External heating arrangement for a paper web ceramic coated roll

Details External heating arrangement for a paper web ceramic coated roll External heating arrangement for a paper web ceramic coated roll

1991-12-11

1993-06-29

Hastings, Karen M.

Paper making and fiber liberation

Processes and products

Running or indefinite length work forming and/or treating...

100 38, 100 93RP, 162206, 1623591, 165 89, D21F 500, D21F 308

Patent

active

052230996

ABSTRACT:
The surface properties of a roll and/or rolls in a paper machine are affected by regulating the temperature of the roll face by means of an external heating device. In the arrangement, a combination of a heating device and a roll coating is used in such manner that the heating radiation penetrates through the paper or only directly to the roll face, but does not heat the roll itself at a depth greater than the roll face. The roll coating is preferably made of a dark, readily heatable and insulating material. The arrangement of the invention is utilized for example in a calendar and for detaching the paper from a roll.

REFERENCES:
patent: 4614565 (1986-09-01), Riihinen
patent: 4631794 (1986-12-01), Riihinen
patent: 4738752 (1988-04-01), Busker et al.
patent: 4748736 (1988-06-01), Miihkinen
patent: 4796342 (1989-01-01), Miihkinen
patent: 4889598 (1989-12-01), Niskanen
patent: 4948466 (1990-08-01), Jaakkola
patent: 5070587 (1991-12-01), Nakahira et al.

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