	US 7,348,117 B2
	Toner, method for manufacturing the toner, developer including the toner, toner container containing the toner, and image forming method, image forming apparatus and process cartridge using the toner
Ryohta Inoue, Numazu (Japan); Naohiro Watanabe, Suntoh-gun (Japan); Masahide Yamada, Numazu (Japan); Sonoh Matsuoka, Numazu (Japan); Chiaki Tanaka, Tagata-gun (Japan); Takeshi Takada, Yokohama (Japan); Masahiro Ohki, Numazu (Japan); and Akinori Saitoh, Numazu (Japan)
Assigned to Ricoh Company Limited, Tokyo (Japan)
Filed on Aug. 04, 2004, as Appl. No. 10/910,764.
Claims priority of application No. 2003-206431 (JP), filed on Aug. 07, 2003; application No. 2003-206433 (JP), filed on Aug. 07, 2003; and application No. 2003-327835 (JP), filed on Sep. 19, 2003.
Prior Publication US 2005/0031980 A1, Feb. 10, 2005
Int. Cl. G03G 9/08 (2006.01)

U.S. Cl. 430—108.22 [430/108.1; 430/108.4; 430/123.5]

19 Claims

1. A toner, comprising:

toner particles including a binder resin; and

at least two kinds of particulate resins, which are located on at least a surface of the toner particles,

wherein the toner satisfies at least one of the following relationships (1) and (2):

(TgA−TgB)≧20° C. (1)

wherein TgA and TgB represent glass transition temperatures of a particulate resin (A) having a highest glass transition temperature and a particulate resin (B) having a lowest glass transition temperature among the at least two kinds of particulate resins, respectively, and

100,000≤Mwc≤6,000,000 and 8,000≤Mwd≤800,000 (2)

wherein Mwc and Mwd represent weight average molecular weights of tetrahydrofuran-soluble components of a particulate resin (C) having a highest weight average molecular weight and tetrahydrofuran-soluble components of a particulate resin (D) having a lowest weight average molecular weight among the at least two kinds of particulate resins, respectively, wherein Mwc>Mwd.