An image forming system includes a shelf portion, a post, and an image forming apparatus. An article is placeable on the shelf portion. The post is configured to support the shelf portion. The image forming apparatus is configured to form an image and includes a support portion on an upper surface of the image forming apparatus. The support portion is configured to support the post.

According to one embodiment, in an image forming apparatus, a frame that supports a transfer belt conveying a toner image in a conveyance direction and image forming units aligned along the transfer belt is provided with a dowel hole between the image forming units in a direction parallel to the conveyance direction and is also provided with an elongated hole having a long axis in a direction parallel to the conveyance direction, a dowel between the exposure units of a chassis supporting exposure units in a direction parallel to the conveyance direction is fitted to the dowel hole, and another dowel is inserted into the elongated hole.

A cover stopper engages a cover engaging portion when a cover is located at a closed position and to restrict rotational movement of the cover toward an open position. A rotation guide contacts, from above, a rib engagement surface during rotational movement of the cover and to guide rotational movement of the cover between the open position and a relay position. An urging member urges the cover from the relay position toward the closed position. When the cover rotationally moves from the open position to the relay position, a rib and the rotation guide engage each other to restrict upward movement of the cover against urging force of the urging member. When the cover reaches the relay position from the open position, the rib and the rotation guide become disengaged and the cover moves to the closed position where the cover engaging portion and the cover stopper engage each other.

A photosensitive drum is rotatable about a drum axis extending in a first direction. A frame includes a first side plate located at first end in the first direction and a second side plate spaced from the first side plate in the first direction. The frame rotatably supports the photosensitive drum between the first side plate and the second side plate in the first direction. The frame holds a developer cartridge. A lock lever is pivotable about a pivot axis extending in a second direction intersecting with the first direction. The lock lever is movable between a lock position at which the developer cartridge is locked on the frame and a release position at which the developer cartridge is unlocked from the frame.

A process cartridge includes a first unit including an image bearing member configured to carry an electrostatic latent image, and a second unit including a developer bearing member configured to develop the electrostatic latent image carried on the image bearing member into a toner image, the second unit being capable of being mounted on the first unit in a mounting direction. The first unit includes a moving member that moves the second unit mounted on the first unit at a mounting position to a detachment position. The second unit includes a storage unit that stores information about the second unit. The moving member is disposed on a first side of the process cartridge in a longitudinal direction of the image bearing member. An electrode of the storage unit is disposed on a second side of the process cartridge in the longitudinal direction.

A process cartridge includes a first unit including an image bearing member configured to carry an electrostatic latent image, and a second unit including a developer bearing member configured to develop the electrostatic latent image carried on the image bearing member into a toner image, the second unit being capable of being mounted on the first unit in a mounting direction. The first unit includes a moving member that moves the second unit mounted on the first unit at a mounting position to a detachment position. The second unit includes a storage unit that stores information about the second unit. The moving member is disposed on a first side of the process cartridge in a longitudinal direction of the image bearing member. An electrode of the storage unit is disposed on a second side of the process cartridge in the longitudinal direction.

An image forming apparatus includes an apparatus body, a first cartridge detachably attached to the apparatus body, a second cartridge detachably attached to the apparatus body in a state where the first cartridge has been attached to the apparatus body, a guide unit configured to guide the first cartridge, and a drawer member configured to be inserted to and drawn out of the apparatus body in a direction intersecting the axial direction. The drawer member is inserted to the apparatus body in a state supporting the second cartridge. The first cartridge includes an engagement portion and the second cartridge includes an engaged portion, and the second cartridge is supported by the first cartridge via engagement of the engagement portion and the engaged portion.

An image forming apparatus includes a frame having a first metal plate and a second metal plate where the first metal plate has a recess portion. The frame supports an image forming member that forms an image on a sheet. The first metal plate and the second metal plate are positioned to each other and an adhesive is in a space formed between the recess portion and the second metal plate. The space is such that it receives the adhesive by injection.

A cabinet structure includes multiple cover members configured to spatially partition an inside from an outside of a cabinet, and a clearance communicating between the inside and the outside of the cabinet is left between two cover members, the two cover members being adjacent to each other, of the cover members, and a passage defined by the clearance and leading from the inside to the outside of the cabinet through the clearance has a shape with multiple bends.

A photosensitive drum is rotatable about a drum axis extending in a first direction. A frame includes a first side plate located at first end in the first direction and a second side plate spaced from the first side plate in the first direction. The frame rotatably supports the photosensitive drum between the first side plate and the second side plate in the first direction. The frame holds a developer cartridge. A lock lever is pivotable about a pivot axis extending in a second direction intersecting with the first direction. The lock lever is movable between a lock position at which the developer cartridge is locked on the frame and a release position at which the developer cartridge is unlocked from the frame.