US3860426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subbed lithographic printing plate
Assignee: Eastman Kodak Co
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Filing: 1972-12-22
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Granted: 1975-01-14
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Expires: 1992-12-22
Abstract
Abstract A printing plate is prepared by coating on an anodized aluminum support a hydrophilic cellulosic layer containing a water-soluble salt of a metal such as zinc, calcium, magnesium, barium, strontium, cobalt or manganese. A radiation-sensitive material to provide a polymeric printing layer is coated over the hydrophilic subbing layer, exposed to an image, and processed. In the areas where the polymeric material is removed in processing, the hydrophilic cellulosic subbing is exposed. Incorporation of the metal salt therein improves the resistance to scumming when the lithographic plate is used on a lithographic printing press.
Inventors
- 👤 Michael P Cunningham
- 👤 David J Mcclune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:55
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/10; B41C1/1008; B41C1/1016; B41N; B41N3/00; B41N3/03; B41N3/036; B41C2201/00; B41C2201/02; B41C2201/14; B41C2210/00; B41C2210/02; B41C2210/06; B41C2210/24
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
30 words
IN A LITHOGRAPHIC PRINTING PLATE HAVING AN ANODIZED ALUMINUM SUPPORT, A HYDROPHILIC CELLULOSIC SUBBING LAYER AND A SELECTIVELY REMOVABLE POLYMERIC PRINTING LAYER PREPARED FROM A RADIATION-SENSITIVE POLYMER CONTAINING THE GROUPING:
Claim 2
Dependent Claim
30 words
IN A LITHOGRAPHIC PRINTING PLATE HAVING AN ANODIZED ALUMINUM SUPPORT, A HYDROPHILIC CELLULOSIC SUBBING LAYER AND A SELECTIVELY REMOVABLE POLYMERIC PRINTING LAYER PREPARED FROM A RADIATION-SENSITIVE POLYMER CONTAINING THE GROUPING:
Claim 3
Dependent Claim
15 words
A lithographic plate of claim 1 in which said cellulosic layer comprises a carboxyalkylcellulose salt.
Claim 4
Dependent Claim
14 words
A lithographic plate of claim 2 in which said cellulosic layer comprises carboxymethylcellulose salt.
Claim 5
Dependent Claim
13 words
A lithographic plate of claim 1 in which said cellulosic layer comprises hydroxyethylcellulose.
Claim 6
Dependent Claim
22 words
A lithographic plate of claim 1 in which the coverage of said subbing layer is about 0.2 mg to about 1.1 mg/dm2.
Claim 7
Dependent Claim
21 words
A lithographic plate of claim 1 in which said polymeric printing layer is comprised of a radiation-sensitive glycol p-phenylene diacrylate polyester.
Claim 8
Dependent Claim
10 words
A lithographic plate of claim 1 comprising a zinc salt.
Claim 9
Dependent Claim
27 words
A lithographic plate of claim 1 having therein said salt in an amount of about 50 to about 200 percent by weight of said cellulosic subbing layer.
Claim 10
Dependent Claim
24 words
A lithographic plate of claim 1 having thereon said salt in an amount of about 1:1 on a weight basis in said cellulosic subbing.
Claim 11
Dependent Claim
30 words
A lithographic plate of claim 1 having thereon a salt selected from the class consisting of salicylate, acetate, acetylacetonate, propionate, bromide, chloride, benzoate, borate, fluoride, iodide, nitrate, sulfate and thiocyanate.
Claim 12
Dependent Claim
18 words
A lithographic plate of claim 1 in which said polymeric printing layer is prepared from a photopolymerizable material.
References Cited (Backward Citations)
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US3301674A
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US3265504A
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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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |