US3684362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent electrode
Assignee: Xerox Corp
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Filing: 1970-01-02
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Granted: 1972-08-15
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Expires: 1990-01-02
Abstract
Abstract An apparatus particularly useful for the production of copies in electrophotographic imaging processes comprising a rotatable cylinder, transparent to electromagnetic radiation, having an electrically conductive transparent coating thereon and having therein a source of electromagnetic radiation. The electrically conductive coating is covered with an electrically insulating coating. The device provides simultaneous application of an electric field across an imaging member and exposure of the imaging member to electromagnetic radiation.
Inventors
- 👤 John W Weigl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:03
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/08
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
140 words
In a copying apparatus, a rotatable cylinder transparent to electromagnetic radiation having an electrically conductive transparent coating thereon and a transparent electrically insulating coating over said electrically conductive coating, said cylinder having therein a source of electromagnetic radiation, said conductive coating being adapted to associate with an exterior electrode so as to place an electric field across at least a portion of an area capable of receiving electromagnetic radiation from said source, an exterior electrode positioned to receive a sandwich comprising an electrically photo-sensitive imaging layer sandwiched between a donor layer and a receiver layer having an original document adjacent at least one side of said sandwich within said area capable of receiving electromagnetic radiation from said source, whereby said imaging layer and said original document is exposed to said radiation while subjected to an electric field between said electrodes.
Claim 2
Dependent Claim
140 words
In a copying apparatus, a rotatable cylinder transparent to electromagnetic radiation having an electrically conductive transparent coating thereon and a transparent electrically insulating coating over said electrically conductive coating, said cylinder having therein a source of electromagnetic radiation, said conductive coating being adapted to associate with an exterior electrode so as to place an electric field across at least a portion of an area capable of receiving electromagnetic radiation from said source, an exterior electrode positioned to receive a sandwich comprising an electrically photo-sensitive imaging layer sandwiched between a donor layer and a receiver layer having an original document adjacent at least one side of said sandwich within said area capable of receiving electromagnetic radiation from said source, whereby said imaging layer and said original document is exposed to said radiation while subjected to an electric field between said electrodes.
Claim 3
Dependent Claim
16 words
The apparatus of claim 1 wherein said receiver layer is conductive and comprises said exterior electrode.
Claim 4
Dependent Claim
20 words
The apparatus of claim 1 wherein said receiver layer contains a conductive layer, which conductive layer comprises said exterior electrode.
Claim 5
Dependent Claim
22 words
The apparatus of claim 1 further including a source of electric potential within said cylinder in electrical communication with the conductive coating.
Claim 6
Dependent Claim
26 words
The apparatus of claim 1 wherein the source of electromagnetic radiation provides radiation in the visible light range and the rotatable cylinder is a glass cylinder.
Claim 7
Dependent Claim
14 words
The apparatus of claim 1 wherein the electrically insulating coating comprises a thermoplastic material.
Claim 8
Dependent Claim
15 words
The apparatus of claim 1 wherein the electrically conductive coating is deposited upon the cylinder.
Claim 9
Dependent Claim
20 words
The apparatus of claim 1 wherein the conductive coating is deposited upon the inner surface of the electrically insulating coating.
Claim 10
Dependent Claim
15 words
The apparatus of claim 1 further including a source of electric potential within said cylinder.
Claim 11
Dependent Claim
15 words
The apparatus of claim 1 further including a source of electric potential without said cylinder.
Claim 12
Dependent Claim
15 words
The apparatus of claim 1 wherein the electrically conductive transparent coating is a metallic coating.
Claim 13
Dependent Claim
25 words
The apparatus of claim 11 wherein the thickness of the conductive coating is in the range of from about 0.05 microns to about 55 microns.
Claim 14
Independent Claim
174 words
An apparatus for simultaneously exposing an electrically photosensitive imaging layer and an original document to electromagnetic radiation while subjecting said layer to an electric field which comprises an electric power supply, a rotatable cylinder transparent to said electromagnetic radiation having an electrically conductive transparent coating thereon, said conductive coating forming one electrode of said power supply, a transparent electrically insulating coating over said electrically conductive coating, said cylinder having therein a source of electromagnetic radiation and said electric power supply, said conductive coating being adapted to associate with an exterior electrode so as to place an electric field across at least a portion of an area capable of receiving electromagnetic radiation from said source and a second moveable electrode of said power supply in spaced relationship to electricAlly insulating layer so as to receive a sandwich comprising an electrically photosensitive imaging layer sandwiched between a donor layer and a receiver layer and said original document adjacent at least one side of said sandwich in said area capable of receiving electromagnetic radiation from said source.
Claim 15
Independent Claim
174 words
An apparatus for simultaneously exposing an electrically photosensitive imaging layer and an original document to electromagnetic radiation while subjecting said layer to an electric field which comprises an electric power supply, a rotatable cylinder transparent to said electromagnetic radiation having an electrically conductive transparent coating thereon, said conductive coating forming one electrode of said power supply, a transparent electrically insulating coating over said electrically conductive coating, said cylinder having therein a source of electromagnetic radiation and said electric power supply, said conductive coating being adapted to associate with an exterior electrode so as to place an electric field across at least a portion of an area capable of receiving electromagnetic radiation from said source and a second moveable electrode of said power supply in spaced relationship to electricAlly insulating layer so as to receive a sandwich comprising an electrically photosensitive imaging layer sandwiched between a donor layer and a receiver layer and said original document adjacent at least one side of said sandwich in said area capable of receiving electromagnetic radiation from said source.
Claim 16
Dependent Claim
24 words
The apparatus of claim 13 wherein the electrically photosensitive imaging layer is cohesively weak and sandwiched between a donor sheet and a receiver sheet.
Claim 17
Dependent Claim
25 words
The apparatus of claim 13 wherein the thickness of the conductive coating is in the range of from about 0.05 microns to about 55 microns.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |