SELF-CLEANING ELECTROMAGNETIC DEVICES FOR ELECTROSTATIC COPYING MACHINES
Original Publication Date: 1979-Apr-30
Included in the Prior Art Database: 2004-Apr-01
Xerox Disclosure Journal
Prior art developer housing seals and magnetic devices for capturing magnetically attractable material are generally directed to magnetic members which are per-manent magnets. Such a magnetic device is described in U.S. Patent 3,906,899 where magnetically attractable material is captured between two parallel spaced, thin magnetic pole edges which form a U-shaped member to contain captured magnetic material. The prior art further describes spaced apart permanent magnets to attract magnetically attractable particles which have accumulated upon the photoreceptor. These prior art systems are disadvantageous because the magnetically attractable particles are permanently attracted to the magnets making it difficult to clean accumulated magnetic particles therefrom.