Damping system for a paper machine headbox

Details Damping system for a paper machine headbox Damping system for a paper machine headbox

1981-10-26

1984-01-17

Alvo, Steve

Paper making and fiber liberation

Apparatus

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

162337, 162340, 162343, D21F 102

Patent

active

044262574

ABSTRACT:
A system for damping the pressure fluctuations in a paper machine headbox. The headbox applying the damping system comprises an equalizing chamber communicating with an air space, this equalizing chamber having an outlet/outlets for a channel/channels leading to the equalizing chamber as well as an inlet/inlets for a channel/channels leaving the equalizing chamber. The outlet chamber is disposed with regard to the inlet channel so, and the cross surfaces of the outlet and inlet channels have been dimensioned so that the jet of stock flowing out of the outlet and expanding divergently falls substantially inside the boundaries of the inlet.

REFERENCES:
patent: 3098787 (1963-07-01), Sieber
patent: 3400044 (1968-09-01), Justus
patent: 3725197 (1973-04-01), Dahl et al.
patent: 4162189 (1979-07-01), Kirjavainen
patent: 4166759 (1979-09-01), Kirjavainen
patent: 4202724 (1980-05-01), Kirjavainen

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