Invention Grant
- Patent Title: Image forming apparatus
- Patent Title (中): 图像形成装置
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Application No.: US12555368Application Date: 2009-09-08
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Publication No.: US08167410B2Publication Date: 2012-05-01
- Inventor: Masanori Horike , Fuyuhiko Matsumoto , Masanori Saitoh , Nobuaki Kondoh , Shin Kayahara , Osamu Endou , Tomoko Takahashi
- Applicant: Masanori Horike , Fuyuhiko Matsumoto , Masanori Saitoh , Nobuaki Kondoh , Shin Kayahara , Osamu Endou , Tomoko Takahashi
- 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: JP2008-232873 20080911
- Main IPC: B41J2/06
- IPC: B41J2/06

Abstract:
The present invention provides an image forming apparatus, which is able to prevent the adherence of toner on the surface of toner controlling means and around a toner passage hole, and to stably carry out toner passage ON/OFF control when forming an image using the direct recording method. This image forming apparatus includes: a toner carrier; recording medium means; toner controlling means, disposed between the toner carrier and recording medium means, and having a plurality of toner passage holes; and cloud electrode means disposed between the toner carrier and toner controlling means, a toner cloud being formed by applying an AC bias between the toner carrier and cloud electrode means. A control electrode and a common electrode are disposed in toner controlling means, and when the toner of the toner carrier is able to pass through the toner controlling means toward recording medium means, a loop-shaped line of electric force is formed between the recording medium means side and the toner controlling means common electrode, the loop-shaped line by-passing the control electrode.
Public/Granted literature
- US20100061751A1 IMAGE FORMING APPARATUS Public/Granted day:2010-03-11
Information query
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