| US 7,531,281 B2 | ||
| Toner for developing latent electrostatic image, container having the same, developer using the same, process for developing using the same, image-forming process using the same, image-forming apparatus using the same, and image-forming process cartridge using the same | ||
| Masami Tomita, Shizuoka (Japan); Tadao Takikawa, Aichi (Japan); Tomoyuki Ichikawa, Shizuoka (Japan); Fumihiro Sasaki, Shizuoka (Japan); Toshiki Nanya, Shizuoka (Japan); Hiroto Higuchi, Shizuoka (Japan); Shigeru Emoto, Shizuoka (Japan); Shinichiro Yagi, Shizuoka (Japan); Naohito Shimota, Shizuoka (Japan); and Maiko Kondo, Shizuoka (Japan) | ||
| Assigned to Ricoh Company, Ltd., Tokyo (Japan) | ||
| Filed on Oct. 31, 2007, as Appl. No. 11/980,488. | ||
| Application 11/980488 is a division of application No. 11/298583, filed on Dec. 12, 2005, granted, now 7,384,720. | ||
| Application 11/298583 is a continuation of application No. 10/607014, filed on Jun. 27, 2003, granted, now 7,157,201. | ||
| Claims priority of application No. 2002-190465 (JP), filed on Jun. 28, 2002; and application No. 2002-269845 (JP), filed on Sep. 17, 2002. | ||
| Prior Publication US 2008/0138735 A1, Jun. 12, 2008 | ||
| Int. Cl. G03G 9/087 (2006.01) | ||
| U.S. Cl. 430—110.4 [430/137.21] | 9 Claims |
| 1. A double-component developer comprising:
a base of toner particle; and
a magnetic resin carrier,
wherein the base of toner particle comprises a modified polyester resin (i) as a toner binder resin,
wherein a plurality of the base of toner particle has a volume average particle diameter (Dv) of 3 μm to 7 μm, a ratio (Dv/Dn)
of the volume average particle diameter (Dv) to a number average particle diameter (Dn) is 1.01 to 1.25, a plurality of the
base of toner particle comprises 15% by number or less of the base of toner particle having a particle diameter of 0.6 μm
to 2.0 μm, and a plurality of the base of toner particle has a circularity of 0.94 to 0.99 on average.
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