Abstract: A method of cutting a magnetic recording medium comprising the steps of conveying a web by rollers to guide the web to a cutting blade; and cutting the web by the cutting blade in the lengthwise direction of the web so that magnetic recording mediums are formed, wherein a dynamic unbalance of at least a roller immediately before the cutting blade is made to be 20 g or smaller, and the roller guides the web to the cutting blade.

Abstract: A tension lever is pivoted to a chassis at one side of a reel support and has attached thereto in the vicinity of the pivoted portion opposite ends of a tension band reeved around the reel support. First and second two tension springs are provided between and fitted to a control lever and the tension lever each pivoted to the chassis and rotatable to different positions for different tape running modes. The second tension spring is fitted to the control lever with play in the direction of stretch of the spring. For reverse playback, the control lever rotates within the limits of play of the second spring to stretch the first spring only. The control lever stretches both the two springs for usual playback.

Abstract: An improved tape tension control apparatus for a VCR capable of preventing tape from getting out of a tension post due to the rapid movement of a tension arm by providing a tension arm movement delay member at the time of loading/unloading the tape, which includes a tension arm movement delay member disposed at a predetermined portion of the tension arm for preventing a rapid movement of the tension arm at the time of loading/unloading the tape.

Abstract: An arrangement for varying the tape tension in a magnetic-tape apparatus includes a pivotably supported sensing lever (15) whose free end is pressed against the magnetic tape (14) under the influence of a spring (16) and, upon deflection from a neutral position (15'), is reset to its neutral position (15') by a control device (17, 18) through a variation of the tape tension. In order to enable the tape tension to be rapidly reduced for operation in the stand-by mode, an actuating mechanism (20) can be activated separately and includes a resilient actuating lever (22) which extends into the pivoting range of the sensing lever (15) upon activation of the actuating mechanism (20) and causes this sensing lever to be deflected in opposition to the force acting on the sensing lever (15).

Abstract: The density of winding of tape onto a reel at high winding speeds is improved by oscillatory longitudinal translation of a portion of the tape, to induce tape tension oscillations. This substantially precludes slipping of the layers on the reel. To initiate the tension oscillations, a tape tension controller in a video tape recorder is vibrated by a motor whose torque is varied periodically. In another embodiment, the spindle of a guide roller is mounted for eccentric rotation by a drive motor.

Abstract: A nonlinear feedback positioning system that maintains relatively uniform tension in a web that travels between a reel and a drive at a position that is between the reel and the drive. The feedback system is designed to maintain a web loop at relatively uniform length and regulate the tension that is applied to the web that is wound on the reel.