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. 08, 1988
Filed:
Nov. 03, 1986
Johannes P Verbunt, Eindhoven, NL;
Wilibrordus G Van Den Hoek, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A magnetic head (1) includes a core of a magnetic material having two parts (2, 3) spaced apart from each other to form a non-magnetic transducing gap (4) which is bounded on one side by a winding aperture (5) extending in the gap-bounding surface of at least one of the core parts and narrowing towards the transducing gap. To produce an accurate gap dimension the part of the winding aperture (5) immediately adjoining the transducing gap (4) is formed by a channel (6, 13, 20, 21, 32, 33) of a defined depth. The channel is formed in the gap-bounding surface of the core parts by means of an etching process. During the etching of the channels polishing marks may be simultaneously produced, the polishing marks serving as guides for subsequent grinding/polishing stages in the production of the magnetic head.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile