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:
Apr. 06, 2004
Filed:
Jul. 22, 2002
Tadashi Endo, Shizuoka, JP;
Hisashi Hotta, Shizuoka, JP;
Katsuyuki Teraoka, Shizuoka, JP;
Hideki Miwa, Shizuoka, JP;
Teruyoshi Yasutake, Shizuoka, JP;
Fuji Photo Film Co., Ltd., Minami-Ashigara, JP;
Abstract
Objects of the present invention are to provide a positive working presensitized plate of a thermal type, which has damage resistance, and which is handled easily in conventional operation, high in sensitivity and excellent in press life when used as a lithographic printing plate, and to provide a support for a lithographic printing plate, which is suitably used for the same. The objects have been achieved by a support for a lithographic printing plate obtained by performing graining treatment, alkali etching treatment and anodizing treatment on an aluminum plate, wherein a ratio of a real area of a surface thereof to an apparent area of the surface set larger by 1.3 to 1.8 times, comprising a pit having an average diameter of 0.3 to 1.0 &mgr;m and a micro grained structure inside on the surface, wherein a ratio of an apparent area of the pits to the apparent area of the surface is 90% or more; and a presensitized plate comprising the support for a lithographic printing plate and a photosensitive layer that can become alkali-soluble by heating provided on the support.