Movable deckle within headbox outlet

Details Movable deckle within headbox outlet Movable deckle within headbox outlet

1976-10-22

1978-03-28

Fisher, Richard V.

Paper making and fiber liberation

Apparatus

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

162351, 162353, 162366, D21F 102

Patent

active

040813215

ABSTRACT:
Apparatus for forming one or more sheets from a dilute suspension of fibers in a liquid has a Fourdrinier wire the upper reach of which travels above a foraminous support, and a head box which has an outlet discharging the suspension onto the upstream portion of the upper reach. The liquid passes through the wire and support, and the fibers form a mat which is carried and advanced by the upper reach of the wire. The apparatus has several deckles which are impervious to liquid and are mounted in or on the support or at a level immediately above the upper reach of the wire. Each deckle extends lengthwise of the entire outlet of the head box and its width is only a small fraction of the width of the outlet. Feed screws or the like are used for moving the deckles sideways so that they overlie selected elongated zones of the upstream portion of the upper reach of the wire, and each deckle can be releasably fixed in the selected position. The deckles can cause the fibers to form a single mat or several parallel mats, depending on the number of deckles and on their positions with respect to the side walls of the head box.

REFERENCES:
patent: 1342655 (1920-06-01), Van Ornum
patent: 1734929 (1929-11-01), Vedder
patent: 3361620 (1968-01-01), Gedemer
patent: 3428521 (1969-02-01), Roy et al.
patent: 3791919 (1974-02-01), Schuller et al.

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