Patent ID: 7925180

Claim:
An image forming apparatus comprising: a main body; image formation units disposed in the main body, each image formation unit including: a developing case extending in a first direction, the developing case being configured to hold developer therein, a developer carrier disposed in the developing case, the developer carrier configured to rotate and hold the developer on a circumferential surface thereof, and a pair of sealing members disposed in the developing case, each sealing member being disposed in a gap between the developing case and an end of the developer carrier in the first direction, each sealing member being configured to prevent developer from leaking outside the developing case; a moving member disposed in the main body and including an opposing surface facing each of the image formation units, the moving member being configured to move in a second direction perpendicular to the first direction; photosensitive members, each of which is disposed facing a corresponding developer carrier and configured to rotate and hold an electrostatic latent image on a circumferential surface thereof, wherein at least one of the image formation units includes a pair of first stoppers disposed in the developing case, each first stopper being disposed upstream of a corresponding one of the sealing members in a rotation direction of the developer carrier, and a pair of second stoppers, each second stopper being disposed upstream of and overlapping a corresponding one of the first stoppers in the rotation direction of the developer carrier.