Browse Prior Art Database

Original Publication Date: 1976-Dec-31
Included in the Prior Art Database: 2004-Mar-27

Publishing Venue

Xerox Disclosure Journal


A multi~stage toner filter (1) with filter elements 3~6 selected according to particle size distribution, The filter elements would be tapered elements geometrically designed to obtain uniform pressure distribution across each filtering element. The filter elements would be spaced along a path in a container (2) in an inter~ digitally spaced orientation so as to allow air flow to end by~-pass the filtering elements in a convolute path as each element becomes clogged with toner. Assuming a mean particle size of 15 microns, the inlet filter element (3) could be designed to filter coarse particles of greater than 25 microns, the first stage element (4) would filter particles between 15 and 25 microns, The second stage elements (5) would filter 5-~l5micron particles and the outlet stage (6) would filter particles of less than 5 microns, This design is intended to provide improved filter bag life and capacity as compared to a conventional filter bag associated with a conventional xerographic brush cleaning system,