Invention Grant
- Patent Title: Image forming apparatus
- Patent Title (中): 图像形成装置
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Application No.: US12878543Application Date: 2010-09-09
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Publication No.: US08774655B2Publication Date: 2014-07-08
- Inventor: Motohiro Usami , Takahiro Seki , Masashi Nagayama , Shinji Aoki , Jun Hitosugi
- Applicant: Motohiro Usami , Takahiro Seki , Masashi Nagayama , Shinji Aoki , Jun Hitosugi
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Limited
- Current Assignee: Ricoh Company, Limited
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2009-209478 20090910; JP2010-176781 20100805
- Main IPC: G03G15/00
- IPC: G03G15/00

Abstract:
An apparatus includes: an image carrier; a charger to uniformly charge a surface of the image carrier; an exposing unit to perform write scanning on the image carrier; a developing unit that includes a developer carrier carrying a developer including a toner and that is configured to perform a visible image process on an electrostatic latent image formed on the image carrier; and a transferor to transfer a toner image that has been subjected to the process onto a material. If length Lg of a non-image part directly before an image part in an image carrier moving direction has the relation of Lg≧π·Ds/(Vs/Vp), where Vp and Vs are circumferential velocities of the image carrier and the developer carrier and Ds is a diameter of the developer carrier, suppression of toner attachment on the material is controlled in a predetermined length from an image front end in the direction.
Public/Granted literature
- US20110058831A1 IMAGE FORMING APPARATUS Public/Granted day:2011-03-10
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