Patent ID: 6792840
Filing Date: 2004-09-21
Classification: B26D,B31B,Y10T

Abstract:
A plunger assembly for gripping blanking material during a blanking operation, said plunger assembly comprising:a base member; a pivoting gripper member; a biasing device; and at least one pair of connecting legs, said at least one pair of connecting legs including a gripper leg and a base leg pivotally connected to one another, said gripper leg also being pivotably connected to said pivoting gripper member, said base leg also being pivotably connected to said base member, and said pivoting gripper member being pivotable with respect to said gripper leg through a predetermined pivot angle range, said gripped leg and said base leg being pivotable with respect to one another for changing a distance between the pivoting gripper member and the base member, thereby selectively effecting a folding and unfolding of the plunger assembly during a blanking operation, wherein the biasing device biases the pivoting gripper member away from the base member.