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. 12, 1991
Filed:
Aug. 08, 1989
Kazuhiro Yokoyama, Tokyo, JP;
Masami Akiyama, Tokyo, JP;
Teiichi Ando, Tokyo, JP;
Yasutaka Kojima, Tokyo, JP;
Nippon Steel Corporation, Tokyo, JP;
Akiyama Printing Machinery Manufacturing Corp., Tokyo, JP;
Abstract
A dampening water feed roller, characterized by a process of manufacturing which comprises forming a flame sprayed layer of a ceramic material composed of Al.sub.2 O.sub.3, TiO.sub.2, or a mixture of Al.sub.2 O.sub.3 and TiO.sub.2 on the peripheral surface of a metallic roller, subjecting the flame sprayed ceramic layer to a pore-occluding treatment with a hydrophilic SiO.sub.2 type inorganic pore-occluding agent, and grinding the treated layer to surface roughness of not more than 1.6 S. The roller permits supply of the dampening water without using the additives such as isopropyl alcohol in the dampening water.