Paper making and fiber liberation – Processes and products – Running or indefinite length work forming and/or treating...
Patent
1996-05-17
1998-08-11
Hastings, Karen M.
Paper making and fiber liberation
Processes and products
Running or indefinite length work forming and/or treating...
162259, 162323, 162336, D21F 106
Patent
active
057923191
ABSTRACT:
A method and apparatus is disclosed for controlling the flow of stock mixture through an enclosed head box chamber, such as in a paper-making machine, and onto a forming surface thereof. A plurality of plates are arranged in the chamber to extend transversely across the chamber, with the top edges of the plates and the inner wall of the chamber defining therebetween an opening through which the stock mixture flows. The plates are selectively moved toward and away from the inner wall to vary the configuration of the opening and, thus, control the flow of stock mixture through the openings such that selective movement of selected plates controls the cross-sectional flow profile across the width of the chamber and, correspondingly, controls the cross-sectional flow across the width of the outlet from the chamber and onto the surface forming the sheet material.
REFERENCES:
patent: 1240589 (1917-09-01), Murray
patent: 2540301 (1951-06-01), Staege
patent: 3413192 (1968-11-01), Beecher
patent: 4539074 (1985-09-01), Stenberg
patent: 4574033 (1986-03-01), Myren
patent: 5071514 (1991-12-01), Francis
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