Headbox with a vertical partition between perforated rolls

Details Headbox with a vertical partition between perforated rolls Headbox with a vertical partition between perforated rolls

1993-12-15

1995-06-13

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162216, D21F 102

Patent

active

054239486

ABSTRACT:
A headbox for a paper machine, with a main chamber through the lower part of which flows fiber suspension in the longitudinal machine direction. The main chamber has on the upstream end a first perforated roll and a machine-wide feed channel as well as on the downstream end a second perforated roll and a machine-wide nozzle type outlet channel. Provided between the perforated rolls is a vertical partition which is vertically adjustable, creating between the bottom of the main chamber and the partition a machine-wide channel section which is variable in its height. The downstream outside surface of the partition has a plurality of abutted curved surfaces, in a fashion such that the clearance of the channel section increases in the direction of flow.

REFERENCES:
patent: 2881674 (1959-04-01), Johnson et al.
patent: 3164513 (1965-01-01), Calehuff

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