Method and apparatus for calendering paper webs or the like

Details Method and apparatus for calendering paper webs or the like Method and apparatus for calendering paper webs or the like

1980-09-29

1982-04-27

Wilhite, Billy J.

Presses

Methods

Forcing through constricted passage

100162R, B30B 304

Patent

active

043264565

ABSTRACT:
Method and apparatus for calendering paper webs or the like wherein a plurality of hard calendering rolls are situated to constitute a roll stack and wherein a plurality of soft calender rolls are situated in nip defining relationship with respective ones of the hard rolls whereby a plurality of corresponding hard and soft or supercalender nips are defined. The apparatus is adapted to be directly associated with a paper machine and force apparatus are provided in conjunction with the apparatus for supporting the hard and soft calender rolls so that the hard nips are closed and the soft nips are open during threading of the web through the apparatus during the start-up phase while the hard nips are opened and the supercalendering nips are closed after the web is threaded in order to perform continuous supercalendering of the paper web.

REFERENCES:
patent: 3905288 (1975-09-01), Holm
patent: 4128053 (1978-12-01), Kankaanpaa

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