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 a first image forming unit, a second image forming unit, and an intake unit. The intake unit includes an intake duct provided at one side relative to the first and the second image forming units in an arrangement direction of the plurality of image forming units and configured to take in air outside the image forming apparatus from an intake port, a first fan configured to take in air from a first communication port, and a second fan configured to take in air from a second communication port. The intake unit branches air taken in from the intake duct to the air taken in from the first communication port by the first fan and the air taken in from the second communication port by the second fan, and blows the air to each of the first image forming unit and the second image forming unit.

A pressurization device for a toner cartridge includes an inner cover, an airbag and a sliding member. The inner cover is arranged at a toner feeding port of the toner cartridge; the airbag is made of elastic material; the airbag includes a fixed end that is fixed to the inner cover and a free end that extends outward from the fixed end; the fixed end is provided with an airbag opening interconnected to an interior of the toner cartridge; a remaining portion of the airbag is arranged as closed except for the airbag opening; a first end of the sliding member is connected to the free end of the airbag and moves toward the fixed end of the airbag back and forth, so that the airbag ejects gas into the toner cartridge by means of being compressed.

A feeding apparatus includes a feeding unit, an ion generating unit and a controller. The ion generating unit irradiates the sheet fed by the feeding unit with the ion. The controller acquires an information on the fed sheet and to controls the ion generating unit. The controller operates the ion generating unit in a case that the information of the sheet is a first information, and does not operate the ion generating unit in a case that the information of the sheet is a second information.

An image forming apparatus prints an image on a sheet. The image forming apparatus includes a casing, a plurality of open/close devices, a plurality of fans, and a control device. The casing includes a plurality of openings and a plurality of ventilation holes. The plurality of open/close devices are attached to the casing, and configured to open and close the respectively corresponding openings. The plurality of fans each generate an airflow from inside of the casing to a corresponding one of the plurality of ventilation holes. The control device controls operation of the plurality of fans. The control device also detects occurrence of an event that restricts execution of the printing, identifies a type of the event, selects at least one of the plurality of fans according to the type of the event, and drives the selected fan.

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.

At a specified time within a heating period during which a fuser of a dry electrophotographic (DEP) printing device is heated to a set temperature, a temperature of the fuser is measured. Responsive to determining that the measured temperature is less than a threshold temperature, the set temperature to which the fuser is heated during the heating period is increased.

An image forming apparatus includes a housing having an opening, a cover configured to open the opening in an open state and to close the opening in a close state, a photosensitive drum, a heater, a fan configured to force air out of the housing, and a controller. The cover in the open state is configured to allow a sheet with a toner image fixed thereon to be ejected through the opening. The heater is configured to heat a sheet to fix a toner image on the sheet, and is located between the cover in the close state and the photosensitive drum. During execution of a printing process, the controller is configured to cause the fan to rotate at a first speed if the cover is in the closed state, and to rotate at a second speed lower than the first speed if the cover is in the open state.

An image forming apparatus includes an image forming unit configured to form an image on a recording medium, a first frame and a second frame configured to support the image forming unit, the first frame and the second frame being provided to sandwich the image forming unit, an outer casing member extending along a surface of the first frame configured to cover the first frame, and an electronic circuit substrate that is provided on a side opposite to the image forming unit via the surface of the first frame, and is provided between the first frame and the outer casing member, wherein the electronic circuit substrate extends in a direction crossing a surface of the outer casing member.

An image forming apparatus configured to perform simplex printing and duplex printing includes a recording medium ejection device, a suction duct, a blower, and a pair of rotating members. The recording medium ejection device includes a recording medium outlet through which a recording medium is ejected outside of the image forming apparatus and a recording medium reverse port through which a part of the recording medium is ejected to reverse the recording medium in the duplex printing. The suction duct includes a suction port to suck air. The blower is disposed in the suction duct and sucks air from the recording medium ejection device to the suction port. The pair of rotating members is disposed between the suction port and at least one of the recording medium outlet and the recording medium reverse port and reverses both sides of the recording medium in the duplex printing.