Calender and process for arranging rolls in a stack

Details Calender and process for arranging rolls in a stack Calender and process for arranging rolls in a stack

D - Textiles, Paper

21

G

D21G 1/00 (2006.01)

Patent

CA 2393211

Calender with a roll stack and process for arranging rolls in a roll stack of a calender, the calender comprising two end rolls in a press plane and a plurality of middle rolls between the two end rolls. At least one of the middle rolls has an elastic surface and has a displacement (x) relative to the press plane, the size of the displacement (x) being selected based on a wavelength of a critical natural frequency within the roll stack. The end rolls and the at least one middle roll define two nips therebetween, the displacement (x) effecting a difference in distance of a fraction of a wavelength on a surface of the at least one middle roll between the two nips. An adjusting device adjusts the displacement of the at least one middle roll on the basis of a preset displacement (x), which depends on the wavelength.

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