Abstract: A magnetic separator for mixtures of powdered plastic and metal comprises a housing having an inlet, a base plate and side plates. A plurality of vertically spaced staggered rows of laterally spaced pilot tubes span, extend through and are secured to the side plates to define a circuitous material falling path. An upright tube clearance plate is arranged intermediate the side plates and has a corresponding plurality of vertically spaced rows of laterally spaced apertures, oversized with respect to and loosely receiving the tubes defining clearance apertures. The clearance plate defines on one side an upright plastic feed chamber having an outlet in the base plate. An upright wiper plate is arranged between the clearance plate and one side plate having a corresponding series of apertures snugly receiving the tubes and defining with the adjacent side plate an upright metal feed chamber having an outlet.

Abstract: A magnetic separator for particulates containing prime material and ferrous particles includes a housing having a removable cover having a central throated inlet along its length. A pair of vertically and laterally displaced hollow metallic rolls are journaled upon the end walls and extend the length of the housing, and enclose an elongated semi-cylindrical permanent magnet within each roll, the magnets being of opposite polarity. A pair of elongated, vertically and laterally displaced flow control dampers extend along the length of the housing and are pivotally mounted thereon and define with the inlet and rolls a vertical first feed path for the particulates. A first elongated hopper underlies the first flow path and has an elongated outlet overlying a first conveyor for receiving and delivering prime materials from the housing. Second and third elongated hoppers are arranged upon opposite sides of the first hopper under the rolls respectively.