US3719484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectrophoretic imaging method
Assignee: Xerox Corp
•
Filing: 1971-01-06
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Granted: 1973-03-06
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Expires: 1991-01-06
Abstract
Abstract A photoelectrophoretic ink is subjected to light and electric field a plurality of times during a single scanning pass over the ink by a plurality of web electrodes positioned within the boundaries of a narrow slit scanning light image.
Inventors
- 👤 R Egnaczak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:49
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
168 words
A method of continuous imaging which comprises: a. providing a first transparent conductive electrode; b. coating photoelectrophoretic ink suspension of electrically photosensitive particles in an electrically insulating carrier liquid on said first electrode; c. exposing said suspension on said first electrode to a slit scan light image projected through said electrode to form an imaging zone; d. providing a first electrically insulating web backed by a second electrode; e. bringing said first web into and out of contact with said suspension within said imaging zone while applying a potential difference between said first and second electrodes until an image is formed; f. bringing at least one other electrically insulating web backed by an electrode into and out of contact with said imaging suspension while applying a potential difference between said electrode and said first electrode until said image is improved; and, g. moving said webs and said first electrode in a manner to establish a substantially zero relative velocity between each of said webs and said first electrode.
Claim 2
Independent Claim
168 words
A method of continuous imaging which comprises: a. providing a first transparent conductive electrode; b. coating photoelectrophoretic ink suspension of electrically photosensitive particles in an electrically insulating carrier liquid on said first electrode; c. exposing said suspension on said first electrode to a slit scan light image projected through said electrode to form an imaging zone; d. providing a first electrically insulating web backed by a second electrode; e. bringing said first web into and out of contact with said suspension within said imaging zone while applying a potential difference between said first and second electrodes until an image is formed; f. bringing at least one other electrically insulating web backed by an electrode into and out of contact with said imaging suspension while applying a potential difference between said electrode and said first electrode until said image is improved; and, g. moving said webs and said first electrode in a manner to establish a substantially zero relative velocity between each of said webs and said first electrode.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein said webs include webs formed into continuous loops.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein said webs include webs not formed into continuous loops.
Claim 5
Dependent Claim
20 words
The method of claim 1 further including adding an electrically insulating liquid to a web prior to entering said nip.
Claim 6
Dependent Claim
17 words
The method of claim 1 wherein said transparent electrode includes at least a section of a cylinder.
Claim 7
Dependent Claim
13 words
The method of claim 1 wherein said transparent electrode includes a flat plate.
Claim 8
Dependent Claim
23 words
The method of claim 6 wherein said slit light image is formed by steps including flooding a narrow region of an opaque original.
Claim 9
Dependent Claim
18 words
The method of claim 1 wherein an imaging electrode includes said web wrapped around a small diameter roller.
References Cited (Backward Citations)
US3553093A
Cited
US3586615A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |