Method in the calendering of paper or of an equivalent web...

Details Method in the calendering of paper or of an equivalent web... Method in the calendering of paper or of an equivalent web...

D - Textiles, Paper

21

G

D21G 1/00 (2006.01)

Patent

CA 2365458

The calender comprises a frame (11;11a), a variable-crown upper roll (13;13a), a variable-crown lower roll (14;14a) and two or more intermediate rolls (15...22;15a...22a) fitted between the upper (13;13a) and lower (14;14a) rolls. The upper, lower and intermediate rolls are arranged on the frame (11;11a) of the calender as a stack of rolls (12;12a) and being in nip contact with one another to form calendering nips (N1...N9) between the rolls. Hard- and soft-faced rolls are used on the intermediate rolls in which the form of the natural deflection line produced by their own gravity is substantially equal and the nip loads produced by the masses of the intermediate rolls and of the auxiliary equipment related to them are relieved.

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