Method and apparatus for reducing vibration in the press...

Details Method and apparatus for reducing vibration in the press... Method and apparatus for reducing vibration in the press...

D - Textiles, Paper

21

F

92/21

D21F 3/00 (2006.01) D21F 3/04 (2006.01)

Patent

CA 2025447

Method and apparatus for reducing vibration in the press section of a high speed papermaking machine. The press section has at least one dewatering felt with means such as a trade line for indicating the orientation of the felt in the press section. The press section includes means for adjusting the trade line orientation as the felt cycles in a continous loop through the press section. Barring of the felt, i.e., introduction of thickness variations in the felt by resonant vibrations in the nip, is minimized by progressively altering the trade line orientation as the felt cycles through the press section, the trade line orientation adjustment being accomplished at a rate adequate to iron out bars formed on previous passes and prevent resonant buildup of bars in the felt during operation of the papermaking machine.

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