Paper making and fiber liberation – Apparatus – Running or indefinite length product forming and/or treating...
Patent
1992-02-03
1993-05-18
Hastings, Karen M.
Paper making and fiber liberation
Apparatus
Running or indefinite length product forming and/or treating...
162352, D21F 100, D21F 154
Patent
active
052118142
ABSTRACT:
A wire loading device in a paper machine, by whose means a mechanical load is applied to the wire of the paper machine across its entire width, is disclosed. By means of this load, a pressure pulse is applied to the fiber layer or web supported by a wire or between wires. By means of the pressure pulse, the dewatering of the web is promoted, the formation of the web is improved, and/or the transverse profiles of different properties of the web are controlled, such as the transverse profiles of dewatering, filler distribution, formation, and/or retention. The loading device includes a plate-shaped spring blade, whose side is arranged as substantially parallel to the run of the wire or wires. The spring blade is adapted to drag against the inner face of a wire loop to produce a pressure pulse. The spring blade is attached, from outside its dragging area, to a frame part of the loading device. A loading force that produces the pressure pulse and curves the spring blade in the machine direction is produced by an intermediate of the frame part and/or loading devices.
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Jaakkola Jyrki
Odell Michael
Hastings Karen M.
Valmet Paper Machinery Inc.
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