Vertically distant magnetic head units with piezoelectric error

Details Vertically distant magnetic head units with piezoelectric error Vertically distant magnetic head units with piezoelectric error

1991-08-29

1993-12-14

Dzierzynski, Paul M.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360 7716, 36013023, 36013024, 360109, 360 102, G11B 552

Patent

active

052708918

ABSTRACT:
In a helical-scan magnetic-tape apparatus having a scanning unit (102) comprising two diametrically opposed rotatable magnetic-head units (113, 114) which are movable over an actuating distance (A) in two opposite directions (r.sub.1, r.sub.2) by means of actuators (117, 118), the magnetic-head units, with the actuators not activated, are situated at a distance (X) from each other which is smaller than or equal to twice the actuating distance (A). During fast tape transport in a direction opposite to the tape transport direction with which information has been written in tracks on the magnetic tape each magnetic-head unit reads other tracks than those it would read during normal tape transport and/or the read sequence of the tracks is changed.

REFERENCES:
patent: 4314284 (1982-02-01), Sato et al.
patent: 4327384 (1982-04-01), Tomita et al.
patent: 4369473 (1983-01-01), Eibensteiner
patent: 4583135 (1986-04-01), Kimura
patent: 4590523 (1986-05-01), Honjo et al.
patent: 4941061 (1990-07-01), Sung
patent: 5012373 (1991-04-01), Saito
patent: 5047872 (1991-09-01), Heitmann
patent: 5157563 (1992-10-01), Nagasawa

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