Toner conveying device for an image forming apparatus and toner replenishing device including the same

摘要

A toner conveying device conveys powdery toner with a screw pump including an elastic stator formed with spiral grooves in its inside periphery and a rotor rotatable inside the stator for conveying the toner in the axial direction. The toner includes a polymerized toner having mean circularity of 0.95 to 0.99.