The left-wound and right-wound spirals are fitted tightly together alternately and jointed with 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 belts 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.