| 摘要 |
The invention concerns a gradient calender, comprising two calender rolls (1, 2) which form a calendering nip (N) between them, of which calender rolls at least one roll is a hard-faced calender roll which can be heated to a high temperature, the paper web (W) or equivalent being passed through the calendering nip (N) for hot calendering of the web (W). At least one of the calender rolls (1, 2) is arranged to be loaded towards the calendering nip (N) by means of a variable-crown support roll (5, 6) so that the auxiliary nip (N1, N2) between said support roll (5, 6) and the corresponding calender roll (1, 2) forms a common nip plane (A) with the calendering nip (N). Deflection of the calendering nip (N) and of the calender rolls (1, 2), respectively, is substantially prevented by the effect of the load produced by means of the hydraulic loading means (9, 13) in the support roll/rolls (5, 6).
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