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. 25, 1978
Filed:
Sep. 27, 1976
Applicant:
Inventor:
Naohiko Toshimitsu, Chichibu, JA;
Assignees:
Canon Kabushiki Kaisha, Tokyo, JA;
Canon Denshi Kabushiki Kaisha, BOTH OF, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ; G11B / ;
U.S. Cl.
CPC ...
360126 ; 360119 ; 360123 ; 360125 ;
Abstract
The magnetic head of the present invention has a core thickness set up in accordance with the range of the permeability drop starting frequency of the core material which is determined to reduce the influence imparted to the reproducing frequency characteristic of the head by any minute variation in the technique of making the head gap. The core thickness of the magnetic head may be attained by using a smaller number of superposed layers to form the core than in a conventional magnetic head, and in some cases, a single layer of the core may be used to provide the track width.