US5605780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithographic printing plate adapted to be imaged by ablation
Assignee: Kodak Graphics Holding Inc
•
Filing: 1996-03-12
•
Granted: 1997-02-25
•
Expires: 2016-03-12
Abstract
Abstract A lithographic printing plate is comprised of an anodized aluminum support having thereon an oleophilic image-forming layer comprising an infrared-absorbing agent dispersed in a film-forming cyanoacrylate polymer binder. The plate is imagewise exposed to a focused high-intensity infrared laser beam which removes the oleophilic image-forming layer by thermal ablation to thereby reveal the underlying hydrophilic support surface. The cyanoacrylate polymers provide superior performance due to their combination of low decomposition temperature, good ink receptivity, good adhesion to the support and good wear characteristics.
Inventors
- 👤 Mitchell S. Burberry
- 👤 Charles D. DeBoer
- 👤 Sharon W. Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:19
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/10; B41C1/1008; B41C1/1033; B41C2210/00; B41C2210/02; B41C2210/08; B41C2210/24; Y; Y10; Y10S; Y10S430/00; Y10S430/145; Y10S430/165
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
75 words
A lithographic printing plate comprising an anodized aluminum support and an image-forming layer overlying said support; said image-forming layer comprising an infrared-absorbing agent dispersed in a film-forming polymeric binder; said film-forming polymeric binder being a cyanoacrylate polymer and said infrared-absorbing agent being dispersed therein in an amount sufficient for said image-forming layer to be imaged by laser-induced thermal ablation which completely removes said image-forming layer in exposed regions thereof to thereby reveal said underlying support.
Claim 2
Dependent Claim
75 words
A lithographic printing plate comprising an anodized aluminum support and an image-forming layer overlying said support; said image-forming layer comprising an infrared-absorbing agent dispersed in a film-forming polymeric binder; said film-forming polymeric binder being a cyanoacrylate polymer and said infrared-absorbing agent being dispersed therein in an amount sufficient for said image-forming layer to be imaged by laser-induced thermal ablation which completely removes said image-forming layer in exposed regions thereof to thereby reveal said underlying support.
Claim 3
Dependent Claim
18 words
A lithographic printing plate as claimed in claim 1, wherein said aluminum support is both grained and anodized.
Claim 4
Dependent Claim
23 words
A lithographic printing plate as claimed in claim 1, wherein said aluminum support is grained, anodized and provided with a hydrophilic barrier layer.
Claim 5
Dependent Claim
30 words
A lithographic printing plate as claimed in claim 1, wherein said infrared-absorbing agent is a dye or pigment of the squarylium, croconate, cyanine, merocyanine, indolizine, pyrylium or metal dithiolene classes.
Claim 6
Dependent Claim
21 words
A lithographic printing plate as claimed in claim 1, wherein said infrared-absorbing agent is an infrared-absorbing dye of the formula: ##STR7##
Claim 7
Dependent Claim
21 words
A lithographic printing plate as claimed in claim 1, wherein said infrared-absorbing agent is an infrared-absorbing dye of the formula: ##STR8##
Claim 8
Dependent Claim
21 words
A lithographic printing plate as claimed in claim 1, wherein said infrared-absorbing agent is an infrared-absorbing dye of the formula: ##STR9##
Claim 9
Dependent Claim
21 words
A lithographic printing plate as claimed in claim 1, wherein said infrared-absorbing agent is an infrared-absorbing dye of the formula: ##STR10##
Claim 10
Dependent Claim
17 words
A lithographic printing plate as claimed in claim 1, wherein said cyanoacrylate polymer is a poly(alkyl cyanoacrylate).
Claim 11
Dependent Claim
17 words
A lithographic printing plate as claimed in claim 1, wherein said cyanoacrylate polymer is a poly(alkoxyalkyl cyanoacrylate).
Claim 12
Dependent Claim
27 words
A lithographic printing plate as claimed in claim 1, wherein said cyanoacrylate polymer has a molecular weight in the range of from about 50000 to about 400000.
Claim 13
Dependent Claim
15 words
A lithographic printing plate as claimed in claim 1, wherein said cyanoacrylate polymer is poly(methyl-2-cyanoacrylate).
Claim 14
Dependent Claim
15 words
A lithographic printing plate as claimed in claim 1, wherein said cyanoacrylate polymer is poly(ethyl-2-cyanoacrylate).
Claim 15
Dependent Claim
15 words
A lithographic printing plate as claimed in claim 1, wherein said cyanoacrylate polymer is poly(methyl-2-cyanoacrylate-co-ethyl-2-cyanoacrylate).
Claim 16
Dependent Claim
15 words
A lithographic printing plate as claimed in claim 1, wherein said cyanoacrylate polymer is poly(methoxyethyl-2-cyanoacrylate).
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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) | 2000-02-25 | 2000-08-26 | 2001-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-25 | 2004-08-26 | 2005-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-25 | 2008-08-26 | 2009-02-25 | $7700.00 | Window Closed / Lapsed |