Electrically charging method and electrically charging device used therefor
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United States of America Patent
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-
Aug 19, 1997
Grant Date -
N/A
app pub date -
Sep 28, 1994
filing date -
Sep 30, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of electrically charging a material to be charged by bringing a charging member impressed with a voltage into physical contact with the material to be charged, wherein the charging member is constituted by a flexible and electrically conducting endless sheet and a rotary insulating brush which supports the endless sheet at a position where the endless sheet and the material to be charged are in contact with each other and gives a pushing force to the endless sheet, and the endless sheet is driven actively or passively together with the insulating brush at a speed substantially in synchronism with the material to be charged while applying a charging voltage to the endless sheet. This method makes it possible to uniformly and stably charge the surface of the photosensitive material even when defects such as pinholes or the like exist in the surface of the photosensitive material, without causing the life of the photosensitive material to be shortened.
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