Rolling screen gapping system

Abstract

The present invention provides a roller screen gapping system for a roller screen including a series of spaced parallel rolls mounted on pillow blocks at each end thereof, the pillow blocks slidable along respective bed plates transversely of the roll axes to adjust the gap between adjacent rolls. The gapping system comprises spring biased bolts to clamp the pillow blocks on the bed plates, unclamping cylinders carried by each pillow block and exerting an unclamping action on the bed plate to unclamp the pillow blocks for lateral sliding, gapping cylinders carried by each pillow block adapted to contact an adjacent pillow block to adjust the gap between adjacent rolls and a common push cylinder mounted on each of the bed plates and adapted to push all the pillow blocks against a fixed pillow block. A hydraulic control circuit including various solenoid valves controls the operation of the different hydraulic cylinders. The invention also provides for the method of operating the gapping system.

Dependencies are inferred from the claim text.