CLEANER HOUSING VENT TO REDUCE EMISSIONS
Original Publication Date: 1996-Feb-29
Included in the Prior Art Database: 2004-Apr-07
Xerox Disclosure Journal
It is dXicult to completely seal airborne toner emissions from a Blademrush cleaner assembly not having a vacuum detoning system, or from one having an extremely low rotational brush speed. A positive pressure is created within the housing by the rotating brush when brush fibers undergo compression against a photoreceptor. Boundary layer toner removal, at the cleaning blade, adds to the pressure making sealing of the housing hard to overcome. Slight gaps or inadequate seal pressure allow airborne toner to escape. Thus, a vent of appropriate size and location, and having a contamination filter included therewith is proposed so as to relieve the pressure and therefore reduce toner emissions. The flow impedance must be kept low compared to potential leakage paths causing a trade-off between locating the vent near the pressure source and far enough away to allow some of the toner to settle out of the air stream to reduce the filter contamination rate.