| 摘要 |
PURPOSE:To make the quality of reused developer and toner very high to form a high quality image, by carrying selectively only the developer and the toner suitable for reuse when recovered developer and toner are carried to a developing part. CONSTITUTION:A recovered toner D which is carried to the position corresponding to the first projecting part P of a fixed magnetic 5C and includes impurities is stored in this position, and succeeding toners reach this position successively, and they rise high gradually, and they are stopped until the pressure of succeeding toners is increased to exceed the limit of resistance, but at the next instance, they fly over the position corresponding to a recessed part of the magnet 5C and reaches the position corresponding to the second projecting part Q. At this time, a dust such as paper powder, a coagulated toner, a fatigued toner unsuitable for reuse, nonmagnetic impurities, etc. are separated from normal toners and are dropped downward and are accumulated in the bottom part of a vessel of a repeating part 1 and are not transferred to a part Q2''. Only toners which have removed impurities and are suitable for reuse are transferred and attracted selectively onto a sleeve 4 in the part Q2''. |
