Paper machine head box with adjustable perforated plate flow duc

Details Paper machine head box with adjustable perforated plate flow duc Paper machine head box with adjustable perforated plate flow duc

1986-12-16

1988-11-15

Lacey, David L.

Paper making and fiber liberation

Apparatus

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

162216, 162343, D21F 102

Patent

active

047847263

ABSTRACT:
A paper machine head box includes perforated plates being used as a distributor and a turbulence generator and having flow ducts, of which the ones at the edges are of different size than the remaining flow ducts. According to a preferred embodiment, slides, which are movable sideways, are provided at the ends of slice ducts at both edges of the perforated plates in order to regulate the flow. The slides and the perforated plates define the outermost flow ducts of the turbulence generator and the distributor.

REFERENCES:
patent: 2956623 (1960-10-01), Ikavalko
patent: 4137124 (1979-01-01), Bubik et al.
patent: 4432835 (1984-02-01), Waris et al.
patent: 4687548 (1987-08-01), Ilmoniemi et al.

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