Patent ID: 8047834
Filing Date: 2011-11-01
Classification: B29C,B29L,B31B

Abstract:
1. A segmented pressware die set for making pressware containers from a paperboard blank comprising: (a) a die defining a shaping recess; (b) a punch defining a shaping surface, the punch and die being mounted for reciprocal motion with respect to each other along a central axis of the die set such that the shaping surface of the punch cooperates with the shaping recess of the die to shape a paperboard blank into a pressware container during a forming cycle as the die set reciprocates over a forming stroke; (c) at least one outer ring mounted to an inner member of the punch or die adapted to reciprocate independently of the inner member of the punch or die over at least a portion of the forming stroke, (d) a plurality of guide keys mounted between an outer periphery of the inner member of the punch or die and an inner periphery of the outer ring, each guide key having a portion extending outwardly from the central axis of the die set; and wherein the guide keys are positioned, configured and dimensioned to limit rotation of the outer ring with respect to the inner member punch or die.