公开(公告)号：US3620617A

公开(公告)日：1971-11-16

申请号：US3620617D

申请日：1969-11-24

Applicant: IBM

Inventor： KELLY MICHAEL J ,  SHLATZ MYRON F

IPC: G03G15/16 ,  G03G15/00

CPC classification number: G03G15/1635

Abstract: The invention concerns electrophotographic apparatus provided with an optical photoconductive (OPC) conveying means charged with an image pattern of toner and improved transfer means including an insulating transfer member for effecting a more positive transfer of toner from the OPC to a copy sheet. In one form, the additional transfer member is a Mylar* (*Trademark of Du Pont & Co.) flap partially covering the transfer corona station and, in another case, a nylon or Dacron* mesh covering the entire transfer station. A negative potential is established on the transfer corona wires to charge the paper for effecting transfer of toner and, at the same time, to charge the additional transfer member to repel the paper and insure a closer contact with the OPC material.