| US 7,531,279 B2 | ||
| Toner manufacturing method, toner and developer | ||
| Naohiro Watanabe, Suntou-Gun (Japan); Shigeru Emoto, Numazu (Japan); Chiaki Tanaka, Izunokuni (Japan); Masahide Yamada, Numazu (Japan); Akinori Saitoh, Numazu (Japan); Masahiro Ohki, Numazu (Japan); and Ryota Inoue, Mishima (Japan) | ||
| Assigned to Ricoh Company Limited, Tokyo (Japan) | ||
| Filed on May 09, 2006, as Appl. No. 11/430,171. | ||
| Claims priority of application No. 2005-136073 (JP), filed on May 09, 2005. | ||
| Prior Publication US 2006/0251979 A1, Nov. 09, 2006 | ||
| Int. Cl. G03G 9/08 (2006.01) | ||
| U.S. Cl. 430—108.6 [430/111.4; 430/137.14] | 16 Claims |
| 1. A toner manufacturing method, comprising:
emulsion-polymerizing monomers comprising an aromatic vinyl monomer, to prepare a particulate resin dispersion;
mixing the particulate resin dispersion and a colorant dispersion comprising a black metallic material, to prepare an aggregation
dispersion comprising aggregated resin particles including the colorant therein;
heating the aggregation dispersion to a temperature of not less than a glass transition temperature of the particulate resin
to unite each of the aggregated particles to prepare a toner dispersion; and
washing the toner dispersion to obtain the toner, wherein the toner has an average circularity of from 0.960 to 0.985.
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