Goffrierte vacuum bags are used in vacuum machines. 

• The vacuum bag is jammed to the sweat rail and by the stamps which are appropriated honeycombed in the sub side of the film the air is vacuumed from the bag. 
• It is a great advantage that one can process bags on little vacuum chamber machines which do not fit in the vacuum chamber due to the chamber size any more. 
• The vacuum bag then inserted of the outside with the bag opening into the chamber. 
• The goods to be vacuumed are outside of the chamber and get vacuumed by the air sucked off.