Invention Grant
- Patent Title: Image forming apparatus
- Patent Title (中): 图像形成装置
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Application No.: US14656879Application Date: 2015-03-13
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Publication No.: US09201365B2Publication Date: 2015-12-01
- Inventor: Shingo Sakashita , Satoshi Kojima , Daisuke Misawa , Hiroshi Endoh , Tomoki Murayama , Rintaro Takahashi , Chihiro Kikuchi
- Applicant: Shingo Sakashita , Satoshi Kojima , Daisuke Misawa , Hiroshi Endoh , Tomoki Murayama , Rintaro Takahashi , Chihiro Kikuchi
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2014-053942 20140317
- Main IPC: G03G15/20
- IPC: G03G15/20

Abstract:
An image forming apparatus, including: photoconductor; charging unit; exposing unit; developing unit containing toner; transfer unit; and fixing unit, wherein the toner includes external additive and base particles containing binder resin, colorant, and release agent, the toner has melt viscosity at 100° C. of 500 Pa·s to 8,000 Pa·s and the release agent has melt viscosity at 100° C. of 20 mPa·s to 30 mPa·s, the fixing unit includes fixing member that has roller or belt shape and contacts toner image transferred onto recording medium, and the fixing member includes release layer on surface thereof that is to be brought into contact with the toner image transferred onto the recording medium, and wherein the release layer satisfies the following expressions: 45≦θc1≦60, and 10≦θc1−θc2, where θc1 denotes receding contact angle [°] of the release agent to the release layer and θc2 denotes receding contact angle [°] of the release agent to the toner.
Public/Granted literature
- US20150261144A1 IMAGE FORMING APPARATUS Public/Granted day:2015-09-17
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