Abstract: A cassette tape recorder has function of eliminating the slack of magnetic tape between supply reel and take-up reel in advance before the magnetic tape is started to transfer in the required direction for recording or reproducing. When the tape cassette is placed in "play" position, supply reel is rotated first in backward direction to eliminate the slack of the magnetic tape. The tensioned magnetic tape, then, may cause the take-up reel to rotate in the rewind direction. A detection device is provided to discriminate the rotation of the take-up reel in the backward direction. The detection device causes a control device for drive motor to switch the rotating direction of the motor so as to reverse the rotating direction of the capstan and the take-up reel.

Abstract: A tape recording and reproducing apparatus utilizing a tape cassette is disclosed which eliminates the tape slack between supply reel and take-up reel. When the tape cassette is placed in the play position, the take-up reel is rotated in the forward direction to remove the tape slack. Then the supply reel is started to rotate by the stretched tape. A detecting device is provided to detect the rotation of the supply reel in the forward direction. The detecting device triggers a control device which in turn causes the tape transport mechanism to come into engagement with the tape ordinary play mode.