Patent ID: 9341984
Filing Date: 2016-05-17
CPC Classification: G03G

Claim Text:
1. A developing apparatus comprising: an image carrier where an electrostatic latent image is formed; a toner carrier for supplying toner to the electrostatic latent image formed on the image carrier; and a toner supply passage for supplying toner fed from a toner cartridge to a toner carrying region where the toner carrier is arranged, wherein the toner supply passage is provided with a backflow prevention portion for preventing the toner from backflowing toward the toner cartridge, the backflow prevention portion has a structure that the height position descends toward the toner carrying region, the toner supply passage includes a first chamber connected to the toner cartridge and a second chamber connected to the first chamber and the toner carrying region, and the bottom surface of the second chamber is positioned below the bottom surface of the first chamber.