Patent US4282760A successfully refreshed from Google Patents.
US4297429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic material and diffusion transfer processing solution for making printing plates and method for making printing plates
Assignee: Mitsubishi Paper Mills Ltd
•
Filing: 1980-06-11
•
Granted: 1981-10-27
•
Expires: 2000-06-11
Abstract
Abstract Lithographic printing plates having high ink receptivity, suffuring no ink stains and having much improved printing endurance can be produced by silver complex diffusion transfer process from lithographic printing plate materials comprising a support having thereon at least both silver halide emulsion layer and physical development nuclei layer wherein the diffusion transfer processing is carried out in the presence of 2-mercaptobenzoic acid derivatives or, besides this 2-mercaptobenzoic acid derivatives, at least one compound selected from the group consisting of alkanolamines and cyclic imide compounds which may be contained in at least one layers of the lithographic printing plate materials and/or the diffusion transfer developing solutions.
Inventors
- 👤 Eiji Kanada
- 👤 Shoji Yamada
- 👤 Yasuo Tsubai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:49
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/24; G03C8/243; G03F; G03F7/00; G03F7/004; G03F7/06; G03F7/063; G03F7/066
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
84 words
Method for making a lithographic printing plate which utilizes the transfer silver as ink receptive portions which is formed by silver complex diffusion transfer process from a lithographic printing plate material which comprises a support having thereon at least both silver halide emulsion layer and physical development nuclei layer by imagewise-exposure of the silver halide emulsion layer and diffusion transfer development thereof with an alkaline processing solution, characterized in that diffusion transfer development processing is carried out in the presence of 2-mercaptobenzoic acid derivative.
Claim 2
Dependent Claim
84 words
Method for making a lithographic printing plate which utilizes the transfer silver as ink receptive portions which is formed by silver complex diffusion transfer process from a lithographic printing plate material which comprises a support having thereon at least both silver halide emulsion layer and physical development nuclei layer by imagewise-exposure of the silver halide emulsion layer and diffusion transfer development thereof with an alkaline processing solution, characterized in that diffusion transfer development processing is carried out in the presence of 2-mercaptobenzoic acid derivative.
Claim 3
Dependent Claim
86 words
Method for making a lithographic printing plate according to claim 1, wherein the diffusion transfer processing is carried out in the presence of the 2-mercaptobenzoic acid derivative and at least one compound selected from the group consisting of alkanolamine and cyclic imide compound having the following general formula: ##STR11## (wherein Z represents atoms of a series completing a 5- or 6-membered cyclic imide nucleus which comprises 1 to 3 nitrogen atoms and the remainder being carbon atoms and said atoms of a series may have substituent).
Claim 4
Dependent Claim
26 words
Method for making a lithographic printing plate according to claim 1 or 2, wherein the 2-mercaptobenzoic acid derivative is present in diffusion transfer developing (processing) solution.
Claim 5
Dependent Claim
29 words
Method for making a lithographic printing plate according to claim 1 or 2, wherein the 2-mercaptobenzoic acid derivative is present in constituting layer of the lithographic printing plate material.
Claim 6
Dependent Claim
22 words
Method for making a lithographic printing plate according to claim 2, wherein the alkanol amine is present in diffusion transfer developing solution.
Claim 7
Dependent Claim
23 words
Method for making a lithographic printing plate according to claim 2, wherein the cyclic imide compound is present in diffusion transfer developing solution.
Claim 8
Dependent Claim
27 words
Method for making a lithographic printing plate according to claim 2, wherein the cyclic imide compound is present in constituting layer of the lithographic printing plate material.
Claim 9
Dependent Claim
31 words
Method for making a lithographic printing plate according to claim 2, wherein the 2-mercaptobenzoic acid derivative, the alkanolamine and the cyclic imide compound are all present in diffusion transfer developing solution.
Claim 10
Dependent Claim
26 words
Method for making a lithographic printing plate according to claim 8, wherein content of the 2-mercaptobenzoic acid derivative is about 0.1 millimol/l to about 100 millimol/l.
Claim 11
Dependent Claim
30 words
Method for making a lithographic printing plate according to claim 4, wherein content of the 2-mercaptobenzoic acid derivative is about 10 -3 millimol/m 2 to about 10 millimol/m 2 .
Claim 12
Dependent Claim
24 words
Method for making a lithographic printing plate according to claim 8, wherein content of the alkanolamine is about 5 g/l to about 100 g/l.
Claim 13
Dependent Claim
26 words
Method for making a lithographic printing plate according to claim 8, wherein content of the cyclic imide compound is about 0.1 g/l to about 30 g/l.
Claim 14
Dependent Claim
29 words
Method for making a lithographic printing plate according to claim 7, wherein content of the cyclic imide compound is about 0.001 g/m 2 to about 1 g/m 2 .
Claim 15
Dependent Claim
38 words
Lithographic printing plate material which comprises a support having thereon at least both silver halide emulsion layer and physical development nuclei layer, characterized in that 2-mercaptobenzoic acid derivative is contained in at least one of the constituting layers.
Claim 16
Dependent Claim
38 words
Lithographic printing plate material which comprises a support having thereon at least both silver halide emulsion layer and physical development nuclei layer, characterized in that 2-mercaptobenzoic acid derivative is contained in at least one of the constituting layers.
Claim 17
Dependent Claim
66 words
Lithographic printing plate material according to claim 14, wherein at least constituting layer contains the 2-mercaptobenzoic acid derivative and cyclic imide compound having the following general formula: ##STR12## (wherein Z represents atoms of a series completing a 5- or 6-membered cyclic imide nucleus which comprises from 1 to 3 nitrogen atoms and the remainder being carbon atoms and said atoms of a series may have substituent).
Claim 18
Dependent Claim
29 words
Lithographic printing plate material according to claim 14 or 15, wherein content of the 2-mercaptobenzoic acid derivative is about 10 -3 millimol/m 2 to about 10 millimol/m 2 .
Claim 19
Dependent Claim
26 words
Lithographic printing plate material according to claim 14, wherein content of the cyclic imide compound is about 0.001 g/m 2 to about 1 g/m 2 .
Claim 20
Dependent Claim
12 words
Lithographic printing plates made by the method of claim 1 or 2.
Claim 21
Dependent Claim
43 words
A method according to claim 1 wherein the 2-mercaptobenzoic acid derivative has the formula ##STR13## where A is a halogen atom, an alkyl group, an alkoxy group, an amino group, an acylamino group, or a nitro group; and n is 0 to 4.
Claim 22
Dependent Claim
10 words
A method according to claim 19 where n is 0.
Claim 23
Dependent Claim
14 words
A method according to claim 19 where n is 1-2 and A is halogen.
Claim 24
Dependent Claim
14 words
A method according to claim 19 where n is 1 and A is alkyl.
Claim 25
Dependent Claim
14 words
A method according to claim 19 where n is 1 and A is alkoxy.
Claim 26
Dependent Claim
14 words
A method according to claim 19 where n is 1 and A is amino.
Claim 27
Dependent Claim
14 words
A method according to claim 19 where n is 1 and A is acylamino.
Claim 28
Dependent Claim
14 words
A method according to claim 19 where n is 1 and A is nitro.
References Cited (Backward Citations)
US2453347A
Cited
US2857276A
Cited
US3615513A
Cited
US3592647A
Cited
US3721559A
Cited
US3681072A
Cited
US3894871A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |