Headbox for a paper-making machine

Details Headbox for a paper-making machine Headbox for a paper-making machine

1992-11-05

1994-03-29

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162339, 162340, 162343, D21F 102

Patent

active

052981266

ABSTRACT:
In a headbox for a paper machine a hydraulic headbox is combined with an apertured roller headbox, with at least one movable insert part (15) through which the material suspension (5) can flow being provided in the region of the flow channel (4) and/or of the nozzle channel (18) and with the flow channel (4) having a cross section through which flow takes place which broadens over at least a substantial part of its length in the direction of flow up to the moveable insert part (15).

REFERENCES:
patent: 2881674 (1959-04-01), Johnson et al.
patent: 3165438 (1965-01-01), Dennis et al.
patent: 3445331 (1969-05-01), Lee et al.
patent: 3743571 (1973-07-01), Ward
patent: 3888729 (1975-06-01), Parker et al.
patent: 4445975 (1984-05-01), Kurtz
patent: 4971659 (1990-11-01), Takeuchi
patent: 4980027 (1990-12-01), Keller

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