G - Physics – 03 – G
Patent
G - Physics
03
G
314/38
G03G 15/02 (2006.01) G03G 21/00 (2006.01)
Patent
CA 1155479
BEAD CARRYOUT CONTROL BY CHANGING CORONA LENGTH ABSTRACT OF THE DISCLOSURE 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 reporduced 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 BO979012 charge corona spans a greater width of the photoconduc- tor than does the developing station. The charge corona and the transfer corona span a lesser width of the photoconductor than the preclean corona.
356814
Andrew Jerry C.
Tanner Roberta R.
International Business Machines Corporation
Saunders Raymond H.
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