1997 Volume 36 Issue 4 Pages 268-274
Fundamental toner properties and development characteristics in nonmagnetic monocomponent development were studied. An electrophotographic developing unit consisting of a developing roller, a toner supply roller and a regulating blade connected with bias voltage supplies were used. Influence of bias voltages applied to the toner supply roller and the regulating blade on the properties of the toner layer and the development characteristics were examined. The development characteristics were characterized by the separation of the toner layer associated with applying an electric field between a metal plate and the developing roller. Changes in the bias voltage to the toner supply roller and to the regulating blade caused changes in the toner supply mass and the blade pressure on the developing roller, respectively. The bias voltages to the regulating blade influenced charge injection to the toner layer and the charge distribution within the toner layer, resulting in changes in the properties of the toner layer and the development characteristics. The toner charge at the surface of the toner layer was changed more largely than that at the bottom of the toner layer by the bias voltage to the regulating blade. The development characteristics approached a theoretical one as the bias voltage to the regulating blade increased.
