Patent ID: 8620190
Filing Date: 2013-12-31
Classification: G03G

Abstract:
1. A developing apparatus comprising: a developing roller disposed facing a photosensitive drum on which an electrostatic latent image is formed, and to supply a developer, formed of carrier and toner and attached to an outer circumferential surface of the developing roller, to the photosensitive drum; a mixing transfer unit disposed facing the developing roller, and comprising: a first mixing transfer unit to supply the developer to the developing roller; and a second mixing transfer unit to mix the developer transferred by the first mixing transfer unit and a supply toner and to transfer the mixture to the first mixing transfer unit; and an auxiliary mixing transfer unit disposed on a transfer path from the first mixing transfer unit to the second mixing transfer unit, and to mix the developer transferred by the first mixing transfer unit and the supply toner, wherein the auxiliary mixing transfer unit comprises: a vertical transfer unit to vertically upward transfer the developer transferred by the first mixing transfer unit; and a mixing unit to mix the developer transferred by the first mixing transfer unit and the supply toner injected from an upper side of the mixing unit and to connect the second mixing transfer unit to a through hole formed in a lower portion of the mixing unit.