Apparatus for treatment of old printed papers with short and lon

Details Apparatus for treatment of old printed papers with short and lon Apparatus for treatment of old printed papers with short and lon

1987-09-15

1990-04-10

Hastings, Karen M.

Classifying, separating, and assorting solids

Plural, diverse separating operations

Aqueous suspension and sifting

162 4, 162 55, 162190, 162264, D21C 502

Patent

active

049158210

ABSTRACT:
Apparatus for treating of old printed papers includes a recycling conduit for the thickening waters of a long fiber fraction upstream of the fractionation apparatus to the pulping and pre-purification apparatus, and a reservoir for the recovery of thickening waters of a short fiber fraction and of thickening/washing waters of the long fiber fraction. This reservoir is fed with clean water for starting the installation and is connected with a second reservoir such that overflow from the first reservoir empties into the second reservoir.

REFERENCES:
patent: 3354028 (1967-11-01), Illingworth et al.
patent: 3957572 (1976-05-01), ErikssonHolz
patent: 4167438 (1979-09-01), Holz
patent: 4332638 (1982-01-01), Mauer
patent: 4360402 (1982-11-01), Ortner et al.
patent: 4780179 (1988-10-01), Clement

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