Method of and means for attaining uniformity in paper webs produ

Details Method of and means for attaining uniformity in paper webs produ Method of and means for attaining uniformity in paper webs produ

1979-04-09

1980-11-25

Smith, William F.

Paper making and fiber liberation

Processes and products

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

162209, 162211, 162301, 162312, 162351, 162352, D21F 100

Patent

active

042356679

ABSTRACT:
By imposing pressure pulses on mobile fibers in suspension in paper making stock slurry in the primary drainage area of the forming zone of a roll former substantially uniform distribution of the fibers is effected in forming of the paper web. A device for effecting the pressure pulses is located adjacent to the primary drainage area and may comprise a pressure pulse producing element of selected shape to control the length of the pressure pulse for the particular character of paper making fiber stock slurry involved in the paper web being formed.

REFERENCES:
patent: 2900023 (1959-08-01), Hornbostel
patent: 3489644 (1970-01-01), Rhine
patent: 3565757 (1971-02-01), Jordansson
patent: 3573159 (1971-03-01), Sepall
patent: 3574054 (1971-04-01), Taylor
patent: 3578558 (1971-05-01), McCarrick et al.
patent: 3582467 (1971-06-01), Gustafson et al.
patent: 3746613 (1973-07-01), Vauhkonen
Paper Trade Journal, Jan. 11, 1965, p. 37.

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