The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 2012
Filed:
Oct. 30, 2009
Akio Uesugi, Shizuoka, JP;
Atsushi Matsuura, Shizuoka, JP;
Hiroshi Ougi, Tokyo, JP;
Atsushi Hibino, Tokyo, JP;
Akio Uesugi, Shizuoka, JP;
Atsushi Matsuura, Shizuoka, JP;
Hiroshi Ougi, Tokyo, JP;
Atsushi Hibino, Tokyo, JP;
Fujifilm Corporation, Minato-Ku, Tokyo, JP;
Sumitomo Light Metal Industries, Ltd., Minato-Ku, Tokyo, JP;
Abstract
An aluminum alloy sheet for a lithographic printing plate includes 0.03 to 0.15% (mass %, hereinafter the same) of Si, 0.2 to 0.7% of Fe, 0.05 to 0.5% of Mg, 0.003 to 0.05% of Ti, and 30 to 300 ppm of Ga, with the balance being aluminum and inevitable impurities, a surface area of the aluminum alloy sheet having an average recrystallized grain size of 50 μm or less in a direction perpendicular to a rolling direction, an Mg concentration that is higher than the average Mg concentration by a factor of 5 to 50, and a Ga concentration that is higher than the average Ga concentration by a factor of 2 to 20, the surface area being an area up to a depth of 0.2 μm from the surface of the aluminum alloy sheet.