| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a developing device capable of smoothly delivering developer between developer conveying members, and to provide an image forming apparatus using the same and a process cartridge. <P>SOLUTION: The developing device includes: a developing roller 33; a supply conveyance path 36 and a collection conveyance path 37 having a supply screw 38 and a collecting screw 39 conveying the developer in an axial direction of the developing roller 33; a partition plate 35 partitioning the supply conveyance path 36 and the collection conveyance path 37; and a delivery part 40 adjoining the end on a downstream side in a developer conveying direction of each of the supply conveyance path 36 and the collection conveyance path 37 and delivering the developer to the other conveyance path, wherein the developing device circularly conveys the developer in the supply conveyance path 36 and the collection conveyance path 37. The collection screw 39 includes a paddle 41 whose conveying force for conveying the developer in a direction orthogonal to the axial direction becomes larger as advancing in the developer conveying direction. <P>COPYRIGHT: (C)2011,JPO&INPIT |
