US4247619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Negative-working multilayer photosensitive tonable element
Assignee: EIDP Inc
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Filing: 1979-12-20
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Granted: 1981-01-27
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Expires: 1999-12-20
Abstract
Abstract An improved peel apart photosensitive element comprises a strippable cover sheet, a photoadherent layer, and a tacky, nonphotosensitive contiguous layer receptive to colorant or particulate material, and a support. The element is useful in applications such as color proofing. Such elements are capable of producing reverse toned or colored images as well as duplicate colored images with greatly improved tonal range and image fidelity.
Inventors
- 👤 Abraham B. Cohen
- 👤 Roxy N. Fan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:02
CPC Classifications
G; G03; G03F; G03F3/00; G03F3/10; G03F3/103; G03F7/00; G03F7/26; G03F7/34
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
144 words
A peel apart photosensitive element comprising in order from top to bottom, (1) a strippable cover sheet comprised of a polymeric film which is transparent to actinic radiation, (2) a photoadherent layer comprising a photohardenable material with ethylenically unsaturated or benzophenone type groups, and (3) a tacky, nonphotosensitive organic contiguous layer which is tonable by embedding of particulate material, and (4) a sheet support, the exposed areas (5) of said photoadherent layer, after imagewise exposure of said element to actinic radiation, having greater adhesion to said cover sheet than to said contiguous layer, and are removable with said cover sheet, and the unexposed areas (6) of said photoadherent layer having greater adhesion to said contiguous layer than to said cover sheet and are not removable with said cover sheet, said photoadherent layer being nontonable under a condition under which the contiguous layer is tonable.
Claim 2
Dependent Claim
144 words
A peel apart photosensitive element comprising in order from top to bottom, (1) a strippable cover sheet comprised of a polymeric film which is transparent to actinic radiation, (2) a photoadherent layer comprising a photohardenable material with ethylenically unsaturated or benzophenone type groups, and (3) a tacky, nonphotosensitive organic contiguous layer which is tonable by embedding of particulate material, and (4) a sheet support, the exposed areas (5) of said photoadherent layer, after imagewise exposure of said element to actinic radiation, having greater adhesion to said cover sheet than to said contiguous layer, and are removable with said cover sheet, and the unexposed areas (6) of said photoadherent layer having greater adhesion to said contiguous layer than to said cover sheet and are not removable with said cover sheet, said photoadherent layer being nontonable under a condition under which the contiguous layer is tonable.
Claim 3
Dependent Claim
13 words
An element according to claim 1 wherein said contiguous layer (3) is colorless.
Claim 4
Dependent Claim
28 words
An element according to claim 1 wherein said photoadherent layer (2) is comprised of an ethylenically unsaturated photohardenable material selected from photopolymerizable, photocrosslinkable, photodimerizable compositions and combinations thereof.
Claim 5
Dependent Claim
17 words
An element according to claim 1 wherein said contiguous layer (3) is comprised of a elastomeric material.
Claim 6
Dependent Claim
17 words
An element according to claim 4 wherein said elastomeric material is selected from butadiene and isoprene polymers.
Claim 7
Dependent Claim
26 words
An element according to claim 1 wherein said strippable cover sheet (1) is a polymeric film which is surface treated by electrostatic discharge or flame treatment.
Claim 8
Dependent Claim
15 words
An element according to claim 1 wherein said photoadherent layer (2) is a colorless layer.
Claim 9
Dependent Claim
37 words
An element according to claim 1 wherein the sheet support (4) is contiguous to said tacky layer (3) and is taken from the group consisting of a film support and a film support bearing an auxiliary layer.
Claim 10
Dependent Claim
55 words
An element according to claim 3 wherein said photohardenable layer (2) is a nontacky photopolymerizable layer comprised of a macromolecular organic polymeric binder, an organic compound having at least one terminal ethylenic group capable of free radical initiated, chain propagated addition polymerization, and a free radical generating addition polymerization photoinitiating system activatable by actinic radiation.
Claim 11
Dependent Claim
16 words
An element according to claim 1 wherein said cover sheet (1) is a polyethylene terephthalate film.
Claim 12
Dependent Claim
15 words
An element according to claim 1 wherein the contiguous layer (3) contains an added colorant.
Claim 13
Dependent Claim
28 words
An element according to claim 11 wherein the colored contiguous layer has an optical density of at least 3 over a portion of the visible or actinic spectrum.
Claim 14
Dependent Claim
15 words
An element according to claim 1 wherein the photoadherent layer (2) contains an added colorant.
Claim 15
Dependent Claim
16 words
An element according to claim 1 wherein the sheet support (4) is transparent to actinic radiation.
Claim 16
Dependent Claim
15 words
An element according to claim 1 wherein the sheet support (4) contains an added colorant.
Claim 17
Dependent Claim
28 words
An element according to claim 15 wherein the colored sheet support has an optical density of at least 3 over a portion of the visible or actinic spectrum.
Claim 18
Dependent Claim
22 words
An element according to claim 8 wherein the auxiliary layer is interposed between the contiguous layer (3) and the sheet support (4).
Claim 19
Dependent Claim
14 words
An element according to claim 17 wherein the auxiliary layer is a release layer.
Claim 20
Dependent Claim
14 words
An element according to claim 17 wherein the auxiliary layer is an anchoring layer.
Claim 21
Dependent Claim
12 words
An element according to claim 17 wherein the auxiliary layer is thermoplastic.
Claim 22
Dependent Claim
22 words
An element according to claim 11 wherein the sheet support (4) has a metal surface in contact with the contiguous layer (3).
Claim 23
Dependent Claim
12 words
An element according to claim 21 wherein the metal surface is copper.
Claim 24
Dependent Claim
38 words
An element according to claim 1, after imagewise exposure, stripping of the cover sheet (1) and toning, comprises a contiguous layer (3) bearing on its surface, image areas (6) of polymeric material and complementary toned image areas (7).
Claim 25
Dependent Claim
28 words
A multilayer element comprising a plurality of elements of claim 23 wherein the contiguous layer (3) of an element is adjacent to the imagebearing surface of another element.
Claim 26
Dependent Claim
23 words
A multicolor element comprising a multilayer element of claim 24 wherein images of at least two of the elements are of different colors.
Claim 27
Dependent Claim
28 words
An electrically conductive element comprising an element of claim 23 wherein the complementary toned image areas (7) comprise areas that have been toned with metal powder and plated.
Claim 28
Dependent Claim
25 words
An element according to claim 26 wherein the complementary toned image areas comprise areas (7) that have been toned with copper powder and electrolessly plated.
Claim 29
Dependent Claim
34 words
A multilayer electrically conductive element comprising a plurality of elements of claim 26 wherein the contiguous layer (3) of an element is in surface to surface contact with the imagebearing surface of another element.
Claim 30
Dependent Claim
51 words
An element according to claim 1 wherein, after imagewise exposure and stripping the cover sheet (1), the bared areas (7) of said contiguous layer (3) are receptive to particulate toner, and the unexposed areas (6) of said photoadherent layer (2) remaining on the contiguous layer (3) are nonreceptive to particulate toner.
Claim 31
Dependent Claim
51 words
An element according to claim 9 wherein, after imagewise exposure and stripping the cover sheet (1), the bared areas (7) of said contiguous layer (3) are receptive to particulate toner, and the unexposed areas (6) of said photoadherent layer (2) remaining on the contiguous layer (3) are nonreceptive to particulate toner.
Claim 32
Dependent Claim
36 words
An element according to claim 1 wherein the nontonable photoadherent layer is, or can be rendered, substantially more resistant to embedding by particulate material than the tacky contiguous layer into which particulate material can be embedded.
Claim 33
Dependent Claim
58 words
An element according to claim 1 wherein the peel force required to remove the cover sheet (1) with exposed areas (5) thereon from the contiguous layer (3) of the element is at least four times the peel force required to remove the cover sheet (1) from the unexposed areas (6) of the photoadherent layer (2) of the element.
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) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |