Development device and image forming apparatus incorporating same

摘要

A developing device to develop with two-component developer an electrostatic latent image includes a developer bearer to carry thereon developer supplied to the latent image bearer, a first conveyance channel disposed adjacent to the developer bearer, a second conveyance channel disposed adjacent to the first conveyance channel and farther from the developer bearer than the first conveyance channel, a first conveying member disposed in the first conveyance channel to agitate and transport developer supplied to the developer bearer, a second conveying member including a spiral blade winding around a shaft to transport developer in the second conveyance channel in a predetermined developer conveyance direction, and a collected-developer guide to guide a part of developer that leaves the developer bearer to the second conveyance channel beyond the first conveyance channel.

主权项

1. A developing device to develop with two-component developer an electrostatic latent image formed on a latent image bearer, the developing device comprising:
a developer bearer to carry thereon developer supplied to the latent image bearer; a first conveyance channel disposed adjacent to the developer bearer, the first conveyance channel from which developer is supplied to the developer bearer; a second conveyance channel disposed adjacent to the first conveyance channel and farther from the developer bearer than the first conveyance channel, the second conveyance channel through which developer transported from the first conveyance channel is agitated and circulated to the first conveyance channel; a first conveying member disposed in the first conveyance channel to agitate and transport developer by rotation; a second conveying member disposed in the second conveyance channel to agitate and transport developer by rotation in a predetermined developer conveyance direction, the second conveying member including a spiral blade winding around a shaft; and a collected-developer guide to guide a part of developer that leaves the developer bearer to the second conveyance channel beyond the first conveyance channel, the collected-developer guide extending partially along a length of a partition dividing the first conveyance channel and the second conveyance channel.