Tape loading apparatus

Details Tape loading apparatus Tape loading apparatus

1987-03-16

1988-07-19

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 85, G11B 1543, G11B 15665

Patent

active

047589124

ABSTRACT:
In a magnetic tape cassette recording and/or reproducing device having a tape loading apparatus for withdrawing tape from an operatively positioned cassette and wrapping the withdrawn tape about a guide drum having a rotary head for recording or reproducing signals on the tape; supply and take-up reel motors apply torques to resist unwinding of the tape from supply and take-up reels in the operatively positioned cassette, a servo-control maintains the supply reel in a stopped condition during a loading operation, the ratio of currents supplied to the supply and take-up reel motors, respectively, for achieving the stopped condition of the supply reel and for applying a constant torque to the take-up reel is determined and the radius of the tape wound on one of the reels is calculated from such ratio, whereupon, a value of the torque that has to be applied to that one reel for maintaining a predetermined tension in the tape during the loading operation is calculated in accordance with the calculated radius of the tape wound on that one reel.

REFERENCES:
patent: 4370682 (1983-01-01), Katoh
patent: 4636887 (1987-01-01), Kato et al.
patent: 4686591 (1987-08-01), Kobayashi et al.

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