| 摘要 |
A pinch roller cooperating with the drive capstan of a tape playback apparatus includes a spool on which there is mounted a resilient tire member to selectively engage the capstan with a magnetic tape held between the tire and the capstan when in a driving position. The tire includes a circumferentially extending recess formed therein having a crowned surface for self-centering of the tape thereon, and a pair of annular shoulders spanning opposite sides of said recess for positively engaging the capstan on opposite sides of the tape thereby transmitting drive forces from the capstan to the side of the tape opposite the capstan through the tire. The spool includes slots communicating with the inner surfaces of the tire permitting a bonding agent to securely bond the tire to the spool.
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