Patent US3649268A successfully refreshed from Google Patents.
US3649268A
Expired / Lapsed
US
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Process for forming images by photohardening and applying a colorant
Assignee: EIDP Inc
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Filing: 1969-02-05
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Granted: 1972-03-14
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Expires: 1989-02-05
Abstract
Abstract An image reproduction process in which an element having a removable support and a photohardenable layer is (1) laminated to a suitable receptor, (2) imagewise exposed through the support to actinic radiation which selectively raises the stick temperature of those areas receiving the radiation, (3) the support stripped from the layer, and (4) the outer surface of the layer treated (e.g., dusted) with material which adheres only to the underexposed areas of the layer to read-out the image. By repeating the laminating, exposing with separate color separation records, stripping and treating steps in sequence, a multicolor image can be obtained. The receptor may be plastic, metal, ceramic, glass, etc. The process is useful for color proofing.
Inventors
- 👤 Victor F H Chu
- 👤 Abraham B Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:52
CPC Classifications
G; G03; G03F; G03F3/00; G03F3/10; G03F3/106; Y; Y10; Y10S; Y10S148/00; Y10S148/106; Y10S148/15
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
42 words
A process according to claim 1, wherein said photohardenable layer is a photopolymerizable layer containing at least one free radical initiated, chain propagating, addition polymerizable compound containing at least one terminal ethylenic group, and an addition polymerization initiator activatable by actinic radiation.
Claim 2
Dependent Claim
22 words
exposing said layer imagewise through said support to actinic radiation to selectively raise the stick temperature of those areas receiving the radiation;
Claim 3
Dependent Claim
17 words
removing said support without transfer thereto of either exposed or underexposed areas of the photohardenable layer; and
Claim 4
Dependent Claim
19 words
A process according to claim 2, wherein each of said photopolymerizable layers contains a compatible macromolecular organic polymer binder.
Claim 5
Dependent Claim
23 words
A process according to claim 2, wherein said polymerizable compound is a polyoxyethyltrimethylolpropane triacrylate or trimethacrylate of average molecular weight 450 - 40,000.
Claim 6
Dependent Claim
57 words
applying to the surface of the layer colorant material which adheres only to the underexposed areas to produce a colored image, and repeating said steps of laminating, exposing, removing, and applying one or more times, each succeeding photohardenable element having its photohardenable layer contiguous to the exposed and colored surface of the last previously laminated photOhardenable layer.
Claim 7
Dependent Claim
16 words
A process according to claim 2, wherein said polymerizable compound is a polyoxyethylpentaerythritol tetraacrylate or tetramethacrylate.
Claim 8
Dependent Claim
28 words
A process according to claim 1, wherein each exposed and colored photohardenable layer is nonimagewise exposed to thermal or actinic hardening prior to laminating the succeeding photohardenable layer.
Claim 9
Dependent Claim
39 words
A process according to claim 1, wherein at least one of said exposing steps comprises nonimagewise exposure to thermal or actinic hardening, and the step of applying colorant material is omitted with respect to the nonimagewise exposed photohardenable layer.
Claim 10
Dependent Claim
16 words
A process according to claim 7, wherein said nonimagewise exposed photohardenable layer is the final layer.
Claim 11
Dependent Claim
35 words
A process according to claim 1, the exposure and colorant materials for at least 2 of said layers corresponding to different color regions of the visible spectrum, including black, whereby a multicolor image is produced.
Claim 12
Dependent Claim
22 words
A process according to claim 1, wherein the last exposed and colored photohardenable layer is nonimagewise exposed to thermal or actinic hardening.
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) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |