Electrophotography – Image formation – Photoconductive member
Reexamination Certificate
2007-11-06
2007-11-06
Chen, Sophia S. (Department: 2852)
Electrophotography
Image formation
Photoconductive member
C399S088000, C399S111000
Reexamination Certificate
active
11184887
ABSTRACT:
An image forming apparatus of the present invention attaches a process unit to a body frame, thereby fits a third coupling into a second coupling of a drive transfer device, forms the Oldham structure, absorbs a shift between axial centers of a belt side shaft and a belt drive shaft, and always presses the second coupling toward the third coupling by a coil spring, absorbs a shift in the parallel direction with a belt side shaft32a, thereby surely fits the third coupling into the second coupling, even if the axial center of the belt side shaft is shifted from the axial center of the belt drive shaft due to distortion of the unit, rotates stably the transfer belt, causes no distortion to a transfer image, and obtains high color superimposition precision.
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Chen Sophia S.
Foley & Lardner LLP
Kabushiki Kaisha Toshiba
Toshiba Tec Kabushiki Kaisha
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