Single pass full color printing system using a quad-level xerographic unit and a tri-level xerographic unit with improved exposure of the photoreceptor

摘要

A four color toner single pass color printing system consists generally of a raster output scanner (ROS) optical system and a quad- level xerographic unit which will deposit blue, yellow or black toner and a tri-level xerographic unit which will deposit magenta or cyan toner. The yellow toner is transmissive to the red or infrared light from the raster output scanner (ROS) optical system to allow ease of exposure of the underlying photoreceptor. The resulting color printing system would be able to produce pixels of black and white and all six primary colors.