Headbox with conduits having multiply connected domains

Details Headbox with conduits having multiply connected domains Headbox with conduits having multiply connected domains

1988-10-17

1991-05-28

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162216, D21F 102

Patent

active

050192159

ABSTRACT:
A headbox comprising an inlet chamber communicating with a source of fiber suspension, an outlet chamber with a discharge opening for the fiber suspension and a diffuser to establish a fluid path between the inlet and the outlet chambers. The diffuser includes a cluster of tubes, each being divided in two successive portions of larger cross-sectional area separated by a step-like transition. Each tube comprises a stem mounted in the initial portion thereof to define a ring shaped fiber suspension passage.

REFERENCES:
patent: 3272233 (1966-09-01), Trufitt
patent: 3514372 (1970-05-01), Boyce et al.
patent: 3725197 (1973-04-01), Dahl et al.
patent: 3769153 (1973-10-01), Hill
patent: 4087321 (1978-02-01), Schultz et al.
patent: 4104116 (1978-08-01), Koskimies
patent: 4146427 (1929-03-01), Hogel et al.
patent: 4566945 (1986-01-01), Ewald et al.
patent: 4765868 (1988-08-01), Fukiwara

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