POSITIVE AIR PRESSURE SEALING DEVICE FOR DEVELOPER HOUSING
Original Publication Date: 1985-Aug-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
A sealing device (1) for the lower lip (2) of the developer housing (3) of a xerographic copying machine. The arrangement provides a thin film positive pressure air field effect, and acts like an air bearing pad. A concave face (4) of the device forms a surface parallel with the photoreceptor surface (5) over a significantly long circumferential length. A series of air ports (6) in a specific hole pattern provide a positive pressure field within the gap between the device (1) and the photoreceptor surface (5). The hole pattern is such as to bias the field towards the lower lip (2) of the developer housing. This is to counter the distortion in pressure distribution brought about by the motion of the photoreceptor.