US3972305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imaging system
Assignee: Xerox Corp
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Filing: 1975-03-21
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Granted: 1976-08-03
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Expires: 1995-03-21
Abstract
Abstract Images are formed by transporting a recording surface bearing an electrostatic latent image adjacent to a spaced parallel surface of a development electrode and supplying a liquid developer between the recording surface and parallel surface of the development electrode at substantially the same velocity as the velocity of the recording surface.
Inventors
- 👤 Masamichi Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:16
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/101
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
192 words
An apparatus for forming images comprising means to support an electrostatographic imaging member having a recording surface, a development electrode having a leading edge extending transversely across at least the width of said recording surface and a trailing edge extending across at least the width of said recording surface wherein said development electrode is spaced from and parallel to at least a portion of said recording surface, means to transport said recording surface at a velocity of at least about 40 centimeters per second past said development electrode, pumping means to flow a liquid developer between said recording surface and said development electrode at a velocity substantially equal to the velocity of said recording surface so that little or no relative movement exists between said liquid developer and said recording surface to thereby avoid depletion of developer marking particle deposit on said recording surface, and a raised lip along said leading edge and a raised lip along said trailing edge of said development electrode to direct the flow of said liquid developer between said recording surface and said development electrode and to seal said liquid developer from exposure to the ambient atmosphere.
Claim 2
Independent Claim
192 words
An apparatus for forming images comprising means to support an electrostatographic imaging member having a recording surface, a development electrode having a leading edge extending transversely across at least the width of said recording surface and a trailing edge extending across at least the width of said recording surface wherein said development electrode is spaced from and parallel to at least a portion of said recording surface, means to transport said recording surface at a velocity of at least about 40 centimeters per second past said development electrode, pumping means to flow a liquid developer between said recording surface and said development electrode at a velocity substantially equal to the velocity of said recording surface so that little or no relative movement exists between said liquid developer and said recording surface to thereby avoid depletion of developer marking particle deposit on said recording surface, and a raised lip along said leading edge and a raised lip along said trailing edge of said development electrode to direct the flow of said liquid developer between said recording surface and said development electrode and to seal said liquid developer from exposure to the ambient atmosphere.
Claim 3
Dependent Claim
52 words
An apparatus according to claim 1 wherein said development electrode is provided with a slot adjacent said leading edge extending transversely across at least the width of said recording surface, said slot being operatively coupled to said pumping means to flow said liquid developer between said recording surface and said development electrode.
Claim 4
Dependent Claim
54 words
An apparatus according to claim 1 wherein said development electrode is provided with a slot adjacent said trailing edge extending transversely across at least the width of said recording surface, said slot being operatively coupled to said pumping means to flow said liquid developer out from between said recording surface and said development electrode.
Claim 5
Dependent Claim
15 words
An apparatus according to claim 1 wherein said pumping means comprises a variable speed pump.
Claim 6
Independent Claim
196 words
An apparatus for forming images comprising means to support an electrostatographic imaging member having a recording surface, a development electrode having a leading edge extending transversely across at least the width of said recording surface and a trailing edge extending across at least the width of said recording surface wherein said development electrode is spaced from and parallel to at least a portion of said recording surface, means to transport said recording surface at a velocity of at least about 40 centimeters per second in an arcuate path past said development electrode, pumping means to flow a liquid developer between said recording surface and said development electrode at a velocity substantially equal to the velocity of said recording surface so that little or no relative movement exists between said liquid developer and said recording surface to thereby avoid depletion of developer marking particle deposit on said recording surface, and a raised lip along said leading edge and a raised lip along said trailing edge of said development electrode to direct the flow of said liquid developer between said recording surface and said development electrode and to seal said liquid developer from exposure to the ambient atmosphere.
Claim 7
Independent Claim
196 words
An apparatus for forming images comprising means to support an electrostatographic imaging member having a recording surface, a development electrode having a leading edge extending transversely across at least the width of said recording surface and a trailing edge extending across at least the width of said recording surface wherein said development electrode is spaced from and parallel to at least a portion of said recording surface, means to transport said recording surface at a velocity of at least about 40 centimeters per second in an arcuate path past said development electrode, pumping means to flow a liquid developer between said recording surface and said development electrode at a velocity substantially equal to the velocity of said recording surface so that little or no relative movement exists between said liquid developer and said recording surface to thereby avoid depletion of developer marking particle deposit on said recording surface, and a raised lip along said leading edge and a raised lip along said trailing edge of said development electrode to direct the flow of said liquid developer between said recording surface and said development electrode and to seal said liquid developer from exposure to the ambient atmosphere.
Claim 8
Dependent Claim
15 words
An apparatus according to claim 5 wherein said pumping means comprises a variable speed pump.
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) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |