A sheet conveying device can selectively execute a first conveyance process of conveying sheets on a first tray and discharging the sheets onto a second tray, a second conveyance process of conveying the sheets on the first tray and discharging the sheets onto a third tray, or a third conveyance process of conveying the sheets on the third tray and discharging the sheets onto the second tray. A control device records conveyance history information indicating by which conveyance processes each of the sheets on the first tray has been conveyed in a storage device. Furthermore, the control device causes the sheet conveying device to sequentially select the first conveyance process or the third conveyance process for each of the sheets based on the conveyance history information and execute the selected process.

An imaging system includes a transfer roller having a surface to transfer a toner image onto a print medium during a printing operation of the imaging system, a conductive device to contact the surface of the transfer roller, a power source electrically connected to the conductive device, a resistance measurement device, and a controller. The transfer roller rotates according to a printing speed of the printing operation. The power source supplies a bias to the transfer roller through the conductive device during the printing operation. The resistance measurement device measures an electrical resistance of the print medium. The controller reduces the printing speed based on the electrical resistance measured by the resistance measurement device.

The image forming apparatus includes a drum cartridge having a photosensitive drum and a drum drive input member; a developing cartridge configured to be movably mounted to the drum cartridge, the developing cartridge comprising a developing roller disposed so as to face the photosensitive drum and a developing drive input member; a drum drive transmission member configured to engage with the drum drive input member and configured to transmit drum driving force to the drum drive input member while permitting a positional gap of the drum drive input member within a predetermined range; and a developing drive transmission member configured to engage with the developing drive input member and configured to transmit developing driving force to the developing drive input member while permitting a positional gap of the developing drive input member within a predetermined range.

The invention relates to molding of a roller in which a roller body is provided integrally on the outer periphery of an axial core member, and the objective of the invention is to prevent the generation of a thin burr, and damage to the die. In order to achieve this objective, a die is provided with a first split die and a second split die which can butt against one another or separate from one another at mutually-opposing parting surfaces. A roller body molding surface, a cavity being defined between the axial core member and the roller body molding surface when the mold is clamped; and recessed portions which are located at both end portions of the supporting portions and extend along the parting surfaces, and which are not in contact with the outer peripheral surface of the axial core member when the mold is clamped.

To provide a rotating shaft with which flexibility of forming a bend is increased, and the strength is increased while reducing the amount of material.

A V-shaped rotating shaft formed by bending sheet metal. An angle formed on an inner side of a bent portion is less than 90°.

An image reading device includes a reading device body and a document feeder that is turnably attached on the upper side of the reading device body with hinge devices. An extended portion that extends outward from a rear frame is formed on a beam frame fixing the rear frame and a front frame of the document feeder at a predetermined interval, and a third coupling portion coupled to the turning member of the hinge device is formed in the extended portion.

An image forming apparatus includes an image forming unit configured to form an image on a sheet; a fixing unit configured to fix the image on the sheet; a reader configured to read a pattern image on the sheet downstream of the fixing unit in a conveying direction in which the sheet is conveyed; and a controller configured to control the image forming unit to form the image and the pattern image on a same sheet, control the fixing unit to fix the image and the pattern image on the same sheet, control the reader to read the pattern image on the same sheet, and control a density of an image to be formed on a sheet subsequent to the same sheet based on a result of reading the pattern image by the reader and reference data.

An image forming apparatus to and from which a replenishment container accommodating toner is detachable and which forms an image on a recording material includes an apparatus body, and a cartridge including an image bearing member, a developer container to accommodate toner, and a developing portion to develop an electrostatic latent image formed on the image bearing member into a toner image by using the toner. A replenishment port allows replenishment of toner from the replenishment container, which is arranged outside of the image forming apparatus, to the developer container therethrough in a state where the replenishment container is attached to the replenishment port, and a controller notifies a user of information related to a toner amount if it is determined that a lifetime of the cartridge will expire before a sum of toner accommodated in the developer container and toner accommodated in the replenishment container is consumed.

An image forming apparatus includes an electrophotographic photoreceptor which includes an electroconductive substrate, an undercoat layer which is provided on the electroconductive substrate, contains a binder resin and a metal oxide particle, and has an electrostatic capacitance per unit area of from 10 pF/cm.sup.2 to 100 pF/cm.sup.2, and a photosensitive layer provided on the undercoat layer; an electrostatic latent image forming unit that forms an electrostatic latent image on a charged surface of the electrophotographic photoreceptor; and a developing unit that stores a developer containing a toner which contains toner particles of which a volume average particle diameter is from 3.0 μm to 5.5 μm, and develops the electrostatic latent image formed on the surface of the electrophotographic photoreceptor by using the developer, so as to form a toner image.

A toner container includes a container body, an opening, a cover, a toner discharge port, a shutter, a cylindrical structure, protrusions, and an identifier. The shutter is attached to the cover and includes a main shutter covering the toner discharge port. The main shutter moves between a closed position to close the toner discharge port and an open position to open the toner discharge port. The protrusions are on both sides of the cover and protrude in a direction orthogonal to a toner container mounting direction. The identifier is on the cover to indicate a toner color. The cylindrical structure's leading end is downstream of leading ends of the protrusions in the mounting direction. The main shutter's leading end is downstream of the protrusions' leading ends in the mounting direction when the main shutter is in the closed position. The protrusions are downstream of the identifier in the mounting direction.