We are offering computer control double layer rolls-connecting vest bag making machine, flat rim bag making machine. brief instruction:this machine is special for making both dots-servering rolls-connecting flat-rim bag and dots-servering rolls connecting vest bag.adopt computer control, stepping(servo) lenth setting system to control the error of sealing and cutting.use accurate photoelectric eyes tracking system to locate exactly. The customer can choose computer numerical control to adjust the lenth of bag, the machine will automatic stop running and alarm if the printing bag have problem. this machine is for producing hdpe, ldpe film bag, which are widely used in supermarket, department store.