EP0067056A1
Expired / Lapsed
EP
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Lithographic printing plate having an aluminium alloy support
Assignee: Fujifilm Holdings Corp
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Filing: 1982-06-04
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Granted: —
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Expires: 2002-06-04
Abstract
Abstract An aluminum alloy support for a lithographic printing plate, comprising: a rolled plate of aluminum alloy comprised of: 1.2% or less Fe; impurities each present in an amount of 0.15% or less; and, Al as the residual proportion, wherein the rolled plate has a distribution of intermetallic compounds, the compounds having grain sizes of 3 microns or less, which are positioned directly under an outer surface of the rolled plate.
Inventors
- 👤 Azusa Ohashi
- 👤 Akira Shirai
- 👤 Kazushige Takizawa
- 👤 Shiro Terai
- 👤 Shin Tsuchida
- 👤 Yoshikatsu Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 03:55
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; B32B15/016; B41; B41N; B41N1/00; B41N1/04; B41N1/08; B41N1/083; C; C22; C22C; C22C21/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/12764
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
An aluminum alloy support for a lithographic printing plate, comprising: a rolled plate of aluminum alloy comprised of: 1.2% or less Fe; impurities each present in an amount of 0.15% or less; and, Al as the residual proportion, wherein the rolled plate has a distribution of intermetallic compounds, the compounds having grain sizes of 3 microns or less, which are positioned directly under an outer surface of the rolled plate.
Claim 2
Dependent Claim
70 words
An aluminum alloy support for a lithographic printing plate, comprising: a rolled plate of aluminum alloy comprised of: 1.2% or less Fe; impurities each present in an amount of 0.15% or less; and, Al as the residual proportion, wherein the rolled plate has a distribution of intermetallic compounds, the compounds having grain sizes of 3 microns or less, which are positioned directly under an outer surface of the rolled plate.
Claim 3
Dependent Claim
17 words
An aluminum alloy support as claimed in Claim 1, wherein the surface is roughened and anodically oxidized.
Claim 4
Dependent Claim
106 words
A composite aluminum-alloy support for a lithographic printing plate, comprising: a plate consisting essentially of 98.0% or more Al, 1.2% or less Fe, and impurities each of which are present in an amount of 0.15% or less, the plate having a thickness of 1.0 microns or more; and, a core material having a surface united with a surface of the plate, the core material comprised of aluminum alloy having a stress resistance of 15 kg/mm 2 or more, wherein the outer surface of the plate includes a distribution of intermetallic compounds directly under the outer surface, the compounds having grain sizes of 3 microns or less.
Claim 5
Dependent Claim
106 words
A composite aluminum-alloy support for a lithographic printing plate, comprising: a plate consisting essentially of 98.0% or more Al, 1.2% or less Fe, and impurities each of which are present in an amount of 0.15% or less, the plate having a thickness of 1.0 microns or more; and, a core material having a surface united with a surface of the plate, the core material comprised of aluminum alloy having a stress resistance of 15 kg/mm 2 or more, wherein the outer surface of the plate includes a distribution of intermetallic compounds directly under the outer surface, the compounds having grain sizes of 3 microns or less.
Claim 6
Dependent Claim
27 words
A composite aluminum alloy support for a lithographic printing plate as claimed in Claim 3, wherein the outer surface of the plate is roughened and anodically oxidized.
Claim 7
Dependent Claim
34 words
A composite aluminum alloy support for a lithographic printing plate as claimed in Claim 3 or Claim 4, wherein the outer surface of the plate has a thickness of from 10 to 100 microns.
Claim 8
Dependent Claim
15 words
A lithographic printing plate having a (composite) aluminum support as claimed in any preceding Claim.
Claim 9
Dependent Claim
11 words
The features herein described, or their equivalents, in any novel selection.
Claim 10
Dependent Claim
11 words
The features herein described, or their equivalents, in any novel selection.
References Cited (Backward Citations)
GB1224226A
Cited
DE1929146A1
Cited
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