Pressing apparatus having a concave pressure shoe with variable

Details Pressing apparatus having a concave pressure shoe with variable Pressing apparatus having a concave pressure shoe with variable

1995-03-15

1996-12-10

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

100 93RP, 100153, 1673583, 167361, D21F 306, D21G 100

Patent

active

055826890

ABSTRACT:
A pressing apparatus for web-shaped material, especially for smoothing a paper web, has a pressure gap between a roller and a concave pressure shoe. The pressure shoe is loaded by at least two loading elements, which are displaced in the circumferential direction of the roller, and whose loading forces can be adjusted individually. In this way, any desired pressure-stress profile can be set over the width of the pressure gap. Additionally, the radius of curvature of the concave pressure shoe is variable as a function of the loading forces.

REFERENCES:
patent: 4917768 (1990-04-01), Ilmannen
patent: 5043046 (1991-08-01), Laapotti
patent: 5167768 (1992-12-01), Cronin et al.
patent: 5441604 (1995-08-01), Sandberg

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