Cooling of a paper web in a supercalender

Details Cooling of a paper web in a supercalender Cooling of a paper web in a supercalender

1985-11-15

1988-04-19

Feldman, Peter

Presses

Methods

With heating or cooling

100 93RP, 162206, B30B 304, B30B 1300, B30B 1534

Patent

active

047381973

ABSTRACT:
The invention relates to a method for accomplishing smoothness and glaze to paper or board webs in a calender by leading a web through hot nips which are formed between cooperating rolls of different hardnesses and having adjustable temperatures, and where a gradient calendering of the web based on the temperature difference between the web and the rolls is brought about. In order to increase the efficiency of the gradient calendering and in order to achieve a suitable temperature difference between the web and the heated rolls, the temperature of the web is arranged to be adjustable before the web enters the hot nip.

REFERENCES:
patent: 1862656 (1932-06-01), Boyer
patent: 3352232 (1967-11-01), Leibelt
patent: 3451331 (1969-06-01), Fredrickson et al.
patent: 4277524 (1981-07-01), Nakajima et al.
patent: 4370923 (1983-02-01), Schmidt

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