US4755445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry presensitized plate for use in making a lithographic printing plate
Assignee: Fujifilm Holdings Corp
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Filing: 1987-02-09
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Granted: 1988-07-05
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Expires: 2007-02-09
Abstract
Abstract A dry presensitized plate for use in making a lithographic printing plate requiring no dampening water during printing, which comprises a support having provided thereon, in order, a light-sensitive layer of microcapsules comprising a photohardenable monomer or a light-sensitive resin and a silicone rubber layer. The dry presensitized plate makes it possible to obtain a dry lithographic printing plate without using any developers and the removal of the silicone rubber layer. Therefore, the development of the dry presensitized plate is simple and economical.
Inventors
- 👤 Akira Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:35
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/075; G03F7/0752; G03F7/002
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
56 words
A dry presensitized plate for use in making a lithographic printing plate requiring no dampening water during printing which comprises a support having provided thereon, in order, a photohardenable light-sensitive layer of microcapsules comprised of one polymerizable component selected from the group consisting of a photopolymerizable monomer and a light-sensitive resin and a silicone rubber layer.
Claim 2
Dependent Claim
56 words
A dry presensitized plate for use in making a lithographic printing plate requiring no dampening water during printing which comprises a support having provided thereon, in order, a photohardenable light-sensitive layer of microcapsules comprised of one polymerizable component selected from the group consisting of a photopolymerizable monomer and a light-sensitive resin and a silicone rubber layer.
Claim 3
Dependent Claim
31 words
The dry presensitized plate as set forth in claim 1 wherein wall-forming materials of the microcapsule are a member selected from the group consisting of polyurea, polyurethane, polyesters and mixtures thereof.
Claim 4
Dependent Claim
21 words
The dry presensitized plate as set forth in claim 1 wherein the microcapsule has a particle size of 0.01 to 30μ.
Claim 5
Dependent Claim
21 words
The dry presensitized plate as set forth in claim 3 wherein the particle size of the microcapsule is at least 0.5μ.
Claim 6
Dependent Claim
24 words
The dry presensitized plate as set forth in claim 1 wherein the photohardenable monomer is one having at least one vinyl or vinylidene group.
Claim 7
Dependent Claim
34 words
The dry presensitized plate as set forth in claim 5 wherein the vinyl or vinylidene group is a member selected from the group consisting of acryloyl, methacryloyl, allyl, unsaturated polyester, vinyloxy and acrylamido groups.
Claim 8
Dependent Claim
25 words
The dry presensitized plate as set forth in claim 5 wherein the photohardenable monomer has a plurality of vinyl or vinylidene groups in the molecule.
Claim 9
Dependent Claim
33 words
The dry presensitized plate as set forth in claim 1 wherein the microcapsule comprises a photopolymerization initiator capable of absorbing light at ultraviolet to visible region and initiating the polymerization of the monomer.
Claim 10
Dependent Claim
18 words
The dry presensitized plate as set forth in claim 1 wherein the microcapsule further comprises a foaming agent.
Claim 11
Dependent Claim
42 words
The dry presensitized plate as set forth in claim 9 wherein the foaming agent is a member selected from the group consisting of dinitrosopentamethylenetetramine, N,N'-dimethyl-N,N'-dinitrosoterephthalamide, trinitrosotrimethylenetriamine, sulfohydrazido type compounds which are hydrazine derivative of organic sulfonic acid, hydrazo compounds and azo compounds.
Claim 12
Dependent Claim
36 words
The dry presensitized plate as set forth in claim 10 wherein the microcapsule further comprises an auxiliary agent for thermal decomposition in an amount of about 30 to 60% by weight based on the foaming agent.
Claim 13
Dependent Claim
32 words
The dry presensitized plate as set forth in claim 1 wherein an adhesive layer having thickness of 10 mμ to 2μ is disposed between the microcapsule layer and the silicone rubber layer.
Claim 14
Dependent Claim
25 words
The dry presensitized plate as set forth in claim 12 wherein the adhesive layer is composed of an aminosilane layer or an organic titanate layer.
Claim 15
Dependent Claim
29 words
The dry presensitized plate as set forth in claim 1 wherein the silicone rubber layer comprises an adhesive component in an amount of from 0.05 to 10% by weight.
Claim 16
Dependent Claim
29 words
The dry presensitized plate as set forth in claim 14 wherein the amount of the adhesive component added to the silicone rubber layer is 0.1 to 5% by weight.
Claim 17
Dependent Claim
29 words
The dry presensitized plate as set forth in claim 14 wherein the adhesive component is a member selected from the group consisting of an aminosilane and an organic titanate.
Claim 18
Dependent Claim
24 words
The dry presensitized plate as set forth in claim 1 wherein a protective film is provided on the surface of the silicone rubber layer.
References Cited (Backward Citations)
US3677178A
Cited
GB1148362A
Cited
GB1399949A
Cited
GB1419643A
Cited
US3953212A
Cited
US4016814A
Cited
US4086386A
Cited
US4292397A
Cited
US4399209A
Cited
US4636453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-05 | 1992-01-04 | 1992-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-05 | 1996-01-04 | 1996-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-05 | 2000-01-04 | 2000-07-05 | $7700.00 | Window Closed / Lapsed |