Papermaking machine with central dewatering cylinder

Details Papermaking machine with central dewatering cylinder Papermaking machine with central dewatering cylinder

1983-09-13

1984-12-25

Smith, William

Paper making and fiber liberation

Apparatus

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

162290, 162300, 162303, 162317, 162318, D21F 160, D21F 1108

Patent

active

044902123

ABSTRACT:
The papermaking machine contains an endless inner dewatering band which extends or wraps with its inner side or surface around two series or successively arranged sections of dewatering surfaces. In each wrap-around section thus defined the inner dewatering band is convergently guided or brought together with a portion of a respective endless outer dewatering band towards an infeed throat or gap and a dewatering section following the same. From each dewatering section the associated outer dewatering band is returned towards its related infeed throat or gap. Two headboxes each of which is directed towards a related one of the infeed throats or gaps are provided, so that there are formed two fiber layers or plies which are to be joined. To achieve a compact and simple construction the series or successively arranged sections of the dewatering surfaces are formed at a common dewatering element which is centrally arranged relative to the infeed throats or gaps. The dewatering element may comprise a solid or a water pervious dewatering surface.

REFERENCES:
patent: 3531371 (1970-09-01), Jordansson et al.
patent: 3543834 (1970-12-01), Stuebe
patent: 3923595 (1975-12-01), Tokuno

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