Rotary magnetic head tape-scanning device with heads protected f

Details Rotary magnetic head tape-scanning device with heads protected f Rotary magnetic head tape-scanning device with heads protected f

1989-05-23

1991-12-24

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Head

Head accessory

360 84, 360110, 36013022, 360129, G11B 510, G11B 1500

Patent

active

050758098

ABSTRACT:
A magnetic head affixed to the underside of a carrier body mounted at the periphery of a head-wheel for scanning oblique tracks on a magnetic tape is provided with shielding of ferrite, mu-metal or amorphous iron, to reduce magnetic crosstalk. The shielding surrounds the part of the magnetic head that projects beyond the head carrier body except for a small portion near the polished surface that needs to be left uncovered to avoid interfering aerodynamically with the contact of the magnetic head with a magnetic tape. One piece of the shielding is of rectilinear shallow U-shaped profile, forming a pocket for the magnetic head below the carrier body and extends beyond the tip of the carrier body, where the second piece of shielding material completes an annular shielding ring around the end of the magnetic head. This shielding is particularly useful for an after-check playback head used during recording to check on the quality of the recorded signals.

REFERENCES:
patent: 4636902 (1987-01-01), Dalziel et al.
patent: 4816950 (1989-03-01), Heinz et al.
patent: 4891726 (1990-01-01), Suwa et al.
patent: 4935830 (1990-06-01), Hiraoka et al.
patent: 4935832 (1990-06-01), Das et al.

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