Stock formation in a paper making process

Details Stock formation in a paper making process Stock formation in a paper making process

1976-11-02

1979-02-20

Fisher, Richard V.

Paper making and fiber liberation

Processes and products

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

162217, 162352, 162374, D21F 120, D21F 152

Patent

active

041405730

ABSTRACT:
The paper-making stock on a paper machine is improved by running the forming fabric, carrying the stock, as a layer of a dilute aqueous dispersion of fibers, over a modified low-vacuum suction box having a slotted cover made up of elongated blades dividing the suction area into a grid. The surfaces of some of the blades support the fabric and the surfaces of others are lowered a small amount to allow the fabric to undulate and agitate the stock without substantially changing the grid area of the drainage surface. The lower level surfaces form a fluid seal with the undersurface of the fabric.

REFERENCES:
patent: 1917098 (1933-07-01), Cofrin
patent: 3102066 (1963-08-01), Justus
patent: 3743574 (1973-07-01), Walser et al.
patent: 3874998 (1975-04-01), Johnson
patent: 3922190 (1975-11-01), Cowan

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