Oblon, Spivak, Mcclelland, Maier, & Neustadt, P.C.
Electrophotographic photoconductor containing disazo and trisazo pigments
 An electrophotographic photoconductor includes an electroconductive support and a single-layered photoconductive layer formed thereon, containing a charge transporting material, a binder resin, and a simultaneously pulverized mixture including at least one disazo pigment of formula (1) and at least one trisazo pigment of formula (2), which is obtained by simultaneously pulverizing those azo pigments: ##STR1## wherein R.sup.1 and R.sup.2 each is hydrogen, a halogen atom, trifluoromethyl group, nitro group or cyano group; R.sup.3 is hydrogen, chlorine, fluorine, iodine, bromine, nitro group or cyano group; and Ar.sup.1, Ar.sup.2 and Ar.sup.3 each is a coupler radical, which may be the same or different. 
Ricoh Company
G G G G G G Y G G G
G03G G03G G03G G03G G03G G03G Y10S G03G G03G G03G
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Kaoru Masaomi Takaaki Masayuki Megumi Yasuo Katsuichi Takashi Eiji
Tadokoro Sasaki Ikegami Koyano Kawahara Suzuki Ohta Rokutanzono Kurimoto