Method in the regulation of a multi-layer headbox and a multi-la

Details Method in the regulation of a multi-layer headbox and a multi-la Method in the regulation of a multi-layer headbox and a multi-la

1994-06-30

1996-02-13

Lacey, David L.

Paper making and fiber liberation

Processes and products

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

162343, 162344, 162336, 162123, 162125, D21F 106

Patent

active

054909058

ABSTRACT:
A method and device for the regulation of a pulp suspension flow in a multi-layer headbox and a multi-layer headbox for a paper machine/board machine. For the formation of different layers in the web, at least two pulp suspensions having different pulp concepts flow through the multi-layer headbox. The flow of a pulp suspension that forms one of the layers in the web is regulated by regulating the component flows that constitute this flow and regulating the concentration of the component flows independently from one another. In this manner, i.e., by regulating only this the particular layer, the total flow of the pulp suspension leaving the headbox is regulated.

REFERENCES:
patent: 4146425 (1979-03-01), Gutzeit
patent: 4198270 (1980-04-01), Kurtz et al.
patent: 4640810 (1987-02-01), Laursen et al.
patent: 4792380 (1988-12-01), Tuomikoski
patent: 5030326 (1991-07-01), Nous
patent: 5110416 (1992-05-01), Linsuri et al.
patent: 5316383 (1994-05-01), Begemann

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