US3615435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photohardenable image reproduction element with integral pigmented layer and process for use
Assignee: EIDP Inc
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Filing: 1968-11-12
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Granted: 1971-10-26
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Expires: 1988-11-12
Abstract
Abstract A photohardenable image reproduction element comprising, in order, a support, a layer of clear photohardenable material, and a layer of colored photohardenable material. On imagewise exposure, a latent image is produced comprising selectively photohardened material in both layers. This image is developed by transferring the underexposed areas to a separate image receptive surface. The element may have additionally an integral receptor sheet of a material selected according to end use considerations. This element is developed by stripping apart the support and receptor sheets. Cohesive failure occurs in the underexposed areas of the clear photohardenable layer and adhesive failure at the image receptor-photohardened interface of the exposed areas. Sharply defined positive and negative images with low stain are simultaneously produced on the receptor sheet and support respectively.
Inventors
- 👤 Victor Fu-Hua Chu
- 👤 Abraham Bernard Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:07
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/095; G03F7/0955; G03F7/26; G03F7/34
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
17 words
An element according to claim 1, wherein said contiguous layer is no thicker than said clear layer.
Claim 2
Dependent Claim
81 words
transferring unhardened material from unexposed image areas of both layers to a receptor sheet by pressing the sheet into contact with the surface of the contiguous layer and stripping apart the support and receptor sheet, whereby cohesive failure occurs in the unexposed areas of said clear layer without adherence at the image receptor-photohardened interface of the exposed areas, and thereby producing a colored, hardened, negative image adherent to said support and a colored, unhardened positive image adherent to the receptor sheet.
Claim 3
Dependent Claim
20 words
an unexposed layer of clear photohardenable material which exhibits an increase in stick temperature upon exposure to actinic radiation, and
Claim 4
Dependent Claim
11 words
removing unhardened material from unexposed image areas from both photohardenable layers;
Claim 5
Dependent Claim
17 words
applying a separate clear photohardenable layer to the surface of exposed photohardenable layer on the adherent support;
Claim 6
Dependent Claim
11 words
An element according to claim 1, wherein said support is transparent.
Claim 7
Dependent Claim
10 words
an unexposed contiguous layer of photohardenable material containing a colorant.
Claim 8
Dependent Claim
20 words
An element according to claim 1, where the photohardenable layers contain an addition photopolymerizable material and said colorant is particulate.
Claim 9
Dependent Claim
10 words
pressing into said separate clear layer a different particulate colorant;
Claim 10
Dependent Claim
6 words
exposing the resulting layer, imagewise, and
Claim 11
Dependent Claim
19 words
An element according to claim 1, where the photohardenable composition of both layers except for the colorant is identical.
Claim 12
Dependent Claim
7 words
are repeated to reveal a 3-color image.
Claim 13
Dependent Claim
13 words
removing the unhardened areas of the resulting layer to reveal a 2-color image.
Claim 14
Dependent Claim
17 words
An element according to claim 1, where said contiguous layer is covered by an oxygen-impermeable cover sheet.
Claim 15
Dependent Claim
18 words
An element according to claim 6, where both said support and said cover sheet comprise a polyester film.
Claim 16
Dependent Claim
12 words
An element according to claim 6, where said colorant is a pigment.
Claim 17
Dependent Claim
4 words
A process which comprises:
Claim 18
Dependent Claim
4 words
A process which comprises:
Claim 19
Dependent Claim
14 words
A process according to claim 10, wherein each photohardenable layer is a photopolymerizable layer.
Claim 20
Dependent Claim
11 words
A process according to claim 10, wherein steps 3., 4., and
Claim 21
Dependent Claim
14 words
A process according tO claim 12, wherein each photohardenable layer is a photopolymerizable layer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |