Abstract: An image heating device comprising: a first rotating member, a heater, a heater holder, and a second rotating member, wherein the heater holder has a flat surface portion provided downstream of the heater in a conveying direction of a recording material, the flat surface portion being in contact with the inner peripheral surface of the first rotating member, wherein the flat surface portion has a first region and a second region in a longitudinal direction, wherein the first region includes a region corresponding to a region of a nip portion through which a central portion of the recording material passes, and the second region is a region on an end portion side from the first region in the longitudinal direction, and wherein in the conveying direction, the downstream end portion of the second region is located upstream of the downstream end portion of the first region.

Abstract: A fixing device includes an endless belt-shaped section; a supply section that supplies a lubricating material to an inner surface of the belt-shaped section; a heating section that supports and rotates the belt-shaped section and generates heat during energization to heat the belt-shaped section; a power feed section that is electrically connected to an end part of the heating section and feeds power to the heating section; and a regulating section that is disposed on an outer surface side of the heating section and inside the power feed section with respect to an axial direction of rotation of the heating section to regulate movement of the lubricating material to a power feed section side.

Abstract: The image forming device includes a housing covering a device main body, a ventilation portion through which air is supplied and discharged, the ventilation portion being provided on a side face of the housing, and a leaked water catcher provided below the ventilation portion and protruding toward an interior of the device main body.

Abstract: An image forming apparatus includes an image forming unit configured to form an image on a sheet. The image forming unit includes a photosensitive member; a charger configured to charge the photosensitive member based on a charging potential; an exposure unit configured to expose the photosensitive member charged by the charger to light to form an electrostatic latent image on the photosensitive member, an exposure intensity of the exposure unit being controlled based on an exposure condition; a developing sleeve configured to develop the electrostatic latent image; and one or more processors configured to perform operations including controlling the image forming unit to form a line test image and a width test image.

Abstract: An image forming apparatus includes a plurality of image bearers, a plurality of optical writing devices, a plurality of image forming units, and circuitry. The plurality of optical writing devices scan and irradiate the plurality of image bearers with a plurality of light beams according to image data to form latent images on the plurality of image bearers. The plurality of image forming units develop the latent images formed on the plurality of image bearers. The circuitry changes scanning speeds of the plurality of light beams and sets, to each of the plurality of optical writing devices, a correction value of an image misregistration on corresponding one of the plurality of image bearers caused by a change of a scanning speed of corresponding one of the plurality of light beams.

Abstract: An image forming apparatus includes a light scanning device, a developing portion, a control portion and a storage portion. The storage portion stores an evaluation chart. The evaluation chart includes a first evaluation pattern and a second evaluation pattern. The first evaluation pattern includes a first patch row. The first patch row is formed by arranging a plurality of first evaluation patches. The first evaluation patch includes a first dot row, a second dot row and an auxiliary dot row. The second evaluation pattern includes a second patch row. The second patch row is formed by arranging a plurality of second evaluation patches.

Abstract: An image forming apparatus includes a light scanning device, a developing portion, a control portion and a storage portion. An evaluation chart includes a first evaluation pattern and a second evaluation pattern. The first evaluation pattern includes a first patch row. The first patch row is formed by arranging a plurality of first evaluation patches. The first evaluation patch includes a first dot row and a second dot row. The second evaluation pattern includes a second patch row. The second patch row is formed by arranging a plurality of second evaluation patches.

Abstract: An image forming apparatus includes a light scanning device, a developing portion, a control portion and a storage portion. The storage portion stores an evaluation chart. The evaluation chart includes a first evaluation pattern and a second evaluation pattern. The first evaluation pattern includes a first patch row. The first patch row is formed by arranging a plurality of first evaluation patches. The first evaluation patch includes a first dot row and a second dot row. The second evaluation pattern includes a second patch row. The second patch row is formed by arranging a plurality of second evaluation patches.

Abstract: An image forming apparatus includes an image forming portion, a transfer unit, a power supply, and a reader. A test chart is formed by transferring test images to a recording material while applying test voltages from the power supply to the transfer unit. A transfer voltage to be applied to the transfer unit during transfer is set based on the read test images. A reference image is formed on the test chart. The reader reads the test chart by scanning the test chart from a first position to a second position that falls within the test images. The first position falls within a boundary of the recording material on which the test chart is formed and falls outside the test images. Based on the reference image, the result of the reader reading the test chart is obtained by scanning the test chart from the first position to the second position.

Abstract: An image forming apparatus includes (i) a housing including a first connector, (ii) a drum unit, (iii) a development unit including a containing portion containing toner and movable between an abutment position and a separation position, (iv) a detection unit including a light emitting element, a light receiving element, and a second connector electrically connected to the light emitting element and the light receiving element, and mounted on the development unit, and (v) a connection member connected to the first connector and the second connector to electrically connect the first connector and the second connector each. A length of the connection member is longer than a first distance from the first connector to the second connector when the development unit is located at the abutment position, and is longer than a second distance from the first connector to the second connector when the development unit is located at the separation position.

Abstract: A heating device has a first rotating member that is heated by a heat source, and a second rotating member that forms a nip portion with the first rotating member, such that a recording material is heated up at the nip portion. The heating device further has: a first cover disposed along an outer peripheral surface of the first rotating member, so as to surround the first rotating member, and a second cover, disposed between the first cover and the first rotating member, and having a protruding portion that protrudes towards the first rotating member. In a longitudinal direction of the first rotating member, a length of the first rotating member is a first length, and a length of the protruding portion is a second length that is smaller than the first length.

Abstract: An image forming apparatus includes an image carrying member, an intermediate transfer belt, a primary transfer roller, a first belt support roller, a secondary transfer roller, a second belt support roller, a current output portion, a current sensing portion, and a control portion. The current output portion passes across the secondary transfer roller a secondary transfer current as part of an output current. The current output portion and the second belt support roller are electrically connected together. The current sensing portion senses a leakage current passing from the first belt support roller via the intermediate transfer belt to the second belt support roller. The control portion sets the output current such that the secondary transfer current has a value given by subtracting a leakage current from the output current and keeps the voltage on the second belt support roller between ?50 V and 50 V, inclusive.

Abstract: According to one embodiment, an image forming apparatus includes a driving unit, a first determination unit, a second determination unit, and an output unit. The first determination unit is configured to determine whether or not a rotation abnormality relating to rotation of the driving unit occurs. The second determination unit is configured to determine whether or not a signal abnormality relating to a signal line of a current signal of the driving unit occurs based on a current value of the current signal after the first determination unit determines whether or not the rotation abnormality occurs. The output unit is configured to output a determination result of the second determination unit.

Abstract: A toner cartridge according to one example embodiment includes a housing having a reservoir for holding toner. A first latch-receiving shelf is positioned on a first longitudinal end of the housing and a second latch-receiving shelf is positioned on a second longitudinal end of the housing. Contact surfaces on top portions of the first and second latch-receiving shelves are positioned to contact corresponding first and second latches in an image forming device. The contact surface of the first latch-receiving shelf is positioned lower than a first rotational axis of a first drive coupler of the toner cartridge and higher than a second drive coupler of the toner cartridge. The contact surface of the second latch-receiving shelf is positioned lower than at least a portion of a first electrical contact of the toner cartridge and higher than at least a portion of a second electrical contact of the toner cartridge.

Abstract: An image forming apparatus includes an image forming unit to form an image based on an image forming condition; a sensor to measure a measurement image formed by the image forming unit; and a controller to obtain information correlated with a change in density of an image to be formed by the image forming unit, control the sensor to measure the measurement image, determine first data related to density of the image to be formed by the image forming unit, determine, based on a result of measuring the measurement image, second data related to density of the image to be formed by the image forming unit, and generate the image forming condition based on a weighted average of the first data and the second data.

Abstract: An image forming apparatus equipped with an exposure device including a plurality of light emitting points, includes a photoconductor and a processor. The processor controls the light emission of each of the plurality of light emitting points of the exposure device based on the image to be formed. The processor calculates a fourth correction coefficient by changing a third correction coefficient, which is calculated based on a first correction coefficient for correcting a first physical quantity related to the exposure condition of the photoconductor by the light emitting point, and a second correction coefficient for correcting a second physical quantity related to the exposure condition of the photoconductor by the light emitting point, based on the light emission time set according to the gradation of the image to be formed, and corrects the light output of each of the plurality of light emitting points by the fourth correction coefficient.

Abstract: An image forming apparatus includes: an image carrier that extends in a first direction; a light emitter that includes a substrate that extends in the first direction, and multiple light-emitting devices that are disposed on the substrate and emit light to the image carrier; a positioning portion that is disposed between the substrate and the image carrier, and that fixes a position of the light emitter with respect to the image carrier in at least one direction perpendicular to a light emission direction; and an adjuster that is located to overlap the positioning portion when viewed in the first direction, and that adjusts a position of the light emitter in the light emission direction.

Abstract: An image forming apparatus includes an image bearing member, an intermediate transfer belt, and a contact member. The intermediate transfer belt includes a base layer, a surface layer formed on an outside of the base layer, and an inner surface layer formed on an inner side of the base layer. A position at which the contact member and the intermediate transfer belt contact is arranged on a downstream side of the intermediate transfer belt in a rotation direction of the intermediate transfer belt. Rv>Rs1 and Rs2>Rs1, and Rs2/Rv?40 are satisfied where Rv (?) is a volume resistance value of the intermediate transfer belt in a thickness direction, Rs1 (?) is a first surface resistance value of the inner surface layer side in a surface direction, and Rs2 (?) is a second surface resistance value on the surface layer side in a surface direction.

Abstract: According to at least one embodiment, an image forming apparatus includes a heater and a controller. The heater is configured to generate heat. The controller is configured to control AC power to the heater so that a part of the AC power which exceeds a threshold voltage is not applied to the heater.

Abstract: A light-emitting device includes: a first light-emitting unit that extends in one direction and that has a first emission surface that emits light located along the one direction; a second light-emitting unit that is located in the one direction with respect to the first light-emitting unit, that extends in the one direction, and that has a second emission surface that emits light located along the one direction; a cleaning unit that is capable of moving in the one direction and an opposite direction that is opposite to the one direction to clean the first emission surface; a transmission part that extends from the cleaning unit in the one direction and that transmits a moving force for moving the cleaning unit to the cleaning unit; and an extending part that extends from the transmission part in the one direction to elongate the transmission part.