Abstract: A screen assembly according to the invention screens material by size and includes first and second sets of transversely spaced apart, longitudinally extending first and second members respectively. The members are parallel to each other, and some members of the second set are located between some members of the first set. At least one of the sets is mounted to vibrate along a longitudinal axis to feed material therealong. A plurality of longitudinally spaced apart, transversely extending third members are located between adjacent first and second members so as to define a plurality of screen openings between the first, second and third members. Third members are mountable so as to be out-of-phase with vibrations of at least one of the first or second sets of longitudinally extending members. The screen assembly can be installed in a vibrating conveyor, such that the first members vibrate with a pan of the conveyor, so as to feed material along the first members.

Abstract: A magnetic trap in the pan floor of a vibratory conveyor comprises a recess in the pan floor for momentarily receiving articles falling therein. A magnet is provided beneath the recess to retain magnetic articles in the recess.