Electrophotography – Image formation – Development
Patent
1999-08-09
2000-12-19
Beatty, Robert
Electrophotography
Image formation
Development
G03G 1508
Patent
active
061636746
ABSTRACT:
A developing unit of the present invention includes a case which accommodates toner containing pigment, a developing roller, and a supply roller formed of an elastic material arranged to be pressed against a surface of the developing roller in such a manner as to supply toner to the surface of the developing roller. A sealing member is disposed on the side ends of the developing roller and supply roller so as to prevent leakage to the outside portion of the case. A blade at least longer than the developing roller restrains the quantity of toner on the developing roller. The blade has a radius of curvature between 30 .mu.m and 150 .mu.m.
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Aruga Tomoe
Ichikawa Kazuhiro
Ishiwatari Tahei
Kin Hidenori
Nakashima Yoshihiro
Beatty Robert
Seiko Epson Corporation
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