Valve bottomer converTex
120 PP bags per minute

BSW Machinery, the Austrian subsidiary of Windmöller & Hölscher, broke its own previous production record of cross bottom valve sacks made of woven PP. The first converTex for production of 120 sacks per minute was delivered to Sadico in Vietnam.

This machine is now in operation for one year and in the meantime several lines have been shipped to customers around the world.


The new converTex SLC 120 was completely redesigned around the proven opening station which already is in operation for many years on over thousand paper sack machines at even higher speeds. Adapted to the specific needs of PP fabric the opening station can easily handle the rate of 120 PP bags per minute.


At those high production rates support for the operator by the machine is getting more and more important. In the first process step “fabric unwinding” the operator is now supported by a double unwinding station ERC - Easy Roll Change which allows very short change-overs. This increases the production efficiency significantly, because no time is lost before restart with a fresh fabric roll.

Sensors can be integrated into the next process step “perforation” to assist the operator in quality improvement. fabriCon detects labels applied upstream in the process for marking of fabric deficiencies. Another sensor detects excess thickness of fabric as seen when a tape breaks during weaving. In each case the identified fabric section is automatically separated in the rejection gate at the end of the machine.