Roll construction

Claim 1

A ROLL COMPRISING A SHAFT HAVING ENDS ADAPTED FOR ROTATABLY MOUNTING SAID SHAFT, A FIRST RIGID METALLIC SLEEVE, A PAIR OF SPACED CIRCULAR PLATE MEMBERS RIGIDLY CONNECTING EACH END OF SAID FIRST SLEEVE TO SAID SHAFT, SAID FIRST SLEEVE HAVING A GENERALLY CIRCULAR GROOVE IN THE OUTER SURFACE THEREOF ADJACENT THE ENDS OF THE SLEEVE AND A GENERALLY HELICAL GROOVE CONNECTING SAID GENERALLY CIRCULAR GROOVES, A SECOND RIGID METALLIC SLEEVE HAVING AN INSIDE DIAMETER GREATER THAN THE OUTSIDE DIAMETER OF SAID FIRST SLEEVE AND ADAPTED TO BE TELESCOPICALLY RECEIVED OVER SAID FIRST SLEEVE, A PAIR OF GENERALLY CIRCULAR GROOVES ON THE INNER SURFACE OF SAID SECOND SLEEVE AND CORRESPONDING TO THE GENERALLY CIRCULAR GROOVES IN SAID FIRST SLEEVE, EXPANSIBLE TUBING RECEIVED BETWEEN THE OUTER CYLINDRICAL SURFACE OF SAID FIRST SLEEVE AND THE INNER CYLINDRICAL SURFACE OF SAID SECOND SLEEVE IN SAID GENERALLY CYLINDRICAL END GROOVES AND SAID HELICAL GROOVE, MEANS FOR EXPANDING SAID EXPANSIBLE TUBING WHEREBY SAID SECOND SLEEVE ROTATES WITH SAID FIRST SLEEVE, AN AXIAL BORE IN EACH END OF SAID SHAFT, RADIAL BORES IN SAID SHAFT COMMUNICATING WITH EACH OF SAID AXIAL BORES, SAID RADIAL BORES BEING POSITIONED BETWEEN EACH OF SAID PAIRS OF CIRCULAR PLATES SECURING SAID FIRST SLEEVE TO SAID SHAFT, AND OPENINGS IN SAID FIRST SLEEVE TO PERMIT THE FLOW OF A HEAT EXCHANGE MEDIUM THROUGH SAID AXIAL BORES, SAID RADIAL BORES, SAID OPENINGS IN SAID FIRST SLEEVE, AND ABOUT THE EXPANSIBLE TUBINGS RECEIVED IN THE GENERALLY HELICALLY ARRANGED GROOVES.