Shearing means for penetrating pulp stock on Fourdrinier machine

Details Shearing means for penetrating pulp stock on Fourdrinier machine Shearing means for penetrating pulp stock on Fourdrinier machine

1977-04-28

1979-03-20

Fisher, Richard V.

Paper making and fiber liberation

Processes and products

Running or indefinite length work forming and/or treating...

162217, 162313, 162314, 162364, 162DIG7, D21F 100, D21F 150

Patent

active

041452496

ABSTRACT:
A shear roll is situated above an upper surface of a top run of a Fourdrinier fabric such that a lower portion of the shear roll is adapted to penetrate a pulp stock web situated on the Fourdrinier fabric. The shear roll is operated by an external source of power, the source of power adapted to drive the shear roll at a surface speed exceeding a linear speed of the fabric by greater than 3% and less than 8% of the speed of the fabric. The shear roll is situated at a location where a consistency of the pulp stock web considered on a fibre basis situated on the fabric is between 2% and 5 1/2%; and the shear roll adapted to provide a shearing action to fibre bundles and flocs situated in the pulp stock web as the pulp stock web passes between the shear roll and the fabric, there re-working the pulp stock web and re-forming the fibre network and smearing the flocs thereof.

REFERENCES:
patent: 1633189 (1927-06-01), Poirer
patent: 2271351 (1942-01-01), Spencer
patent: 2274852 (1942-03-01), Spencer
patent: 3205127 (1965-09-01), Erbach
patent: 3470064 (1969-09-01), Schwerdt
patent: 3861230 (1975-01-01), Brovoll

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