Paper making and fiber liberation – Apparatus – Running or indefinite length product forming and/or treating...
Patent
1989-11-15
1991-01-29
Hastings, Karen M.
Paper making and fiber liberation
Apparatus
Running or indefinite length product forming and/or treating...
162300, 162352, D21F 136
Patent
active
049884085
ABSTRACT:
The present invention relates to an apparatus for guiding the wires of a paper machine former. The former includes a double wire section including two wires (1,2) in parallel direction (R) in which on the other side of the wires (1,2) a dewatering unit (10) is arranged to drain water from the stock (3) flowing between the wires and in which at least the farthest wire (2) from the dewatering unit is compressed with foil lists (20) or equivalent support members against the wire (1) nearest to the dewatering unit (10) in cross-machine direction with respect to wire direction (R) and across the web width. The load of these foil lists (20) is achieved by separate pressurized load hose construction (21) arranged between each foil list (20) and support table or equivalent in order to achieve the desired press to the stock (3) between the wires (1,2). Each load hose construction (21) is, according to the invention, equipped with separate pressure spaces into which a desired overpressure can individually be conducted to achieve a desired foil list load against the wire leaning against the said foil list across the web width.
REFERENCES:
patent: 3027940 (1962-04-01), Dunlap
patent: 3595105 (1971-06-01), Stuebe
patent: 4769111 (1988-09-01), Nevalainen et al.
Hastings Karen M.
Valmet-Ahlstrom Inc.
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