Continuous controlled drainage

Details Continuous controlled drainage Continuous controlled drainage

1991-02-26

1992-02-18

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162209, 162352, 162354, 162364, D21F 152, D21F 154

Patent

active

050890905

ABSTRACT:
A process and apparatus for improving stock formation on an open surface paper making machine is described. By the use of both a path for the forming fabric which introduces a controlled level of agitation into the stock, and a low level of vacuum in a suction box extending continuously for at least the major proportion of the forming section, improvements both in paper quality, such as improved wire mark, and in machine operation, such as an improved first pass retention, are obtained.

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