The left-wound and right-wound spiral are fitted tightly together alternately and jointed with the straight rods.
Advantages Since the surface is flat and smooth, the belts can carry small items and unstable products. The allowable tension is high, so that heavy load can be transported. The belt strength against pressure is high, so that the belt can be used for processing under pressure. The belts can be used for textile products refining and cleaning process. The belts can be used at high temperature.
