Electrophotography – Image formation – Development
Reexamination Certificate
2008-01-08
2008-01-08
Brase, Sandra L. (Department: 2852)
Electrophotography
Image formation
Development
C399S044000, C399S045000, C399S053000, C399S167000
Reexamination Certificate
active
07317889
ABSTRACT:
An image forming apparatus includes a rotatable image bearing member bearing an electrostatic image; a rotatable developer carrying member carrying a developer to develop the electrostatic image; speed controlling means for switching a rotating speed of the image bearing member between a first speed and a second speed lower than the first speed, and performing an image forming operation at each speed; and developer carrying member speed controlling means for controlling a rotating speed of the developer carrying member so that a rotating speed of the developer carrying member when the image forming operation is performed by rotating the image bearing member at the second speed, which is less than 70% of the first speed so as to be within a range of ±30% of a rotating speed of the developer carrying member when the image forming operation is performed by rotating the image bearing member at the first speed.
REFERENCES:
patent: 5148218 (1992-09-01), Nakane et al.
patent: 5628043 (1997-05-01), Ikeda et al.
patent: 6301452 (2001-10-01), Yoshizawa
patent: 6539183 (2003-03-01), Ishimizu et al.
patent: 62-98373 (1987-05-01), None
patent: 4-324469 (1992-11-01), None
Brase Sandra L.
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
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