Importance

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Abstract

An apparatus and method for sizing and separating particles of a material. The apparatus includes a stand, a frame having a pair of ends and an intermediate portion, and suspension assemblies attached to the stand and the frame for movably suspending the frame on the stand. A pair of inclined screens are removably mounted in a pair of screen boxes removably mounted on the frame, with each of the screens sloping downwardly from the intermediate portion of the frame toward a respective one of the ends of the frame. At least one motor is mounted on the frame for vibrating the frame and attached screens, and a feed box is mounted on the stand adjacent to and above upper ends of the screens for supplying a material to be sized. The method of the invention includes the steps of actuating the motor and depositing a material onto the upper ends of the screens via the feed box, so that the vibrating screens can simultaneously size and separate particles of the material. Spacers can be inserted between the stand and certain ones of the suspension assemblies to effect small changes in the slope of the screens, if needed, for generally equalizing the rate of movement of a material on each of the screens. The screen boxes can be replaced to effect gross changes in the slope of the screens, so that the apparatus can be used in different particle sizing applications.

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First Claim