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. 24, 2001
Filed:
Mar. 15, 1999
Steven E. Stupp, Mountain View, CA (US);
Kofi A. A. Makinwa, Eindhoven, NL;
Martinus L. J. M. Van De Ven, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A rotary magnetic head device for a helical scanning magnetic recording and reproducing apparatus includes a rotary drum, a thin-film magnetic head (,) protruding from the rotary drum in a diametrical direction for coming into contact with a magnetic tape (,), obliquely wound around part of the outer peripheral surface of the rotary drum, and head control circuit for adjusting the protrusion of the magnetic head (,) in the diametrical direction. The head control circuit includes a feed-forward control arrangement (,) to bring and hold the magnetic head into a protruded position in which the magnetic head exerts a constant normal force on a tape (,) wound around the drum.