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:
Mar. 26, 2002
Filed:
Mar. 08, 1999
Applicant:
Inventor:
Yoshiyasu Honma, Katano, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 5/127 ; B23H 5/04 ;
U.S. Cl.
CPC ...
G11B 5/127 ; B23H 5/04 ;
Abstract
A method is provided for producing a magnetic head which includes a pair of magnetic cores. The method includes the steps of disposing projection end faces of respective magnetic cores to and opposite each other with a magnetic gap member inserted therebetween. The magnetic cores are welded together with a pair of back glass blocks, and a pair of circular shaped notches regulating track width are formed via electric discharge machining. Thereafter, a groove is filled with a glass material using heat treatment to form front glass blocks interposed between a magnetic tape sliding face and the back glass blocks.