US4467028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid interlayered planographic printing plate
Assignee: Polychrome Corp
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Filing: 1982-07-12
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Granted: 1984-08-21
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Expires: 2002-07-12
Abstract
Abstract A planographic printing plate comprises an anodized metal substrate, an interlayer on the substrate and a photosensitive layer on the interlayer in which the interlayer is a hydroxy-substituted organic acid.
Inventors
- 👤 Jen-Chi Huang
- 👤 James Shelnut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:28
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/03; B41N3/034
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
49 words
A presensitized planographic printing plate comprising an anodized metal substrate, an interlayer directly on the substrate and a photosensitive layer on the interlayer, wherein the interlayer comprises a hydroxy substituted organic acid selected from the group consisting of gluconic acid, tartaric acid, hydroxy propionic acid, and hydroxy acetic acid.
Claim 2
Dependent Claim
49 words
A presensitized planographic printing plate comprising an anodized metal substrate, an interlayer directly on the substrate and a photosensitive layer on the interlayer, wherein the interlayer comprises a hydroxy substituted organic acid selected from the group consisting of gluconic acid, tartaric acid, hydroxy propionic acid, and hydroxy acetic acid.
Claim 3
Dependent Claim
19 words
The presensitized planographic printing plate of claim 1, wherein the metal substrate is an aluminum or aluminum alloy substrate.
Claim 4
Dependent Claim
22 words
The presensitized planographic printing plate of claim 2, wherein the anodized aluminum or aluminum alloy substrate is grained or grained and etched.
Claim 5
Dependent Claim
58 words
A method of forming the presensitized planographic printing plate of claim 1, comprising contacting an anodized metal substrate with a solution of a hydroxy substituted organic acid selected from the group consisting of gluconic acid, tartaric acid, hydroxy propionic acid, and hydroxy acetic acid and thereafter applying a photosensitive layer on the treated surface of the metal substrate.
Claim 6
Dependent Claim
31 words
The method of claim 4, wherein the anodized metal substrate is grained or grained and etched the hydroxy substituted organic acid is a monohydroxy or polyhydroxy carboxylic acid in aqueous solution.
Claim 7
Dependent Claim
21 words
The method of claim 5, wherein the organic acid treated substrate is washed with water before application of the photosensitive layer.
Claim 8
Dependent Claim
16 words
The method of claim 4, wherein said presensitized plate is of a positive or negative character.
Claim 9
Dependent Claim
53 words
An imaged planographic printing plate comprising an anodized metal substrate, an interlayer directly on the substrate and a developed photosensitive layer on preselected portions of the interlayer, wherein the interlayer comprises a hydroxy substituted organic acid selected from the group consisting of gluconic acid, tartaric acid, hydroxy propionic acid, and hydroxy acetic acid.
Claim 10
Dependent Claim
53 words
An imaged planographic printing plate comprising an anodized metal substrate, an interlayer directly on the substrate and a developed photosensitive layer on preselected portions of the interlayer, wherein the interlayer comprises a hydroxy substituted organic acid selected from the group consisting of gluconic acid, tartaric acid, hydroxy propionic acid, and hydroxy acetic acid.
Claim 11
Dependent Claim
19 words
The imaged planographic printing plate of claim 8, wherein the metal substrate is an aluminum or aluminum alloy substrate.
Claim 12
Dependent Claim
18 words
The imaged planographic printing plate of claim 9, wherein the anodized aluminum or aluminum alloy substrate is grained.
Claim 13
Dependent Claim
87 words
A method of forming the imaged planographic printing plate of claim 8, comprising contacting an anodized metal substrate with a solution of a hydroxy substituted organic acid from the group consisting of gluconic acid, tartaric acid, hydroxy propionic acid, and hydroxy acetic acid to form directly an interlayer applying a photosensitive layer on the treated surface of the metal substrate, exposing preselected portions of the photosensitive layer to light and contacting the light exposed surface with an agent capable of removing undeveloped portions of the photosensitive layer.
Claim 14
Dependent Claim
31 words
The method of claim 11, wherein the anodized metal substrate is grained or grained and etched the hydroxy substituted organic acid is a monohydroxy or polyhydroxy carboxylic acid in aqueous solution.
Claim 15
Dependent Claim
21 words
The method of claim 11, wherein the organic acid treated substrate is washed with water before application of the photosensitive layer.
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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) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |