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. 29, 1994
Filed:
Feb. 16, 1993
Soichiro Matsuzawa, Kuwana, JP;
Yayo Akai, Nagoya, JP;
NGK Insulators, Ltd., , JP;
Abstract
A method of producing a magnetic head core having a coil-winding groove around which an annular magnetic path is formed, and a magnetic gap intersecting the magnetic path, and a track having a predetermined track width and extending in a direction perpendicular to the magnetic gap, the magnetic gap and track being formed in a medium-sliding surface of the head core. The method includes the steps of: forming a track precursor in a surface of a core body which gives the medium-sliding surface of the head core, the track precursor having a larger width than a predetermined track width, and extending across the magnetic gap in a longitudinal direction of the core body; and pressing a shearing tool against the track precursor, and applying a force to the shearing tool to thereby remove by shearing at least one of widthwise opposite portions of the track precursor adjacent to the magnetic gap, so as to form the track having a predetermined track width in the vicinity of the magnetic gap.