge generation layer laminated on said charge transport layer.
Claim 5
Dependent Claim
18 words
An electrophotographic photosensitive member according to claim 1, comprising a charge generating material in a charge transport layer.
Claim 6
Dependent Claim
17 words
An electrophotographic photosensitive member according to claim 1, wherein the photosensitive layer is formed by spray coating.
Claim 7
Dependent Claim
22 words
An electrophotographic photosensitive member according to claim 1, wherein the surface roughness of said photosensitive layer is not more than 1.5 μm.
Claim 8
Dependent Claim
21 words
An electrophotographic apparatus according to claim 1, wherein the surface roughness of said photosensitive layer is not more than 1.5 μm.
Claim 9
Dependent Claim
16 words
An electrophotographic apparatus according to claim 1, wherein the photosensitive layer is formed by spray coating.
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) | 1993-02-26 | 1993-08-28 | 1994-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-26 | 1997-08-28 | 1998-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-26 | 2001-08-28 | 2002-02-27 | $7700.00 | Window Closed / Lapsed |