Abstract: An image forming apparatus that forms a toner image on a recording material includes: a temperature detection portion that detects the temperature of a heating member; a controller that controls the power to be supplied to the heating member so that the temperature detected by the temperature detection portion becomes the target temperature; and an acquisition portion that acquires information on a ratio of a region, where the toner image is formed, in a predetermined region located in an end portion of the recording material in a width direction thereof, and this controller changes the target temperature in accordance with the ratio.

Abstract: An image forming apparatus that forms a toner image on a recording medium includes an image forming unit, a fixing unit, and an output unit. The fixing unit includes a heating member and a backup member. The backup member forms a nip with the heating member. The output unit, provided on a downstream side of the nip, outputs the recording medium to an outside of the apparatus. The recording medium is conveyed at the nip with a side of the recording medium facing the heating member set as an upper side of the recording medium.

Abstract: A fixing apparatus for fixing a toner image on a recording material, while conveying the recording material bearing the toner image, at a nip portion includes a tubular film, a heater configured to heat the film, and a pressure member configured to form the nip portion with the film, wherein the film has a property that a resistance value per unit area between an outer surface of the film and an inner surface of the film becomes 5×1011 (?·cm2) or more when a voltage of 500 V or less is applied between the outer surface and the inner surface, and a resistance value per unit area between the outer surface and the inner surface becomes 5×109 (?·cm2) or less when a voltage of 1000 V or more is applied between the outer surface and the inner surface.

Abstract: An image forming apparatus that forms a toner image on a recording medium includes an image forming unit, a fixing unit, and an output unit. The fixing unit includes a heating member and a backup member. The backup member forms a nip with the heating member. The output unit, provided on a downstream side of the nip, outputs the recording medium to an outside of the apparatus. The recording medium is conveyed at the nip with a side of the recording medium facing the heating member set as an upper side of the recording medium.

Abstract: An image forming apparatus that forms a toner image on a recording material includes the following: a temperature detection portion that detects temperature of a heating member; a controller that controls power to be supplied to the heating member so that the temperature detected by the temperature detection portion becomes target temperature; and an acquisition portion that acquires information on a ratio of a region, where the toner image is formed, in a predetermined region located in an end portion of the recording material in a width direction thereof, and this controller changes the target temperature in accordance with the ratio.

Abstract: An image forming apparatus that forms a toner image on a recording medium includes: a fixing unit configured to fix the unfixed toner image on the recording medium while conveying the recording medium bearing the unfixed toner image at a nip portion, the fixing unit including a fixing rotating member and a pressure member forming the nip portion with the fixing rotating member; a counting portion configured to count cumulative rotation time of the fixing rotating member and a cumulative number of startups of said fixing unit; and a notifying portion configured to notify information about at least one of lifetime expiration of the fixing unit and necessity of replacing the fixing unit, wherein the notifying portion notifies the information in accordance with the cumulative rotation time and the cumulative number of startups.

Abstract: The image heating apparatus for heating an image formed on a recording medium has an endless belt with a base layer made of a metal material; a heater that contacts with an inner surface of the endless belt; and a backup member that forms a nip portion together with the heater through the endless belt. The image formed on the recording medium is heated while being pinched and conveyed in the nip portion. An end surface of the base layer includes a plane region and a curved surface region. When the thickness of the base layer is t, the width of the plane region in a thickness direction of the base layer is h, and the flatness ratio H of the end surface of the base layer is defined as h/t, the flatness ratio H satisfies 50%?H?90%.

Abstract: The image heating apparatus for heating an image formed on a recording medium includes an endless belt that includes a base layer made of a metal material; a heater that contacts with an inner surface of the endless belt; and a backup member that forms a nip portion together with the heater through the endless belt. The image formed on the recording medium is heated while being pinched and conveyed in the nip portion. An end surface of the base layer includes a plane region and a curved surface region. When the thickness of the base layer is t, the width of the plane region in a thickness direction of the base layer is h, and the flatness ratio H of the end surface of the base layer is defined as h/t, the flatness ratio H satisfies 50%?H?90%.