Electrically heated calender roll

Details Electrically heated calender roll Electrically heated calender roll

1993-06-21

1995-03-14

Cuda, Irene

Roll or roller

With heating, cooling, or heat transfer means

492 9, 492 10, B21B 3108

Patent

active

053972902

ABSTRACT:
A heated calender roll at a predetermined operating temperature has a roll body having a cylindrical 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 surface bonded to but distinct from the roll body and an inner surface bonded to but distinct from the heating element. The metal has a melting point 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.

REFERENCES:
patent: 4285107 (1998-08-01), Kusters et al.
patent: 4348819 (1982-09-01), Gamble
patent: 4614565 (1986-09-01), Riihinen
patent: 4631792 (1986-12-01), Wesemann et al.
patent: 4734966 (1988-04-01), Zaoralek
patent: 4888464 (1989-12-01), Shibata et al.
patent: 5153660 (1992-10-01), Goto
patent: 5171404 (1992-12-01), Ellis et al.
patent: 5177552 (1993-01-01), Isogai et al.

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