| US 7,613,417 B2 | ||
| Image forming apparatus | ||
| Masashi Fujishima, Osaka (Japan); Shoichi Sakata, Osaka (Japan); Kiyotaka Kobayashi, Osaka (Japan); and Yukihiro Mori, Osaka (Japan) | ||
| Assigned to Kyocera Mita Corporation, (Japan) | ||
| Filed on Jun. 19, 2008, as Appl. No. 12/142,194. | ||
| Claims priority of application No. 2007-168831 (JP), filed on Jun. 27, 2007; and application No. 2008-111694 (JP), filed on Apr. 22, 2008. | ||
| Prior Publication US 2009/0003891 A1, Jan. 01, 2009 | ||
| Int. Cl. G03G 15/09 (2006.01) | ||
| U.S. Cl. 399—270 [399/282; 399/285] | 7 Claims |
| 1. An image forming apparatus using a two-component developer containing a toner and a carrier, comprising:
a latent image bearing member for bearing an electrostatic latent image;
a toner bearing member opposed to the latent image bearing member and adapted to bear the toner to be conveyed to a development
region to develop the electrostatic latent image;
a developer bearing member opposed to the toner bearing member and adapted to bear the two-component developer and supply
the toner in the two-component developer to the toner bearing member; and
a regulator for setting the thickness of a toner layer carried on the toner bearing member to 6 μm to 15 μm and setting a
difference between a half width of a first toner charge number distribution as a number distribution of the charge amount
of the toner carried on the toner bearing member and that of a second toner charge number distribution as a number distribution
of the charge amount of the toner in the two-component developer carried on the developer bearing member to 0.8 (10−10 C/m) or smaller.
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