Caterpillars has flexible gripping power self-governing of the opening and can be used as way in Caterpillar and Exit Caterpillar. In particular designed rubber pulling belts-Twin and multi track organization. Motivated by single AC motor joined with reduction gearbox. Opening range 10 mm to 250 mm and 30 mm to 350 between the belts is adjusted manually AC variable speed drive in control panel. Synchronism schem through extruder motor.
Optional : Belt up down movement and grip pressure by hydraulic cylinder for slipless pulling is also available.