公开(公告)号：CA1051505A

公开(公告)日：1979-03-27

申请号：CA185520

申请日：1973-11-09

Applicant: IBM

Inventor： BINGHAM RONALD E ,  CECIL THOMAS F II ,  GALLI GUIDO ,  POQUETTE GEREON E

IPC: G03G15/02 ,  H01T19/00

Abstract: CORONA CHARGING DEVICE A negatively biased corona discharge system includes a conductive electrode having a thin inorganic dielectric outer layer bonded thereto which is employed as a corona discharge electrode. The discharge system is utilized for uniformly placing a negative charge on an insulator substrate such as an electrophotographic imaging surface. The coating on the electrode acts to suppress the widely spaced emission nodes common to all negatively biased metal corona discharge electrodes. The coated electrode may, therefore, be placed in close proximity to the substrate which it is charging and operated at low emission densities without sacrificing charge uniformity thereby reducing the power requirement of the corona discharge system.