Bulk tape erasing system

Details Bulk tape erasing system Bulk tape erasing system

1982-01-04

1984-07-24

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Erase

360 66, 361151, G11B 502

Patent

active

044620551

ABSTRACT:
A degaussing head is mounted on a tape drive transport unit adjacent to a rotating reel of tape. The degaussing head is selectively energized by a signal indicating that the tape is to be erased. Preferably, the degaussing head takes the form of an E-shaped iron core driven by a coil supplied with attenuated DC current. The degaussing head is mounted on the door of the tape drive transport cabinet in such a manner that when the door is closed the legs of the degaussing head orthogonally span the tape in the reel to provide an attenuated alternating magnetic field for bulk erasing the tape as it is rotated past the head.

REFERENCES:
patent: 2766328 (1956-10-01), Handschin
patent: 3329872 (1967-07-01), Amos
patent: 4136373 (1979-01-01), Amos
patent: 4146956 (1979-04-01), Fujiwara
patent: 4180835 (1979-12-01), Okumura et al.
patent: 4187521 (1980-02-01), Rotter et al.
patent: 4423460 (1983-12-01), Jackson et al.

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