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Patent US4358530A successfully refreshed from Google Patents.
US4358530A
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US
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Photosensitive lithographic printing plate precursor and a method for preparing a printing plate therefrom
Assignee: Fujifilm Holdings Corp
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Filing: 1980-10-02
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Granted: 1982-11-09
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Expires: 2000-10-02
Abstract
Abstract A photosensitive lithographic printing plate precursor and a method for the preparation of a lithographic printing plate is described, said precursor comprising a support, a non-silver photosensitive layer and a photographic silver halide emulsion coating, and exhibiting photographic camera speed and a printing durability equivalent to the conventional type presensitized plate due to the underlying non-silver photosensitive layer; the silver halide emulsion coating contains a compound represented by the formual (I) R.sup.1 NHNHCOR.sup.2 (I) in which R 1 represents an aryl group and R 2 represents hydrogen, an aryl group, or an aliphatic group.
Inventors
- 👤 Keisuke Shiba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:43
CPC Classifications
C; C07; C07C; C07C243/00; C07C243/24; C07C243/38; G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043; G03C1/06; G03C1/08; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/095; G03F7/0952; Y; Y10; Y10S; Y10S430/00; Y10S430/15
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
80 words
A photosensitive lithographic printing plate precursor comprising, in sequence, a support having a hydrophilic surface, a non-silver photosensitive layer capable of producing an oleophilic image, and a photographic silver halide emulsion coating, wherein said silver halide emulsion coating comprises silver halide grains with an average diameter not exceeding 0.7 micron and a compound represented by the formula (I) R.sup.1 NHNHCOR.sup.2 (I) wherein R 1 represents an aryl group and R 2 represents hydrogen, an aryl group, or an aliphatic group.
Claim 2
Dependent Claim
80 words
A photosensitive lithographic printing plate precursor comprising, in sequence, a support having a hydrophilic surface, a non-silver photosensitive layer capable of producing an oleophilic image, and a photographic silver halide emulsion coating, wherein said silver halide emulsion coating comprises silver halide grains with an average diameter not exceeding 0.7 micron and a compound represented by the formula (I) R.sup.1 NHNHCOR.sup.2 (I) wherein R 1 represents an aryl group and R 2 represents hydrogen, an aryl group, or an aliphatic group.
Claim 3
Dependent Claim
65 words
A photosensitive lithographic printing plate precursor as in claim 1 wherein said silver halide emulsion coating additionally comprises a poly(alkylene oxide) or a derivative thereof having a molecular weight of at least 600, and the coating coverage of said silver halide emulsion coating is from 1 to 10 g/m 2 , and the silver density is from 9 mmol/m 2 to 33 mmol/m 2 .
Claim 4
Independent Claim
209 words
A method for preparing a lithographic printing plate comprising (a) imagewise exposing a photosensitive lithographic printing plate precursor comprising, in sequence, a support having a hydrophilic surface, a non-silver photosensitive layer capable of forming an oleophilic image, and a photographic silver halide emulsion coating, wherein said silver halide emulsion coating comprises silver halide grains with an average grain size not exceeding 0.7 micron and a compound represented by the formula (I) R.sup.1 NHNHCOR.sup.2 (I) wherein R 1 represents an aryl group, and R 2 represents hydrogen, an aryl group or an aliphatic group together with a poly(alkylene oxide) or a derivative thereof having a molecular weight of at least 600, (b) subjecting said exposed plate to a first development with a first developer containing a dihydroxybenzene reducing agent and free sulfite ions having a concentration of at least 0.18 mol/l, (c) fixing the developed photographic coating, (d) uniformly exposing the thus-processed plate to radiation to which said non-silver photosensitive layer is sensitive, (e) washing to remove said silver halide emulsion coating, and (f) processing the plate with a second developer capable of developing said non-silver photosensitive layer to remove either the exposed areas or unexposed area with the radiation of said non-silver photosensitive layer to form an oleophilic image.
Claim 5
Independent Claim
209 words
A method for preparing a lithographic printing plate comprising (a) imagewise exposing a photosensitive lithographic printing plate precursor comprising, in sequence, a support having a hydrophilic surface, a non-silver photosensitive layer capable of forming an oleophilic image, and a photographic silver halide emulsion coating, wherein said silver halide emulsion coating comprises silver halide grains with an average grain size not exceeding 0.7 micron and a compound represented by the formula (I) R.sup.1 NHNHCOR.sup.2 (I) wherein R 1 represents an aryl group, and R 2 represents hydrogen, an aryl group or an aliphatic group together with a poly(alkylene oxide) or a derivative thereof having a molecular weight of at least 600, (b) subjecting said exposed plate to a first development with a first developer containing a dihydroxybenzene reducing agent and free sulfite ions having a concentration of at least 0.18 mol/l, (c) fixing the developed photographic coating, (d) uniformly exposing the thus-processed plate to radiation to which said non-silver photosensitive layer is sensitive, (e) washing to remove said silver halide emulsion coating, and (f) processing the plate with a second developer capable of developing said non-silver photosensitive layer to remove either the exposed areas or unexposed area with the radiation of said non-silver photosensitive layer to form an oleophilic image.
Claim 6
Dependent Claim
22 words
A photosensitive lithographic printing plate precursor as in claim 1 or 2 wherein the average grain size does not exceed 0.5 micron.
Claim 7
Dependent Claim
22 words
A method for preparing a lithographic printing plate as in claim 3 wherein the average grain size does not exceed 0.5 micron.
Claim 8
Dependent Claim
27 words
A photosensitive lithographic printing plate precursor as in claim 1 or 2 wherein the average grain size is within the range of from 0.1 to 0.4 micron.
Claim 9
Dependent Claim
27 words
A method for preparing a lithographic printing plate as in claim 3 wherein the average grain size is within the range of from 0.1 to 0.4 micron.
Claim 10
Dependent Claim
60 words
A photosensitive lithographic printing plate precursor as in claim 1 or 2 wherein the compound according to formula (I) is represented by the formula (Ia) R.sup.1 NHNHCOR.sup.12 (Ia) wherein R 1 has the same meaning as in formula (I), and R 12 represents hydrogen, a methyl group, an unsubstituted phenyl group, or a phenyl group having an electron attractive substituent.
Claim 11
Dependent Claim
60 words
A method for preparing a lithographic printing plate as in claim 3 wherein the compound according to formula (I) is represented by the formula (Ia) R.sup.1 NHNHCOR.sup.12 (Ia) wherein R 1 has the same meaning as in formula (I), and R 12 represents hydrogen, a methyl group, an unsubstituted phenyl group, or a phenyl group having an electron attractive substituent.
Claim 12
Dependent Claim
35 words
A photosensitive lithographic printing plate precursor as in claim 8 wherein the compound represented by formula (I) is represented by the formula (Ib) R.sup.11 NHNHCHO (Ib) wherein R 11 represents unsubstituted phenyl, p-tolyl or m-tolyl.
Claim 13
Dependent Claim
37 words
A method for preparing a lithographic printing plate as in claim 9 wherein the compound represented by formula (I) is represented by the formula (Ib) R.sup.11 NHNHCHO (Ib) wherein R 11 represents unsubstituted phenyl, p-tolyl or m-tolyl.
Claim 14
Dependent Claim
38 words
A photosensitive lithographic printing plate precursor as in claim 1 or 2 wherein the compound represented by formula (I) is present in the silver halide emulsion at a density of from 10 -4 to 10 -1 mol/mol Ag.
Claim 15
Dependent Claim
38 words
A method for preparing a lithographic printing plate as in claim 3 wherein the compound represented by formula (I) is present in the silver halide emulsion at a density of from 10 -4 to 10 -1 mol/mol Ag.
Claim 16
Dependent Claim
38 words
A photosensitive lithographic printing plate precursor as in claim 1 or 2 wherein the compound represented by formula (I) is present in the silver halide emulsion at a density of from 10 -3 to 5×10 -2 mol/mol Ag.
Claim 17
Dependent Claim
38 words
A method for preparing a lithographic printing plate as in claim 3 wherein the compound represented by formula (I) is present in the silver halide emulsion at a density of from 10 -3 to 5×10 -2 mol/mol Ag.
Claim 18
Dependent Claim
38 words
A photosensitive lithographic printing plate precursor as in claim 1 or 2 wherein the compound represented by formula (I) is present in the silver halide emulsion at a density of from 5×10 -3 to 5×10 -2 mol/mol Ag.
Claim 19
Dependent Claim
38 words
A method for preparing a lithographic printing plate as in claim 3 wherein the compound represented by formula (I) is present in the silver halide emulsion at a density of from 5×10 -3 to 5×10 -2 mol/mol Ag.
Claim 20
Independent Claim
173 words
A method for preparing a lithographic printing plate comprising (a) imagewise exposing a photosensitive lithographic printing plate precursor comprising, in sequence, a support having a hydrophilic surface, a non-silver photosensitive layer capable of forming an oleophilic image, and a photographic silver halide emulsion coating, wherein said silver halide emulsion coating comprises silver halide grains with an average grain size not exceeding 0.7 micron, (b) subjecting said exposed plate to a first development with a developer containing a compound represented by the formula (I) R.sup.1 NHNHCOR.sup.2 (I) wherein R 1 represents an aryl group, and R 2 represents hydrogen, an aryl group or an aliphatic group, a dihydroxybenzene reducing agent, and free sulfite ions having a concentration of at least 0.18 mol/l., (c) fixing the developed photographic coating, (d) uniformly exposing the thus-processed plate to radiation to which said non-silver photosensitive layer is sensitive, (e) washing to remove said silver halide emulsion coating, and (f) processing the plate with a second developer capable of developing said non-silver photosensitive layer to form an oleophilic image.
Claim 21
Independent Claim
173 words
A method for preparing a lithographic printing plate comprising (a) imagewise exposing a photosensitive lithographic printing plate precursor comprising, in sequence, a support having a hydrophilic surface, a non-silver photosensitive layer capable of forming an oleophilic image, and a photographic silver halide emulsion coating, wherein said silver halide emulsion coating comprises silver halide grains with an average grain size not exceeding 0.7 micron, (b) subjecting said exposed plate to a first development with a developer containing a compound represented by the formula (I) R.sup.1 NHNHCOR.sup.2 (I) wherein R 1 represents an aryl group, and R 2 represents hydrogen, an aryl group or an aliphatic group, a dihydroxybenzene reducing agent, and free sulfite ions having a concentration of at least 0.18 mol/l., (c) fixing the developed photographic coating, (d) uniformly exposing the thus-processed plate to radiation to which said non-silver photosensitive layer is sensitive, (e) washing to remove said silver halide emulsion coating, and (f) processing the plate with a second developer capable of developing said non-silver photosensitive layer to form an oleophilic image.
Claim 22
Dependent Claim
22 words
A photosensitive lithographic printing plate precursor as in claim 2 wherein said poly(alkylene oxide) contains from 14 to 100 alkylene oxide units.
Claim 23
Dependent Claim
27 words
A photosensitive lithographic printing plate precursor as in claim 2 wherein the concentration of poly(alkylene oxide) compound is from 5×10 -4 to 5 g/mol of silver halide.
Claim 24
Dependent Claim
27 words
A photosensitive lithographic printing plate precursor as in claim 2 wherein the concentration of poly(alkylene oxide) compound is from 1×10 -3 to 1 g/mol of silver halide.
Claim 25
Dependent Claim
36 words
A photosensitive lithographic printing plate precursor as in claim 1 or 2 wherein about 90% by number of the total number of silver halide grains fall within a range of ±40% of the average grain size.
Claim 26
Dependent Claim
34 words
A photosensitive lithographic printing plate precursor as in claim 4 wherein about 90% by number of the total number of silver halide grains fall within a range of ±40% of the average grain size.
Claim 27
Dependent Claim
34 words
A photosensitive lithographic printing plate precursor as in claim 6 wherein about 90% by number of the total number of silver halide grains fall within a range of ±40% of the average grain size.
Claim 28
Dependent Claim
24 words
A photosensitive lithographic printing plate precursor as in claim 2 wherein the silver density is from 12 mmol/m 2 to 20 mmol/m 2 .
Claim 29
Dependent Claim
25 words
A method for preparing a lithographic printing plate as in claim 3 wherein the free sulfite ions have a concentration of at least 0.25 mol/l.
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) | 1985-11-08 | 1986-05-10 | 1986-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-08 | 1990-05-10 | 1990-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-08 | 1994-05-10 | 1994-11-09 | $7700.00 | Window Closed / Lapsed |