Patent ID: 8346136

Claim:
A developer carrying device, comprising: a reservoir; a development chamber; a first carrying body arranged in the development chamber and having a first electrode group configured to form a traveling electric field while being applied a voltage sequentially and to circulate charged developer through a facing portion with respect to a developer supply target; a second carrying body arranged in the reservoir and configured to circulate the developer through a facing part with respect to the first electrode group so that the developer being carried is supplied to the first carrying body, wherein the second carrying body includes a second electrode group configured to form a traveling electric field while being applied a voltage sequentially; a third electrode group buried in an inner wall of the development chamber with a predetermined spacing from the first electrode group; and a fourth electrode group buried in the reservoir with a predetermined spacing from the second electrode group, wherein a space between the first carrying body and the second carrying body defines a boundary between the development chamber and the reservoir.