A fixing member is supported so as to be displaceable in a crossing direction that crosses a sheet conveying direction. A pressure member rotationally drives the fixing member by being rotationally driven. A motor rotationally drives the pressure member. A biasing mechanism elastically biases the fixing member toward the pressure member. A sheet detection portion detects a sheet at a first position and a second position. The first position is a position between a mechanism that feeds the sheet to a fixing position and the fixing position in the conveyance path. The second position is a position between the fixing position and a mechanism that takes over conveyance of the sheet from the fixing device. A control device times a time required for detection results from the sheet detection portion to show a predetermined change, and controls a rotational speed of the motor according to the timed time.

An image forming apparatus includes an image forming portion, a fixing portion configured to heat and press the sheet conveyed from the image forming portion while nipping and conveying the sheet by a first nip portion to fix toner image to the sheet, a folding portion configured to fold the sheet, and a bonding portion configured to heat and press the sheet folded by the folding portion while nipping and conveying the sheet by a second nip portion to bond the sheet by powder adhesive. A peak value of pressure that the second rotary member pair applies to the sheet in the second nip portion is greater than a peak value of pressure that the first rotary member pair applies to the sheet in the first nip portion.

A fixing device includes an endless fixing belt, a heating roller that heats the fixing belt, a steering roller, and a pressurization rotating member. The steering roller is controlled to swing to move the fixing belt to a prescribed position. The pressurization rotating member pressurizes and forms a fixing nip portion with the fixing belt. When a recording material bearing unfixed toner is nipped and conveyed to the fixing nip portion, an unfixed toner image is fixed to the recording material. A single inclination operation that inclines the steering roller results in an inclination angle that is smaller when a recording material having a length greater than a predetermined length in a recording material conveying direction is conveyed to the fixing nip portion than when a recording material having a length less than or equal to the predetermined length in the conveying direction is conveyed to the fixing nip portion.

A fixing device includes an endless fixing belt, a heater, a pad, a stay and a pressing roller. The endless fixing belt rotates as a sheet is conveyed. The heater heats the fixing belt in a width direction. The pad comes into contact with an inner surface of the fixing belt in the width direction. The stay supports the pad inside the fixing belt. The pressing roller presses the fixing belt against the pad. The pad is made of metal.

A fixing apparatus includes a fixing belt, a steering roller, a pressure rotation member, and a contact-separation mechanism. The contact-separation mechanism moves the pressure rotation member to a position where the pressure rotation member is in a contact state with the fixing belt and a position where the pressure rotation member is in a separated state from the fixing belt. Swing of the steering roller is controlled so that the fixing belt moves to a predetermined position in a fixing belt width direction. A distance between a center position of the fixing belt in tilting the steering roller for a first time after the center position is separated from a center position of a range of movement of the fixing belt and the center position of the range of movement of the fixing belt in the width direction is smaller in the separated state than in the contact state.

A heating device includes a heater, a safety device, and a holder. The safety device has a heat-sensitive surface facing the heater. The safety device cuts off power supply to the heater in response to reaching a temperature of the heat-sensitive surface to be equal to or higher than a predetermined temperature. The holder holds the heater. The holder has a through hole that opens toward the heater and includes a step portion disposed on an inner circumferential surface of the through hole. The step portion supports an end of the heat-sensitive surface such that a central portion of the heat-sensitive surface of the safety device is not in contact with the heater.

A fixing device includes a first fixing member, a second fixing member, a charging portion, and a control portion. The first fixing member makes contact with a toner image on a sheet conveyed along a conveying passage. The second fixing member forms a nip. The charging portion generates an application current. The control portion can perform an application mode, in which the application current is generated, and a standby mode, in which no application current is generated. The control portion performs the application mode during a first period after initial start-up until the passage of a predetermined period and performs the standby mode during a second period after the passage of the first period until the passage of a predetermined period.

A formed article according to one embodiment of the present disclosure includes a cylindrical base layer containing a polyimide as a main component, a sliding layer disposed on an inner circumferential surface side of the base layer and containing a polyether ether ketone as a main component, and an outermost layer disposed on an outer circumferential surface side of the base layer and containing a fluororesin as a main component.

At a specified time within a heating period during which a fuser of a dry electrophotographic (DEP) printing device is heated to a set temperature, a temperature of the fuser is measured. Responsive to determining that the measured temperature is less than a threshold temperature, the set temperature to which the fuser is heated during the heating period is increased.

A fixing device to fix a toner image formed on a recording medium to the recording medium includes a rotating member, a guide member, a holding member, and a roller. The roller contacts with an outer surface of the rotating member and forms a fixing nip portion together with the guide member between the rotating member and the roller. The fixing device fixes the recording medium toner image to the recording medium while pinching and conveying the recording medium in the fixing nip portion. The guide member is pivotable relative to the holding member about a pivot point that is a shaft substantially perpendicular to a surface of the fixing nip portion. When the rotating member slides on the guide member, the guide member pivots due to a force received from the rotating member so that alignment of the guide member with respect to the holding member is corrected.