Papermaking apparatus and multi-layer paper forming apparatus

Details Papermaking apparatus and multi-layer paper forming apparatus Papermaking apparatus and multi-layer paper forming apparatus

1993-12-01

1995-10-10

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162133, 162301, D21F 136, D21F 1104

Patent

active

054568030

ABSTRACT:
A papermaking apparatus that can form a paper web having a good fiber formation is disclosed. A plurality of vertically adjustable forming rolls are provided on the top surface of an endless felt couch between a lead-in roll and a couch roll, and stationary forming bars are provided on the bottom surface of a wire screen. The endless felt couch and the wire screen, between which paper stock is interposed, are caused to move by undulation to generate pulses, which in turn apply shear force onto the paper web to dewater the paper web while facilitating fiber dispersion on the paper web.

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patent: 3746613 (1973-07-01), Vauhkonen
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patent: 4306934 (1981-12-01), Seppanen
patent: 4714521 (1987-12-01), Fujiwara
patent: 4999087 (1991-03-01), Ebihara et al.
patent: 5167770 (1992-12-01), Bubik et al.

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