US3582205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imaging apparatus
Assignee: Xerox Corp
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Filing: 1969-05-05
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Granted: 1971-06-01
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Expires: 1989-05-05
Abstract
Abstract An apparatus for improving electrophoretic imaging by filling the space between the electrodes of the electrophoretic imaging system with an insulating liquid, then contacting the suspension with the electrode and applying an electric field for imaging.
Inventors
- 👤 Leonard M Carreira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:33
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
15 words
The apparatus of claim 1 wherein one of said electrodes is at least partially transparent.
Claim 2
Independent Claim
115 words
An apparatus for electrophoretic imaging comprising in combination: a. a first electrode having a suspension of a photosensitive pigment in a liquid carrier maintained on a first portion thereof, b. a seconD electrode capable of being a blocking electrode maintained in near contact with a second portion of said first electrode thereby providing a gap therebetween, c. means to present an insulating liquid in a gap between said second electrode and a second portion of said first electrode, d. means to apply an electric field between said electrodes, and e. means to simultaneously project an image on said suspension and to move said second electrode relative to said first electrode in contact with said suspension.
Claim 3
Dependent Claim
38 words
The apparatus of claim 1 further including means to move said electrodes relative to each other such that said second electrode contacts the suspension on said first portion of said first electrode while maintaining the insulating liquid therebetween.
Claim 4
Dependent Claim
118 words
Apparatus for electrophoretic imaging comprising in combination: a first electrode capable of supporting a suspension of photosensitive pigment in a liquid carrier on a surface thereof, a second electrode capable of being a blocking electrode maintained in at least near contact with said first electrode and being shaped for providing a nip between said electrodes, means to present an insulating liquid at the entrance to the nip between said electrodes, means to move said electrodes relative to each other whereby the surfaces of the electrodes are traversed by the nip formed therebetween, means to simultaneously apply an electric field between said electrodes, and means to project an image on said suspension during the traversing movement of said electrodes.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |