US3870514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid development for the electronic photography
Assignee: Xerox Corp
•
Filing: 1973-06-18
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Granted: 1975-03-11
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Expires: 1993-06-18
Abstract
Abstract A device in a liquid development system to prevent soiling of support rollers for an imaging member wherein the support rollers previously soiled the back surface of the imaging member. The invention comprises insulating the support rollers and applying a developing voltage only when the imaging member has been inserted between the support rollers and another set of rollers which also serve as development electrodes so that voltage is not applied on a given roller pair not carrying the imaging member, thus developer material is not induced to flow on roller pairs not bearing the imaging member.
Inventors
- 👤 Masamichi Sato
- 👤 Shigeru Tezuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:40
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/101
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
The method of producing a visual reproduction of an object on the surface of an imaging member which comprises insulating support rollers for said imaging member from development electrode rollers in an electrophotographic device by passing successive portions of said imaging member between said support rollers and said development electrode rollers wherein said support rollers have upraised flanges at both ends thereof of a height between about 0.3 to 0.5 mm and a width between about 0.1 to about 1 mm, applying a developing voltage only when said imaging member has been inserted between said support rollers and said development electrode rollers so that no voltage is applied in the absence of said imaging member, and supplying liquid developer to said imaging member.
Claim 2
Independent Claim
123 words
The method of producing a visual reproduction of an object on the surface of an imaging member which comprises insulating support rollers for said imaging member from development electrode rollers in an electrophotographic device by passing successive portions of said imaging member between said support rollers and said development electrode rollers wherein said support rollers have upraised flanges at both ends thereof of a height between about 0.3 to 0.5 mm and a width between about 0.1 to about 1 mm, applying a developing voltage only when said imaging member has been inserted between said support rollers and said development electrode rollers so that no voltage is applied in the absence of said imaging member, and supplying liquid developer to said imaging member.
Claim 3
Independent Claim
122 words
THE METHOD OF PRODUCING A VISUAL REPRODUCTION OF AN OBJECT ON THE SURFACE OF AN IMAGING MEMBER WHICH COMPRISES INSULATING SUPPORT ROLLERS FOR SAID IMAGING MEMBER FROM DEVELOPMENT ELECTRODE ROLLERS IN AN ELECTROPHOTOGRAPHIC DEVICE BY PASSING SUCCESSIVE PORTIONS OF SAID IMAGING MEMBER BETWEEN SAID SUPPORT ROLLERS AND SAID DEVELOPMENT ELECTRODE ROLLERS WHEREIN SAID SUPPORT ROLLERS HAVE UPRAISED FLANGES AT BOTH ENDS THEREOF OF A HEIGHT BETWEEN ABOUT 0.3 TO 0.5 MM AND A WIDTH BETWEEN ABOUT 0.1 TO ABOUT 1 MM, APPLYING A DEVELOPING VOLTAGE ONLY WHEN SAID IMAGING MEMBER HAS BEEN INSERTED BETWEEN SAID SUPPORT ROLLERS AND SAID DEVELOPMENT ELECTRODE ROLLERS SO THAT NO VOLTAGE IS APPLIED IN THE ABSENCE OF SAID IMAGING MEMBER,ANS SUPPLYING LIQUID DEVELOPER TO SAID IMAGING MEMBER.
Claim 4
Independent Claim
122 words
THE METHOD OF PRODUCING A VISUAL REPRODUCTION OF AN OBJECT ON THE SURFACE OF AN IMAGING MEMBER WHICH COMPRISES INSULATING SUPPORT ROLLERS FOR SAID IMAGING MEMBER FROM DEVELOPMENT ELECTRODE ROLLERS IN AN ELECTROPHOTOGRAPHIC DEVICE BY PASSING SUCCESSIVE PORTIONS OF SAID IMAGING MEMBER BETWEEN SAID SUPPORT ROLLERS AND SAID DEVELOPMENT ELECTRODE ROLLERS WHEREIN SAID SUPPORT ROLLERS HAVE UPRAISED FLANGES AT BOTH ENDS THEREOF OF A HEIGHT BETWEEN ABOUT 0.3 TO 0.5 MM AND A WIDTH BETWEEN ABOUT 0.1 TO ABOUT 1 MM, APPLYING A DEVELOPING VOLTAGE ONLY WHEN SAID IMAGING MEMBER HAS BEEN INSERTED BETWEEN SAID SUPPORT ROLLERS AND SAID DEVELOPMENT ELECTRODE ROLLERS SO THAT NO VOLTAGE IS APPLIED IN THE ABSENCE OF SAID IMAGING MEMBER,ANS SUPPLYING LIQUID DEVELOPER TO SAID IMAGING MEMBER.
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |