US4861698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive lithographic plate using no dampening water
Assignee: Fujifilm Holdings Corp
•
Filing: 1987-11-23
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Granted: 1989-08-29
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Expires: 2007-11-23
Abstract
Abstract A photosensitive lithographic plate is suitable for use in making a water-less lithographic plate which does not require dampening water. The photosensitive lithographic plate has a primer layer containing a hardened gelatin, a photosensitive layer and a silicone rubber layer. The silicone rubber layer and the photosensitive layer are imagewise removed as a result of the imagewise exposure and development so as to expose portions of the primer layer corresponding to an image. The exposed gelatin-containing plate is securely adhered to the substrate and is easily dyeable for examination of the formed image.
Inventors
- 👤 Toshihiko Hiruma
- 👤 Hiroshi Takahashi
- 👤 Norihiko Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:30
CPC Classifications
B; B41; B41N; B41N1/00; B41N1/003; G; G03; G03F; G03F7/00; G03F7/004; G03F7/075; G03F7/0752; Y; Y10; Y10S; Y10S430/00; Y10S430/155; Y10S430/162
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
32 words
A photosensitive lithographic plate requiring no dampening water, which comprises a metal substrate, and a primer layer containing a hardened gelatin, a photosensitive layer and a silicone rubber layer, in said order.
Claim 2
Dependent Claim
32 words
A photosensitive lithographic plate requiring no dampening water, which comprises a metal substrate, and a primer layer containing a hardened gelatin, a photosensitive layer and a silicone rubber layer, in said order.
Claim 3
Dependent Claim
27 words
A photosensitive lithographic plate of claim 1, wherein the hardened gelatin is formed by adding a hardening agent to a photographic gelatin and curing it by heating.
Claim 4
Dependent Claim
21 words
A photosensitive lithographic plate of claim 2, wherein the hardening agent is an inorganic hardening agent or an organic hardening agent.
Claim 5
Dependent Claim
18 words
A photosensitive lithographic plate of claim 3, wherein the organic hardening agent is an aldehyde or a dichloro-s-triazine.
Claim 6
Dependent Claim
34 words
A photosensitive lithographic plate of claim 2, wherein the hardening agent is added to the gelatin in an amount of 1 to 200 m mol relative to 100 parts by weight of the gelatin.
Claim 7
Dependent Claim
24 words
A photosensitive lithographic plate of claim 1, wherein the primer layer is coated on the substrate in the dry thickness of 0.1 to 50μ.
Claim 8
Dependent Claim
25 words
A photosensitive lithographic plate of claim 1, wherein the primer layer further contains a filler, an anti-halation agent, a dyestuff or an acid generating agent.
Claim 9
Dependent Claim
15 words
A photosensitive lithographic plate of claim 1, wherein the photosensitive layer contains a photopolymerizable composition.
Claim 10
Dependent Claim
37 words
A photosensitive lithographic plate of claim 8, wherein the photopolymerizable composition comprises an unsaturated monomer having a boiling temperature above 100° C. and non-volatile at room temperature or an oligomer thereof, a photosensitizer and a heat-polymerization inhibitor.
Claim 11
Dependent Claim
30 words
A photosensitive lithographic plate of claim 1, wherein the photosensitive layer comprises a polymer having, in a main chain or side chain of the polymer the following group of ##STR14##
Claim 12
Dependent Claim
14 words
A photosensitive lithographic plate of claim 1, wherein the photosensitive layer comprises O-quinonediazide compound.
Claim 13
Dependent Claim
22 words
A photosensitive lithographic plate of claim 1, wherein the photosensitive layer further contains an organic tin compound and a silane coupling agent.
Claim 14
Dependent Claim
16 words
A photosensitive lithographic plate of claim 12, wherein the silane coupling agent is an amino silane.
Claim 15
Dependent Claim
25 words
A photosensitive lithographic plate of claim 1, wherein the photosensitive layer is coated on the primer layer in the thickness of not more than 1μ.
Claim 16
Dependent Claim
25 words
A photosensitive lithographic plate of claim 1, wherein silicone rubber layer is coated on the photosensitive layer in the thickness of 0.5 μm to 10μ.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-28 | 1993-02-27 | 1993-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-28 | 1997-02-27 | 1997-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-28 | 2001-02-27 | 2001-08-29 | $7700.00 | Window Closed / Lapsed |