Apparatus for damping pressure fluctuations in pulp suspension f

Details Apparatus for damping pressure fluctuations in pulp suspension f Apparatus for damping pressure fluctuations in pulp suspension f

1977-10-05

1979-10-02

Fisher, Richard V.

Paper making and fiber liberation

Apparatus

Slurry supply conditioning or condition maintaining

138 26, 138 30, D21F 106

Patent

active

041697570

ABSTRACT:
An apparatus for damping pressure fluctuations in the pulp-suspension flow of a paper machine includes a pipe system which delivers the pulp suspension to a headbox and in the interior of which the pulp suspension flows toward the headbox. A portion of the pipe system is surrounded by a gas, such as air, which is under pressure and which is situated within a suitable enclosure. This portion of the pipe system is formed at least in part by an elastic wall structure, the inner surface of which engages the pulp-suspension flow and the outer surface of which is exposed to the gas under pressure. Thus, the elastic wall structure changes its configuration or geometry due to pressure fluctuations in the pulp-suspension flow while the gas under pressure which acts through the elastic wall structure on the pulp suspension serves to damp the pressure fluctuations.

REFERENCES:
patent: 2448118 (1948-08-01), Pellettere
patent: 3473565 (1969-10-01), Blendermann
patent: 3563852 (1971-02-01), Rojecki
patent: 4030971 (1977-06-01), Justus

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