公开(公告)号：US3700328A

公开(公告)日：1972-10-24

申请号：US3700328D

申请日：1971-12-22

Applicant: IBM

Inventor： DAVIDGE RONALD V ,  LOCKLAR HENRY C ,  RALSTON JAMES C ,  RITCHIE ROBERT T

IPC: G03G21/00 ,  G03G21/10 ,  G03G15/00

CPC classification number: G03G21/105 ,  G03G21/0047 ,  G03G2221/0005

Abstract: The present case concerns several systems for cleaning a photoconductor of residual toner at a cleaning station and recirculating the toner to a developer station in a copier machine. One embodiment contemplates a fairly continuous accumulation of residual toner in the cleaning unit and a periodic recirculation of the toner to the developer unit. Another embodiment makes use of a cleaning station for performing cleaning of toner from an imaging portion of a photoconductor drum member and concurrent conveyance of residual toner from the cleaning station back to the developer station by another portion of the photoconductor. In still another version, recirculation is performed by augers. In some cases, recirculation is initiated by counter means operative after a predetermined number of cycles.

公开(公告)号：US3599605A

公开(公告)日：1971-08-17

申请号：US3599605D

申请日：1969-03-20

Applicant: IBM

Inventor： RALSTON JAMES C ,  RITCHIE ROBERT T ,  THOMPSON BERNARD G

IPC: G03G15/06 ,  G03G15/08 ,  G03G13/00

CPC classification number: G03G15/065

Abstract: A self-biasing electrode system for the development of latent electrostatic images provides low background and good solid area image fill by positioning a conductive electrode adjacent to the image surface as the image is being developed by charged making particles. The electrostatic image induces a charge on the electrode whose magnitude is controlled by grounding the electrode through an electrical impedance, for example, either a resistor along or a resistor and capacitor arranged in parallel.