Vacuum sealing is the process of sealing a container with a vacuum. Vacuum Sealing Machines help remove air from containers before packing by creating a vacuum inside the containers to prevent air from entering and spoiling the food, thus ensuring that products remain fresh for long-term storage. Besides, there are many other kinds of packaging machines like fine-art industrial packaging machine, pulp industrial packaging machine and so on. http://www.pulpmouldmachine.com/industrial-package-machine/fine-art-industrial-packaging-machine/