Patent ID: 6536321
Filing Date: 2003-03-25
Classification: B23D,B26F,Y10T

Abstract:
A paper punch machine die assembly system comprising:a die assembly comprising: a front portion and a back portion; wherein said front portion comprises an elongated die having a longitudinal axis, a slot parallel to the longitudinal axis for receiving paper and a plurality of die holes extending perpendicularly to the longitudinal axis; and wherein said back portion comprises: an elongated pin-retainer plate generally parallel to said elongated die and having a front surface, a back surface, a longitudinal axis, and a plurality of retainer holes extending through said plate from the back surface to the front surface; a plurality of punch pins slidably extending through said retainer holes, each punch pin having a first end with a head in back of said plate and abutting said plate back surface and a second end extending from said plate front surface to said elongated die and slidably received in one of said die holes; and a clamp system comprising a pivot bar assembly pivotally connected to a housing of the paper punch machine and adapted to pivot toward and releaseably clamp against said die assembly, the pivot bar assembly comprising a pivot bar with a resilient portion for compensating for wear of the pivot bar assembly to maintain tight clamping against the die assembly after wear of the pivot bar assembly.