Heat transfer roll

Claim 1

A HEAT TRANSFER ROLL COMPRISING: AN OUTER ROLL SHELL, AN INNER ROLL SHELL CONCENTRIC WITH SAID OUTER ROLL SHELL, ANNNULAR SPACERS SPACING SAID ROLL SHELLS APART AND FORMING AN ANNULAR LIQUID TIGHT CHAMBER CONTAINING A HEAT TRANSFER LIQUID IN THE SPACE BETWEEN SAID ROLL SHEELS, HEATING MEANS HEATING THE INNER OF SAID ROLL SHELLS AND THE HEAT TRANSFER LIQUID IN SAID ANNULAR CHAMBER, BEARING MEANS SUPPORTING SAID HEAT TRANSFER ROLL FOR ROTATION, AT LEAS TWO OPPOSITELY DISPOSED HELICAL FINS WITHIN SAID CHAMBER AND EXTENDING RADIALLY OF ONE OF SAID SHELLS TOWARD THE OTHER SHELL AND TERMINATING IN RADIALLY SPACED RELATION WITH RESPECT TO THE OTHER SHELL, SAID FINS EXTENDING HELICALLY ALONG SAID ONE OF SAID SHELLS IN OPPOSITE DIRECTIONS FROM LOCATIONS DISPOSED ON OPPOSITE SIDES OF THE TRANSVERSE CENTER OF SAID ONE OF SAID SHELLS TOWARD SAID ANNULAR SPACERS, TO CIRCULATE THE HOT LIQUID TOWARD THE COOLER ENDS OF SAID OUTER SHELL AND RETURN THE LIQUID TOWARD THE TRANSVERSE CENTER OF SAID OUTER SHELL.