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. 11, 2006
Filed:
May. 01, 2001
Kiyoshi Matsui, Koidemachi, JP;
Yoshinobu Umaji, Daito, JP;
Kiyoshi Matsui, Koidemachi, JP;
Yoshinobu Umaji, Daito, JP;
Funai Electric Co., Ltd., Osaka, JP;
Abstract
The invention provides a simple method for forming a gap for an erasure head to improve the quality of this erasure head. A front coreconstituting an erasure head H includes in configuration two magnetic substancesand a magnetic gapmade of a non-magnetic substance arranged between these two magnetic substances, in which the gapmade of the non-magnetic substance is bonded by adhesion or welding between those two magnetic substances. By this method, the gap can be formed free of an air bubble, with good mass-productivity, and inexpensively as compared to a prior art method of forming a gap by glass bonding.