Twin-wire web forming part in a paper machine

Details Twin-wire web forming part in a paper machine Twin-wire web forming part in a paper machine

D - Textiles, Paper

21

F

92/14.1

D21F 9/00 (2006.01)

Patent

CA 1097967

ABSTRACT OF THE DISCLOSURE The invention provides, in a paper making machine, a twin-wire web forming section comprising: a lower wire serving as carrying wire; an upper wire serving as covering wire; a forming roll; a headbox having a lip aperture; an open-surfaced forming board or equivalent foil equipment on a substantially straight run of the carrying wire downstream of the lip aperture constituting an initial single-wire part of the web forming zone which is followed by a twin-wire portion, the web downstream of the twin-wire forming zone being arranged to follow the carrying wire from which it is subsequently detached and transferred by pick-up means, wherein the longitudinal direction of the headbox and the single-wire initial part of the forming zone are substantially parallel, said direction subtending a substantial first angle with the horizontal plane, and the run of the carrying wire downstream of the forming roll is downwardly directed at a substantial second angle, and the length and/or position of the twin-wire run is adjustable by adjusting the position of the breast roll and traction roll of the covering wire mainly in the vertical direction.

320875

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