Secondary headbox for overlay application in board formation

Details Secondary headbox for overlay application in board formation Secondary headbox for overlay application in board formation

1973-04-06

1976-09-07

Bashore, S. Leon

Paper making and fiber liberation

Apparatus

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

162342, 162346, D21F 100

Patent

active

039792544

ABSTRACT:
A secondary headbox is described which is capable of handling water slurries of relatively high solids consistencies and applying the slurries to a base sheet as it is being formed on conventional fourdrinier equipment in the manufacture of a board product. The secondary headbox includes means whereby the slurry is mixed and evenly distributed across its width and means whereby the thus treated slurry is further treated to remove any turbulence and to controllably feed the slurry onto the base sheet on a fourdrinier wire passing beneath the secondary headbox.

REFERENCES:
patent: 1727928 (1929-09-01), Berry
patent: 2390977 (1945-12-01), Williams
patent: 2782692 (1957-02-01), Boronow et al.

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