Movable tape-guide control system

Details Movable tape-guide control system Movable tape-guide control system

1981-03-03

1983-06-21

Wolff, John H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

36013022, G11B 1532, G11B 1700, G11B 1902

Patent

active

043896847

ABSTRACT:
A movable tape-guide control system for a helical scan type magnetic recording and reproduction apparatus, which control system is capable of detecting the time when an end portion of the magnetic tape will pass over a rotary head drum during the rewinding of the magnetic tape, and moving a guide post for guiding the magnetic tape from the rotary head drum before the end portion of the magnetic tape passes between the guide post and the rotary head drum, whereby jamming of the magnetic tape between the guide post and the rotary head drum is prevented and accordingly damage to the video head by the jammed magnetic tape or the end portion thereof is prevented. The advanced detection of the end portion of the magnetic tape is performed by monitoring when the running speed of the magnetic tape increases in comparison with the rotation speed of the magnetic tape reel by a predetermined ratio.

REFERENCES:
patent: 3388221 (1968-06-01), Johnson
patent: 3831198 (1974-08-01), Kihara et al.
patent: 4249222 (1981-02-01), Iwasaki

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