US4492745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive member for electrophotography with mirror finished support
Assignee: Olympus Corp
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Filing: 1983-10-31
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Granted: 1985-01-08
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Expires: 2003-10-31
Abstract
Abstract A photosensitive member for electrophotography basically comprises a conductive support, on the surface of which a photoconductive layer and a transparent insulating layer are sequentially laminated. The photosensitive member is adapted to be used in a process for forming an electrostatic latent image including sequential steps of a primary corona charging concurrent with imagewise exposure, a secondary corona charging and a flush irradiation. The surface of the conductive support is treated to a mirror finish, based on experimental finding that the contrast voltage of the latent image depends on the degree of surface roughness of the support.
Inventors
- 👤 Yoshiyuki Mimura
- 👤 Takao Okada
- 👤 Akitoshi Toda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:45
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G5/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
81 words
A photosensitive member for electrophotography for use in a process of forming an electrostatic latent image by sequential steps of a primary corona charging concurrent with imagewise exposure, a secondary corona charging and a flush irradiation; comprising: a conductive support having its surface treated to a mirror finish, the surface roughness of said surface being no greater than 0.1 S; a photoconductive layer laminated on the surface of the conductive support; and a transparent insulating layer laminated on the photoconductive layer.
Claim 2
Dependent Claim
81 words
A photosensitive member for electrophotography for use in a process of forming an electrostatic latent image by sequential steps of a primary corona charging concurrent with imagewise exposure, a secondary corona charging and a flush irradiation; comprising: a conductive support having its surface treated to a mirror finish, the surface roughness of said surface being no greater than 0.1 S; a photoconductive layer laminated on the surface of the conductive support; and a transparent insulating layer laminated on the photoconductive layer.
Claim 3
Independent Claim
75 words
A method for producing a photosensitive member for use in electrophotographic copiers and the like on which member an enhanced latent image is formed, said method comprising the steps of: providing a conductive member and finishing one major surface of said conductive member to provide a mirror-finish surface having a surface roughness no greater than 0.1 S; forming a photoconductive layer upon said mirror finish surface; and forming an insulating layer upon said photoconductive layer.
Claim 4
Independent Claim
75 words
A method for producing a photosensitive member for use in electrophotographic copiers and the like on which member an enhanced latent image is formed, said method comprising the steps of: providing a conductive member and finishing one major surface of said conductive member to provide a mirror-finish surface having a surface roughness no greater than 0.1 S; forming a photoconductive layer upon said mirror finish surface; and forming an insulating layer upon said photoconductive layer.
References Cited (Backward Citations)
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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) | 1988-01-08 | 1988-07-09 | 1989-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-08 | 1992-07-09 | 1993-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-08 | 1996-07-09 | 1997-01-08 | $7700.00 | Window Closed / Lapsed |