US4356251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer photosensitive element with solvent-soluble layer
Assignee: EIDP Inc
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Filing: 1980-08-04
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Granted: 1982-10-26
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Expires: 2000-08-04
Abstract
Abstract An improved photosensitive element for producing reverse solvent developed images comprising a cover sheet, a photoadherent layer, and a solvent-soluble, non-tonable contiguous layer for photomechanical applications.
Inventors
- 👤 Abraham B. Cohen
- 👤 Roxy Fan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:27
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/34; G03F3/00; G03F3/10; G03F3/106
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
159 words
A peel apart photosensitive element comprising in order from top to bottom, (1) a strippable cover sheet, (2) a sole dry photoadherent layer comprising a material with ethylenically unsaturated or benzophenone type groups, (3) a solvent-soluble, nontonable, polymeric, nonphotosensitive contiguous layer, and (4) a sheet support, the exposed areas of said photoadherent layer, after imagewise exposure of said element through the cover sheet (1) to actinic radiation, having greater adhesion to said contiguous layer than to said cover sheet and are not removable with said cover sheet and the unexposed areas of said photoadherent layer having greater adhesion to said cover sheet than to said contiguous layer and are removable with said cover sheet whereby after stripping the cover sheet (1) leaving an unhardened positive image on the cover sheet and an image of uncovered contiguous layer on the element, said exposed areas of the photoadherent layer being insoluble under a condition under which said contiguous layer is solvent-soluble.
Claim 2
Dependent Claim
159 words
A peel apart photosensitive element comprising in order from top to bottom, (1) a strippable cover sheet, (2) a sole dry photoadherent layer comprising a material with ethylenically unsaturated or benzophenone type groups, (3) a solvent-soluble, nontonable, polymeric, nonphotosensitive contiguous layer, and (4) a sheet support, the exposed areas of said photoadherent layer, after imagewise exposure of said element through the cover sheet (1) to actinic radiation, having greater adhesion to said contiguous layer than to said cover sheet and are not removable with said cover sheet and the unexposed areas of said photoadherent layer having greater adhesion to said cover sheet than to said contiguous layer and are removable with said cover sheet whereby after stripping the cover sheet (1) leaving an unhardened positive image on the cover sheet and an image of uncovered contiguous layer on the element, said exposed areas of the photoadherent layer being insoluble under a condition under which said contiguous layer is solvent-soluble.
Claim 3
Dependent Claim
14 words
An element according to claim 1 wherein said contiguous layer contains an added colorant.
Claim 4
Dependent Claim
21 words
An element according to claim 1 wherein said strippable cover sheet is a polymeric film which is transparent to actinic radiation.
Claim 5
Dependent Claim
16 words
An element according to claim 3 wherein said strippable cover sheet is a polyethylene terephthalate film.
Claim 6
Dependent Claim
23 words
An element according to claim 1 wherein said contiguous layer is comprised of a polymeric material that is soluble in an aqueous solution.
Claim 7
Dependent Claim
14 words
An element according to claim 1 wherein said photoadherent layer contains an added colorant.
Claim 8
Dependent Claim
19 words
An element according to claim 2 wherein said colored contiguous layer has an optical density of at least 3.0.
Claim 9
Dependent Claim
21 words
An element according to claim 1 containing an auxiliary layer interposed between the contiguous layer (3) and the sheet support (4).
Claim 10
Dependent Claim
14 words
An element according to claim 8 wherein the auxiliary layer is a release layer.
Claim 11
Dependent Claim
14 words
An element according to claim 8 wherein the auxiliary layer is an anchoring layer.
Claim 12
Dependent Claim
12 words
An element according to claim 8 wherein the auxiliary layer is thermoplastic.
Claim 13
Dependent Claim
24 words
An element according to claim 1 wherein the sheet support (4) has a metal surface in contact with the surface of said contiguous layer.
Claim 14
Dependent Claim
12 words
An element according to claim 12 wherein the metal surface is copper.
Claim 15
Dependent Claim
13 words
An element according to claim 1 wherein the sheet support (4) is transparent.
Claim 16
Dependent Claim
15 words
An element according to claim 1 wherein the sheet support (4) is a polymeric film.
Claim 17
Dependent Claim
13 words
An element according to claim 15 wherein the polymeric film is polyethylene terephthalate.
Claim 18
Dependent Claim
15 words
An element according to claim 1 wherein the sheet support (4) contains an added colorant.
Claim 19
Dependent Claim
28 words
An element according to claim 17 wherein the colored sheet support has an optical density of at least 3 over a portion of the visible or actinic spectrum.
References Cited (Backward Citations)
US3241973A
Cited
US3375112A
Cited
US3359107A
Cited
US3615435A
Cited
US3891441A
Cited
US3754920A
Cited
US3770438A
Cited
NL7413916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |