Abstract: The image forming apparatus includes a crimping/release mechanism that switches between a crimping position where a transfer nip is formed and a release position where the intermediate transfer belt and the photosensitive drum are separated from each other, by moving at least one primary transfer section of a plurality of primary transfer sections provided facing a plurality of photosensitive drums respectively, and a processor that performs color misregistration adjustment when a combination of image forming units used for image formation is changed.

Abstract: An image forming apparatus includes a housing frame and a waste toner unit. The housing frame includes a support frame which supports the waste toner unit. The waste toner unit includes a waste toner bottle and a retention sheet metal which retains the waste toner bottle. The support frame includes a through-hole. The retention sheet metal includes a convex portion inserted into the through-hole, and a wedge member which protrudes from the convex portion. The wedge member latches the convex portion to an edge portion of the through-hole in the support frame.

Abstract: An image forming apparatus including: an image forming unit configured to form an image on a recording medium: an upper surface cover which is provided to an upper surface of the image forming apparatus and forms at least a part of an appearance of the image forming apparatus; a first cover which is provided to a front surface of the image forming apparatus and forms at least a part of the appearance of the image forming apparatus; and a second cover which is provided to the front surface of the image forming apparatus so as to be located above the first cover and forms at least a part of the appearance of the image forming apparatus. The first cover includes a resin material. The second cover includes a ferromagnetic material.

Abstract: A printing apparatus has a photo imaging plate to be held at a first voltage having a first polarity, and an intermediate transfer member to receive an intermediate image from the photo imaging plate. The intermediate transfer member is to be held at a second voltage having a second polarity opposite to the first polarity. An electrically conductive member is disposed between the photo imaging plate and the intermediate transfer member.

Abstract: A fixing device according to the present disclosure includes a rotatable endless belt and an end portion holder. The end portion holder supports each of end portions of the fixing belt rotatably, and has a cylindrical part along which an inner circumferential surface of the fixing belt slides and an end wall part which faces an end surface of the fixing belt. The end wall part has a restraint part which faces an outer circumferential surface of the fixing belt with a predetermined interval and restrains the fixing belt from turning up.

Abstract: An image-forming apparatus includes: a main body; a toner cartridge having a first opening; a process cartridge having a photosensitive drum and a second opening; a positioning part; a transfer unit; and an urging member. The toner cartridge and process cartridge are attachable to and detachable from the main body in an axial direction of the photosensitive drum. The positioning part and transfer unit are positioned above the process cartridge attached to the main body. The positioning part fixes the attached process cartridge in position relative to the main body. The urging member urges the attached process cartridge toward the positioning part and urges the process cartridge such that the toner can be supplied from the toner cartridge to the process cartridge through the first opening and the second opening when the toner cartridge and the process cartridge are attached to the main body.

Abstract: According to a multifunction peripheral according to the present disclosure, when a DC mixing detection circuit detects that electric source power contains DC power, a DC detection signal Sdc is output from the DC mixing detection circuit. This DC detection signal Sdc is input to a solenoid of a shutoff mechanism. In response, the solenoid turns off a mechanical switch via a movable member. In addition, the DC detection signal Sdc is input to a CPU. In response, the CPU displays an error message on a display and outputs a warning sound from a speaker.

Abstract: A developing roller is located nearer a first end than a second end in a first direction. A first boss extends in a second direction and is movable together with a housing. The first boss bears the weight of a developer cartridge when the first boss is supported by a support surface of a first side plate of a drum unit, and is located away from the developing roller in the first direction and the third direction. A first pressure receiving surface is located farther away from the developing roller than the first boss in the third direction. The pressure receiving member receives a pressing force in the third direction from a pressing member of the first side plate of the drum unit. The first boss is located away from the developing roller in the first direction by a first distance. The first pressure receiving surface is located away from the developing roller in the first direction by the first distance or by a second distance smaller than the first distance.

Abstract: An image forming apparatus includes an image forming unit configured to form an image on a recoding medium, side plates extending on one end and another end of the image forming unit in a vertical direction thereof and configured to support the image forming unit, a main board including an element on a first board and fixed to the side plate on the one end such that the first board vertically extends on an outer side of the side plate, a sub-board including an element on a second board and electrically connected to the main board, a top surface member arranged above the image forming unit and including a sheet discharge tray, and a holding member configured to support the sub-board below the top surface member such that the second board extends in a direction intersecting with a plane on which the first board of the main board extends.

Abstract: A housing structure includes a lower housing, an upper housing, and a cover. The upper housing is mounted on the lower housing and includes a recessed hand grip on a side surface of the upper housing. The cover covers at least a part of the recessed hand grip of the upper housing. The cover is attached and secured to the lower housing from a direction perpendicular to the side surface of the upper housing. The cover includes at least a part of a temporary securing structure between the upper housing and the cover. The temporary securing structure temporarily secures the cover to the upper housing when the cover is attached from the direction perpendicular to the side surface of the upper housing.

Abstract: A processing system includes: a first unit and a second unit coupled to the first unit by a positioning mechanism. The positioning mechanism includes a positioner including a first insertion portion that is included in one of the first unit and the second unit and a first inserted portion that is included in the other of the first unit and the second unit and to which the first insertion portion is inserted to position the first unit and the second unit; and a positioning guide including a second insertion portion that is included in one of the first unit and the second unit and a second inserted portion that is included in the other of the first unit and the second unit and to which the second insertion portion is inserted to guide the first insertion portion to an insertable position into the first inserted portion.

Abstract: An image-forming device includes a main casing, a belt accommodated in the main casing, developing units arranged along the belt, a drawer configured to detachably support the developing units, the drawer configured to move to a position inside the main casing and to a position outside the main casing, and the drawer having a leading end and a trailing end in a pulling direction from the inside position to the outside position; and a guide configured to guide the drawer and to move between a first position and a second position when the drawer is at the inside position, the second position being farther from the belt than the first position from the belt. When the guide is at the second position, the guide is configured to be tilted downward relative to a horizontal direction such that the leading end is lower than the trailing end.

Abstract: A joined structural body includes a first member having a plate shape and including a first surface, a plurality of first joining portions, and a positioning portion, and a second member joined to the first member, having a plate shape, and including a second surface, a plurality of second joining portions, and a positioned portion engaged with the positioning portion. Distances of the plurality of first joining portions from the positioning portion in a plane perpendicularly intersecting with the thickness direction are different among the plurality of first joining portions. Each of the plurality of first joining portions includes a first rib. Each of the plurality of second joining portions includes a second rib. The first rib and the second rib are joined to each other at an intersecting point where the first rib and the second rib intersect with each other when viewed in the thickness direction.

Abstract: A developing cartridge includes a housing, a developing roller, a shaft, a first cam, and an elastic member. The housing has a first outer surface at one end portion of the housing in a first direction. The developing roller is rotatable about a first axis extending in the first direction. The shaft is along a second axis extending in the first direction. The shaft is movable in the first direction relative to both the housing and the developing roller. The first cam is at one end portion of the shaft in the first direction. The first cam is movable in the first direction together with the shaft. The elastic member is positioned outward of the shaft in a radial direction of the shaft. The elastic member is positioned between the first outer surface and the first cam in the first direction.

Abstract: An image forming apparatus includes a photosensitive drum and an exposure unit for exposing a surface of the photosensitive drum to form an image by a first exposure amount. In a rotational axis direction of a charging portion, a width of a transfer portion is shorter than that of a developing portion, a width of the transfer portion is shorter than that of the charging portion and an end portion of the surface includes a non-transfer area in contact with the charging portion and not in contact with the transfer portion. The voltage having the normal polarity is applied to the transfer portion when no recording material exists at the transfer portion, and the exposure unit exposes an area, including the non-transfer area of the surface that has passed through the transfer portion during application of the voltage, by a second exposure amount less than the first exposure amount.

Abstract: According to an aspect of the present disclosure, an image forming apparatus includes a feeding module, an image forming module, and a fixing module. The feeding module feeds a recording material. The image forming module includes a photosensitive drum and forms a developer image on the recording material fed to the image forming module by the feeding module. The fixing module fixes the developer image formed by the image forming module to the recording material. The image forming module includes a scanner frame that supports an exposure unit configured to expose the photosensitive drum. The feeding module is installed on the scanner frame.

Abstract: A fixing device includes a fixing rotator, a first heater, a second heater, and circuitry. The first heater heats a region on the fixing rotator to heat a recording medium having a width smaller than a predetermined width. The second heater heats a region on the fixing rotator to heat a maximum recording medium used in the fixing device. The second heater has a heat generation distribution in which a heat generation amount of each of both end portions corresponding to both end portions of the maximum recording medium in a width direction of the recording medium is larger than a heat generation amount of a center portion. The circuitry determines whether to turn on the first heater and turn off the second heater or to turn on both the first heater and the second heater based on a required power to bring the fixing rotator to a fixing temperature.

Abstract: A fixing device includes a heating rotating body, a pressure rotating body, and a fixing frame. The fixing frame supports the heating rotating body and the pressure rotating body. The fixing frame includes a pair of side plates and a plurality of stays. The side plates are disposed to face each other, and supports both axial end portions of the heating rotating body and both axial end portions of the pressure rotating body. The stays are disposed between the side plates. In a XYZ coordinate in which an axis along a direction in which the side plates face each other is defined as the X-axis, and axes perpendicular to the X-axis and perpendicular to each other are defined as the Y-axis and the Z-axis, each of the stays is fastened to the side plates at least two axial directions of the three axial directions of the XYZ coordinates.

Abstract: An image forming apparatus includes a sheet discharge unit having a rotary unit disposed downstream of a fixing nip in a sheet conveyance direction and discharging the sheet to outside of the image forming apparatus. The rotary unit includes bodies to abut the sheet which are disposed side by side in a width direction orthogonal to the sheet conveyance direction. A stacking unit stacks the sheet discharged by the sheet discharge unit, a fan blows air and includes a rotation shaft extending in the width direction, and a duct discharges the air toward the stacking unit. The rotary unit is disposed such that at least a part of the rotary unit enters an inside of the duct, and with respect to the width direction, at least a part of a first area in which the fan is disposed overlaps a second area in which the rotary unit is disposed.

Abstract: An image forming apparatus forms an image on a recording material and includes an apparatus body, a first process cartridge including a first photosensitive member and a first developing roller to supply first toner to the first photosensitive member, with the first process cartridge being detachably attached to the apparatus body, and a toner cartridge to accommodate the first toner and detachably attached to the apparatus body independently from the first process cartridge. A second process cartridge includes a second photosensitive member and a second developing roller to supply second toner to the second photosensitive member, with the second process cartridge being detachably attached to the apparatus body and configured not to be replenished with the second toner in a state where the second process cartridge is attached to the apparatus body.