US3992091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roughened imaging surface for cleaning
Assignee: Xerox Corp
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Filing: 1974-09-16
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Granted: 1976-11-16
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Expires: 1994-09-16
Abstract
Abstract Cleaning imaging material from a xerographic imaging surface with a cleaning blade with reduced friction between the blade and the surface is provided without image degredation by an appropriately roughened surface, which roughness is formed on the photoconductive surface by substrate preetching to provide a final or post coated roughness pattern of 3 to 5 microns and less than 20 microns.
Inventors
- 👤 Donald J. Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:20
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0011; G03G21/0029
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
103 words
In an electrostatographic image reproducing apparatus including a selenium material imaging surface developable with toner material, and further including a cleaning blade for deformably engaging said imaging surface to remove such toner material therefrom, the improvement in said apparatus wherein said imaging surface has a substantially uniformly and continuously roughened surface with a surface roughness pattern averaging 3 to 5 microns in lateral dimensions, but not substantially exceeding 20 microns in lateral dimensions and 2 microns in depth, said roughness pattern reducing friction between said cleaning blade and said imaging surface in comparison to a smooth imaging surface without adversely affecting image reproduction.
Claim 2
Dependent Claim
103 words
In an electrostatographic image reproducing apparatus including a selenium material imaging surface developable with toner material, and further including a cleaning blade for deformably engaging said imaging surface to remove such toner material therefrom, the improvement in said apparatus wherein said imaging surface has a substantially uniformly and continuously roughened surface with a surface roughness pattern averaging 3 to 5 microns in lateral dimensions, but not substantially exceeding 20 microns in lateral dimensions and 2 microns in depth, said roughness pattern reducing friction between said cleaning blade and said imaging surface in comparison to a smooth imaging surface without adversely affecting image reproduction.
Claim 3
Dependent Claim
37 words
The electrostatographic image reproducing apparatus of claim 1, wherein said roughened imaging surface comprises an etched conductive metal substrate etched with said surface roughness pattern and overcoated with a thin uniform layer of said selenium photoelectric material.
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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) | 1979-11-16 | 1980-05-17 | 1980-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-16 | 1984-05-17 | 1984-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-16 | 1988-05-17 | 1988-11-16 | $7700.00 | Window Closed / Lapsed |