| 摘要 |
PROBLEM TO BE SOLVED: To provide a powder conveying device capable of preventing air in a conveying device system including a powder conveying pipe and a second powder storage room from being highly pressurized, and eliminating the possibility of scattering of powder outside. SOLUTION: In the powder conveying device 5 for conveying powder from a first powder storage room (cleaning box 20) to a second powder storage room (disused toner box 13), using spiral blade type conveying means 10, 12, pressure reducing openings are provided on the downstream side along the conveying direction of the spiral blade conveying means 10, 12. |
