Fibrous stock screening apparatus

Details Fibrous stock screening apparatus Fibrous stock screening apparatus

1986-06-30

1988-05-17

Peters, Jr., Joseph F.

Classifying, separating, and assorting solids

Sifting

Combined type

209273, 209306, 209389, B07B 900, B07B 120

Patent

active

047448946

ABSTRACT:
A dam is used to divide the typical single screen of a fibrous stock screening apparatus into two primary screening zones. Stock inlet and rejects outlet ports are routed to each primary screening zone. The screen is extended past the typical rotor to create an initial screening zone. One or more of the blades of the rotor may also be extended to create turbulence and/or oscillating pressures in the initial screening zone. The profile of the blades may be designed to produce a shearing action with a long moderate relief on the trailing edge to create gradual and extended negative pressure.

REFERENCES:
patent: 4213823 (1980-07-01), Wittig et al.
patent: 4234417 (1980-11-01), Gauld et al.
patent: 4374728 (1983-02-01), Gauld
patent: 4396502 (1983-08-01), Justus
patent: 4462901 (1984-07-01), Gauld

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