Roll having means for determining pressure distribution

Details Roll having means for determining pressure distribution Roll having means for determining pressure distribution

1994-09-16

1997-01-14

Gerrity, Stephen F.

Presses

With alarm, signal, indicator, or test means

7386255, 7386268, 100153, 100176, 492 10, 492 20, B30B 304, G01L 500

Patent

active

055928757

ABSTRACT:
A roll system for use particularly in a papermaking press nip for dewatering a fibrous web, comprising a roll disposed so as to rotatingly cooperate with another roll in a press nip, the roll having a helical sensor for sensing pressure exhibited on the roll, and transmitting pressure signals to a processor as the roll rotates. Trigger signals are generated at certain times as the roll rotates, the time of the occurrence of the trigger signal representing a specific location on the helical sensor. The pressure signals are coordinated with the trigger signals, such that the pressure corresponds to the angular position of the roll where it is sensed. The operator may thus be given a visual or audible indication of the existence of non-uniformities in pressure sensed at various locations along the roll, thereby enabling corrective action to be initiated if necessary.

REFERENCES:
patent: 3962911 (1976-06-01), Grenlund
patent: 4016756 (1977-04-01), Kunkle
patent: 4233011 (1980-11-01), Bolender et al.
patent: 4509237 (1985-04-01), Volz et al.
patent: 4729153 (1988-03-01), Pav et al.
patent: 4898012 (1990-02-01), Jones et al.
patent: 5048353 (1991-09-01), Justus
patent: 5379652 (1995-01-01), Allonen
patent: 5383371 (1995-01-01), Laitinen

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