US4023968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectrophoretic color imaging process in which back migration is eliminated
Assignee: Xerox Corp
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Filing: 1972-10-25
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Granted: 1977-05-17
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Expires: 1992-10-25
Abstract
Abstract In an electrophoretic reproduction process wherein a colored reproduction of an original is obtained by sequentially electrophoretically generating at least two visible monochromatic images, and superimposing said images in registry upon a copy web to form a colored reproduction, an improvement is provided comprising essentially eliminating back migration of marking materials from the copy web to the imaging suspension in the second and subsequent image generating steps by employing, in each instance, marking materials comprising a solvent tackifiable polymer and a colorant and/or a copy web containing a solvent tackifiable polymer, and applying to the copy web at least a partial solvent for said tackifiable polymer in an amount sufficient to render said polymer at least partially tacky before the second and before each subsequent image generating step.
Inventors
- 👤 Alan B. Amidon
- 👤 Joseph Mammino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:18
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/04
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
166 words
In an electrophoretic reproduction process wherein a colored reproduction of an original is obtained by sequentially electrophoretically generating at least two visible monochromatic images, and superimposing said images in registry upon an image receiving surface to form a colored reproduction, the improvement comprising essentially eliminating back migration of particulate marking materials from the image receiving surface to the imaging suspension in the second and subsequent image generating steps by employing, in each instance, particulate marking materials comprising a solvent tackifiable polymer and a colorant and/or an image receiving surface containing a solvent tackifiable polymer, and applying to the image receiving surface at least a partial solvent for said tackifiable polymer in an amount sufficient to render said polymer at least partially tacky to adhesively secure the image to the image receiving surface while substantially retaining intact the initial dimensions of said particulate marking materials wherein said solvent is applied to the image receiving surface after each image is formed and before each subsequent image generating step.
Claim 2
Dependent Claim
166 words
In an electrophoretic reproduction process wherein a colored reproduction of an original is obtained by sequentially electrophoretically generating at least two visible monochromatic images, and superimposing said images in registry upon an image receiving surface to form a colored reproduction, the improvement comprising essentially eliminating back migration of particulate marking materials from the image receiving surface to the imaging suspension in the second and subsequent image generating steps by employing, in each instance, particulate marking materials comprising a solvent tackifiable polymer and a colorant and/or an image receiving surface containing a solvent tackifiable polymer, and applying to the image receiving surface at least a partial solvent for said tackifiable polymer in an amount sufficient to render said polymer at least partially tacky to adhesively secure the image to the image receiving surface while substantially retaining intact the initial dimensions of said particulate marking materials wherein said solvent is applied to the image receiving surface after each image is formed and before each subsequent image generating step.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein particulate marking materials comprising a solvent tackifiable polymer and a colorant are employed.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein the image receiving surface contains a solvent tackifiable polymer.
Claim 5
Dependent Claim
19 words
The process of claim 1 wherein cyan, magenta, and yellow images are superimposed to provide a full color reproduction.
Claim 6
Dependent Claim
21 words
The process of claim 1 wherein the solvent or partial solvent is applied to the underside of the image receiving surface.
Claim 7
Dependent Claim
17 words
The process of claim 1 wherein the superimposed images are finally fixed to the image receiving surface.
Claim 8
Dependent Claim
93 words
The process as defined in claim 2 wherein said monochromatic images are formed by a photoelectrophoretic process comprising providing a layer of an imaging suspension comprising particulate marking materials in an electrically insulating carrier liquid between a pair of electrodes at least one of which is at least partially transparent wherein said colorant is an electrically photosensitive pigment particle, subjecting said suspension to an electrical field and exposing said suspension to imagewise activating electromagnetic radiation through said transparent electrode, and wherein said image receiving surface is a surface of one of said electrodes.
Claim 9
Dependent Claim
103 words
The process as defined in claim 2 wherein said monochromatic images are formed by a photoelectrophoretic process comprising providing a layer of an imaging suspension comprising particulate marking materials in an electrically insulating carrier liquid between a pair of electrodes at least one of which is at least partially transparent, wherein said colorant is an electrically photosensitive pigment particle, subjecting said suspension to an electrical field and exposing said suspension to imagewise activating electromagnetic radiation through said transparent electrode, and wherein said image receiving surface is a receiver member interposed between the surface of one of said electrodes and said imaging suspension layer.
Claim 10
Dependent Claim
21 words
The process as defined in claim 8 wherein cyan, magenta and yellow images are superimposed to provide a full color reproduction.
Claim 11
Dependent Claim
108 words
The process as defined in claim 2 wherein said monochromatic images are formed by a process comprising providing a layer of an imaging suspension comprising particulate marking materials in an electrically insulating carrier liquid between a pair of electrodes at least one of which has a photoconductive surface and at least one of which is at least partially transparent, wherein said colorant is an inert particle, subjecting said suspension to an electrical field and exposing said photoconductive surface to an imagewise pattern of electromagnetic radiation to which it is sensitive through said transparent electrode, and wherein said image receiving surface is a surface of one of said electrodes.
Claim 12
Dependent Claim
118 words
The process as defined in claim 2 wherein said monochromatic images are formed by a process comprising providing a layer of an imaging suspension comprising particulate marking materials in an electrically insulating carrier liquid between a pair of electrodes at least one of which has a photoconductive surface and at least one of which is at least partially transparent, wherein said colorant is an inert particle, subjecting said suspension to an electrical field and exposing said photoconductive surface to an imagewise pattern of electromagnetic radiation to which it is sensitive through said transparent electrode, and wherein said image receiving surface is a receiver member interposed between the surface of one of said electrodes and said imaging suspension layer.
Claim 13
Dependent Claim
21 words
The process as defined in claim 11 wherein cyan, magenta and yellow images are superimposed to provide a full color reproduction.
Claim 14
Dependent Claim
103 words
The process as defined in claim 2 wherein said monochromatic images are formed by a process comprising providing a layer of an imaging suspension comprising particulate marking materials and electrically photosensitive pigment particles in an electrically insulating carrier liquid between a pair of electrodes at least one of which is at least partially transparent, wherein said colorant is an inert particle, subjecting said suspension to an electrical field and exposing said suspension to activating electromagnetic radiation to which said electrically photosensitive pigment particles are sensitive through said transparent electrode, and wherein said image receiving surface is a surface of one of said electrodes.
Claim 15
Dependent Claim
113 words
The process as defined in claim 2 wherein said monochromatic images are formed by a process comprising providing a layer of an imaging suspension comprising particulate marking materials and electrically photosensitive pigment particles in an electrically insulating carrier liquid between a pair of electrodes at least one of which is at least partially transparent, wherein said colorant is an inert particle, subjecting said suspension to an electrical field and exposing said suspension to activating electromagnetic radiation to which said electrically photosensitive pigment particles are sensitive through said transparent electrode, and wherein said image receiving surface is a receiver member interposed between the surface of one of said electrodes and said imaging suspension layer.
Claim 16
Dependent Claim
21 words
The process as defined in claim 14 wherein cyan, magenta and yellow images are superimposed to provide a full color reproduction.
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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) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |