JP2587409B

An electrophotographic printing machine of the type having a photoconductive member wherein at least one electrostatic latent image is recorded thereon. A developer roller transports a developer material closely adjacent to the photoconductive member. A controller, coupled to the developer roller, generates a control signal as a function of the measured electrical potential on the photoconductive member. A second developer roller, spaced from the first developer roller, is electrically biased to a fixed potential to deposit developer material on the latent image. A third developer roller, spaced from the second developer roller, also develops the latent image with developer material. The second developer roller is interposed between the first developer roller and the third developer roller. The electrical bias on the third developer roller is controlled by the control signal from the controller.