International Business Machines Corporation

Roberta R Tanner

Raymond A Daniels

Ben A Nilsson

Robert L Fey

James E Bierschbach

Jerry C Andrew

Apparatus and method for accurately setting a gap between mating

A xerographic device having a reusable photoconductor which is subjected in repeating cycles to (1) a charge corona whereat the photoconductor is uniformly charged to a negative voltage, (2) an imaging station whereat a working portion of the photoconductor is selectively discharged, to leave a charged area on this working portion defining a negative electrostatic latent image to be reproduced on copy paper, (3) a magnetic brush developing station whereat negatively charged carrier beads transport positively charged toner to the photoconductor's latent image, to leave a toned image on the photoconductor, (4) a transfer station, including a negative transfer corona, whereat a portion of the photoconductor's toned image is transferred to copy paper, (5) a positive preclean corona whereat the negatively charged photoconductor and its positive residual toner are subjected to a positive charge, and (6) a cleaning station whereat the photoconductor is cleaned by a brush having an affinity for positively charged particles. The charge corona spans a greater width of the photoconductor than does the developing station. The charge corona and the transfer corona span a lesser width of the photoconductor than the preclean corona.

Growing community of inventors

Longmont, CO, United States of America

Roberta R Tanner