Paper stock shear and formation control

Details Paper stock shear and formation control Paper stock shear and formation control

1998-01-26

2000-06-13

Grant, William

Data processing: generic control systems or specific application

Specific application, apparatus or process

Product assembly or manufacturing

700122, 700128, 700142, G06F 1900, G06G 766

Patent

active

060760222

ABSTRACT:
System and method for producing paper are provided. The system controls formation of wet stock comprising fibers on a moving water permeable wire of a de-watering machine that has a refiner that is subject to a variable load and a headbox having at least one slice, wherein each slice has an aperture through which wet stock is discharged at a certain stock jet speed onto the wire that is moving at a certain wire speed. The system includes: a) at least two water weight sensors that are positioned adjacent to the wire wherein the at least two sensors are positioned at different locations in the direction of movement of the wire and upstream from a dry line which develops during operation of the machine and the sensors generate signals indicative of a water weight profile made up of a multiplicity of water weight measurements; and b) means for adjusting at least one of the stock jet speed, wire speed, or to cause the water weight profile to match a preselected or optimal water weight profile.

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