Direct current bias fields for magnetic printing

Details Direct current bias fields for magnetic printing Direct current bias fields for magnetic printing

G - Physics

03

G

314/6

G03G 19/00 (2006.01) B41J 2/43 (2006.01)

Patent

CA 1092638

ABSTRACT OF THE DISCLOSURE Recording head current in magnetic printing systems is reduced by application of a direct current magnetic bias field. The bias and recording fields add to produce a sum field with sufficient strength to switch a premagnetized recording medium. The bias field may be applied directly to the surface of the recording medium or may be con- centrated at the recording medium surface by pin poles. In one embodiment of the invention the bias field is supplied by a permanent magnet common pole in a pin poletype re- cording head array.

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