DEVELOPING DEVICE FOR IMAGE FORMING DEVICE

PROBLEM TO BE SOLVED: To restrain developer whose toner concentration is lowered from adhering to a developer carrier again after finishing development in an image forming device. SOLUTION: A developer carrying means 9 supplying the developer 5 to the developer carrier and a developer carrying means 8 recovering and restoring the developer 5 whose toner concentration is lowered because it is submitted for development to a toner supply area are differently rotated so that the developer 5 may be carried in the same direction. Space between both means 8 and 9 is screened by a partitioning plate 11. A developer carrying means 10 is provided in the toner supply area and screened from the 1st and the 2nd developer carrying means 8 and 9 except a developer transfer part by a partitioning plate 12. The developer after finishing development is carried while it is allowed to go away from a developing roller 3 by the carrying means 8, so that the developer whose toner concentration is lowered after finishing the development is restrained from adhering to the roller 3 again. The developer 5 is smoothly transferred owing to the screw or the blade and the rotating directions of the respective developer carrying means 8, 9 and 10.