Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
Developing device using one component developer
 A developing device using one component developer for developing an electrostatic latent image on a photoconductive drum. The one component developer includes particles of parents of toner, resin beads and silica. The silica adhere to a surface of each resin bead. The resin beads and the silica further adhere to a surface of the parents of toner. A volume average diameter of the resin beads is more than that of the silica and is less than that of the parents of toner. 
Ricoh Company, Ltd.
G G Y G
G03G G03G Y10S G03G
inventional inventional additional inventional
Akira Shinichiro Kanjiroh
Sawada Yagi Kawasaki