A toner supply device for preventing adverse influence caused by a charging failure of toner without scattering toner and generating ozone due to corona discharge and realizing low potential development according to an ETH phenomenon. The toner supply device is provided with the specific electrostatic...http://www.google.com.au/patents/US7123864?utm_source=gb-gplus-sharePatent US7123864 - Developing device using electrostatic transport member
