Image developing device with sealing members for preventing toner leakage

Abstract

A layer thickness regulating blade 64 has a plate spring 64b and a pressing number 64a fixed thereto. The plate spring 64b is formed longer than the pressing member 64a so that both ends of the plate spring 64b are exposed. A front surface resilient foam seal 112 made from sponge is attached to the exposed portions, in contact with sides of the pressing member 64a. Further, a Teflon™ film 113 is attached on the plate spring 64b so as to cover the front surface resilient foam seal 112. A sponge side seal 111 is adhered to the rear surface of the plate spring 64b. A sponge side seal 107 is adhered to the developing case 51 at a position that confronts the blade side seal 111. An end seal 106 is adhered across a step portion E of the developing case 51 and the upper end of the base seal 104, and can compressing deform with the blade side seal 111 and the upper side seal 107.

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