Electrically heated calender roll

Details Electrically heated calender roll Electrically heated calender roll

D - Textiles, Paper

21

G

D21G 1/02 (2006.01) B23P 15/00 (2006.01) D21F 5/02 (2006.01) B21B 27/08 (2006.01)

Patent

CA 2098872

A heated calender roll adapted to be used at a prede- termined operating temperature has a roll body having a cylindri- cal outer surface centered on an axis and formed radially inward from the surface with at least one axially extending passage, a pair of hub elements axially flanking and joined to the roll body, and at least one electrical heating element in the passage. A mass of heat-conducting metal in the passage has an outer sur- face bonded to but distinct from the roll body and an inner sur- face bonded to but distinct from the heating element. The metal has a melting paint in excess of the operating temperature of the roll. The calender roll can be formed with a plurality of such passages each receiving a respective such electrical heating element and a respective mass of the heat-conducting metal. Alternately it can be formed with a single such passage receiving a plurality of such electrical heating elements and the mass of the heat-conducting metal. The mass can be a pure metal or a metallic alloy chosen for high thermal conductivity.

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