U.S. Philips Corporation

Kofi A A Makinwa

Steven E Stupp

Martinus L J M Van De Ven

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.

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Eindhoven, Netherlands

Kofi A A Makinwa