H i C a p D e w a T e r i n G s C r e e n l inear mo T ion P rinci P le of o P era T ion Asphalt sand production Brick sand production A Derrick linear motion screen is equipped with two vibrating motors rotating in opposite directions This dual motor confguration causes the screen frame to vibrate in a linear or straight line motion perpendicular to the plane of the motors Normally the motors are positioned at a 50 angle with respect to the screen surface This results in excellent forward conveyance of oversize particles even when the screen frame is in an uphill position Depending upon the application the screen frame can be positioned from 10 to 15 Maximum fuid capacity is achieved in the uphill position causing the formation of a pool at the feed end of the machine The head or pressure from the pool increases fuid throughput The linear motion of the screen frame effciently conveys the oversize particles out of the pool area where they are then dewatered and discharged 10