Patent ID: 6367733
Filing Date: 2002-04-09
Classification: B65H

Abstract:
A core chuck comprising:an elongated mandrel having a longitudinal axis, a first end, a second end, and an outer surface defining a set of longitudinally extending lobes from said first and to said second end; a set of arcuate friction plates mounted on and together defining a shell about said mandrel, each of said friction plates having an interior surface for engaging said lobes and an exterior surface for engaging the inside of a core in which said core chuck is disposed, said interior surface of each of said friction plates being contoured to conform to the shape of a corresponding one of said lobes; said friction plates being circumferentially slidable about said mandrel between a first position wherein said friction plates form a shell having a first diameter and a second position wherein said friction plates form a shell having a second diameter greater than said first diameter; each of said friction plates being disposed on a corresponding lobe of said mandrel in said first position, and spanning a pair of adjacent lobes in said second position; said core chuck being insertable in and removable from a core when said friction plates are in said first position and being frictionally locked within the core when said friction plates are in said second position.