US4897327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Correct-reading images from photopolymer electrographic master
Assignee: EIDP Inc
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Filing: 1988-05-27
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Granted: 1990-01-30
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Expires: 2008-05-27
Abstract
Abstract Process for preparation of a correct reading image comprising (A) exposing imagewise to actinic radiation a photopolymerizable electrographic element comprising in order a temporary support, photopolymerizable layer, and a strippable cover sheet, the exposure being through the cover sheet; (B) stripping the cover sheet; (C) laminating the exposed surface of the photopolymerizable layer to a conductive substrate; (D) peeling off the temporary support; (E) charging electrostatically the exposed photopolymerizable layer to form a latent image of electrostatic charge on the exposed areas; (F) toning the electrostatically charged exposed imaged areas; and (G) transferring the toned image to a receptor support. Multiple copies can be produced with a single exposure. Overlay or surprint proofs can be prepared.
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 13:44
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03F; G03F7/00; G03F7/26; G03F7/34; G03G13/00; G03G13/22; G03G5/02; G03G5/026
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
123 words
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 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 exposed surface of the photopolymerizable layer to a conductive substrate; (D) peeling off the temporary support from the exposed photopolymerizable layer; (E) charging electrostatically the surface of the exposed photopolymerizable layer opposite to that which was originally exposed layer to form a latent image of the electrostatic charge on the exposed areas; (F) toning the electrostatically charged exposed image areas; and (G) transferring the tones image to a receptor support.
Claim 2
Dependent Claim
123 words
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 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 exposed surface of the photopolymerizable layer to a conductive substrate; (D) peeling off the temporary support from the exposed photopolymerizable layer; (E) charging electrostatically the surface of the exposed photopolymerizable layer opposite to that which was originally exposed layer to form a latent image of the electrostatic charge on the exposed areas; (F) toning the electrostatically charged exposed image areas; and (G) transferring the tones image to a receptor support.
Claim 3
Dependent Claim
12 words
A proces according to claim 1 wherein the receptor support is paper.
Claim 4
Dependent Claim
14 words
A process according to claim 1 wherein the receptor support is a polymeric film.
Claim 5
Dependent Claim
13 words
A process according to claim 1 wherein the conductive substrate is aluminized polyester.
Claim 6
Dependent Claim
14 words
A process according to claim 4 wherein the conductive substrate is a copper board.
Claim 7
Dependent Claim
17 words
A process according to claim 1 wherein the exposed photopolymerizable layer is charged electrostatically by corona discharge.
Claim 8
Dependent Claim
22 words
A process according to claim 1 wherein the electrostatically charged exposed image areas are toned by means of a liquid electrostatic toner.
Claim 9
Dependent Claim
22 words
A process according to claim 1 wherein the electrostatically charged exposed image areas are toned by means of a dry electrostatic toner.
Claim 10
Dependent Claim
22 words
a process according to claim 1 wherein steps (E), (F) and (G) are repeated to produce multiple copies with a single exposure.
Claim 11
Dependent Claim
33 words
A process according to claim 1 wherein The photopolymerizable layer of the the photopolymerizable element consists essentially of a polymeric binder, an ethylenically unsaturated monomeric compound, a photoinitiator, and a chain transfer agent.
Claim 12
Dependent Claim
14 words
A process according to claim 1 wherein the photoinitiator is a 2-o-substituted hexaarylbiimidazole compound.
Claim 13
Dependent Claim
11 words
A process according to claim 11 wherein the binder is poly(sytrene/methylmethacrylate).
Claim 14
Dependent Claim
11 words
A process according to claim 11 wherein the binder is polymethylmethacrylate.
Claim 15
Dependent Claim
58 words
A process according to claim 10 wherein the exposure is made through a right-reading halftone process-color separation negative film having its emulsion side in contact with the cover sheet of the photopolymerizable element, the charged element is toned with the corresponding process-color toner, the transferred toned image providing one layer of a 4-color overlay or surpring color proof.
Claim 16
Dependent Claim
45 words
A process according to claim 14 wherein a 4-color surprint on paper is prepared by repeating the steps 4 times using a different photopolymerizable element each time with a yellow, magenta, cyan and black right-reading process-color separation halftone negative film with the corresponding process-color toner.
Claim 17
Dependent Claim
138 words
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 photopolymerizable layer, and a strippable cover sheet, imagewise to actinic radiation from either the cover sheet or temporary support side of the element; (B) stripping the cover sheet or peeling off the temporary support prior to or subsequent to exposure from the exposed surface of the photopolymerizable layer; (C) laminating the exposed surface of the photopolymerizable layer to a conductive substrate; (D) peeling off either the temporary support or stripping the cover sheet from the exposed photopolymerizable layer; (E) charging electrostatically the surface of the exposed photopolymerizable layer opposite to that which was originally exposed; (F) tonign the electrostatically charged exposed image areas; and (G) transferring the toned iamge to a receptor support.
Claim 18
Dependent Claim
138 words
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 photopolymerizable layer, and a strippable cover sheet, imagewise to actinic radiation from either the cover sheet or temporary support side of the element; (B) stripping the cover sheet or peeling off the temporary support prior to or subsequent to exposure from the exposed surface of the photopolymerizable layer; (C) laminating the exposed surface of the photopolymerizable layer to a conductive substrate; (D) peeling off either the temporary support or stripping the cover sheet from the exposed photopolymerizable layer; (E) charging electrostatically the surface of the exposed photopolymerizable layer opposite to that which was originally exposed; (F) tonign the electrostatically charged exposed image areas; and (G) transferring the toned iamge to a receptor support.
Claim 19
Dependent Claim
25 words
A process according to claim 16 wherein the temporary support of the photopolymerizable electrographic element is a conductive support which is removed prior to exposure.
Claim 20
Dependent Claim
13 words
A process according to claim 17 wherein the conductive support is aluminized polyester.
Claim 21
Dependent Claim
19 words
A process according to claim 16 wherein the exposed photopolymerizable layer is laminated to a copper board conductive substrate.
Claim 22
Dependent Claim
12 words
A process according to claim 16 wherein the receptor support is paper.
Claim 23
Dependent Claim
17 words
A process according to claim 16 wherein the exposed photopolymerizable layer is charged electrostatically by corona discharge.
Claim 24
Dependent Claim
22 words
A process according to claim 16 wherein the electrostatically charged exposed image areas are toned by means of a liquid electrostatic toner.
Claim 25
Dependent Claim
22 words
A process according to claim 16 wherein the electrostatically charged exposed image areas are toned by means of a dry electrostatic toner.
Claim 26
Dependent Claim
22 words
A process according to claim 16 wherein steps (E), (F) and (G) are repeated to produce multiple copies with a single exposure.
Claim 27
Dependent Claim
32 words
A process according to claim 16 wherein the photopolymerizable layer of the photopolymerizable element consists essentially of a polymeric binder, an ethylenically unsaturated monomeric compound a photoinitiator, and a chain transfer agent.
Claim 28
Dependent Claim
14 words
A process according to claim 16 wherein the photoinitiator is a 2-o-substituted hexaarylbiimidazole compound.
Claim 29
Dependent Claim
11 words
A process according to claim 26 wherein the binder is poly(styrene/methylamethacrylate).
Claim 30
Dependent Claim
11 words
A process according to claim 26 wherein the binder is polymelthylmethacrylate.
Claim 31
Dependent Claim
58 words
A process according to claim 25 wherein the exposure is made through a right-reading halftone process-color separation negative film having its emulsion side in contact with the cover sheet of the photopolymerizable element, the charged element is toned with the corresponding process-color toner, the transferred toned image providing one layer of a 4-color overlay or surprint color proof.
Claim 32
Dependent Claim
45 words
A process according to claim 29 wherein a 4-color surprint on paper is prepared by repeating the steps 4 times using a different photopolymerizable element each time with a yellow, magenta, cyan and black right-reading process-color separation halftone negative film with the corresponding process-color toner.
Claim 33
Dependent Claim
22 words
A process according to claim 1 wherein the conductive substrate to which the exposed photopolymerizable layer is laminated bears a photopolymerizable layer.
Claim 34
Dependent Claim
22 words
A process according to claim 16 wherein the conductive substrate to which the exposed photopolymerizable layer is laminated bears a photopolymerizable layer.
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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) | 1993-01-29 | 1993-07-31 | 1994-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-29 | 1997-07-31 | 1998-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-29 | 2001-07-31 | 2002-01-30 | $7700.00 | Window Closed / Lapsed |