Multiple Ribbon Screw This type of screw consists of two or more ribbon flights of different diameters and hand, mounted one within the other on the same pipe or solid shaft by rigid supporting lugs. Material is moved forward by one flight and backward by the other, thereby inducing positive and thorough mixing. Online Quote • Short Pitch Conveyor • Long Pitch Conveyor • Variable Pitch Conveyor • Tapering Flight or Shaft Pitch Conveyor • Cut Flight Pitch Conveyor • Cut and Folded Flight Pitch Conveyor • Ribbon Screw • Multiple Ribbon • Double Flight • Paddle Conveyor • Sectional Flights • Helicoid Flights Home / About Eagen / Custom Feedscrews / Ordering Info / Contact Us