Method of treating paper fibers in a stationary screen

Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With classifying – separating or screening of pulp

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162242, 209273, 209306, D21D 522

Patent

active

039473147

ABSTRACT:
A paper fiber treatment system utilizes a screw revolving in a perforated cylinder as a tailings screen in place of conventional vibratory or other screens to separate undefibered fibrous materials or other undesirable solids from the free fibers. The tailings screen may be used, for example, in an otherwise conventional fiber treatment system to screen paper stock, downstream from a pulper for pulping waste paper or refuse containing a high percentage of paper fibers, or downstream of a digester for separating knots or other undefibered wood particles from the cooked fibers ejected from the digester.

REFERENCES:
patent: 483030 (1892-09-01), Volstorf
patent: 2809111 (1957-10-01), Durant et al.
patent: 2900077 (1959-08-01), Sandison
patent: 3135193 (1964-06-01), Hunt
patent: 3188942 (1965-06-01), Wandel
patent: 3477571 (1969-11-01), Maag
patent: 3616932 (1971-11-01), Bancroft
patent: 3736223 (1973-05-01), Marsh
patent: 3849302 (1974-11-01), Seifert

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