Front wall and support arrangement at the headbox of a papermaki

Details Front wall and support arrangement at the headbox of a papermaki Front wall and support arrangement at the headbox of a papermaki

1986-11-12

1988-09-13

Lacey, David L.

Paper making and fiber liberation

Apparatus

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

162347, D21F 102

Patent

active

047707453

ABSTRACT:
The front wall and support arrangement is shaped as a stiff support structure extending across the entire machine width above a slice chamber. The support structure is deformed due to its inherent weight and because of the pressures and temperatures prevailing in the slice chamber. To counteract these deformation effects the support structure is supported by a support carrier of about the same length as the support structure. To attain a substantially lower structural height, the support carrier is arranged relative to the support structure such that an intermediate space prevails between the lower wall of the support structure and the support carrier. This intermediate space accommodates force-generating support elements. Each of the force-generating support elements is provided for only a portion of the surface or area to be supported in the intermediate space. In a preferred embodiment the support structure is a box-like girder equipped with an upright positioned I-profile constituting the support carrier and arranged within the interior space of the box-like girder. Advantageously, the support elements are elastic tubes closed at both ends and extending substantially parallel to the longitudinal axis of the front wall, and the individual elastic tubes are each connected to at least one pressure source.

REFERENCES:
patent: 3769154 (1973-10-01), Wolf
patent: 4008123 (1977-02-01), Kirjavainen
Article from German Language publication "Das Papier", 35 Jahrgang, vol. 10, 1981 of H. Kiessling, pages 445 to 452.

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