G - Physics – 11 – B
Patent
G - Physics
11
B
352/21.2
G11B 15/665 (2006.01) G11B 15/43 (2006.01) G11B 15/48 (2006.01)
Patent
CA 1278376
TAPE LOADING APPARATUS ABSTRACT OF THE DISCLOSURE 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device having a tape loading apparatus for withdrawing tape from an operatively positioned cassette and wrapping the withdrawn tape about a guide drum having a rotary head for recording or reproducing signals on the tape; supply and take-up reel motors apply torques to resist unwinding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.
532270
Sasao Takashi
Yoshihiro Mitsugu
Gowling Lafleur Henderson Llp
Sony Corporation
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