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:
Jul. 03, 1984
Filed:
Dec. 29, 1981
Kazunori Tabaru, Saitama, JP;
Noriyuki Noda, Kumagaya, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A ferrite magnet and a method of producing same, wherein a mixture of magnetoplumbite type ferrite particles contained as its principal constituent and at least one of a mixing medium, an organic binder and a minute particular additive which is added with water or methyl alcohol is subjected to extrusion compacting to form compacts. The formed compacts are each subjected to at least drying, sintering, orienting and magnetizing, to produce cylindrical ferrite magnets having a plurality of magnetic poles on the surface. To impart anisotropy to the magnets, at least one pulse magnetic field may be applied on the surface of each compact formed by extrusion compacting, and the oriented compact may be magnetized in the same direction as the direction in which the anisotropy has been imparted.