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:
Aug. 18, 1981
Filed:
Sep. 07, 1979
Eiji Ohno, Tokyo, JP;
Kazuo Chikugo, Hiratsuka, JP;
Kabushiki Kaisha Komatsu Seisakusho, Tokyo, JP;
Abstract
A method for the production of sintered powder metal preform employing a novel reduction step. As-water-atomized ferrous metal particles are coated by phenol resins by adding said phenol resins to said ferrous metal particles after heating the metal particles to about 130.degree. C. to 150.degree. C. Resin coated ferrous metal particles are then filled in a mold and compacted under high pressure to produce a compacted green preform sufficient to ensure adequate strength for handling after pressing. The green preform is then heated to a reduction temperature within the range of about 1100.degree. C. to 1250.degree. C. for a time sufficient to achieve reduction of said green preform.