METHOD AND APPARATUS FOR CONVEYING AND SEPARATING MATERIALS

摘要

A screen is removably supported above the bottom of a reciprocable conveyor on longitudinally extending supports. Means for stretching the screen includes a plurality of air bags connected to the longitudinal edges of the screen. When the air bags are inflated the screen is stretched transversely and also held against portions of the support means. The air bags may be periodically deflated and again inflated while the conveyer is operated to allow the screen to loosen and impact against the support dislodging material lodged in the interstices of the screen to eliminate blinding.