Loading box for a former of a paper or board machine

Details Loading box for a former of a paper or board machine Loading box for a former of a paper or board machine

1995-05-03

1997-03-04

Hastings, Karen M.

Paper making and fiber liberation

Processes and products

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

162203, 162300, 162301, 162352, D21F 100, D21F 152, D21F 154

Patent

active

056075545

ABSTRACT:
A loading box adjustable in zones thereof for a former of a paper or board machine. The former comprises a twin-wire section including two wires placed one above the other and running in the same transfer direction. In the twin-wire section, a drain box is mounted at one side of the wires to remove water out of a fibrous pulp running between the wires. At the opposite side of the wires, a loading box is mounted and is provided with loading ribs arranged in the transverse direction in relation to the transfer direction and which extend across the web width. The loading ribs are loaded toward the bottom of the drain box in order to produce a desired compression in the fibrous pulp running between the wires. The loading box is provided with loading members arranged to produce a locally raising or lowering force applied to the loading ribs in the direction transverse to the transfer direction. The force is applied simultaneously to at least two successive loading ribs to profile the compression force applied by the loading ribs to the fibrous pulp in the transverse direction.

REFERENCES:
patent: 4769111 (1988-09-01), Nevalainen et al.
patent: 4988408 (1991-01-01), Evalahti
patent: 5061347 (1991-10-01), Bubik et al.
patent: 5116477 (1992-05-01), Bubik et al.
patent: 5167770 (1992-12-01), Bubik et al.
patent: 5185064 (1993-09-01), Nyman
patent: 5262010 (1993-11-01), Bubik et al.
patent: 5387320 (1995-02-01), Jaakkola

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