US4311784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer photosensitive solvent-processable litho element
Assignee: EIDP Inc
•
Filing: 1980-04-21
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Granted: 1982-01-19
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Expires: 2000-04-21
Abstract
Abstract An improved photosensitive litho element comprises, in order, a support, a non-photosensitive solvent-soluble contiguous layer having an optical density of at least 3.0 in the visible region of the spectrum and a maximum thickness of 0.015 mm, and a solvent-processable photosensitive layer. Dot-etchable contact litho negatives and positives are provided.
Inventors
- 👤 Roxy N. Fan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:39
CPC Classifications
G; G03; G03F; G03F1/00; G03F1/54; G03F1/56
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
88 words
In a photosensitive dot-etchable litho element having a sheet support and a solvent-processable non-silver halide photosensitive layer, the exposed areas of the solvent-processable photosensitive layer, after imagewise exposure of the element to actinic radiation, being solvent-soluble, the improvement wherein between the support and the photosensitive layer and contiguous thereto is present a non-photosensitive, solvent-soluble dye or pigment-containing layer having an optical density of at least 3.0 in the visible region of the spectrum and a maximum thickness of 0.015 mm, said contiguous layer being adhered to the support.
Claim 2
Dependent Claim
88 words
In a photosensitive dot-etchable litho element having a sheet support and a solvent-processable non-silver halide photosensitive layer, the exposed areas of the solvent-processable photosensitive layer, after imagewise exposure of the element to actinic radiation, being solvent-soluble, the improvement wherein between the support and the photosensitive layer and contiguous thereto is present a non-photosensitive, solvent-soluble dye or pigment-containing layer having an optical density of at least 3.0 in the visible region of the spectrum and a maximum thickness of 0.015 mm, said contiguous layer being adhered to the support.
Claim 3
Dependent Claim
12 words
An element according to claim 1 wherein the photosensitive layer is photodesensitizable.
Claim 4
Dependent Claim
12 words
An element according to claim 1 wherein the photosensitive layer is photosolubilizable.
Claim 5
Dependent Claim
12 words
An element according to claim 1 wherein the photosensitive layer is aqueous-processable.
Claim 6
Dependent Claim
19 words
An element according to claim 1 wherein the contiguous layer is soluble in a solvent for the photosensitive layer.
Claim 7
Dependent Claim
16 words
An element according to claim 1 wherein the contiguous layer is soluble in an aqueous solution.
Claim 8
Dependent Claim
18 words
An element according to claim 1 wherein the optical density of the contiguous layer is at least 4.0.
Claim 9
Dependent Claim
19 words
An element according to claim 1 wherein the thickness of the contiguous layer ranges from 0.0011 to 0.015 mm.
Claim 10
Dependent Claim
16 words
An element according to claim 1 wherein the thickness of the contiguous layer is 0.010 mm.
Claim 11
Dependent Claim
14 words
An element according to claim 1 wherein the support is a film sheet support.
Claim 12
Dependent Claim
12 words
An element according to claim 1 wherein the contiguous layer is non-elastomeric.
References Cited (Backward Citations)
US2791504A
Cited
BE778333A
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NL7413916A
Cited
US3879920A
Cited
US4126466A
Cited
BE842534A
Cited
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Cited
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Cited
US4123272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-18 | 1985-07-20 | 1986-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-18 | 1989-07-20 | 1990-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-18 | 1993-07-20 | 1994-01-19 | $7700.00 | Window Closed / Lapsed |