Abstract
In normal operation during roller rotation in the mono-component development system, a current flows through each system part (i.e. development roller, blade, and supply roller). The possible mechanism of generation of these currents is discussed, focusing on the surface potential at the development roller surface. The surface charge of the development roller, which is determined by both the toner charge and the charge trapped on the development roller surface are released by contacting with the supply roller. It was clear that this release of charge is observed as a current together with the current generated from toner charging and/or the toner transport. It was found that the surface characteristics of the development roller considerably affected the value of the toner charging and the charge retention of the surface as well as the magnitude and the direction of the current. From these results, a possible mechanism for this current generation is proposed.
