Abstract: Disclosed is a vacuum packaging bag. Three edges of the bag are sealed and one edge is equipped with a concave-convex fastener. The bag is equipped with a deflating device. The deflating device consists of a base, a holding washer, a cover, and a sealing washer. The cover and the based are connected through screw threads. The base is placed inside the bag. The screw part of the base penetrates through one side of the bag. The holding washer fastens the film against the base. The sealing washer is placed on a support. The support is placed in the passageway between the base and the outside of the bag. The middle of the cover has a pressure post which is connected to the sealing washer. The middle of the pressure post has an opening to the outside of the bag. A deflating cylinder is used with the deflating device of the bag. The deflating cylinder is a piston cylinder. The front part of the piston rod has two holding boards. Between the holding boards there is a spacer.

Abstract: Disclosed is a vacuum packaging bag. Three edges of the bag are sealed and one edge is equipped with a concave-convex fastener. The bag is equipped with a deflating device. The deflating device consists of a base, a holding washer, a cover, and a sealing washer. The cover and the based are connected through screw threads. The base is placed inside the bag. The screw part of the base penetrates through one side of the bag. The holding washer fastens the film against the base. The sealing washer is placed on a support. The support is placed in the passageway between the base and the outside of the bag. The middle of the cover has a pressure post which is connected to the sealing washer. The middle of the pressure post has an opening to the outside of the bag. A deflating cylinder is used with the deflating device of the bag. The deflating cylinder is a piston cylinder. The front part of the piston rod has two holding boards. Between the holding boards there is a spacer.