Invention Grant
US07899349B2 Image forming apparatus with controller for setting transfer member bias
有权
图像形成装置,具有用于设定传送构件偏压的控制器
- Patent Title: Image forming apparatus with controller for setting transfer member bias
- Patent Title (中): 图像形成装置,具有用于设定传送构件偏压的控制器
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Application No.: US12186870Application Date: 2008-08-06
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Publication No.: US07899349B2Publication Date: 2011-03-01
- Inventor: Masanori Shida
- Applicant: Masanori Shida
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick, Cella, Harper & Scinto
- Priority: JP2007-207489 20070809
- Main IPC: G03G15/16
- IPC: G03G15/16

Abstract:
In an image forming apparatus, temporary constant voltages are corrected by using three voltage-current data obtained by applying voltages at three levels to a primary transfer roller to detect currents corresponding to the voltages, respectively. A surface potential of a photosensitive drum is detected by a potential sensor by changing an exposure intensity of an exposure device at three levels in a state in which the temporary constant voltage is applied to the primary transfer roller. A constant voltage during image formation is determined by correcting the temporary constant voltage by using three voltage-current data obtained by detecting currents when surfaces different in potential by light exposure pass through a primary transfer portion.
Public/Granted literature
- US20090041487A1 IMAGE FORMING APPARATUS Public/Granted day:2009-02-12
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