| 摘要 |
<P>PROBLEM TO BE SOLVED: To supply recycled toner to a photoreceptor drum always in a stabilized manner when again refilling recycled toner to the developing unit. <P>SOLUTION: A circulation transfer path 301 having a front transfer path 302 and a rear transfer path 303 is provided inside the housing 30 of a developing unit together with a front and rear spiral feeders 61, 62 to transfer the developer agent to those transfer paths. The rear spiral feeder 62 has a transfer capacity limiter 67 downstream the toner receiving hole 44 to locally reduce the transfer capacity. The toner receiving hole 44 is composed of a first toner inlet 441 to supply new toner and a second toner inlet 442 to supply recycled toner. This toner receiving hole 44 is positioned upstream the transfer capacity limiter 67 where the toner is raised up by the rotation of the rear spiral feeder 62. <P>COPYRIGHT: (C)2007,JPO&INPIT |
