Method and apparatus in a paper machine for regulating pressure

Details Method and apparatus in a paper machine for regulating pressure Method and apparatus in a paper machine for regulating pressure

1985-10-24

1987-07-28

Bashore, S. Leon

Paper making and fiber liberation

Processes and products

Conditioning, preparing or repairing of apparatus

162212, 162252, 162275, 162336, D21F 102

Patent

active

046830278

ABSTRACT:
Method and apparatus for regulating pressure in a wedge-shaped space between the wall of the headbox lip beam or the like and the breast roll. An arrangement is provided by which air jets are directed in a direction opposite to the direction in which the forming wire moves on the breast roll to eject air out of the wedge-shaped space to maintain the pressure induced therein at a desired level. The apparatus includes a blow box coupled to a source of pressurized air and the box having a wall in opposed relationship to the forming wire in which nozzle openings or slots are formed through which the air jets are directed. The blow box has a wider side which substantially closes the wedge-shaped space. Water jets are directed into the wedge-shaped space by water supply devices provided on the blow box for cleaning purposes.

REFERENCES:
patent: Re25333 (1963-02-01), Baxter, Jr.
patent: 2255951 (1941-09-01), Tomtlund
patent: 2756651 (1956-07-01), Lee
patent: 3005746 (1961-10-01), Baxter, Jr.

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