US4091145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support for electrophotographic sensitive plate
Assignee: Ricoh Co Ltd
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Filing: 1976-01-19
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Granted: 1978-05-23
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Expires: 1996-01-19
Abstract
Abstract A support for use in electrophotographic sensitive plates which is superior in durability as well as half-tone reproducibility as photosensitive material and is prepared by forming a barrier layer on practically the whole surface of a conductive base plate by burying fine particles of metal oxide therein.
Inventors
- 👤 Katutoshi Endo
- 👤 Makoto Ohira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:30
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G5/104; G03G5/102; G03G5/14; G03G5/142; G03G5/144; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/24; Y10T428/24479; Y10T428/24612; Y10T428/24802; Y10T428/25; Y10T428/256; Y10T428/257; Y10T428/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
A support for electrophotographic sensitive plate consisting of a metal substrate having directly embedded in its surface fine metal oxide particles having a particle diameter in the range of from 100 to 8000 mesh, said metal oxide being a member selected from the group consisting of oxides of aluminum, titanium, chromium, zirconium, silicon, zinc, iron and magnesium, said particles forming a barrier layer consisting essentially of said particles firmly embedded in and attached to said surface of said substrate and distributed substantially uniformly over substantially the entire surface area thereof, said barrier layer being discontinuous and being dotted by microscopic uncovered portions of said surface of said metal substrate.
Claim 2
Dependent Claim
109 words
A support for electrophotographic sensitive plate consisting of a metal substrate having directly embedded in its surface fine metal oxide particles having a particle diameter in the range of from 100 to 8000 mesh, said metal oxide being a member selected from the group consisting of oxides of aluminum, titanium, chromium, zirconium, silicon, zinc, iron and magnesium, said particles forming a barrier layer consisting essentially of said particles firmly embedded in and attached to said surface of said substrate and distributed substantially uniformly over substantially the entire surface area thereof, said barrier layer being discontinuous and being dotted by microscopic uncovered portions of said surface of said metal substrate.
Claim 3
Dependent Claim
19 words
A support according to claim 1, wherein said metal substrate consists of a metal plate or a metal drum.
Claim 4
Dependent Claim
32 words
A support according to claim 1, wherein said barrier layer has been formed by grinding said surface of said substrate with a grinding stone consisting essentially of said fine metal oxide particles.
Claim 5
Dependent Claim
37 words
A support according to claim 1, wherein said barrier layer has been formed by jetting a mixture of said fine metal oxide particles with water or grease, under a high pressure, against said surface of said substrate.
Claim 6
Dependent Claim
32 words
A support according to claim 1, wherein said barrier layer has been formed by spraying a mixture of said fine metal oxide particles and compressed air against said surface of said substrate.
Claim 7
Dependent Claim
33 words
A support according to claim 1, wherein said barrier layer has been formed by grinding said surface of said substrate with a resilient buffing wheel having said fine metal oxide particles attached thereto.
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) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |