Method and device in the regulation of a headbox

Details Method and device in the regulation of a headbox Method and device in the regulation of a headbox

1994-06-30

1997-10-07

Lacey, David L.

Paper making and fiber liberation

Processes and products

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

162212, 162336, 162252, 366180, D21F 106

Patent

active

056743637

ABSTRACT:
A method in the regulation of a pulp suspension flow through the headbox of a paper machine/board machine wherein an additional flow is introduced into the pulp suspension at different points across the width of the headbox. The concentration of the additional flow is regulated by a mixer unit which includes a displaceable distributor part such that when the mixing ratio is being regulated, the flow resistances of the component flows, of the additional flow, entering into the mixer unit are adjusted by displacing the distributor part of the mixer unit in a chamber of the mixer unit.

REFERENCES:
patent: 4146425 (1979-03-01), Gutzeit
patent: 4640810 (1987-02-01), Laursen et al.
patent: 4792380 (1988-12-01), Tuomikoski
patent: 4879003 (1989-11-01), Reed
patent: 5022965 (1991-06-01), Pitkajarvi
patent: 5030326 (1991-07-01), Nous
patent: 5149402 (1992-09-01), Riddick
patent: 5316383 (1994-05-01), Begeman

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