| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve conveying efficiency of toner by dissolving stay of the toner conveyed in a developing chamber. <P>SOLUTION: The development apparatus 13 includes a first conveying screw 22 for conveying the toner by providing it in substantially parallel to a developing toner 20 in a housing 21, a second conveying screw 23 provided between the developing roller 20 and the first conveying screw 22 and for conveying the toner, and a partition plate 26 erected except for communicating parts 24 and 25 of both the ends of the upstream side and the downstream side of a toner conveying direction between the first conveying screw 22 and the second conveying screw 23. A toner supply opening 27 is formed in the housing 21 corresponding to a middle part of the toner conveying direction by the first conveying screw 22, which is formed of polybutyrene telephthalate (PBT). <P>COPYRIGHT: (C)2006,JPO&NCIPI |
