Paper making and fiber liberation – Processes and products – Running or indefinite length work forming and/or treating...
Patent
1991-10-07
1993-02-02
Hastings, Karen M.
Paper making and fiber liberation
Processes and products
Running or indefinite length work forming and/or treating...
162336, 162343, D21F 102
Patent
active
051835371
ABSTRACT:
A headbox tube bank apparatus and method of directing flow through same is disclosed for permitting the flow therethrough of stock in a papermaking machine. The apparatus includes a tube bank frame for rigidly supporting the tube bank, the frame defining a plurality of openings. A plurality of tubes cooperate with the frame such that each tube extends through and is supported by an opening. Each tube has an upstream and a downstream portion, the upstream portion defining an internal cross-machine direction section of substantially circular configuration for maximizing the velocity of the stock through the tube. The downstream portion includes a first and a second end with the first end being connected to the upstream portion and the second end defining a downstream orifice having a flow area in a cross-machine direction which is of rectangular configuration for progressively improving the uniformity, stability, cleanliness, and for lowering turbulence of the stock during flow thereof through the downstream portion.
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Hergert Richard E.
Hergert Richard R.
Neill Eugene B.
Pantaleo Scott B.
Roerig Arnold J.
Archer David J.
Beloit Technologies Inc.
Campbell Raymond W.
Hastings Karen M.
Veneman Dirk J.
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