US3601483A
Expired / Lapsed
US
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Imaging apparatus
Assignee: Xerox Corp
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Filing: 1969-05-16
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Granted: 1971-08-24
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Expires: 1989-05-16
Abstract
Abstract Imaging apparatus for making photoelectrophoretic images by placing a photoelectrophoretic suspension between two or more electrodes while exposing the suspension to activating electromagnetic radiation and an electric field. An electric field may be generated electrostatically either before or during imaging in any manner such as by a corona discharge device or by frictionally rubbing the surface of one of the electrodes.
Inventors
- 👤 Leonard M Carreira
- 👤 Vsevolod Tulagin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:50
CPC Classifications
C; C25; C25D; C25D13/00; G; G03; G03G; G03G17/00; G03G17/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
16 words
The apparatus of claim 1 wherein said electrostatic charge generating means is a corona generating device.
Claim 2
Dependent Claim
13 words
The apparatus of claim 2 wherein said corona generating device is a corotron.
Claim 3
Dependent Claim
32 words
The apparatus of claim 1 wherein said electrostatic charge generating means includes a material for depositing a charge on one of the electrodes with which it makes friction contact to improve imaging.
Claim 4
Dependent Claim
15 words
The apparatus of claim 1 wherein said first and second electrodes have insulating layers thereon.
Claim 5
Dependent Claim
32 words
The apparatus of claim 5 wherein said electrostatic charging generating means is positioned to operate on one of said electrodes prior to the application of the suspension to one of said electrodes.
Claim 6
Dependent Claim
33 words
The apparatus of claim 5 wherein said electrostatic charge generating means deposits a charge on one of said electrodes opposite to the potential of the field supplied by the electric field generating means.
Claim 7
Dependent Claim
28 words
The apparatus of claim 1 wherein the electrodes are flat members having the suspension coated therebetween and said electric field generating means includes an electrostatic charge generating means.
References Cited (Backward Citations)
US3474019A
Cited
US3442781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |