Tape tension control for a magnetic recording and reproducing ap

Details Tape tension control for a magnetic recording and reproducing ap Tape tension control for a magnetic recording and reproducing ap

1992-05-13

1995-03-07

Gilreath, Stanley N.

Winding, tensioning, or guiding

Unwinding and rewinding a machine convertible information...

Carrier speed or tension control

2423346, 360 71, B65H 2326, G11B 1543

Patent

active

053950666

ABSTRACT:
A magnetic recording and reproducing apparatus that realizes a DTF control in a wide frequency range and a noiseless high-speed replay at several tens of times the normal replay speed without degradation of picture quality. Optimum contact between the head of the apparatus and the tape is provided at all times by performing tension control with high precision and in a wide frequency range. A pair of supply side stationary pins and a supply side movable pin driven by a supply side tape actuator is provided on the magnetic tape supply side of the head cylinder that has a rotary head. By controlling the supply side tape actuator to move the movable pin, the tension of the magnetic tape at the head cylinder can be controlled by taking into account the acceleration of the deck. When the tape is replayed at a speed different from the recording speed, the supply side tape actuator and a takeup side tape actuator are operated differentially from each other to perform good tracking.

REFERENCES:
patent: 4739948 (1988-04-01), Rodal et al.
patent: 4945426 (1990-07-01), Okamoto et al.
patent: 5032936 (1991-07-01), Fujioka et al.
Introduction of Magnetic Recording Technology by Yokoyama, published by Sogo Denshi Shuppansha, p. 187.
"Noiseless Trick-Play Techniques Using Piezoelectric Ceramic Actuator for VTR's" by M. Kobayashi et al National Technical Report, vol. 28 No. 3, Jun. 1982, pp. 419-425 and 427-428.

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