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US 5,205,418 AGranted
Screen for the sifting of materials of differing weight
AssigneeIperfin S.p.A.
InventorAngelo Toschi
Life of this patent
Estimating the term…
Abstract
Screen for the sifting of materials of differing weight, in which at least part of the screening orifices is covered by elastic diaphragms formed by lamellae.
Claims17
A sieve for sifting a flow of materials of differing weights, comprising:
- (a) a screen having orifices extending through the screen and successively arranged along the flow;
- and
- (b) means responsive to the weights of the materials in the flow, for admitting entry of a material having a predetermined weight into at least one of the orifices, and for barring entry of a material having a weight less than said predetermined weight, said means including resilient diaphragms overlying at least part of said one orifice in a covering position, and yieldable under the force of said predetermined weight to an open position in which said material having said predetermined weight passes into and through said one orifice, said resilient diaphragms being self-returnable to the covering position after passage of said material having said predetermined weight.
Dependencies are inferred from the claim text.