Radially expansible holder for tubular packages

Claim 1

A CHUCK ADAPTED TO RECEIVE A TUBULAR PACKAGE, SAID CHUCK COMPRISING A SPINDLE, A TUBULAR HOUSING ROTATABLY TELESCOPED ON SAID SPINDLE, TWO BEARING ASSEMBLIES MOUNTED BETWEEN THE SAID HOUSING AND THE SAID SPINDLE AT EACH EXTREMITY THEREOF, RETAINERS MOUNTED ON THE SAID HOUSING AT EACH EXTREMITY THEREOF, TWO EXPANDER SLEEVES EACH SLIDEABLY MOUNTED ON THE SAID TUBULAR HOUSING AND EACH PROVIDED WITH A PERIPHERAL SURFACE TAPERED TOWARD THE CENTER OF THE LONGITUDINAL AXIS OF SAID CHUCK, A PLURALITY OF COILED SPRINGS POSITIONED IN COMPRESSED ENGAGEMENT BETWEEN SAID EXPANDER SLEEVES AND SAID RETAINERS, AN EXPANSION CYLINDER MOVEABLY TELESCOPED ON SAID EXPANDER SLEEVES, SAID EXPANSION CYLINDER BEING PROVIDED WITH TAPERED EXTREMITIES ADAPTED FOR SLIDEABLE ENGAGEMENT WITH THE CORRESPONDING PERIPHERAL SURFACE OF THE SAID CYLINDER SLEEVES AND TO BE HELD IN POSITION THEREBY, A CIRCUMFERENTIAL SHOULDER PROJECTING FROM THE SAID EXPANSION CYLINDER INTERMEDIATE ITS ENDS TOWARD THE LONGITUDINAL AXIS OF SAID CHUCK, A PAIR OF HOLDERS MOUNTED ON SAID HOUSING, SAID HOLDERS BEING ADAPTED FOR SLIDEABLE ENGAGEMENT WITH SAID SHOULDERS TO PERMIT RADIAL MOVEMENT AND TO ARREST AXIAL MOVEMENT OF THE SAID EXPANSION CYLINDER, A PAIR OF FLANGED COLLARS PROJECTING RADIALLY FROM THE SAID EXPANSION CYLINDER TOWARD THE SAID AXIS AND A CORRESPONDING PAIR OF FLANGED COLLARS MOUNTED ON SAID HOUSING AND ADAPTED FOR ENGAGEMENT WITH ITS CORRESPONDING FLANGED COLLAR MEMBER MOUNTED ON SAID CYLINDER TO RESTRICT RADIAL MOVEMENT OF SAID EXPANSION CYLINDER.