Magnetic recording and reproducing apparatus

Details Magnetic recording and reproducing apparatus Magnetic recording and reproducing apparatus

1986-07-18

1988-03-29

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

G11B 503

Patent

active

047347988

ABSTRACT:
A helical scan type of recording apparatus includes means for controlling the supply of recording current to one or more rotary recording heads and erase current to one or more erase heads whose width is selected to produce erasure of each tape signal track twice in succession, the control being executed such that when recording is to be ended, the erase current supply is first terminated and thereafter the recording supply current is terminated after a specific time interval has elapsed, thereby eliminating from the end of each recorded portions the occurrence of a short tape segment which has been erased and not thereafter recorded on. Disturbances during playback, e.g. of a displayed video signal, are thereby eliminated.

REFERENCES:
patent: 4455582 (1984-06-01), Yunagida et al.
patent: 4622614 (1986-11-01), Yamashira et al.

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