Abstract: An image forming apparatus includes an image bearing member, an exposure portion, a developing portion including a developer carrying member, a transfer portion, a development separation portion, a transfer separation portion, a storing portion, and a controller. Before a present image forming operation, the controller controls the transfer separation portion to put the image bearing member and the transfer portion in a separation state and controls the development separation portion to put the image bearing member and the developer carrying member in a separation state, and then the controller carries out control to determine whether or not pre-exposure for exposing the image bearing member to light by the exposure portion is executed, depending on a standing time from an end of a last image forming operation to a start of the present image forming operation and on information stored in the storing portion.

Abstract: An image forming apparatus having front and rear surfaces, a photoreceptor having a rotation axis extending in a first direction, an exposure unit, and a cooling unit. The exposure unit includes a substrate having a longitudinal axis extending in the first direction, a first surface and a second surface. A plurality of light emitting elements that emit light toward the photoreceptor are mounted on the first surface of the substrate. The cooling unit includes an intake port that sucks air from outside of the image forming apparatus. The intake port is disposed at an intake port distance in the first direction to the rear surface. The intake port distance is shorter than a distance in the first direction of a center of the substrate to the rear surface. The cooling unit cools the substrate by blowing air sucked by the intake port onto the second surface of the substrate.

Abstract: A magnet roller includes a shaft, a plurality of magnets, and an adhesive. The plurality of magnets is arranged in a circumferential direction of a shaft center of the shaft on an outer surface of the shaft. The adhesive bonds the shaft and the plurality of magnets to each other. At least one of the magnets has a recess portion recessed with respect to a surface of the shaft, the surface facing the outer surface.

Abstract: An image forming apparatus includes a photosensitive drum, a developing roller, fixing unit including a fixing film, a pressure roller, and a heating member that forms a fixing nip portion between itself and the pressure roller, and a driving source that transmits driving force to the developing roller and the pressure roller. Whether recording material is a normal-sized sheet or a small-sized sheet is determined, and in a case of the normal-sized sheet a first mode is executed in which a post-rotation operation is performed following the recording material passing the fixing nip portion, while in a case of the small-sized sheet a second mode is executed in which the post-rotation operation and processing to place in an image forming job-stop state are performed, the driving source is stopped, thereafter the driving source is driven, and thereafter the driving source is stopped.

Abstract: An image forming apparatus includes a transfer portion, a fixing portion, a detection unit configured to detect a bending amount of the sheet nipped between the transfer portion and the fixing portion, and a control unit. The detection unit includes a rotation portion configured to rotate in a rotation direction from a standby position by being pressed by the sheet nipped by the transfer portion and the fixing portion, a rotary encoder configured to output a pulse signal corresponding to a rotation amount of the rotation portion, and a rotation detector configured to detect that the rotation portion has reached a detection position downstream of the standby position in the rotation direction. The control unit controls a sheet conveyance speed of the fixing portion based on the pulse signal output from the rotary encoder after the rotation detector detects that the rotation portion has reached the detection position.

Abstract: An image forming apparatus capable of performing a supplying operation for supplying toner from a supply container detachably mountable thereto includes an image bearing member, a developing member, a developing container, a detecting portion, a notifying portion, and a controller for carrying out control so as to cause the notifying portion to notify a timing to perform a toner supplying operation when a toner amount detected by the detecting portion is smaller than a threshold. The controller carries out control so as to set the threshold to a first threshold in a case where a print ratio after the last supplying operation is a predetermined print ratio or more and to set the threshold to a second threshold higher than the first threshold in a case where the print ratio is less than the predetermined print ratio.

Abstract: A drum cartridge includes: a drum frame to which a developing cartridge is attachable; a photosensitive drum; and a first storage medium. The drum frame has one end portion and another end portion spaced apart from the one end portion in a first direction. The photosensitive drum is rotatable about a first axis extending in a second direction and is positioned at the one end portion of the drum cartridge. The first storage medium includes a first electrical contact surface. The first storage medium is positioned at an outer surface of the drum frame, the outer surface being exposed in a state where the developing cartridge is attached to the drum frame.

Abstract: The delivery management apparatus is configured to acquire information on a consumption state of one or more consumables used in each of the one or more image forming apparatuses, determine a same timing of delivery of the one or more consumables to the one or more image forming apparatuses, based on the information, generate an adjustment setting for a consumption amount of the one or more consumables, for the each image forming apparatus, based on the same timing of delivery, and transmit, to the each image forming apparatus, the adjustment setting for the each image forming apparatus. The each image forming apparatus is configured to transmit the information to the delivery management apparatus, receive the adjustment setting, and perform the adjustment setting.

Abstract: A power supply device according to the present disclosure includes an AC voltage output circuit and a DC voltage output circuit. The DC voltage output circuit includes a first voltage dividing resistor provided between a power supply line of a voltage output portion and a ground potential, a second voltage dividing resistor provided between the first voltage dividing resistor and the ground potential, a capacitor provided in parallel with the second voltage dividing resistor, and an operational amplifier. An output of the AC voltage output circuit is connected to the voltage output portion of the DC voltage output circuit. A cutoff frequency of a low-pass filter circuit constituted of the first voltage dividing resistor, the second voltage dividing resistor, and the capacitor is set to be lower than a frequency of the AC voltage output from the AC voltage output circuit.

Abstract: Disclosed is a cartridge attachable to an image forming apparatus body, the cartridge including: a memory member storing information relating to the cartridge; and a supporting body having a memory mounting portion on which the memory member is mounted, the memory member having a first surface, a second surface, and a lateral surface, the first surface is provided with a contact portion connected to a body electrode portion of the body of the image forming apparatus when the cartridge is installed in the body of the image forming apparatus, the memory mounting portion has a first opposing portion opposing the second surface and a second opposing portion opposing the lateral surface when the memory member is mounted, the memory member is mounted by adhesive between the second surface and the first opposing portion and between the lateral surface and the second opposing portion.

Abstract: A light source includes a light emitting element, and an optical system that directs light output from the light emitting element to a surface of a photosensitive member. An irradiation amount of light for forming a second electrostatic latent image is larger than an irradiation amount of light for forming a first electrostatic latent image. A position at which a propagation efficiency of light peaks in a scanning direction of the light is located between a center of an image height of the optical system and a surface area in which the second electrostatic latent image is formed out of the surface of the photosensitive member.

Abstract: An image forming apparatus includes a tray configured to mount a process cartridge. The process cartridge includes: a developing unit provided with a developing member; a photosensitive unit provided with a photosensitive member; a side member disposed at a longitudinal end of the process cartridge, the developing unit and the photosensitive unit being arranged along a front-rear direction and movably connected by the side member; a resetting member configured to elastically deform and apply a force to the photosensitive unit when the developing unit moves relative to the photosensitive unit; and a positioning member provided on at least one of the side member and the photosensitive unit, the positioning member being configured to abut the tray in the front-rear direction when the developing unit moves relative to the photosensitive unit.

Abstract: An image forming apparatus includes an image forming unit, a main housing, a sheet tray, and a first circuit board removably installed in the main housing. The main housing accommodates the image forming unit and has a bottom surface, a first side surface on one side, and a second side surface on another side. A first side cover forms the first side surface, and a second side cover of the image forming unit forms the second side surface. The sheet tray is positioned between the first side cover and the second side cover in a first direction. The main housing includes an opening in the bottom surface between the first side cover and the sheet tray in the first direction. The opening allows communication between outside and inside of the main housing and allows the first circuit board to pass therethrough when it is being installed into the main housing.

Abstract: A developing cartridge includes a casing, a developing roller, a shaft, and a first cam. The developing roller is rotatable about an axis extending in a first direction. A part of a peripheral surface of the developing roller is exposed on one side in a second direction. The developing roller is positioned at one end portion of the casing in a third direction crossing both the first direction and the second direction. The shaft extends in the first direction and is movable in the first direction relative to both the casing and the developing roller. The first cam is positioned at one end portion of the shaft in the first direction and is movable in the first direction together with the shaft. The shaft and the first cam are positioned at an other end portion of the casing in the third direction.

Abstract: An image forming device includes a toner image former forming, on a paper sheet, a toner image based on image information; a fixer including at least a pair of rollers and fixing the toner image by nipping, with a pressing member formed by the pair of rollers, the paper sheet on which the toner image is formed; an adjuster adjusting a pressure contact force applied by the pressing member to either a first pressure contact force or a second pressure contact force that is weaker than the first pressure contact force; and a controller controlling execution of a job related to image formation via the fixer, in which the controller provides a user with a notification that prompts the user to operate the adjuster for adjusting the pressure contact force to either the first pressure contact force or the second pressure contact force in accordance with the previously executed job.

Abstract: An image-forming apparatus includes a housing, a cartridge, a fixing device, a shutter, a link connected to the shutter, and an electrical contact. The fixing device includes a heating unit. The shutter is movable between a closing position for covering an upstream end of the heating unit in a sheet conveying direction and an opening position for uncovering the upstream end of the heating unit. The link is provided on the housing and is configured to abut on the cartridge to move the shutter between the closing position and the opening position. The electrical contact is provided on the housing and contacts an electrical contact surface of a memory of the cartridge attached to the housing. In the housing, the link and the electrical contact are positioned on opposite sides of a center line of the attached cartridge in a widthwise direction orthogonal to an attachment/detachment direction of the cartridge.

Abstract: A toner container for use with a developer unit of an image forming device includes a body having a reservoir for holding toner and an engagement arm that is movable relative to the body between a disengaged position and an engaged position. The engagement arm includes a first engagement surface for contacting a cam surface in the image forming device and receiving an actuation force from the cam surface to move the engagement arm from the disengaged position to the engaged position when the toner container is inserted into the image forming device. The engagement arm includes a second engagement surface for contacting and applying a hold-down force on a portion of the developer unit when the engagement member moves from the disengaged position to the engaged position when the toner container is inserted into the image forming device with the developer unit installed in the image forming device.

Abstract: An image forming apparatus, a first and second toner container storing a first and second toner are attachable, a first and second photosensitive drum, a first and second toner accommodation portion, a first and second toner supply port, and a cover portion. A first and second toner supply operation where first and second toner is supplied from the first and second toner container to the first and second toner accommodating portion through the first and second toner supply port when the cover portion is in the open position. The first and second toner supply operation are performed by user operations including directly manipulating the first and second toner container to discharge the first and second toner through the first and second toner supply port while the first toner container is attached to the first toner supply port and the second toner container is attached to the second toner supply port.

Abstract: An image forming apparatus includes an image forming section, an optical scanning device, an image density sensor, and a control unit. The optical scanning device scans the surface of the image carrying member with light emitted from light sources to form an electrostatic latent image. The control unit can perform light amount calibration to adjust the exposure amount of the light scanning device based on the density of a reference image detected by the image density sensor. The reference image used for light amount calibration has a dot pattern in which as many individual dots as there are light sources are arrayed at regular intervals in the main scanning direction. The dot pattern is formed repeatedly in the main and sub scanning directions. The dots forming the dot pattern are arranged at different positions in the sub scanning direction to be displaced in units of pixels from each other.

Abstract: In an image forming device, a device body has an opening. A process member forms a developer image on a sheet. The fixing device fixes the developer image on the sheet. A fixing device is removable from the device body through the opening. A process-power supply member supplies process-power to the process member based on power inputted from a power supply member. A switch switchable between: a first state in which the switch allows connection between the process-power supply member and the power supply member; and a second state in which the switch disconnects the process-power supply member from the power supply member to interrupt input of the process-power to the process-power supply member. The switch switches to the first state when the fixing device is mounted in the device body. The switch switches to the second state when the fixing device is removed from the device body.