Longitudinal wire papermaking machine

Details Longitudinal wire papermaking machine Longitudinal wire papermaking machine

1982-09-16

1984-07-10

Fisher, Richard V.

Paper making and fiber liberation

Apparatus

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

162300, 162314, 162352, 162364, 162370, 162374, D21F 140, D21F 150

Patent

active

044591756

ABSTRACT:
A longitudinal wire papermaking machine is disclosed wherein the longitudinal wire is guided in a dewatering region, following a pre-dewatering path, out of a wire plane downwardly over a deflection element and then upwardly over a downwardly domed or arched dewatering element towards the wire plane. The deflection element is arranged at a spacing K=approximately 15 to 80 mm from the dewatering element. The longitudinal wire is guided at the inlet section of the dewatering region, located between its outbound or run-off location at the deflection element and its lowest deflection location, over a negative pressure zone, for instance constituted by a suction chamber, which is effective at its underside. Hence, at the inlet section there is obtained a reduction in the suspension pressure and the fiber stock suspension is guided with an approximately constant total thickness lower into the dewatering region, i.e. at a relatively flat angle towards the dewatering element, so that there is avoided any backflow at the surface region of the suspension.

REFERENCES:
patent: 3087538 (1963-04-01), Newman, Jr.
patent: 3844881 (1974-10-01), Moody
patent: 3846233 (1974-11-01), Kankaanpaa
patent: 3994774 (1976-11-01), Halme et al.
patent: 4146424 (1979-03-01), Justus
patent: 4361466 (1982-11-01), Wong et al.

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