Four group size vibratory screening apparatus

Details Four group size vibratory screening apparatus Four group size vibratory screening apparatus

1978-02-02

1979-05-22

Halper, Robert

Classifying, separating, and assorting solids

Sifting

Feeding

209317, 209275, B07B 106

Patent

active

041558405

ABSTRACT:
An apparatus for sorting wood chips or other particulate material into groups according to size. The apparatus includes a housing having an opened top, a first screen attached to the housing substantially covering the opened top thereof, a second screen attached to the housing beneath the first screen, and a hopper fixedly attached to the housing for holding a quantity of wood chips and for depositing wood chips onto substantially the center of the first screen. The first and second screens slope downwardly from the centers thereof so that any wood chips of a size too large to pass therethrough will pass, aided by the force of gravity, to the periphery thereof. The openings in the second screen are smaller than the openings in the first screen thereby causing the wood chips deposited on the first screen from the hopper to be sorted into the three groups: Those too large to pass through the first screen; those which passed through the first screen but not the second screen; and those which passed through both the first and second screen. The apparatus may include a third screen for sorting wood chips into four groups.

REFERENCES:
patent: 726172 (1903-04-01), Korab
patent: 1501047 (1924-07-01), Hall
patent: 2384181 (1945-09-01), La Fave
patent: 3108949 (1963-10-01), Fehlmann
patent: 3416660 (1968-12-01), Larsson
patent: 3504793 (1970-04-01), Eaton et al.
patent: 3819050 (1974-06-01), Lower

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