Development system using electrically field dependent developer material

摘要

An apparatus in which an image region recorded on a photoconductive surface is developed with a developer material comprising at least carrier granules and toner particles. The developer material has the resistivity thereof varying continuously as a function of the electrical field applied thereto. A transport moves the developer material closely adjacent to the photoconductive surface. An alternating electrical field is generated between the transport and the photoconductive surface. The alternating electrical field has an amplitude sufficient to change the resistivity of the developer material to a more conductive state.