| 摘要 |
A high speed solenoid operated punch for paper tape or the like in which a relatively weak spring is provided to normally hold the punch in retracted position and to take up clearances in the punch linkage. A second stiffer, cantilever type spring is engaged by the punch linkage only after the punch has partially sheared through the tape and, finally, a much stiffer cantilever type spring is engaged after the punch passes completely through the tape to arrest the punch and to catapult the same back to its retracted position, aided by the second spring.
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