Hydraulic headbox and a gas enclosure communicating therewith

Details Hydraulic headbox and a gas enclosure communicating therewith Hydraulic headbox and a gas enclosure communicating therewith

1976-02-19

1977-12-20

Fisher, Richard V.

Paper making and fiber liberation

Apparatus

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

162343, D21F 102

Patent

active

040639975

ABSTRACT:
A paper machine has an enclosure for containing a gas under pressure. A hydraulic headbox of the paper machine includes a slice as well as a conductor structure for conducting suspension to the slice and a distributor structure for distributing suspension as uniformly as possible to the conductor structure to be conducted thereby to the slice. The gas enclosure and distributor structure respectively have hollow interior portions communicating with each other so as to provide for the suspension in the distributor portion a free surface acted upon by gas under pressure in the enclosure so that this latter gas under pressure will act as a gas cushion for damping pressure variations in the stock suspension.

REFERENCES:
patent: 2934142 (1960-04-01), Ikavalko
patent: 2973034 (1961-02-01), White, Jr.
patent: 3216892 (1965-11-01), Wahlstrom et al.
patent: 3461031 (1969-08-01), Reitzel
patent: 3536581 (1970-10-01), Wolf
patent: 3853697 (1974-12-01), Parker et al.
patent: 3945882 (1976-03-01), Egelhof et al.

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