An image forming apparatus comprises: an image forming unit configured to form an image; an image scanning unit configured to scan an image; and a control unit configured to perform control of the image forming unit and the image scanning unit, wherein the control unit controls the image scanning unit to scan an original, controls the image forming unit to form an additional image on the original after the scanning of the original is completed, and controls the image forming unit to form, after the formation of the additional image on the original is completed, an image in which the original is copied based on image information of the original scanned by the image scanning unit.

A sheet conveying device includes a conveying unit configured to convey sheets along a predetermined conveyance path, and a cover member disposed at a position covering the conveying unit and constituting one of exterior surfaces of the sheet conveying device. The cover member includes a first base portion constituting one of the exterior surfaces, a second base portion facing the first base portion across a space, and a plurality of linking portions provided between the first base portion and the second base portion and linking to both the first base portion and the second base portion. The first base portion, the second base portion, and the plurality of linking portions are integrally formed of a resin material into one piece. The second base portion includes a plurality of ribs protruding from a surface of the second base portion opposite to the first base portion.

An interface drive coupler for a replaceable unit of an electrophotographic image forming device according to one example embodiment includes a first component and a second component coaxial with the first component along a rotational axis of the interface drive coupler. A force receiving portion is positioned on the first component and a force transmitting portion is positioned on the second component. One of the first component and the second component includes a male connector and the other of the first component and the second component includes a female connector that matably receives the male connector. Each of the male connector and the female connector includes a helical thread that extends circumferentially around the rotational axis of the interface drive coupler and that is angled in an operative rotational direction of the interface drive coupler in a direction from the force receiving portion toward the force transmitting portion.

An image forming apparatus includes a first image forming unit that develops a first latent image using a first developer so that a first developer image is developed with the first developer, a second image forming unit that develops a second latent image using a second developer, which is lower in saturation or higher in light-permeability in comparison to the first developer, so that a second developer image is developed with the second developer, a transfer part that transfers the first developer image and the second developer image to a medium, and a control part that controls an amount of the second developer used to develop the second developer image according to a type of the medium.

A switching power supply comprises a transformer; a switching element; a power supply control section which outputs a first gate voltage of a first pulse width consecutively for plural times when the switching element is driven in a burst mode in which the switching element is intermittently driven; a drive time control section which, based on the first gate voltage input consecutively for plural times when the switching element is driven, outputs a second gate voltage to the switching element consecutively for plural times and gradually increases a pulse width of the second gate voltage to a first pulse width from a second pulse width narrower than the first pulse width; and a switching section to which a feedback voltage is input which switches an input destination of the first gate voltage output by the power supply control section from the switching element to the drive time control section in the burst mode.

Provided is an image forming apparatus having a simple configuration capable of measuring a toner current included in a developing current and accurately calculating a toner charge amount based on the measurement result. The developing device has a developer carrier that carries a two-component developer including a magnetic carrier and toner. The density detecting device detects the density of the toner image. The current detecting unit detects a DC component of a developing current that flows when a developing voltage is applied to the developer carrier. The control unit, in a state in which the image carrier is rotated at two or more different linear speeds during non-image formation, forms the same reference image on the image carrier by the developing device, and estimates the toner charge amount based on the developing current when the reference image is formed and the density of the reference image.

A fixing apparatus includes a fixing device, a temperature sensor, a storage device, and a control device. The control device selects, before start of power supply to a heater of the fixing device, a temperature characteristic of an initial temperature the same as or approximate to a temperature of a nip region detected by the temperature sensor, out of respective temperature characteristics of a plurality of initial temperatures stored in the storage device, calculates a predicted temperature that may be reached a prescribed time after the start of power supply to the heater, on a basis of the selected temperature characteristic, and increases the power to the heater by a predetermined first value, when a temperature, detected by the temperature sensor the prescribed time after the start of power supply to the heater, is lower than the predicted temperature.

An image forming apparatus includes an image forming part, a canceling processing part, a first switching processing part and a second switching processing part. The canceling processing part is performable an image canceling operation where a toner image formed on an intermediate transferring member is removed from the intermediate transferring member without transferred to a sheet. The first switching processing part is capable of switching a printing mode in the image forming part between a plurality of printing modes having different printing conditions in the image forming part, based on an image data under waiting for printing and a predetermined first switching condition. The second switching processing part is capable of switching the printing mode based on the image data under waiting for printing and a predetermined second switching condition when the image canceling operation is performed.

In a structure body, a lower-layer portion includes four first column portions, a bottom frame portion, and a first partition frame portion, an upper-layer portion includes four second column portions, a top frame portion, and a second partition frame portion. The bottom frame portion is welded to lower end portions of the first column portions. The first partition frame portion is welded to upper end portions of the first column portions. The second column portions are formed to continue to the lower-layer portion and vertically extend on extension lines of the first column portions. The top frame portion is welded to upper end portions of the second column portions. The second partition frame portion is welded to the second column portions at a position between the first partition frame portion and the top frame portion. Each of the first column portions is thicker than each of the second column portions.

A decurling device includes: a first transport unit including a transport roller, the first transport unit that sandwiches a transported sheet and transports the transported sheet further downstream; and a second transport unit including an endless belt that is in contact with the transport roller. The transport roller has an elasticity that, when the belt is pressed against the transport roller, allows the belt to bite into the transport roller by a bite amount corresponding to a pressing force, the second transport unit includes an abutting member disposed inside the belt, the abutting member pressing the belt from an inside of the belt and causing the belt to abut against the transport roller, and a guide member, the abutting member includes an upstream protrusion, an downstream protrusion, the upstream protrusion and the downstream protrusion being provided at positions away from each other at an upstream portion and a downstream portion in a sheet transport direction, each of the upstream protrusion and the downstream protrusion protruding toward an inner surface of the belt, and a recess provided in an intermediate portion between the upstream protrusion and the downstream protrusion in the sheet transport direction, the recess being recessed away from a straight line connecting a top portion of the upstream protrusion and a top portion of the downstream protrusion, the guide member includes a contact surface that is in contact with the inner surface of the belt, the contact surface defining a part of a circulation track of the belt, and the upstream protrusion protrudes beyond a virtual circle that is tangent to the contact surface.