Longitudinal wire papermaking machine

Details Longitudinal wire papermaking machine Longitudinal wire papermaking machine

D - Textiles, Paper

21

F

92/15.3

D21F 1/40 (2006.01) D21F 1/48 (2006.01) D21F 1/50 (2006.01) D21F 9/02 (2006.01)

Patent

CA 1183710

INVENTORS: ALFRED BUBIK, HANS DAHL, HERBERT HOLIK, RUDIGER KURTZ and WERMER SEIDER INVENTION: LONGITUDINAL WIRE PAPERMAKING MACHINE ABSTRACT OF THE DISCLOSURE 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. - 2 -

411785

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