Shoe for an extended-nip press

Details Shoe for an extended-nip press Shoe for an extended-nip press

1993-12-23

1995-06-13

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162361, D21F 302

Patent

active

054239494

ABSTRACT:
A shoe in an extended-nip press arranged to be placed in a nip between a back-up roll and a belt-mantle roll inside the belt mantle. The shoe is pressed by an actuator, e.g., a cylinder device, towards the back-up roll, while the web/felt or felts is/are placed between the back-up roll and the belt mantle. The shoe has at least one chamber provided for hydraulic fluid into which a fluid is passed from a duct. The shoe has a first curved face, whose curve radius is substantially equal to the curve form of the back-up roll. The shoe has a second face which forms the bottom of the chamber provided for hydraulic fluid. The second face joins the first face and has a larger curve radius than the first face. At a joint between the first face and the second face, the tangents of the faces are substantially the same.

REFERENCES:
patent: 5110417 (1992-05-01), Lehtonen et al.
patent: 5262011 (1993-01-01), Ilmarinen

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