| 摘要 |
<p>PUNCH RETAINER A punch and retainer assembly wherein the punch has a flattened surface at the upper end ofthe side wall thereof and a radially inwardly extending recess directly below the flattened side wall portion. The punch retainer includes a vertically movable latch adapted to engage within the recess on the shank of the punch and retain the punch within the retainer block. Means are provided for limiting vertical movement of the latch so that the punch can be inserted into the retainer only when the flattened surface thereof is aligned parallel with the pivot axis of the latch. i.</p> |
