There is provided image forming apparatus including: casing; temperature sensor configured to detect temperature in the casing; image forming unit configured to form toner image on sheet; fuser which has heating member configured to heat the sheet, and which is configured to fix the toner image to the sheet; a fan; and a controller. The controller is configured to execute: changing of driving speed of the fan; and waiting control including: stopping supply, to the image forming unit, of next sheet, before the changing of the driving speed; completing the fixing of the toner image to the sheet, before the changing of the driving speed; and restarting supply of the next sheet to the image forming unit after the changing of the driving speed and after waiting time has elapsed since the completion of the fixing of the toner image to the sheet.

An example fuser includes a flexible fixing belt, a back-up to form a fixing nip with the fixing belt, a heater substrate having a first surface on which a heating element pattern is located and a second surface opposite to the first surface, the heater substrate to heat the fixing belt at the fixing nip, and a heat conduction member having a plurality of heat conduction segments contacting the first surface of the heater substrate.

An endless belt includes a metal substrate, and a heat-resistant resin layer that is disposed as an innermost layer on an inner peripheral surface of the metal substrate and that contains a resin and a thermally conductive filler having an aspect ratio of 20 or more. In the heat-resistant resin layer, an orientation ratio of the thermally conductive filler with respect to a circumferential direction of the endless belt is 20% or more.

A nip former that forms a nip between an endless belt and a pressure rotator includes a base that is made of aluminum and has a nip forming face disposed opposite the nip. An anodic oxidation coating is treated with sealing and coats at least the nip forming face. The anodic oxidation coating has a thickness that is not smaller than 22 μm and is not greater than 45 μm and a variation in thickness that is not greater than 20 percent. The base and the anodic oxidation coating define a nip forming portion that is disposed opposite the nip. The nip forming portion has a thickness that is not smaller than 0.40 mm and is not greater than 1.20 mm.

An image forming apparatus includes an image forming device that forms an image on a recording material, a forming device storage space storing the image forming device, a temperature adjustment space where a temperature adjustment device adjusts temperature, and a supply unit that supplies air in the temperature adjustment space into the forming device storage space.

A control unit controls power to be supplied to a common power supply path in a first period, using a selected first temperature detection member, and controls power to be supplied to the common power supply path in a second period, using a selected second temperature detection member. The first temperature detection member has a higher detected temperature than that of the second temperature detection member, and in the second period, the first detected temperature and the second detected temperature fall within a temperature range between a first temperature and a second temperature lower than the first temperature.

An image-forming apparatus that can restrict reduction in the accuracy of image formation onto a recording material is provided. An image-forming apparatus includes an image-former that discharges ink to a conveyed recording material; a recording-material heating unit that is disposed in an upstream side of the image-former; a chassis that covers the recording-material heating unit; and a shielding member that is disposed between the chassis and the image-former and shields inflow of air, which is discharged from a recording-material outlet, into the image-former.

A fixing device includes a tubular body in a tubular shape that forms a nip with a pressurizing member. The heater, disposed inside the tubular body, faces a part of the tubular body in a circumferential direction. The heat equalizing member is disposed on an opposite side of a side where the heater faces the tubular body. The heat equalizing member transfers heat from a place having a high temperature to a place having a low temperature in a second direction along an axial direction of the tubular body. The heat conductive member, disposed between the heater and the heat equalizing member, can conduct the heat in each of the second direction and a first direction in which the heater and the heat equalizing member face each other. A side portion of the heat conductive member in the second direction is divided into three or more portions.

An image forming apparatus includes an image forming portion configured to form a toner image on a sheet, a fixing portion configured to heat and pressurize the sheet bearing the toner image to fix the toner image to the sheet, a shutter provided to be movable to an open position at which the shutter opens an opening that the sheet being conveyed toward the fixing portion is able to pass through, and a closed position at which the shutter closes the opening, an urging portion configured to urge the shutter toward the open position, and an abutment portion that the shutter urged toward the open position by the urging portion abuts to be positioned at the open position.

An image forming apparatus includes plural image forming units and a controller. The plural image forming units are configured to form images of colors using colorants, respectively. The controller is configured to perform control such that the plural images formed by the plural image forming units are output as one image onto a recording medium. At least two of the image forming units are configured to form images using colorants of special colors, respectively and are arranged in succession.