PAPER STOCK SHEAR AND FORMATION CONTROL

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 (76) that has a refiner that i s subject to a variable load and a headbox (74) having at least one slice, wherein each slice has...

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Bibliographic Details
Main Authors HAGART-ALEXANDER, CLAUD, HU, HUNG-TZAW, WATSON, DAVID
Format Patent
LanguageEnglish
French
Published 08.09.2009
Subjects
ACCESSORIES FOR PAPER-MAKING MACHINES
CALENDERS
METHODS OF PRODUCING PAPER THEREON
PAPER-MAKING
PAPER-MAKING MACHINES
PRODUCTION OF CELLULOSE
TEXTILES
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Summary: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 (76) that has a refiner that i s subject to a variable load and a headbox (74) 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 (84) that are positioned at different locations in the direction of movement of the wire and upstream from a dry line which develop s 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 (102); and (b) means (110) 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.
Bibliography:Application Number: CA19992318974