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:
Nov. 07, 1995
Filed:
Apr. 05, 1994
Seiji Kawasumi, Shizuoka, JP;
Yuzo Inukai, Shizuoka, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A planographic printing plate in which a design pattern is realized in a part of the back surface of a support for the planographic printing plate without any adverse influence on a photosensitive resin layer on the front surface thereof. After an aluminum support with a thickness of 0.24 mm is cleaned by degreasing and etching, an electrolytic aqueous solution is prepared to contain the nitric acid concentration of 10 g/l and the aluminum ion concentration of 7 g/l. In an electrolytic treatment cell 5, the back surface of the aluminum support is arranged so as to be faced to an electrode. A 1 mm-thick masking plate formed of an insulating material punched to provided openings with arbitrary shapes is brought into close contact with the back surface of the aluminum support so that the back surface of the aluminum support is covered with the masking plate. A carbon plate with a thickness of 50 mm is used as the electrode. Further, the electrolytic aqueous solution is supplied from a blowout nozzle toward the masking plate at a flow rate of 50 m/min. The electrode and the aluminum support are connected to an electric source through a cable so that the aluminum support 7 was partially roughened electrochemically.