| 摘要 |
<p>A punching device comprising a punching assembly comprising a plurality of individual punch members (8) carried on a mounting plate (6), for movement through apertures in a guide plate (10), through a punching slot (12) into which a stack of material to be punched may be fed, and into guide apertures (14) in a base plate (15). The punches are moved from their advanced positions by the application of force to an operating member (16), conveniently by the use of force transmitting members (18). Interposed between the force transmitting means and the punches is a vibrating means (18) to apply vibrations to each punch member during movement of the punching assembly from its retracted to its advanced position. The vibration means may be mechanical, electrical, or at ultrasonic frequency.</p> |
