Processing rolls

Claim 1

THE COMBINATION OF (A) A HOLLOW CYLINDRICAL METAL PROCESSING ROLL ROTATABLE ON ITS AXIS AND HAVING (I) A CYLINDRICAL CAVITY THEREIN WITH AN INNER CYLINDRICAL SURFACE AND (II) A CIRCULAR AXIAL OPENING INTO AND AT EACH END OF SAID CAVITY OF SUBSTANTIALLY SMALLER DIAMETER THAN THAT OF THE CAVITY, AND (B) A REMOVABLE FLUID-CIRCULATING INSERT OF GREATER OVER-ALL DIAMETER THAN THAT OF THE SAID AXIAL OPENINGS AND CONSTRUCTED FOR INSERTION INTO AND WITHDRAWAL FROM SAID CAVITY THROUGH SAID SMALLER AXIAL OPENINGS, SAID INSERT COMPRISING (I) A FLEXIBLE THIN HOLLOW METAL CYLINDRICAL IMPERFORATE WALL MEMBER DEFINING WITH THE SAID INNER CYLINDRICAL SURFACE AN ANNULAR SPACE AND CAPABLE OF BEING DISTORTED IN SHAPE TO REDUCE THE OVER-ALL DIAMETER OF THE FLUID-CIRCULATING INSERT TO AN EXTENT WHICH ENABLES THE SAID INSERT TO BE PASSED FREELY THROUGH EITHER OF SAID SMALLER AXIAL OPENINGS, (II) A FLEXIBLE ELASTICALLY-DEFORMABLE RELATIVELY THIN TIPPED PARTITION STRUCTURE EXTENDING SPIRALLY AROUND AND ATTACHED AT ITS BASE TO THE OUTER CYLINDRICAL SURFACE OF THE SAID FLEXIBLE METAL CYLINDER AND HAVING THIN TIPPED PORTION DEFORMABLY COMPRESSED AGAINST THE SAID INNER SURFACE TO PROVIDE AN ELONGATED PASSAGEWAY FOR THE PASSAGE OF HEAT-TRANSFER MEDIUM THROUGH SAID ANNULAR SPACE, AND (III) MEANS PERMITTING THE SAID FLUID-CIRCULATING INSERT TO BE TEMPORARILY DISTORTED TO REDUCE ITS CROSS-SECTION SUFFICIENTLY TO ENABLE THE SAID INSERT TO BE PASSED READILY THROUGH SAID SMALLER AXIAL OPENINGS INTO AND OUT OF SAID CAVITY.