Sheet-forming apparatus for a twin wire paper machine with posit

Details Sheet-forming apparatus for a twin wire paper machine with posit Sheet-forming apparatus for a twin wire paper machine with posit

1992-09-22

1993-09-28

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162300, 162352, D21F 100, D21F 154

Patent

active

052483924

ABSTRACT:
A twin wire sheet-forming apparatus for a paper machine having at least two fixed hydroextractors which have separate places for drainage to the hydroextractor side from places for dispersion of fibers. These hydroextractors are arranged alternately in the two wire loops, and have shoe blades, with a wedge shaped trough in a mid-portion of each shoe blade. The wires do not bend at a front leading portion of each shoe, yet do bend at the mid-portion or back portion of each shoe for generating a pressure pulse to disperse the fibers.

REFERENCES:
patent: 3874998 (1975-04-01), Johnson
patent: 3944464 (1976-03-01), Means
patent: 3992190 (1975-11-01), Cowan
patent: 4134788 (1979-01-01), Witworth
patent: 4447296 (1984-05-01), Cruse
patent: 4523978 (1985-06-01), Pullinen
patent: 4623429 (1986-11-01), Tissari
patent: 4790909 (1988-12-01), Harwood
patent: 4999087 (1991-03-01), Ebihara et al.

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