Patent ID: 6292645
Filing Date: 2001-09-18
Classification: G03G

Abstract:
An electrostatographic printing machine for producing a multicolor output image from an input image signal, comprising:a recording medium adapted to have a plurality of latent electrostatographic images recorded thereon, defined by image charge potential areas and background charge potential areas, moving in a process direction such that an image is recorded on said recording medium and then developed thereon;at least one imaging device for generating an electrostatic latent image on said recording medium;a plurality of development stations for developing the electrostatic latent image on said recording medium with developing materials to produce a developed image thereon, at least one development station comprising not less than two development housings, wherein each development housing includes at least one donor roll, wherein said donor roll in the first one of said development housings positioned in the process direction following said imaging device receives a bias potential higher than the said donor roll in the second of said development housings, said bias potential ranging from about 15% to about 25% less than a first background charge potential voltage; andmeans for applying bias potentials to each said donor roll in said development housing.