Dual frequency screen for classifying granular material

Details Dual frequency screen for classifying granular material Dual frequency screen for classifying granular material

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Patent

CA 1173405

ABSTRACT OF THE DISCLOSURE A method of classifying granular material comprises passing the material through at least one screen of a vibrating machine, applying movements to the at least one screen in different planes, including a lower frequency, large throw motion in a horizontal plane and at least one higher frequency, small throw motion in a vertical plane. The apparatus for carrying out the method comprises an outer frame and an inner frame, a screen deck mounted in the inner frame; means suspending the inner frame and deck from the outer frame; resilient means mounting the deck on the inner frame; means for vibrating the at least one screen at the high frequency and in a generally vertical plane and means for applying the lower frequency motion to the inner frame and deck in a generally horizontal plane.

388058

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