Patent ID: 8718513

Claim:
An image forming apparatus for forming an image on a recording medium, the image forming apparatus comprising: a casing; and a plurality of process units which are attachable to and detachable from the casing, the plurality of process units including: a first process unit and a second process unit, the first process unit including: a first developing unit including a developing roller extending in a first direction; and a first toner cartridge attachable to and detachable from the first developing unit and accommodating a developer of black color, the second process unit accommodating a developer of color which is different from the developer of black color; wherein the casing includes: a first surface having a first opening; a second surface different from the first surface and having a second opening which is continuous to the first opening; a first cover which includes a first front portion extending in the first direction and a first base portion, and which is configured to rotate about the first base portion, between a first opened position at which the first opening is opened by the first cover and a first closed position at which the first opening is closed by the first cover; and a second cover which includes a second front portion extending in the first direction and a second base portion, and which is configured to rotate about the second base portion, between a second opened position at which the second opening is opened by the second cover and a second closed position at which the second opening is closed by the second cover; wherein the first toner cartridge is attachable to and detachable from the casing through the first opening when the first cover is positioned at the first opened position and the second cover is positioned at the second closed position; wherein the second process unit is attachable to and detachable from the casing through the second opening when the second cover is positioned at the second opened position; wherein the casing is configured to locate the first process unit adjacent to the second cover under a condition that the first process unit and the second process unit are attached to the casing; wherein the casing is configured such that the first toner cartridge is attachable to and detachable from the casing through the first opening in a state that the second process unit is accommodated in the casing; and wherein the first front portion of the first cover makes contact with the second front portion of the second cover when the first cover is positioned at the first closed position and the second cover is positioned at the second closed position.