US3657103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode imaging system
Assignee: Xerox Corp
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Filing: 1969-05-02
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Granted: 1972-04-18
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Expires: 1989-05-02
Abstract
Abstract Method and apparatus for improving imaging and eliminating corona arcing during imaging of an electrophoretic imaging system employing a blocking electrode having individually insulated electrical conductive portions behind a blocking layer and a commutating means to activate the conductive portions such that an electric field is generated in a manner preventing air ionization or corona arcing between electrodes of the imaging system.
Inventors
- 👤 Donald J Fisher
- 👤 Robert G Davies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:46
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/04
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
128 words
In an apparatus for imaging electrophoretic suspensions having a first electrode adapted to support an image formed from the suspension, a second electrode having a blocking surface for contacting the suspension on the first electrode such that the suspension is maintained therebetween in a contact zone, means to couple at least one of said electrodes to an electrical supply source, and means to expose the suspension between the electrodes to activating electromagnetic radiation, the improvements including, means to electrically isolate a portion of the second electrode in the contact zone, and means to electrically connect to said means to couple to apply an electrical field between said electrodes whereby the portion of said second electrode in the contact zone has a field with respect to the first electrode.
Claim 2
Dependent Claim
128 words
In an apparatus for imaging electrophoretic suspensions having a first electrode adapted to support an image formed from the suspension, a second electrode having a blocking surface for contacting the suspension on the first electrode such that the suspension is maintained therebetween in a contact zone, means to couple at least one of said electrodes to an electrical supply source, and means to expose the suspension between the electrodes to activating electromagnetic radiation, the improvements including, means to electrically isolate a portion of the second electrode in the contact zone, and means to electrically connect to said means to couple to apply an electrical field between said electrodes whereby the portion of said second electrode in the contact zone has a field with respect to the first electrode.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1 wherein said second electrode blocking surface is an endless member.
Claim 4
Dependent Claim
54 words
The apparatus of claim 1 wherein said means to electrically connect includes first contact means for applying an electrical potential from said means to couple on a first portion of the second electrode within the contact zone and second contact means to provide a lesser potential on a second portion of said second electrode.
Claim 5
Dependent Claim
19 words
The apparatus of claim 1 wherein said means to apply an electrical field includes a plurality of conductive pins.
Claim 6
Dependent Claim
16 words
The apparatus of claim 1 wherein said means to apply an electrical field includes conductive segments.
Claim 7
Dependent Claim
45 words
The apparatus of claim 5 wherein said conductive segments include strips on the side of the blocking surface opposite tHe side adapted to contact the suspension, said strips extending parallel to the electrode interface and across the length of the contact zone between the electrodes.
Claim 8
Dependent Claim
34 words
The apparatus of claim 5 wherein said conductive segments include sectors contacting the blocking surface on the side opposite the electrode interface, and extending across the length of the contact zone between the electrodes.
Claim 9
Dependent Claim
20 words
The apparatus of claim 5 wherein said segments are spaced to provide half-tone image patterning during imaging of the suspension.
Claim 10
Dependent Claim
58 words
A blocking electrode for an electrophoretic suspension imaging system including a blocking surface, means to support said surface, conducting means between said means to support and said surface, means to electrically isolate a portion of said conducting means, means to electrically contact said conducting means whereby the conducting means contacted are connectable to an electrical potential supply source.
Claim 11
Dependent Claim
58 words
A blocking electrode for an electrophoretic suspension imaging system including a blocking surface, means to support said surface, conducting means between said means to support and said surface, means to electrically isolate a portion of said conducting means, means to electrically contact said conducting means whereby the conducting means contacted are connectable to an electrical potential supply source.
Claim 12
Dependent Claim
46 words
The apparatus of claim 9 wherein said conducting means includes a plurality of conductive segments and said means to isolate includes electrical insulating means positioned such that each of the plurality of conductive segments are electrically separated from other of the plurality by the insulating means.
Claim 13
Dependent Claim
16 words
The apparatus of claim 9 wherein said conducting means includes pins extending into the blocking surface.
Claim 14
Dependent Claim
23 words
The apparatus of claim 9 wherein said conducting means includes conductive sectors abutting said blocking surface between said surface and said support means.
Claim 15
Dependent Claim
17 words
The apparatus of claim 9 wherein said conducting means includes conductive strips extending parallel to each other.
Claim 16
Dependent Claim
12 words
The apparatus of claim 9 wherein said conducting means includes a semi-conductor.
Claim 17
Dependent Claim
16 words
The apparatus of claim 9 wherein said blocking material surface is formed as an endless member.
Claim 18
Dependent Claim
27 words
The apparatus of claim 15 wherein said means to electrically contact includes a liquid conductor floatable on the conducting means and connectors attached to said liquid conductor.
References Cited (Backward Citations)
US3477934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |