Original Publication Date: 1990-Dec-31
Included in the Prior Art Database: 2004-Apr-05
Xerox Disclosure Journal
Static charge build-up poses a significant problem in paper handling in electrophotographic printing machines. A number of methods are available to remedy the problem. A new method employs a potential well scorotron. The potential well scorotron consists of a coronode at high potential, and a nearby conductive screen. The scorotron serves to charge a moving copy sheet surface, to match the screen potential. The scorotron is useful for discharging surfaces by application of an AC potential to the coronode, while maintaining the screen at ground potential. The novelty of this scorotron configuration is that the grounded screen will attract a charged copy sheet surface, and then immediately discharge it, effectively eliminating static. This will afford an overall, uniform, zero potential on a sheet surface. Particularly effective locations for potential well scorotron applications include: in recirculating document handlers; and in paper paths just before the output tray.