US3639123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-transfer process for photohardenable images
Assignee: EIDP Inc
•
Filing: 1969-10-13
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Granted: 1972-02-01
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Expires: 1989-10-13
Abstract
Abstract An image-forming process comprises, in order, (1) imagewise exposing a photohardenable layer to actinic radiation to harden the layer throughout the exposed areas while leaving the underexposed areas unhardened, (2) transferring the underexposed material at a temperature between the softening point of the exposed and underexposed areas to a receptor surface, and (3) heating the exposed areas to a temperature above their softening point and transferring said areas to a second receptor surface. The invention provides both positive- and negative-working processes.
Inventors
- 👤 Russell Houston Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:30
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/34; Y; Y10; Y10S; Y10S156/00; Y10S156/918; Y10S156/919; Y10S156/922; Y10T; Y10T156/00; Y10T156/11
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
29 words
A process according to claim 1, wherein the photohardenable layer is a photopolymerizable layer and contains at least one addition polymerizable ethylenically unsaturated compound and an addition polymerization initiator.
Claim 2
Dependent Claim
15 words
A process according to claim 2, wherein the unsaturated compound is a polyoxyethylated trimethylolpropane triacrylate.
Claim 3
Dependent Claim
23 words
A process according to claim 2, wherein the unsaturated compound is a polyoxyethylated trimethylolpropane triacrylate, and the layer contains a methyl methacrylate polymer.
Claim 4
Dependent Claim
17 words
A process according to claim 1, wherein said support is a thin flexible macromolecular organic polymer film.
Claim 5
Dependent Claim
30 words
A process according to claim 1, wherein between step (a) and step (b) the photohardenable solid layer is toned with a colorant adherent to both the exposed and unexposed areas.
Claim 6
Dependent Claim
19 words
A process according to claim 1 which comprises further hardening the transferred layers by exposing them to actinic radiation.
Claim 7
Dependent Claim
64 words
An image-forming process according to claim 1, wherein said element has a receptor sheet laminated to the photohardenable layer, at least the support or the receptor sheet being transparent to actinic radiation, and step (b) comprises removing the receptor sheet at a temperature between the softening point of the exposed and underexposed areas with unhardened underexposed areas of the layer adherent to said sheet.
Claim 8
Dependent Claim
25 words
A process according to claim 8, wherein said hardened exposed areas of said layer are toned with colorant before transfer to said second receptor surface.
References Cited (Backward Citations)
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US3380831A
Cited
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US3448089A
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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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |