Title: Shearing means for penetrating pulp stock on Fourdrinier machine

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.

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Inventors: Hansen, Victor E. (Jacksonville, FL, US)

Application Number: 791943
Filing Date: 1977-04-28
Publication_date: 1979-03-20
Assignee: JWI Ltd. (Montreal, CA)
Primary Class(es): 162/210 162/217, 162/313, 162/314, 162/364, 162/DIG7
Other Classes:
US Patent Ref:

1633189	Jun, 1927	Poirer	162/364.
2271351	Jan, 1942	Spencer	162/314.
2274852	Mar, 1942	Spencer	162/314.
3205127	Sep, 1965	Erbach	162/351.
3470064	Sep, 1969	Schwerdt	162/314.
3861230	Jan, 1975	Brovoll	162/273.

Other Refs: 567797639669639672

Mar, 1945	GB.
Jul, 1950	GB.
Jul, 1950	GB.

Primary Examiner: Fisher, Richard V.
Assistant Examiner:
Attorney: Brown; Charles E.