HIGH FREQUENCY VIBRATORY ENHANCED CLEANING IN ELECTROSTATIC IMAGING DEVICES
Original Publication Date: 1991-Apr-30
Included in the Prior Art Database: 2004-Apr-05
Xerox Disclosure Journal
Numerous cleaning methods have been proposed to accomplish effective toner release from the imaging surface, including blades supported in doctoring or wiping modes, rotating or sweeping neutral or electrically-biased fiber brushes, magnetic brushes, vacuum systems and various combinations thereof. However, toner components and debris are tightly adhered to the surface by electrostatic and mechanical forces, and tend to resist release. Accordingly, particularly when the shape of a particle is not optimum, e.g. a flat toner particle, prior cleaning methods do not achieve optimum cleaning operation. Additionally, it has been noted that even when pre-clean charging, the charge at the toner and photoreceptor surface interface is not neutralized to the extent desirable for subsequent toner release. This problem is believed to arise from the failure of neutralizing ions from the pre-clean charging device to reach all the charged areas on the toner and photoreceptor. Even when precleaning illumination is provided, to dissipate charge on the surface, by flooding the back side of a translucent photoreceptor, tightly bound charge remains at the particleiimaging surface interface.