Electrostatic color printing systems and methods using modulated ion streams

Abstract From the Canadian patent

Systems and methods for multicolor electrostatic reproduction, printing or constituting on dielectric and nondielectric print receiving media utilizing screens and a light varying charge distribution in accordance with selected color separation patterns. Ions accelerated through the screen apertures across an air gap are used to form electrostatic latent images transferring to selected color separation patterns which are developed in sequence and registry. Masking to correct for dye absorption errors is carried out by applying earlier formed electrostatic latent color separation images to later formed color separation images to reduce the amount of toner applied in previously printed areas …