Magnetic erasing head

Details Magnetic erasing head Magnetic erasing head

G - Physics

11

B

352/29.5

G11B 5/325 (2006.01) G11B 5/265 (2006.01)

Patent

CA 1195773

ABSTRACT OF THE DISCLOSURE A permanent magnet type erasing head for generating a gradually decreasing alternating magnetic field in which a plurality of magnetic poles are provided along a magnetic recording medium. The first magnetic pole generates a magnetic field of an intensity strong enough to saturate the magnetic recording medium while each of the second and succeeding magnetic poles except the last magnetic pole have a magnetic field with an opposite polarity to that of a preceding magnetic pole and a weaker intensity than that of the preceding magnetic pole.

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