Head box with reducing stream gate

Details Head box with reducing stream gate Head box with reducing stream gate

1990-01-29

1990-11-20

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162336, 162344, D21F 106

Patent

active

049716590

ABSTRACT:
A head box has a dispersing section provided with a numerous paper material slurry flowing pores at an inlet side of a paper material slurry passage leading to a slurry slip. A reduced stream section is disposed at an outlet side of the dispersing section. The reduced stream section is adapted to reduce the distance of the paper material slurry passage. An evener chamber is formed between an inlet side of the reduced stream section and an outlet side of the dispersing section. A reduced stream gate is disposed at the reduced stream section. The reduced stream gate is adapted to regulate the distance of the reduced stream section. The reduced stream gate is disposed on a bottom surface of the reduced stream section. The reduced stream gate is provided with a shaft portion pivotable about a fixed supporting point and a circular arcuate gate portion formed in concentric with and projected from the shaft portion along a circular arcuate surface of the shaft portion. The reduced stream gate is disposed such that the circular arcuate gate portion is integrally pivoted with the shaft portion to expand an end portion of the gate into the reduced stream section from the bottom surface of the reduced stream section.

REFERENCES:
patent: 4514259 (1985-04-01), Koski
patent: 4687548 (1987-08-01), Ilmoniemi et al.
patent: 4804441 (1989-02-01), Lyytinen

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