Invention Grant
- Patent Title: Image forming apparatus including counter-rotating developing rollers and controlling method
- Patent Title (中): 图像形成装置,包括反转显影辊和控制方法
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Application No.: US12700064Application Date: 2010-02-04
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Publication No.: US08406660B2Publication Date: 2013-03-26
- Inventor: Tomonari Hokkyoh , Hiroaki Maeda , Katsuhiro Akinaga , Koutarou Yamada
- Applicant: Tomonari Hokkyoh , Hiroaki Maeda , Katsuhiro Akinaga , Koutarou Yamada
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2009-036867 20090219; JP2009-266730 20091124
- Main IPC: G03G15/08
- IPC: G03G15/08

Abstract:
The disclosed image forming apparatus includes a rotatable image holding body configured to hold an electrostatic latent image on a surface of the image holding body, a developing device including a forward rotation developing roller rotatable in a same rotational direction as that of the rotatable image holding body and a reverse rotation developing roller rotatable in a reverse rotational direction to that of the rotatable image holding body, which supply a two-component developer to the surface of the image holding body to form a toner image corresponding to the electrostatic latent image, and a control unit configured to control rotation of the image holding body, the forward rotation developing roller, and the reverse rotation developing roller to supply the two-component developer. The control unit controls the rotation of the image holding body to start after a predetermined time period from starting the rotation of the forward rotation developing roller and the reverse rotation developing roller.
Public/Granted literature
- US20100209127A1 IMAGE FORMING APPARATUS AND CONTROLLING METHOD Public/Granted day:2010-08-19
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