- 专利标题: IMAGE FORMING APPARATUS, PROCESS CARTRIDGE AND TONER
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申请号: US12197651申请日: 2008-08-25
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公开(公告)号: US20090052952A1公开(公告)日: 2009-02-26
- 发明人: Hiroaki KATOH , Naoki Nakatake , Hideaki Yasunaga , Kazuoki Fuwa , Yoshihiro Mikuriya , Masayuki Hagi
- 申请人: Hiroaki KATOH , Naoki Nakatake , Hideaki Yasunaga , Kazuoki Fuwa , Yoshihiro Mikuriya , Masayuki Hagi
- 优先权: JP2007-217151 20070823
- 主分类号: G03G15/08
- IPC分类号: G03G15/08
摘要:
An image forming apparatus including an image bearing member including a tube, the image bearing member to bear a latent electrostatic image, a development device including a pulverized toner including a resin, a coloring agent and a releasing agent component, the development device to develop the latent electrostatic image with the toner to form a visualized image on the image bearing member, a transfer device to transfer the visualized image to a recording medium, a fixing device including a fixing member, the fixing device to fix the visualized image on the recording medium and an elastic blade to remove the toner on the surface of the image bearing member, wherein the toner has a void ratio of from 52 to 58% and a toner torque of from 1.0 to 2.5 mNm according to a torque measuring method using a circular conical rotor and the following relationships (1) to (4) are satisfied: 45≦WA≦60 Relationship (1) 2×WA−40≦50×T≦2×WA+5 Relationship (2) 1.2≦t≦2.0 Relationship (3) 40×T−70≦15×t≦40×T−22 Relationship (4) where WA (%) represents a surface exposure amount of the releasing agent component of the toner, T (mNm) represents the toner torque at 58% of the void ratio and t (mm) represents a thickness of the tube.
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