Patent ID: 6463246
Filing Date: 2002-10-08
Classification: G03G

Abstract:
A developer layer forming method comprising the steps of:charging nonmagnetic and single component developer having a volume average particle diameter D (&mgr;m) to an average specific charge q/m (&mgr;C/g); supplying said charged developer to a development roller having ten-point surface roughness Rz (&mgr;m); and forming a layer of a single component developer having a layer thickness dt (&mgr;m) on said development roller by providing a blade in contact with said development roller at a blade line pressure Pb (gf/cm), wherein dt, Pb, q/m and D meets the following relationships: 4&lE;D&lE;12; 5&lE;q/m&lE;12; 1&lE;Rz&lE;12; 20&lE;Pb&lE;80; dt=1.8Ã—{q/mÃ—Rz/(Pbâˆ’1)}Â½Ã—DÂ±0.25 D; and1.5 D&lE;dt&lE;3.5 D.