Patent ID: 6603943
Filing Date: 2003-08-05
Classification: G03G

Abstract:
A developing apparatus comprising:a case divided into a first space located at a developer supply side for supplying the developer to an image bearing member and a second space for receiving a replenishing toner; and a first and a second agitating member arranged in the first and the second spaces in such a manner that the first and the second agitating members are positioned parallel to each other and are driven to rotate to agitate and convey the developer, wherein the first agitating member arranged in the first space is a screw member having n threads (n>2), and the second agitating member arranged in the second space is a screw member having (nâˆ’x) threads (x&gE;0), and wherein a non-screw portion is formed at a portion between the threads of the second agitating member located at a predetermined interval in a convey direction of the developer conveyed by the second agitating member.