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:
Mar. 11, 2008
Filed:
Jun. 26, 2002
Akio Oda, Shizuoka-ken, JP;
Hideo Miyake, Shizuoka-ken, JP;
Tomoyoshi Mitsumoto, Shizuoka-ken, JP;
Takeshi Serikawa, Shizuoka-ken, JP;
Ikuo Kawauchi, Shizuoka-ken, JP;
Ippei Nakamura, Shizuoka-ken, JP;
Akio Oda, Shizuoka-ken, JP;
Hideo Miyake, Shizuoka-ken, JP;
Tomoyoshi Mitsumoto, Shizuoka-ken, JP;
Takeshi Serikawa, Shizuoka-ken, JP;
Ikuo Kawauchi, Shizuoka-ken, JP;
Ippei Nakamura, Shizuoka-ken, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
A positive planographic printing plate precursor includes a support having disposed thereon a lower thermosensitive layer containing a water-insoluble but alkali-soluble polymer compound and an upper thermosensitive layer containing a water-insoluble but alkali-soluble polymer compound, with alkali-solubility increasing under heat, wherein (i) both the upper thermosensitive layer and the lower thermosensitive layer contain an IR absorbing dye, with the ratio of the IR absorbing dye concentration in the upper thermosensitive layer to the IR absorbing dye concentration in the lower thermosensitive layer is 1.6 to 10.0, and/or (ii) the upper thermosensitive layer and the lower thermosensitive layer contain different IR absorbing dyes, and/or (iii) at least one of the upper thermosensitive layer and the lower thermosensitive layer contains an IR absorbent having, in one molecule, at least two chromophoric groups that absorb IR light, with the chromophoric groups bonding to each other via a covalent bond.