Breast box nozzle for a paper machine

Details Breast box nozzle for a paper machine Breast box nozzle for a paper machine

1990-05-25

1991-04-30

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162272, D21F 102

Patent

active

050115766

ABSTRACT:
The breast box nozzle comprises a nozzle-type pulp stock duct formed by stream-guiding walls of the same width as the machine. The pulp stock duct is limited at its pulp stock discharge gap by a surface which extends over the width of the machine and is not touched by the pulp stock. Deposits in the area of the breast box nozzle which are caused by spray mists may cause defects in basis weight/cross section of the web being produced.
The precipitation of the spray mist on the surface not touched by the pulp stock is prevented by a device which discharges a gaseous fluid into the space lying in front of this surface.

REFERENCES:
patent: 1563095 (1925-11-01), Lewthwaite
patent: 2255951 (1941-09-01), Tomhund
patent: 2716927 (1955-09-01), Sullivan
patent: 3547775 (1970-12-01), Bossen et al.
patent: 4326916 (1982-04-01), Flaig et al.
patent: 4406740 (1983-09-01), Brieu
patent: 4683027 (1987-07-01), Pitkajarvi

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