发明授权
EP2028567B1 Image forming apparatus, process cartridge and toner 有权
成像设备,处理盒和调色剂

Image forming apparatus, process cartridge and toner
摘要:
An image forming apparatus including an image bearing member (2K) including a tube, the image bearing member (2K) to bear a latent electrostatic image, a development device (5K) including a pulverized toner including a resin, a coloring agent and a releasing agent component, the development device (5K) to develop the latent electrostatic image with the toner to form a visualized image on the image bearing member (2K), a transfer device (20) to transfer the visualized image to a recording medium (P), a fixing device (34) including a fixing member (34a), the fixing device (34) to fix the visualized image on the recording medium and an elastic blade (308K) to remove the toner on the surface of the image bearing member (2K), 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 2 × WA - 40 ‰¤ 50 × T ‰¤ 2 × WA + 5 1.2 ‰¤ t ‰¤ 2.0 40 × T - 70 ‰¤ 15 × t ‰¤ 40 × T - 22 where WA, expressed in %, represents a surface exposure amount of the releasing agent component of the toner, T, expressed in mNm, represents the toner torque at 58 % of the void ratio and t, expressed in mm, represents a thickness of the tube.
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