US4960660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High resolution superimposed images from photopolymer electrographic master
Assignee: EIDP Inc
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Filing: 1989-03-31
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Granted: 1990-10-02
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Expires: 2009-03-31
Abstract
Abstract Process for preparation of high resolution image exposing imagewise a photopolymerizable element having a removable cover sheet and a conductive support or a temporary support which is replaced by a conductive support, stripping the cover sheet and laminating the imagewise exposed photopolymerizable layer to a second exposed photopolymerizable layer on a temporary support, removing the temporary support, charging electrostatically the exposed photopolymerizable layers, developing, e.g., liquid electrostatic developer or dry toner developer, and optionally transferring the developed image to a receptor surface, e.g., paper. The process is useful in preparing multiple copies in more than one version, e.g., logos, headlines, corrections, etc.
Inventors
- 👤 Alan S. Dubin
- 👤 Catharine E. Looney
- 👤 Steven P. Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:00
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/0202; G03F; G03F7/00; G03F7/26; G03F7/34
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
110 words
A process for the preparation of high resolution images comprising (A) exposing a photopolymerizable electrographic element comprising in order; a conductive support, a first photopolymerizable layer and a strippable cover sheet, imagewise to actinic radiation through the cover sheet; (B) stripping the cover sheet from the imagewise exposed photopolymerizable layer; (C) laminating to the surface of the imagewise exposed photopolymerizable layer a photopolymerizable element comprising an imagewise exposed photopolymerizable layer on a temporary surface, the two photopolymerizable layers in contact; (D) peeling off the temporary surface from the exposed photopolymerizable layer; (E) charging electrostatically the exposed photopolymerizable layers; and (F) developing the electrostatically charged exposed image with a first developer.
Claim 2
Dependent Claim
110 words
A process for the preparation of high resolution images comprising (A) exposing a photopolymerizable electrographic element comprising in order; a conductive support, a first photopolymerizable layer and a strippable cover sheet, imagewise to actinic radiation through the cover sheet; (B) stripping the cover sheet from the imagewise exposed photopolymerizable layer; (C) laminating to the surface of the imagewise exposed photopolymerizable layer a photopolymerizable element comprising an imagewise exposed photopolymerizable layer on a temporary surface, the two photopolymerizable layers in contact; (D) peeling off the temporary surface from the exposed photopolymerizable layer; (E) charging electrostatically the exposed photopolymerizable layers; and (F) developing the electrostatically charged exposed image with a first developer.
Claim 3
Dependent Claim
16 words
A process according to claim 1 wherein the developer image is transferred to a receptor support.
Claim 4
Dependent Claim
41 words
A process according to claim 1 wherein the electrostatically charged exposed image is developed with a first developer, and after the charge on the first photopolymerizable layer has dissipated, the charge on the second layer is developed with a second developer.
Claim 5
Dependent Claim
17 words
A process according to claim 3 wherein the finally developed image is transferred to a receptor support.
Claim 6
Dependent Claim
31 words
A process according to claim 1 wherein each photopolymerizable layer consists essentially of an organic polymeric binder, at least one compound having at least one ethylenically unsaturated group, and a photoinitiator.
Claim 7
Dependent Claim
15 words
A process according to claim 5 wherein the photopolymerizable layer contains a chain transfer agent.
Claim 8
Dependent Claim
44 words
A process according to claim 6 wherein the photopolymerizable layer contains an organic compound selected from the group consisting of at least one organic electron donor, at least one organic electron acceptor, and a substituted aromatic amino compound with or without a strong acid.
Claim 9
Dependent Claim
16 words
A process according to claim 1 wherein the exposed photopolymerizable layers are charged by corona discharge.
Claim 10
Dependent Claim
17 words
A process according to claim 1 wherein the developing is accomplished with a dry electrostatic toner developer.
Claim 11
Dependent Claim
16 words
A process according to claim 1 wherein the developing is accomplished with a liquid electrostatic developer.
Claim 12
Dependent Claim
56 words
A process according to claim 10 wherein the liquid electrostatic developer consists essentially of (a) a nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount, (b) thermoplastic resin particles having an average by area particle size of less than 10 μm, and (c) a nonpolar liquid soluble charge director compound.
Claim 13
Dependent Claim
16 words
A process according to claim 11 wherein the developed image is transferred to a receptor support.
Claim 14
Dependent Claim
41 words
A process according to claim 11 wherein the electrostatically charged exposed image is developed with a first developer, and after the charge on the first photopolymerizable layer has dissipated, the charge on the second layer is developed with a second developer.
Claim 15
Dependent Claim
17 words
A process according to claim 13 wherein the finally developed image is transferred to a receptor support.
Claim 16
Dependent Claim
14 words
A process according to claim 14 wherein the transfer is accomplished by electrostatic means.
Claim 17
Dependent Claim
146 words
A process for the preparation of a high resolution, correct reading image comprising (A) exposing a photopolymerizable electrographic element comprising in order, a temporary support, a first photopolymerizable layer, and a strippable cover sheet, imagewise to actinic radiation through the cover sheet; (B) stripping the cover sheet from the exposed photopolymerizable layer; (C) laminating the surface of the exposed photopolymerizable layer to a conductive substrate; (D) peeling off the temporary support from the exposed photopolymerizable layer; (E) laminating to the surface of the imagewise exposed photopolymerizable layer a photopolymerizable element comprising an imagewise exposed photopolymerizable layer on a temporary surface, the two photopolymerizable layers in contact; (F) peeling off the temporary surface from the exposed photopolymerizable layer; (G) charging electrostatically the exposed photopolymerizable layers to form a latent image of electrostatic charge on the exposed areas; (H) developing the electrostatically charged exposed image with a developer.
Claim 18
Dependent Claim
146 words
A process for the preparation of a high resolution, correct reading image comprising (A) exposing a photopolymerizable electrographic element comprising in order, a temporary support, a first photopolymerizable layer, and a strippable cover sheet, imagewise to actinic radiation through the cover sheet; (B) stripping the cover sheet from the exposed photopolymerizable layer; (C) laminating the surface of the exposed photopolymerizable layer to a conductive substrate; (D) peeling off the temporary support from the exposed photopolymerizable layer; (E) laminating to the surface of the imagewise exposed photopolymerizable layer a photopolymerizable element comprising an imagewise exposed photopolymerizable layer on a temporary surface, the two photopolymerizable layers in contact; (F) peeling off the temporary surface from the exposed photopolymerizable layer; (G) charging electrostatically the exposed photopolymerizable layers to form a latent image of electrostatic charge on the exposed areas; (H) developing the electrostatically charged exposed image with a developer.
Claim 19
Dependent Claim
16 words
A process according to claim 16 wherein the developed image is transferred to a receptor support.
Claim 20
Dependent Claim
29 words
A process according to claim 16 wherein the electrostatically charged developed exposed image, after the charge on the first photopolymerizable layer has dissipated, is developed with a second developer.
Claim 21
Dependent Claim
17 words
A process according to claim 18 wherein the finally developed image is transferred to a receptor support.
Claim 22
Dependent Claim
31 words
A process according to claim 16 wherein each photopolymerizable layer consists essentially of an organic polymeric binder, at least one compound having at least one ethylenically unsaturated group, and a photoinitiator.
Claim 23
Dependent Claim
15 words
A process according to claim 20 wherein the photopolymerizable layer contains a chain transfer agent.
Claim 24
Dependent Claim
44 words
A process according to claim 21 wherein the photopolymerizable layer contains an organic compound selected from the group consisting of at least one organic electron donor, at least one organic electron acceptor, and a substituted aromatic amino compound with or without a strong acid.
Claim 25
Dependent Claim
16 words
A process according to claim 16 wherein the exposed photopolymerizable layers are charged by corona discharge.
Claim 26
Dependent Claim
16 words
A process according to claim 16 wherein the developing is accomplished with a dry electrostatic developer.
Claim 27
Dependent Claim
16 words
A process according to claim 16 wherein the developing is accomplished with a liquid electrostatic developer.
Claim 28
Dependent Claim
56 words
A process according to claim 25 wherein the liquid electrostatic developer consists essentially of (a) a nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount, (b) thermoplastic resin particles having an average by area particle size of less than 10 μm, and (c) a nonpolar liquid soluble charge director compound.
Claim 29
Dependent Claim
16 words
A process according to claim 26 wherein the developed image is transferred to a receptor support.
Claim 30
Dependent Claim
29 words
A process according to claim 26 wherein the electrostatically charged developed exposed image, after the charge on the first photopolymerizable layer has dissipated, is developed with a second developer.
Claim 31
Dependent Claim
17 words
A process according to claim 28 wherein the finally developed image is transferred to a receptor support.
Claim 32
Dependent Claim
14 words
A process according to claim 29 wherein the transfer is accomplished by electrostatic means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-01 | 1994-04-02 | 1994-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-01 | 1998-04-02 | 1998-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-01 | 2002-04-02 | 2002-10-02 | $7700.00 | Window Closed / Lapsed |