Charging device including movable charging brush contactable to

Photocopying – Contact printing – Light boxes

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361221, G03G 1502

Patent

active

056064012

ABSTRACT:
A charging device includes a movable member to be charged having a surface charge injection layer with a volume resistivity of 1.times.10.sup.10 -1.times.10.sup.14 .OMEGA.cm, and a charging member for charging the member to be charged, the charging member including a movable charging brush contactable with the member to be charged and supplied with a voltage. The movable member is driven such that the following relationship is satisfied, N(Vk-Vb)/Vk>4, where Vk (mm/sec) is a movement speed of the surface of the member to be charged, Vb (mm/sec) is a movement speed of an outer peripheral surface of the charging brush, and N (mm) is a contact width between the member to be charged and the charging brush, measured in a movement direction of the member to be charged. The charging member may include a movable conductive particle layer instead of a charging brush.

REFERENCES:
patent: 4555171 (1985-11-01), Clouthier et al.
patent: 4761709 (1988-08-01), Ewing et al.
patent: 5305061 (1994-04-01), Takama et al.
patent: 5351109 (1994-09-01), Haneda
patent: 5357323 (1994-10-01), Haneda et al.
Patent Abstracts of Japan, vol. 9, No. 105 (P-354), May 9, 1985. (Publication No. 59-229571).
European Search Report.

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