Headbox for paper machine with hollow expanding member for profi

Details Headbox for paper machine with hollow expanding member for profi Headbox for paper machine with hollow expanding member for profi

1988-03-21

1989-10-31

Hastings, Karen

Paper making and fiber liberation

Apparatus

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

162259, 162344, 162347, D21F 102

Patent

active

048774863

ABSTRACT:
A nozzle-like, machine-wide stock channel forms a stock discharge opening to which is allocated a device for adjusting the basis weight cross direction (CD) profile of the paper web produced in the paper machine. The device has a profile bar extending across the machine width. This is connected to an expanding member supported at the headbox in which are arranged pressure chambers disposed in succession across the machine width. By pressurization of the chambers of the expanding member consisting of an elastic material, this can be deformed. The deformation is transferred to the profile bar and in this way the effective width of the stock discharge opening changed.

REFERENCES:
patent: 2928464 (1960-03-01), Western et al.
patent: 3233575 (1966-02-01), Williams, Jr.
patent: 3976539 (1976-08-01), Kirjavainen
patent: 4008123 (1977-02-01), Kirjavainen
patent: 4326916 (1982-04-01), Flaig et al.
patent: 4342619 (1982-08-01), Gladh
patent: 4358342 (1982-11-01), Nuttall

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