In the normal sewing method (triple sewing), the seam connection of the bags is sewn by special threads that are damaged and broken over time during operation and jet pulse operation from a sewing point that has less resistance. Kavosh Zist Shayan Sanat Company, in addition to the triple sewing method, is equipped with sewing-heat welding technology for sewing bags. In this method, the sewing place is welded together in a process so that this part of the bag is resistant and strong against jet pulse system. More and ultimately leads to an increase in the life and efficiency of the bags.