Electrophotography – Image formation – Transfer
Reexamination Certificate
2008-04-22
2009-06-23
Royer, William J (Department: 2852)
Electrophotography
Image formation
Transfer
C399S302000, C399S351000
Reexamination Certificate
active
07551880
ABSTRACT:
A support member for supporting a cleaning blade of an upstream side is arranged between a charging roller of an image forming unit of the upstream side and a developing sleeve of an image forming unit of a downstream side. The support member is formed using a conductive member (metallic plate), is arranged to completely go across a tangent between the charging roller and the developing sleeve, and is grounded. Even when a developing bias is applied to the developing sleeve during application of a charging bias to the charging roller, the support member can function as a shielding member to prevent noise in the charging bias, which makes it possible to reduce a distance between the image forming units.
REFERENCES:
patent: 4496644 (1985-01-01), Ateya et al.
patent: 7430391 (2008-09-01), Hanashi
patent: 55-32060 (1980-03-01), None
patent: 59-165082 (1984-09-01), None
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Royer William J
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