Electrophotography – Image formation – Charging
Reexamination Certificate
2006-10-17
2006-10-17
Gray, David M. (Department: 2852)
Electrophotography
Image formation
Charging
C399S168000
Reexamination Certificate
active
07123861
ABSTRACT:
A charging device charging a photosensitive medium of an image formation apparatus while being in contact with the photosensitive medium, supports both ends of a charging member having a plate-shaped elastic member by a support member, so that the charging member has a semicircular section. A curved surface of the charging member contacts a surface of the photosensitive medium to maintain a predetermined contact nip and a contact linear pressure. The charging device controls a total resistance by adjusting a material, a thickness, a contact area, and a radius of the charging member, and maintains the contact linear pressure and the contact nip from the photosensitive medium. As a result, the charging device can easily adjust an electric resistance, minimizing variations of the contact linear pressure and the contact nip, material and processing expenses can be cut down, and productivity of the charging device is improved.
REFERENCES:
patent: 5453819 (1995-09-01), Shimura et al.
patent: 5535088 (1996-07-01), Sato et al.
patent: 5557374 (1996-09-01), Chen
patent: 5839029 (1998-11-01), Kataoka et al.
patent: 5870657 (1999-02-01), Nagame et al.
Gleitz Ryan
Gray David M.
Samsung Electronics Co,. Ltd.
Staas & Halsey , LLP
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