Abstract: An image forming apparatus including a main duct forming an airflow path of air blown by an air blower such that the air flows through the main duct from a first side to a second side in an extending direction of the airflow path, the main duct including a plurality of air outlets opening in a direction intersecting the extending direction and discretely disposed along the extending direction, and an image forming unit including a plurality of air inlets disposed apart from the plurality of air outlets such that the air flowing out from the plurality of air outlets is introduced into the plurality of air inlets, each air inlet formed such that a second-side end thereof in the extending direction is positionally shifted toward the second side in the extending direction, relative to a second-side end of a corresponding air outlet in the extending direction.

Abstract: An image forming apparatus including a main duct forming an airflow path of air blew by an air blower such that the air flows through the main duct from a first side to a second side in an extending direction of the airflow path, the main duct including a plurality of air outlets opening in a direction intersecting the extending direction and discretely disposed along the extending direction, and an image forming unit including a plurality of air inlets disposed apart from the plurality of air outlets such that the air flowing out from the plurality of air outlets is introduced into the plurality of air inlets, each air inlet formed such that a second-side end thereof in the extending direction is positionally shifted toward the second side in the extending direction, relative to a second-side end of a corresponding air outlet in the extending direction.

Abstract: A process unit includes a photosensitive drum, a frame, a partitioning member, and a charging wire. The photosensitive drum has a rotational axis extending in an axis direction. A space is formed in the frame. The partitioning member is disposed in the space to partition the space into a first air passage into which an air flows from an outside of the frame and a second air passage. The separating member is formed with a ventilation hole thorough which the air flows into the second air passage from the first air passage. The charging wire is disposed in the second air passage and extends in the axis direction to charge the photosensitive drum. The frame is formed with a guiding surface that guides the air flowing into the second air passage toward the charging wire.

Abstract: An image forming apparatus which forms an image on a recording sheet includes a housing having an exhaust outlet and an image forming unit disposed in the housing and configured to form an image on a recording sheet. A duct in the housing may have an inlet at a first end in the housing, and communicate with the exhaust outlet at a second end in the housing. The image forming apparatus includes an exhaust fan disposed between the exhaust outlet and the duct, and being configured to cause air entering the duct from the inlet to go toward the exhaust outlet; a first filter disposed in the duct to cover the inlet and being configured to remove dust suspended in the air, and a second filter disposed in the duct downstream from the first filter in a direction of airflow and being configured to remove dust suspended in the air.

Abstract: An image forming apparatus which forms an image on a recording sheet includes a housing having an exhaust outlet and an image forming unit disposed in the housing and configured to form an image on a recording sheet. A duct in the housing may have an inlet at a first end in the housing, and communicate with the exhaust outlet at a second end in the housing. The image forming apparatus includes an exhaust fan disposed between the exhaust outlet and the duct, and being configured to cause air entering the duct from the inlet to go toward the exhaust outlet; a first filter disposed in the duct to cover the inlet and being configured to remove dust suspended in the air, and a second filter disposed in the duct downstream from the first filter in a direction of airflow and being configured to remove dust suspended in the air.

Abstract: A belt unit is detachably mountable in an image-forming apparatus. The belt unit includes: at least two rollers, each having a roller shaft; an endless belt looped around the two rollers; and an outer frame disposed around the endless belt and having two roller-supporting walls rotatably supporting the rollers therebetween, the roller shafts of the rollers extending in a direction intersecting the roller-supporting walls.

Abstract: A belt unit is detachably mountable in an image-forming apparatus. The belt unit includes: at least two rollers, each having a roller shaft; an endless belt looped around the two rollers; and an outer frame disposed around the endless belt and having two roller-supporting walls rotatably supporting the rollers therebetween, the roller shafts of the rollers extending in a direction intersecting the roller-supporting walls.