Headbox turbulence generator

Details Headbox turbulence generator Headbox turbulence generator

1998-07-06

2000-08-08

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162336, D21F 102

Patent

active

060996927

ABSTRACT:
A headbox of a paper or board machine having an inlet, a distributor for feeding stock suspension to be distributed over the machine width into the inlet. A turbulence generator downstream of the distributor has a hydraulic diameter of less than 17 mm in the downstream end region. The hydraulic diameter is the diameter of individual channels through the turbulence generator. The turbulence generator has channels or plates that define several channels, each in accordance with the desired hydraulic diameter. Dimensions of the hydraulic diameter are disclosed. The turbulence generator has lands at the downstream end. The land area ratio is disclosed. A nozzle or the like downstream of the turbulence generator introduces the stock suspension over the machine width to a wire or wires of the next section.

REFERENCES:
patent: 3098787 (1963-07-01), Sieber
patent: 4070238 (1978-01-01), Wahren
patent: 4104116 (1978-08-01), Koskimies
patent: 4225386 (1980-09-01), Edblom et al.
patent: 4687548 (1987-08-01), Ilmoniemi et al.
patent: 5110416 (1992-05-01), Linsuri et al.
patent: 5316383 (1994-05-01), Begemann et al.
patent: 5695611 (1997-12-01), Bubik et al.

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