An image forming apparatus includes: a support body; an elastic member in close contact with the support body; an endless belt; and a nip portion. The nip portion is formed by the elastic member and the endless belt. The support body in close contact with the elastic member pressed at the nip portion is made of an aluminum alloy containing silicon. The content of silicon in the aluminum alloy is within a range of 0.8 to 12.0% by mass.

A fixing device includes a belt a rotation member, and a nip formation member, wherein the nip formation member includes a sliding member, wherein the sliding member includes a base member and a sliding portion having a plurality of protrusions, a first region that is a surface where the sliding portion including the plurality of protrusions is provided at a center part of the sliding member in a longitudinal direction, and a second region that is a surface same as the base member of the first region, disposed outside the first region in the longitudinal direction, and not including the sliding portion, and wherein, in a conveyance direction of the recording medium, an upstream end at a first position in the first region is positioned upstream of an upstream end at a second position in the second region.

An image forming apparatus includes a transfer roller, a fuser, a chute, a drive source, a reciprocating mechanism, and a controller. The transfer roller transfers toner to a sheet. The fuser fixes toner on the sheet. The chute is located upstream from the fuser in a sheet conveying direction. The chute is configured to convey the sheet toward the fuser. The chute is movable between a first position and a second position. The reciprocating mechanism reciprocates by drive force from the drive source and moves the chute between the first position and the second position. The controller executes: a first mode of actuating the drive source when conveying one sheet; and a second mode of not actuating the drive source when conveying one sheet. The controller switches between the first mode and the second mode in a middle of a print job.

An image forming apparatus includes a fixing member that includes a heater that generates heat in accordance with a predetermined fixing temperature to fix an unfixed image held on a medium, a bend detector that is disposed upstream from the fixing member in a medium transport direction to detect a bend of a medium having a leading end arriving at the fixing member, and a heating control member that controls the heater based on the bend of the medium detected by the bend detector.

An image forming apparatus includes a conveyance member to convey a sheet, an image forming unit, a fixing device, a component, and a controller. The image forming unit forms a toner image on the conveyed sheet conveyed. The fixing device fixes an unfixed toner image formed on the sheet, onto the sheet. Heat of the fixing device propagates to the component. The controller controls a passing sheet interval between a plurality of sheets passing through the fixing device. The controller executes throughput control for controlling a sheet interval, which is an interval between a preceding sheet and a subsequent sheet passing through the fixing device, such that a temperature of a non-passage region through which sheets do not pass in the fixing device is suppressed to a predetermined first limit temperature or less and a temperature of the component is suppressed to a predetermined second limit temperature or less.

An image forming apparatus includes a fixing unit, a detector detecting inside temperature and humidity. The apparatus executes a continuous image forming job in which first and second recording materials of first and second basis weights are mixedly included, in a first mode in which a fixing temperature of the fixing unit is set to a first temperature in a case of the first basis weight and is set to a second temperature lower than the first temperature in a case of the second basis weight smaller than the first basis weight, and in a second mode in which the setting temperature is set to a common temperature irrespective of the basis weight. A display displays that the second mode cannot be applied to the job in a case where both the inside temperature and humidity are not within a predetermined range when the second mode has been input.

An image forming apparatus includes: a fixer that fixes a toner image on a sheet; and a controller that sets a target glossiness, and adjusts at least one parameter selected from a fixing target temperature and a conveyance condition of the sheet in the fixer, using a gloss control temperature, to achieve the target glossiness that has been set.

An image forming apparatus includes an image forming portion configured to form a toner image on a recording material; a fixing portion configured to fix the toner image, on the recording material, formed on the recording material by the image forming portion; an input portion configured to input information on the recording material; and a controller. In a case where the controller executes an operation in a first mode in which the toner image is formed on a pressure-bonded recording material bent and pressure-bonded so that one surface of the recording material becomes an opposing inner surface, the controller controls the fixing portion on the basis of first information on a basis weight of the pressure-bonded recording material and second information on a folding shape of the pressure-bonded recording material, which are inputted by the input portion.

An image forming apparatus includes the following. A medium oscillating mechanism oscillates the recording medium. A medium sensing section senses a position of an end of the recording medium. A belt correction mechanism is configured to correct a position of a belt. A belt sensing section senses the position of the end of the belt. A hardware processor performs first rectification control in which the medium oscillating mechanism rectifies the position of the end of the recording medium based on sensing by the medium sensing section, and second rectification control in which the belt correction mechanism rectifies the position of the end of the belt based on sensing by the belt sensing section. The hardware processor performs a correction to the second rectification control in a case in which the first rectification control is performed with the recording medium straddling both the medium oscillating mechanism and the belt.

An image forming apparatus includes a fixing roller to fix an image by heating a sheet on which the image is transferred and to convey the sheet. In a case in which a first plain paper of which a sheet length in a sheet conveyance direction is equal to or more than a predetermined length is conveyed, the fixing roller conveys the first plain paper at a first speed. In a case in which a second plain paper of which the sheet length is less than the predetermined length is conveyed, the fixing roller conveys the second plain paper at a second speed less than the first speed. In a case in which an envelope of which the sheet length is less than the predetermined length is conveyed, the fixing roller conveys the second envelope at the first speed.