Wire loading device in a paper machine

Paper making and fiber liberation – Apparatus – Running or indefinite length product forming and/or treating...

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Details

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.

REFERENCES:
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patent: 3027940 (1962-04-01), Dunlap
patent: 3066068 (1962-11-01), Calehuff et al.
patent: 3323981 (1967-06-01), Heys
patent: 3403073 (1968-09-01), Moran
patent: 3438854 (1969-04-01), Means
patent: 4727047 (1988-02-01), Creagan et al.
patent: 4769111 (1988-09-01), Nevalainen et al.
patent: 5116477 (1992-05-01), Bubik et al.

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