Apparatus for treating waste-paper

Details Apparatus for treating waste-paper Apparatus for treating waste-paper

1980-06-10

1982-03-02

Kratz, Peter F.

Paper making and fiber liberation

Apparatus

Digester

162237, 162246, 162261, 209223A, 241 43, 241152R, D21C 700, D21C 706, D21C 708

Patent

active

043177018

ABSTRACT:
Waste paper is chemically and mechanically treated to pulp it into a stock. The waste paper is tumbled, without mechanical beating and without rotary means likely to become fouled by foreign material mixed with the paper. A chemical pulping liquid is mixed with the paper as it is being tumbled. The resulting tumbled, pulped waste paper is delivered to a reaction tower where it is further chemically pulped. The waste paper is removed from the bottom of the reaction tower. Various embodiments of paper tumbling devices are disclosed including a rotating drum, stepped conveyor belts, stepped rollers, a vibratory conveyor and a tumbling tower with baffle plates along its length. The reaction tower has an adjustable sized outlet opening at its bottom. An appropriate conveyor is insertable through the outlet opening of the reaction tower for extracting pulped paper stock.

REFERENCES:
patent: 1380871 (1921-06-01), Swart et al.
patent: 3420638 (1969-01-01), Cutter et al.
patent: 3994770 (1976-11-01), Lausch

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