Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1992-01-02
1994-02-01
Jillions, John M.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
242 7543, 360 7302, 318 7, G11B 1543, B65H 5938
Patent
active
052825868
ABSTRACT:
A tension control apparatus for a tape player comprising a motor for driving a reel table on which a tape reel is installed, a tension detector which is pressed by a biasing force of a spring to contact with a tape extending from the tape reel, a sensor for detecting a shifting amount of the tension detector, and a servo circuit which controls a load of the motor in response to an output of the sensor. The tension control apparatus further comprises a switching device which controls the load of the motor by a voltage supplied from an electric power source other than an output voltage supplied from the servo circuit until the output voltage from the servo circuit is stabilized when shifted to a tape travelling mode. And further the tension control apparatus comprises a limiter which suppresses the output voltage from the servo circuit to be equal to or less than a predetermined value. Thus, the present invention prevents an excessive reverse torque from occurring in a motor even if the tension detector abruptly hits the tape when the operation mode shifts from a stop mode to a play mode.
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Sarudate Akiyoshi
Suzuki Masahito
Alps Electric Co. ,Ltd.
Bever Patrick T.
Darling John P.
Jillions John M.
Shoup Guy W.
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