Independent drive for each caterpillar chain with A.C. motors and vectorial drive (elimination of transmission elements subject to wear - minimal maintenance and highest reliability).
All the caterpillar chains are pulling, and consist of rubber blocks, which are especially shaped to obtain the largest surface in contact with the pipe;
Tiltable upper caterpillar chains;
Automatic or manual stretching of caterpillar chains;
Higher contact length of caterpillar chains with the pipe in order to achieve the maximum haul-off force even with minimum pressure of the caterpillar chain;
Synchronisation with any type of extruder.