PNEUMATIC PAPER SENSING SWITCH
Original Publication Date: 1998-Dec-31
Included in the Prior Art Database: 2004-Apr-08
Xerox Disclosure Journal
Disclosed is the use of a pneumatic switch for sensing paper in an electrophotographic printing machine. The pneumatic switch mounts on one side of a paper path. A source of air on the opposite side provides an air stream to the switch that crosses the paper path. In the absence of paper, the switch maintains an initial ON condition. As paper travels through the paper path, it intersects the air stream and causes a pressure change at the switch. Once a sufficient amount of air is blocked, the switch toggles to an OFF condition indicative of detection.