| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable a structure that generation of toner clumps are prevented and transportation characteristics in a developer transfer part 41e are satisfactory. <P>SOLUTION: A development apparatus 4 transports developer to a developing chamber 41a of the upper part from a stirring chamber 41b of the bottom at a transfer part 41e. A first transportation screw 42 placed in the developing chamber 41a and a second transportation screw 43 placed in the stirring chamber 41b have magnetic parts 200a and 200b at positions facing the transfer part 41e. The magnetic parts 200a and 200b have sections to be unlike poles each other across the transfer part 41e. Besides, magnetic flux density of the down stream magnetic part 200a located at down stream in a developer transportation direction is configured to be higher than magnetic flux density of the upper stream magnetic part 200a located in upstream in the transfer part 41e. <P>COPYRIGHT: (C)2012,JPO&INPIT |
