Presses – Automatic or material triggered control – Of roll separation or speed
Reexamination Certificate
2005-02-08
2005-02-08
Ostrager, Allen (Department: 3725)
Presses
Automatic or material triggered control
Of roll separation or speed
C100S16300R, C100S168000
Reexamination Certificate
active
06851356
ABSTRACT:
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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Nguyen Jimmy T
Ostrager Allen
Voith Paper Patent GmbH
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