| 摘要 |
A developing apparatus of an electric photographic printer supplies a two-element developing agent to develop an electrostatic latent image formed on a photosensitive medium. The developing apparatus has a housing, a developing agent supplying roller disposed at a lower part of the housing to transfer the developing agent, a developing agent mixing roller disposed at one side of the developing agent supplying roller to mix the developing agent so that two elements of the developing agent can be mixed equally, a developing sleeve rotatably disposed at one upper part of the developing agent mixing roller to transfer the mixed developing agent to a developing area facing the photosensitive medium by rotating in a counterclockwise direction, a fixing magnet disposed inside the developing sleeve to have magnetic poles N1, S1, N2, N3, and S2 arranged from the developing area in the counterclockwise direction with respect to an axial axis of the developing sleeve to allow the developing agent to be transferred to the developing area through the developing sleeve, and a magnetic bar disposed inside of the housing to be opposite to the magnetic pole S1 of the fixing magnet with respect to the developing area to form a magnetic force brush preventing the developing agent from being scattered as the developing agent passes through the developing area. Accordingly, the developing agent scattered in the developing area can be effectively prevented from flowing and leaking out to an outside of the developing apparatus.
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