Flutter compensated magnetic tape transducing drive apparatus

摘要

To prevent external acceleration or deceleration forces from affecting the linear speed of a tape of a tape transport mechanism, counter-rotating masses are formed by the counter or pressure roller (13) engaging the tape and pressing the tape against the capstan (4'), the respective moments of inertia about the respective axes of rotation, and the respective radii being selected in accordance with the relationship <IMAGE> wherein j1 is the moment of inertia of the drive system about the axis of rotation of the drive capstan (4'); r1 is the radius of the drive capstan (4'); j2 is the moment of inertia of the counter or pressure roller (13) about its axis of rotation (14); and r2 is the radius of the counter or pressure roller (13).