Method and apparatus for preparing and cleaning fibrous material

Details Method and apparatus for preparing and cleaning fibrous material Method and apparatus for preparing and cleaning fibrous material

1978-01-10

1979-09-11

Fisher, Richard V.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Waste paper or textile waste

162 55, 209 17, 209211, 209273, D21D 502, D21D 520, D21D 522

Patent

active

041674383

ABSTRACT:
A method and a system for cleaning and classifying fibrous suspensions whereby the suspension, by screening, is divided into a first stream of accepted stock and a second stream of rejected stock. The latter is then screened once more and thereby divided into a third stream of accepted stock and a fourth stream of rejected stock. The third stream is added to the first stream, whereas only the fourth stream is subjected to a fibre flake break-up process followed by a further screening process resulting in a stock finally rejected and an accepted stock added to the fibrous suspension upstream of the means for carrying out the first screening.

REFERENCES:
patent: 3873410 (1975-03-01), Chupka
patent: 3964996 (1976-06-01), Holz et al.
patent: 4107033 (1978-08-01), Holz
patent: 4111373 (1978-09-01), Holz
Hutzler, "A New Screen for Wastepaper Systems" TAPPI, vol. 58, No. 11, Nov. 1975, pp. 68-70.

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