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:
Jun. 29, 1976
Filed:
Apr. 04, 1973
Kikuo Kubotera, Asaka, JA;
Eiichi Mizuki, Asaka, JA;
Fuji Photo Film Co., Ltd., Minami-ashigara, JA;
Abstract
A printing plate having halftones and lines is produced by exposing a photosensitive printing plate material comprising a support having an oleophilic surface, a hydrophilic layer formed thereon and a layer of a direct positive-type photosensitive silver halide emulsion formed on top of the hydrophilic layer through a positive original, developing the exposed material to form a silver image in the emulsion layer, subjecting the developed material to an etch bleaching treatment to remove the hydrophilic layer at portions corresponding to the silver image and to reveal the oleophilic surface, and removing the emulsion layer at a portion on which the silver image is not formed, thereby to reveal said hydrophilic layer. The printing plate can given a number of good quality impressions from the outset of printing, and smeared impressions do not result during continued printing operation.