DUAL PHOTOCONDUCTOR ELECTROGRAPHIC DEVICE
Original Publication Date: 1979-Dec-31
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
To provide consistent and precise solid area development of a latent electrostatic image carried by a photoconductor 11 of an electrographic unit, developer is circulated through a narrow gap between the photoconductor 11 and a second photoconductor 12. The photoconductors 11 and 12 have complementary electrostatic charge patterns, thereby creating linear fields which enhance the development process. To form the complementary charge patterns, the photo-conductors 11 and 12 are each charged to a more or less uniform electrostatic potential and are then separately and complementarily exposed by, say, comple-mentary driver lasers (not shown).