The packing machine evacuates the air from the bag of French fries by its vacuum pump automatically, and fills in nitrogen at your option, in order to protect the French fries from being damaged by squeezing, and then seals it, forming a vacuum environment inside the bag, so that to isolate the oxygen, keep the French fries fresh, protecting it against damp, mildew, rust, corrosion, moth and pollution. The shelf life is effectively prolonged and it’s more convenient to store and transport. Printing equipment can be fitted out according to customers’ requirement, printing shelf life, date and factory number on the seal place. It can widely use nylon bag, PP, PC, PVC, HDPE, PS materials to pack potato chips, French fries and so on.