| 摘要 |
PROBLEM TO BE SOLVED: To break loose aggregates in a developing device on the upstream side of a position where developer is delivered to developer storage units on a developing roller side, without giving excessive stress to the developer.SOLUTION: A developing device 5Y includes a first developer storage unit 53Y that supplies a developer G and a second developer storage unit 54Y that supplies the developer G to a developer roller 51Y side, and two openings 58 and 59 on a return side and a delivery side for the developer G to circulate between the first and second developer storage units 53Y and 54Y. The opening 59 on the delivery side comprises a plurality of through holes 59a. |
