LOW PRESSURE AIR VALVE
Original Publication Date: 1989-Dec-31
Included in the Prior Art Database: 2004-Apr-05
Xerox Disclosure Journal
Electrophotographic printing machines use sheet feeders that require low pressure air supplied by a centrifugal fan. Valves are used to activate and deactivate the air flow to selected sheet feeders. Any air leakage must be compensated for by using a more powerful fan. This results in larger power requirements, increased cost and a noisier machine. Air leakage may be significantly reduced by using a valves made from a carrier supporting a flexible seal. The seal is moved to either open or close the intended air path. The flexible seal is forced by the internal air pressure to conform to the valve body forming a virtual self sealing configuration.