Web former in a paper machine

Details Web former in a paper machine Web former in a paper machine

1996-08-23

1998-06-02

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162300, 162352, D21F 100

Patent

active

057593531

ABSTRACT:
A former section provided with a twin-wire zone in a paper machine including a carrying wire and a covering wire which form the twin-wire zone therebetween them, and web-forming and draining members arranged in the twin-wire zone. In an initial part of the twin-wire zone, a stationary unit of forming ribs is arranged inside a loop of one of the wires and includes transverse forming ribs extending across the entire width of the wires and placed at a distance from one another to define gaps therebetween. A loading unit is placed opposite to these forming ribs inside the loop of the opposite wire and includes spring blades which are loaded against that wire. The dragging and loading areas of these spring blades are placed substantially in the middle areas of the gaps between the forming ribs in the stationary unit of forming ribs to prevent crushing of the web between the forming ribs in the stationary unit of forming ribs.

REFERENCES:
patent: 2881676 (1959-04-01), Thomas
patent: 3027940 (1962-04-01), Dunlap
patent: 4917766 (1990-04-01), Koivuranta et al.
patent: 5045153 (1991-09-01), Sollinger et al.
patent: 5167770 (1992-12-01), Bubik et al.
patent: 5211814 (1993-05-01), Jaakkola et al.
patent: 5389206 (1995-02-01), Buck et al.
patent: 5552021 (1996-09-01), Ilvespaa et al.

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