SOLID ONE-PIECE MEMBRANE VALVE
Original Publication Date: 1983-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
Relief valves are used in vacuum corrugation feeders to balance and control air flow. A relief valve 20 for use in such feeders is shown in the figure and includes a solid one-piece membrane 21 made of thin stretchable rubber. The membrane is stretched over a vent as shown. A pressure difference across the membrane causes it to stretch which opens a path 30 through which air flows. The valve is a simple, reliable and low cost means of controlling air since only one piece of membrane material is needed and the material is not weakened by internal slits or holes.