Method for Reducing Tape Tension Transients
Original Publication Date: 1984-May-01
Included in the Prior Art Database: 2005-Feb-04
In a self-threading reel-to-reel tape transport in which a leader block is attached to one end of the tape it is necessary to ensure that the leader block is securely engaged in a take-up reel. One method of providing positive loading of the leader block is to slightly overdrive a gear drive for the leader block to thereby preload the gears. However, this preloading of the gears can create stress and tension transients in the tape when the tape is rewound and the leader block is to be removed from the take-up reel. These stress and tension transients can be eliminated by removing the preloading on the gears prior to removal of the leader block. The figure shows schematically a self-threading reel-to-reel tape drive in which a leader block 1 is driven onto a take-up reel 2 by means of a pantograph camming arrangement.