Air Conveying Corp. Cylindrical Separators were originally invented as a Corrugator Bypass Collector and are used throughout the Corrugated Industry. They are used as an inexpensive and temporary way of keeping the Corrugator running if the baler goes down. This also keeps the paper off of the guys repairing the baler compared to a bypass valve in the baler feed chute. Since then we have also used them in many applications where the material being conveyed is free of dust.