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Rotary magnetic head tape-scanning device with heads protected from cross-talk by mounting on a head carrier and by annular shielding of a portion of the head projecting from the head carrier

  • US 5,075,809 A
  • Filed: 05/23/1989
  • Issued: 12/24/1991
  • Est. Priority Date: 07/15/1988
  • Status: Expired due to Fees
First Claim
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1. A rotary multiple-magnetic-head device of a recording and/or playback apparatus for scanning magnetic tape records comprising:

  • a headwheel (1) having an axis of revolution and having a periphery, and a plurality of magnetic head carriers (8) each mounted at the periphery of said headwheel and each having a tip portion extending radially beyond the headwheel periphery;

    a plurality of magnetic heads respectively mounted on a corresponding plurality of said carriers, each said head having a first portion projecting away from said axis beyond the tip portion of the carrier on which it is mounted, for intermittent contact of a tip region of said first magnetic head portion with said tape when said headwheel revolves, and a second portion affixed to said carrier having a surface substantially flush with a surface of said tip portion of said carrier on which it is mounted;

    a magnetically shielding structure of a material having low magnetic reluctance and high magnetic permeability mounted on each said carrier on which a head of said plurality of heads is mounted and surrounding part of said first portion and covering said second portion of the magnetic head mounted on the respective carrier, said shielding structure being of a configuration which forms, together with the carrier on which it is mounted, a pocket within which is encased all but said tip portion of said magnetic head mounted on said carrier.

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