Heated roller and method for its operation

Details Heated roller and method for its operation Heated roller and method for its operation

1990-08-15

1991-12-31

Hastings, Karen M.

Paper making and fiber liberation

Processes and products

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

291162, 100 38, 100 43RP, 162290, 162359, 165 90, D21G 102, F28F 502

Patent

active

050768913

ABSTRACT:
The present invention is directed to a heated sag-compensation roller, with short heat-up and cool-down times and a more even temperature distribution, which reduces the risk of damage to the roller shell. These improvement are achieved by the roller shell being heated or cooled from the inside and the outside simultaneously. The heating devices can be controlled so that the temperature difference between the inside and outside does not exceed a particular value.

REFERENCES:
patent: 4016030 (1977-04-01), Sobata
patent: 4282638 (1981-08-01), Christ et al.
patent: 4282639 (1981-08-01), Christ et al.
patent: 4498383 (1985-02-01), Pav et al.
patent: 4675487 (1987-06-01), Verkasalo
patent: 4679287 (1987-07-01), Allard
patent: 4729153 (1988-03-01), Pav et al.
patent: 4775773 (1988-10-01), Verkasalo
patent: 4964202 (1990-10-01), Pav et al.
patent: 4976820 (1990-11-01), Laapotti

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