US4040827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Development imaging methods
Assignee: Xerox Corp
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Filing: 1975-10-29
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Granted: 1977-08-09
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Expires: 1995-10-29
Abstract
Abstract An imaging method is given whereby a latent electrostatographic image is developed by a developer containing liquid developer dispensing roll having excellent dimensional stability and resiliency having a thin, hard surface carrying the liquid developer on a resilient shell supported by a hard metal shaft.
Inventors
- 👤 Ralph A. Hamaker
- 👤 George Phillip Carr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:42
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/101; G03G15/102
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
121 words
A method of cyclically developing an electrostatic latent image on a reusable imaging surface comprising forming an electrostatic latent image on the imaging surfaces, developing the image with a liquid developer carried in the valleys of a patterned applicator roll comprising a hard, dimensionally stable, patterned surface having a thickness of from about 4 to about 12 mils and having a plurality of lands and valleys, said surface covering a deformable, resilient substrate having from about 0.05 to about one inch thickness and a Shore A hardness of from about 50 to about 90 on a support, transferring the developing image from the imaging surface to a receiving surface in image configuration, and repeating the cycle at least one additional time.
Claim 2
Independent Claim
121 words
A method of cyclically developing an electrostatic latent image on a reusable imaging surface comprising forming an electrostatic latent image on the imaging surfaces, developing the image with a liquid developer carried in the valleys of a patterned applicator roll comprising a hard, dimensionally stable, patterned surface having a thickness of from about 4 to about 12 mils and having a plurality of lands and valleys, said surface covering a deformable, resilient substrate having from about 0.05 to about one inch thickness and a Shore A hardness of from about 50 to about 90 on a support, transferring the developing image from the imaging surface to a receiving surface in image configuration, and repeating the cycle at least one additional time.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein the hard, dimensionally stable, patterned surface comprises a thermosetting polymer.
Claim 4
Dependent Claim
20 words
The method of claim 2 wherein said polymer comprises a polyurethane having a volume resistivity of about 10 5 ohm-centimeters.
Claim 5
Dependent Claim
22 words
The method of claim 2 wherein said polymer comprises polyurethane having added thereto less than about 20 percent by weight fumed silica.
Claim 6
Dependent Claim
18 words
The method of claim 1 wherein said resilient substrate has a volume resistivity of about 10 5 ohm-centimeters.
Claim 7
Dependent Claim
21 words
The method of claim 1 wherein said resilient substrate has a Shore A hardness of from about 50 to about 90.
Claim 8
Dependent Claim
22 words
The method of claim 1 wherein said resilient substrate comprises a resilient elastomer-like material having a Shore A hardness of about 70.
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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |