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:
Apr. 27, 1982
Filed:
Mar. 07, 1980
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
A process for producing roll-shaped magnets which may be used in electrophotographic copying machines or the like. At least two types of composite magnet sheets of different magnetic characteristics, each having a magnetic orientation in the thickness direction, are superposed to form a laminated body. A plurality of wedge-shaped indentations are formed in one side of the laminated body. The laminated body is then wound around a shaft so that its surface having the indentations constitutes the inner peripheral surface. A magnetization is then effected. This process conveniently permits the full magnetization of the laminated body to ensure a high quality and superior characteristic of the products, as well as a high productivity. during the mass production of such magnets.