ELECTROGRAPHIC DEVELOPMENT APPARATUS AND METHOD FOR USE WITH PARTIALLY-CONDUCTIVE DEVELOPER

摘要

IMPROVED ELECTROGRAPHIC DEVELOPMENT APPARATUS AND METHOD FOR USE WITH PARTIALLY-CONDUCTIVE DEVELOPER Improved electrographic development apparatus and procedure for use with partially-conductive developer employs transport of the developer through a first development zone in a direction generally countercurrent to a moving image member and through a second development zone in a direction generally cocurrent to the moving image member. The extent of image development within each such zone is controlled by the rate of developer transport and/or the magnitude of developer bias, so that overall development of the different portions of large solid image areas (particularly leading and trailing portions of such areas) is equalized.