Twin wire former

Details Twin wire former Twin wire former

1998-02-13

1998-12-29

Hastings, Karen M.

Paper making and fiber liberation

Processes and products

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

162301, D21F 100

Patent

active

058535446

ABSTRACT:
In a twin-wire former for the production of a paper web, two wire belts (11 and 12) together form a twin-wire zone which is divided into three sections (I, II and III). In the first section (I) the two wires (11, 12) travel over a curved forming shoe (16). They form there a wedge-shaped inlet slot (15) with which a headbox (10) is directly associated. In the second section (II), several resiliently supported strips (27) rest against the lower wire (11) and between each of said strips (27) a rigidly mounted strip (28) rests against the upper wire (12). In the third section (III) both wire belts (11, 12) pass over another curved forming shoe (23).

REFERENCES:
patent: 3994774 (1976-11-01), Halme et al.
patent: 4425187 (1984-01-01), Armstrong et al.
patent: 4532008 (1985-07-01), Creagan et al.
patent: 4609435 (1986-09-01), Tissari
patent: 4769111 (1988-09-01), Nevalainen et al.
patent: 4917766 (1990-04-01), Koivuranta et al.
patent: 4925531 (1990-05-01), Koski
patent: 5078835 (1992-01-01), Schiel et al.
patent: 5389206 (1995-02-01), Buck et al.
Tappi Press, "Twin-Wire Seminar", Washington Hilton, Washington, D.C., Apr. 12-14, 1989, pp. iii, 103-114.

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