US 5,699,729 A · Roll having means for determining pressure distribution

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.

Claims15

Dependent claims

A system for sensing pressure in a press nip comprising:

a first roll configured with a second roll in a press nip, said first roll and said second roll adapted to rotatingly press matter therebetween, said first roll comprising at least one optical sensor disposed in a continuous helical configuration around said first roll for sensing pressure exhibited on said first roll and for providing a pressure signal representative thereof;
a processing unit for processing said pressure signal;
and
a peripheral device for providing an indication of pressure distribution, coupled to said processing unit, wherein said peripheral device signals non-uniform pressure distributions thus evidencing an operating malfunction.

1 more element

Dependencies are inferred from the claim text.

Roll having means for determining pressure distribution

Life of this patent

Roll having means for determining pressure distribution

Life of this patent

Abstract

Claims15