System for adjusting tension in a tape

摘要

A system for adjusting the tension of a tape in a magnetic tape record/playback device includes a feed spool, a take-up spool and a motor for feeding the tape between the spools in a forward direction and a reverse direction. A tension sensor senses the tension in the tape as the tape is fed in the forward direction. The tension sensor is locked in its last existing position when the tape direction is changed from the forward direction to the reverse direction. A slip coupling applies a pre-adjusted tension to the tape when the tape is fed in the reverse direction.