An imaging system includes a developing chamber, a first conveyance path, a second conveyance path, a first air passage and a second air passage. A developing roller located in the developing chamber carries a developer to a developing region where the developing roller is closest to an image carrier. A first stirring-conveying portion is located in the first conveyance path adjacent the developing roller to supply the developer to the developing roller. A second stirring-conveying portion is located in the second conveyance path adjacent the first conveyance path to circulate the developer between the second conveyance path and the first conveyance path. The first air passage has an inlet coupled to the developing chamber and an outlet coupled to the second conveyance path, and the second air passage has an inlet coupled to the second conveyance path and an outlet coupled to the developing chamber.

A first guide member guides a sheet from a sending roller pair to a discharge port. A second guide member is disposed above the first guide member such that an upstream end of the second guide member in a sheet discharge direction overlaps the first guide member, and forms an upper partition of a discharge path in an area extending from a position above an end of the first guide member to a position of a discharge roller pair. The second guide member guides the sheet to the discharge roller pair. A cooling fan blows air from below the discharge path toward a lower surface of the second guide member. The lower surface of the second guide member is formed convexly curved upward when viewed in a width direction intersecting the sheet discharge direction. The lower surface of the second guide member guides air toward the first guide member.

An image forming apparatus includes an image bearing member, a developing apparatus, a driving device, an airflow space portion, a duct, and, a drawing fan. A driving-force transmission member, the driving device and the airflow space portion are disposed on a side on which a developer container faces the image bearing member. The driving-force transmission member, the driving device, the duct and the drawing fan are disposed on one end side of a developing rotary member in a rotation-axis direction of the developing rotary member. The duct is disposed underneath the developer container, formed from the side on which the developer container faces the image bearing member to a side opposite to the side on which the developer container faces the image bearing member. The drawing fan is disposed on the side opposite to the side on which the developer container faces the image bearing member.

Various embodiments of an adapted cooling system for a printer are disclosed herein. The adapted cooling system includes a panel for installment along a housing of the printer and further includes a manifold that couples a more powerful fan to the printer.

An image forming apparatus includes: a housing; a fixing device that is disposed in the housing and that heats an unfixed image made of developer to fix the unfixed image to a recording medium; an exhaust device having an air inlet through which air heated by the fixing device is sucked, an air outlet through which the air sucked through the air inlet is discharged from the housing, and a flow path portion having a flow path space through which the air flows from the air inlet to the air outlet; and a mesh member that is provided on the air inlet and that collects fine particles contained in the air that is sucked.

An image forming apparatus includes a housing; a fixing device that is disposed in the housing and that heats an unfixed image made of developer to fix the unfixed image to a recording medium; an exhaust device having an air inlet through which air heated by the fixing device is sucked, an air outlet through which the air sucked through the air inlet is discharged from the housing, a flow path portion having a flow path space through which the air flows from the air inlet to the air outlet, and an air flow generator that generates an exhaust air flow in the flow path space; and plural mesh members that are located in a region between and including the air inlet and the air outlet and arranged in a direction in which the air flows, the mesh members collecting fine particles contained in the air that is sucked.

An image forming apparatus includes: a body of the image forming apparatus; a first inclined portion that is inclined upward from one side surface toward another side surface of the body of the image forming apparatus; a second inclined portion that is inclined downward from an inner end portion of the first inclined portion toward the one side surface; multiple cooled parts that are disposed in a space between the first inclined portion and the second inclined portion and that are disposed to be spaced from each other in a direction from the one side surface to the other side surface; a first wall member that is disposed above the first inclined portion and that has a first ventilation part; and a second wall member that is disposed below the second inclined portion and that has a second ventilation part.

An image forming apparatus includes a first exterior cover provided on a front surface of the image forming apparatus so as to be openable and closable, a second exterior cover provided on a side surface of the image forming apparatus, a third exterior cover fixed on a front surface side of the image forming apparatus and above the first exterior cover in a vertical direction, and a fan configured to suck outside air through a gap formed between the first exterior cover and the second exterior cover. In a state where the first exterior cover is closed, the gap formed between the first exterior cover and the second exterior cover is larger than a gap formed between the third exterior cover and the second exterior cover.

A control portion of an image forming apparatus causes an operation of a first fan start and then causes a second fan to start. The time when the operation of the second fan starts is from a predetermined time before the time when the leading end of one sheet reaches a fixing nip to the time when the rear end of the one sheet passes through the fixing nip. In this way, since the second fan operates after the first fan operates, fine particle dust is hardly discharged to the outside of the image forming apparatus, and it is possible to suppress dew condensation inside the image forming apparatus.

An image forming device includes: a conveyance path that conveys a printing medium; an image former that is arranged in a first place in the middle of the conveyance path, forms an image on one surface of the printing medium, and fixes the formed image by heating; a cooler that is arranged in a second place downstream in a conveyance direction from the first place in the middle of the conveyance path, and cools the printing medium by blowing air for cooling to the printing medium; and a reader that is arranged in a third place downstream in the conveyance direction from the second place in the middle of the conveyance path, and reads the image formed on the printing medium, wherein between the first place and the second place of the conveyance path, one or a plurality of guide members is provided, and a guide member is not provided.