| 摘要 |
<p>A pin-type punch having an arm pivotal on a base in which the punch pins for punching sheets of paper are located on the arm or on the base and die holes on are located the opposite part. To create alignment of pin-to-hole, one or the other is mounted on or is in a floating unit. Each unit is caused to float by being positioned by engagement of punch alignment pieces just prior to the pins passing through the paper into the die holes.</p> |
