Screening machine

Details Screening machine Screening machine

1979-03-12

1981-05-26

Halper, Robert

Classifying, separating, and assorting solids

Sifting

Feeding

209310, 209275, 74 86, B07B 106, B07B 128

Patent

active

042697034

ABSTRACT:
A screening machine in which screens or portions of screens of elastic material and having substantially the shape of conical frustums are arranged one below the other. The circular edges of the screens are supported by holders which are mounted to a rotating shaft by means of bearings. The bearings of alternate holders being mounted on eccentric crank pins to drive such holders, without their rotating, in a substantially circular horizontal oscillatory motion to impart to each screen a rapid vibratory motion in which every section thereof participates. The vibratory motion results from a portion moving into and out of tension in conjunction with the rotation of eccentric crank pins.

REFERENCES:
patent: 456584 (1891-07-01), Morse
patent: 674286 (1901-05-01), Stubbs
patent: 807423 (1905-12-01), Fern
patent: 1108616 (1914-08-01), Pettibone
patent: 1123168 (1914-12-01), Combs
patent: 2370760 (1945-03-01), Fowler
patent: 2974799 (1961-03-01), Gray
patent: 3647068 (1972-03-01), Wehner
patent: 3971715 (1976-07-01), Wehner
patent: 4088510 (1978-05-01), Betteroust

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