Ease of exchange of a UFP collecting filter provided opposed to a sheet feeding path between transfer and fixing is improved. Therefore, a duct unit 50 kept in a state of holding the UFP collecting filter is removably and easily mounted to a duct 51.

Collecting efficiency of UFP by a filter 53 is improved. Therefore, a sheet feeding guide 37 provided between a transfer portion and a fixing portion is provided with an air passing portion 37c in order to form an air passage toward the filter 53.

An image forming apparatus includes: a band electrode that electrically charges a surface of a photoreceptor, the band electrode being disposed along an axial direction of the photoreceptor, a suction port that sucks air and ejects a discharge product generated at the band electrode; and a first blowing port that blows air, wherein the air blown from the first blowing port flows along the band electrode from one end of the band electrode toward the other end, and is sucked through the suction port.

A developing device includes a bottom cover part that covers a bottom surface of a developing container and forms an air passage extending in a front and rear direction between the bottom surface and the bottom cover part, an air blowing fan that supplies air into the air passage, and an air receiving port that is provided at a front end part of the air passage and receives the air supplied from the outside of the air passage by the air supply unit. Air discharge ports are provided on wall parts on both right and left sides forming the air passage and discharge the air flowing into the air passage to the outside of the air passage.

In one example, an apparatus for selectively removing primer in a printing system is described, having a chamber for supply of a pressurised fluid, a plurality of valves fluidically coupled to the chamber and individually pivotable about a common elongate member that extends along a length of the apparatus, and a set of actuators to pivot the plurality of valves about the elongate member to selectively supply pressurised fluid from the chamber along the length of the apparatus.

An image forming apparatus includes a fixing device that fixes an image to a recording medium that is transported by applying heat; a guide member including a first guide surface that guides the recording medium to which the image has been fixed by the fixing device, a second guide surface that is opposite to the first guide surface and that guides the recording medium that is transported backward after being guided by the first guide surface, and a communicating portion that enables air to flow between the first guide surface and the second guide surface; and plural suction members that cool the recording medium guided by the first guide surface by sucking air in a direction toward the second guide surface of the guide member, the suction members being arranged in a transporting direction in which the recording medium is transported.

An image forming apparatus includes an image carrier, a cleaning unit, a development device, and a control unit. The development device includes a toner collection mechanism having a developer carrier and a filter. The control unit is capable of executing a scattered toner recovery mode at non-image forming time, in which the filter is vibrated, a potential difference is generated in the direction for the toner to move from the developer carrier to the image carrier, the developer carrier is rotated in a reverse direction to that at image forming time, and the image carrier is rotated in the same direction as that at the image forming time, so that scattered toner, which has dropped from the filter and adhered to the developer carrier, is recovered by the cleaning unit via the image carrier.

An image forming apparatus includes a development device, and a control unit that controls the development device. The development device includes a toner collection mechanism having a duct, a filter, and an exhaust fan. The duct is connected to a conveyance chamber of the development container and allows air in the conveyance chamber to flow through. The filter is disposed at a connecting part between the duct and the conveyance chamber, and collects toner flowing into the duct from the conveyance chamber. The exhaust fan makes the air in the conveyance chamber flow to the outside via the duct. The control unit changes rotational frequency or operation frequency of the exhaust fan based on current detected by a current detection unit at non-image forming time.

An apparatus for self cleaning of a photo eye sensor in a machine includes at least one air nozzle disposed in air discharge communication with a surface to be cleaned of the photo eye sensor. The air nozzle is in air flow communication with air exhaust from an air cylinder of a component of the machine. Related, corresponding, or associated methods for self cleaning a photo eye sensor in a machine are also disclosed.

Provided is an image forming apparatus in which, while image formation is prevented from being performed, scattered toner that has dropped from a filter and adhered to an outer peripheral surface of a developer carrying member is recovered by a cleaning unit through intermediation of an image bearing member. An absolute value of a perpendicular-magnetic-force gradient of a fixed magnet of the developer carrying member is 4.0 mT/? or less at a position where the fixed magnet faces a central portion of the filter in a rotation direction of a developing sleeve.