Single-layer or multi-layer headbox for wide flow range with adj

Details Single-layer or multi-layer headbox for wide flow range with adj Single-layer or multi-layer headbox for wide flow range with adj

1990-12-26

1991-12-24

Hastings, Karen M.

Paper making and fiber liberation

Processes and products

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

162337, 162343, 162341, D21F 106

Patent

active

050749650

ABSTRACT:
A single- or a multi-layer headbox of a paper or a board machine intended for consistencies of 0.7-2.2% and provided with a flow ratio adjustment device. The adjustment device operates by removing a part of the stock flow from the slice chamber out of the headbox in a manner that does not change the speed or turbulence of the flow going to the slice at any point of the headbox.

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patent: 4804441 (1989-02-01), Lyytinen
patent: 4880094 (1989-12-01), Weisshuhn et al.

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