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:
Jul. 03, 1990
Filed:
Apr. 21, 1986
Victor Zieren, Eindhoven, NL;
Steven B Luitjens, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
Magnetic head for use in vertical recording has a main magnetic pole of a thin film of soft magnetic material enclosed between two protective blocks together constituting the body of the magnetic head. One protective block includes a magnetic part and a non-magnetic part, the latter extending from the boundary surface of the two parts up to the contact surface between the main pole and a magnetic recording medium. A channel provided at the boundary surface in the magnetic part of the protective block causes a part constituting an auxiliary magnetic pole and adjoining the main magnetic pole to be separated from a part constituting the return path for the magnetic flux from the main pole, a winding embracing the main pole and the auxiliary pole being wound through the channel. The other protective block consists entirely of a non-magnetic material and has a polished surface facing the one protective block, while the main pole is provided on the polished surface.