Patent ID: 7738819
Filing Date: 2010-06-15
Classification: G03G

Abstract:
1. An image forming apparatus, comprising: an image bearing member configured to bear an electrostatic image thereon; and a developing device configured to develop the electrostatic image with a toner to form a toner image on the image bearing member, wherein the developing device includes wherein the developing device circulates the toner contained in the toner cartridge with the toner supplied to the developing unit when the second rotating member presses part of the toner contained in the toner cartridge into the first space formed in the developing unit by the first rotating member while the second rotating member presses the part of the toner contained in the toner cartridge, and the first rotating member presses part of the toner supplied to the developing unit into the second space formed in the toner cartridge by the second rotating member while the first rotating member presses the part of the toner supplied to the developing unit, and wherein the developing device satisfies the following relationship: wherein T H represents an internal temperature of the hopper, and T C represents an internal temperature of the toner cartridge.