Venting window

A device in a patty molding machine for eliminating vacuum as a plunger is returned to a pump box by venting air to atmosphere outside said patty molding machine comprising:

• a food pump system;
• said food pump system comprising at least two plungers that pump food material under pressure into a valve manifold flow connected to a cyclically operated molding mechanism;
• a slot or groove cut in a window at a rear position of said pumping system;
• said groove or slot is located on an outer wall of said pump system;
• said plungers operating in overlapping alteration to each other;
• wherein said slot or groove vents air to said atmosphere outside said patty molding machine.