Paper machine having a water extraction box extension

Details Paper machine having a water extraction box extension Paper machine having a water extraction box extension

1979-02-23

1980-08-05

Fisher, Richard V.

Paper making and fiber liberation

Apparatus

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

162317, 162364, D21F 136, D21F 152

Patent

active

042160561

ABSTRACT:
The invention relates to a paper machine of the kind having a continuous inner wire cloth and a continuous outer wire cloth which are passed together around a deflecting component, located within the inner wire cloth, for effecting extraction of water through the outer wire cloth, said machine also having a water extraction box located within the inner wire cloth in front of the deflecting component, and a breast (delivery) box, an upper lip of which lies adjacent the inner wire cloth in the vicinity of the water extraction box and defines, with a support surface provided by the water extraction box, a preliminary water extraction zone in which water can be extracted through the inner wire cloth into the water extraction box. The invention is characterized in that said upper lip of the breast box has a substantially rectilinear inner surface, and in that the deflecting component is a stationary part providing an extension of the water extraction box immediately after the preliminary water extraction zone in such a way that the fibrous web forming zone of the machine is extended up to the circumference of the deflecting component. An object of the invention is to provide a machine in which the fibrous web zone is arranged to provide improved fibrous webs and to be simple to manufacture.

REFERENCES:
patent: 2356285 (1944-08-01), Street
patent: 3726758 (1973-04-01), Parker et al.
patent: 3891500 (1975-06-01), Kankaanpaa
patent: 4124441 (1978-11-01), Nykopp

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