Method and apparatus for pulping and grading waste material

Details Method and apparatus for pulping and grading waste material Method and apparatus for pulping and grading waste material

1978-06-26

1980-09-16

Smith, William F.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Waste paper or textile waste

162 55, 209211, 241 4617, D21B 132

Patent

active

042228174

ABSTRACT:
Method and apparatus for pulping and grading waste paper in which stock is introduced through a central inlet in one end wall of a cylindrical chamber and accepts are discharged through a perforate screen in the opposite end wall. An impeller in the chamber adjacent the perforate screen provides for pulping and pumping of the stock as well as provides rotational movement of the stock within the chamber. Light rejects are continuously removed through an outlet adjacent the wall containing the perforate screen while heavy rejects are removed through an outlet adjacent the inlet wall.

REFERENCES:
patent: 2218449 (1940-10-01), Cowles
patent: 2220676 (1940-11-01), Cowles
patent: 3844488 (1974-10-01), Neitzel
patent: 3859206 (1975-01-01), Baggaley
patent: 3942728 (1976-03-01), Christ et al.
patent: 3945576 (1976-03-01), Kahmann
patent: 3989197 (1976-11-01), Neitzel
patent: 4017033 (1977-11-01), Tra

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