Abstract: A heating device includes a heater that heats an object to be heated. A holder supports the heater and includes an engaged portion. The heater includes a contact face that contacts the object to be heated. The heater further includes a separation restrictor that engages the engaged portion of the holder to restrict motion of the heater in a separating direction in which the heater separates from the holder. The separating direction is perpendicular to the contact face.

Abstract: A heating device includes an endless belt that rotates in a rotation direction and a pressure rotator that contacts an outer circumferential surface of the endless belt to form a nip between the endless belt and the pressure rotator. A heater sandwiches a lubricant together with the endless belt. The heater includes a heat generator that defines a conveyance span in a longitudinal direction of the heater, where a heating target having a predetermined width in the longitudinal direction of the heater is conveyed through the nip, and a non-conveyance span in the longitudinal direction of the heater, where the heating target is not conveyed. A non-conveyance span temperature detector is disposed opposite the endless belt in the non-conveyance span of the heat generator. The non-conveyance span temperature detector detects a temperature of the endless belt.

Abstract: A fixing device includes a first rotator, a second rotator disposed opposite the first rotator to form a nip with the first rotator, a heater including a base and a heat generator, and a non-contact temperature detector to detect a temperature of the heater. The heater contacts an inner circumferential surface of the first rotator. The non-contact temperature detector is disposed opposite the inner circumferential surface of the first rotator via the base and disposed at a predetermined distance from the heater.

Abstract: A heating device includes a heater and an interrupting portion. The heater extends in a width direction of a rotary belt and configured to contact and heat the belt. The interrupting portion is configured to interrupt power supply at a longitudinal end portion of the heater.

Abstract: A heating device includes a base, resistance heating elements, a power control circuit, a first temperature detector, a second temperature detector, a power interrupter, and control circuitry. The resistance heating elements are arranged in a longitudinal direction of the base and electrically connected in parallel. The first detector detects a temperature of a first resistance heating element. The second detector detects a temperature of a second resistance heating element. The power interrupter interrupts power supplied to the resistance heating elements when the temperature of the second resistance heating element becomes a predetermined temperature or more.

Abstract: An image forming apparatus includes a resistive heat generator, a temperature detector, and a power controller that detects a temperature-resistance property of the resistive heat generator before the resistive heat generator is used when the resistive heat generator is removably installed. The power controller obtains power supplied to the resistive heat generator and a change in a temperature of the resistive heat generator, that is detected by the temperature detector, while the power controller supplies the power at a predetermined power duty cycle for adjustment to the resistive heat generator. The power controller calculates the temperature-resistance property of the resistive heat generator based on the power and the change in the temperature that are obtained. The power controller adjusts a power duty cycle at which the power is supplied to the resistive heat generator in use of the resistive heat generator, based on the temperature-resistance property.

Abstract: A heater includes a base and at least one resistive heat generator mounted on a face of the base. At least one electrode supplies power to the at least one resistive heat generator. A conductor couples the at least one electrode with the at least one resistive heat generator. A slide layer covers the at least one resistive heat generator and the conductor. The slide layer includes a projecting portion that defines a surface of the slide layer. The projecting portion is defined by a film thickness of at least one of the conductor and the at least one resistive heat generator. The projecting portion includes an upstream projection disposed opposite a lateral end of the base in a longitudinal direction of the base and a downstream projection disposed downstream from the upstream projection in a rotation direction of an endless belt that slides over the heater.

Abstract: A heating device includes an endless rotator that rotates in a rotation direction. A heater contacts the endless rotator. An elastic body is disposed opposite an inner circumferential surface of the endless rotator and disposed downstream from the heater in the rotation direction of the endless rotator. A holder holds the heater and the elastic body. A pressure rotator is disposed opposite the heater and the elastic body via the endless rotator to form a nip between the endless rotator and the pressure rotator. A slide sheet covers a surface of the elastic body. The slide sheet includes an upstream end in the rotation direction of the endless rotator. The upstream end is sandwiched between the heater and the elastic body and between the elastic body and the holder. The upstream end is secured to the holder.

Abstract: A heater includes a base layer, a heat generator mounted on the base layer, and a slide layer mounted on the base layer. A sliding face of a counterpart slides over the slide layer. The slide layer is made of a material containing fluorine and includes a slide face that contacts the sliding face of the counterpart. The slide face of the slide layer has a surface roughness that is greater than a surface roughness of the sliding face of the counterpart.

Abstract: A heating device includes a heater including a heat generator that generates heat as the heat generator is supplied with power. A feeding member contacts the heater and feeds the power to the heat generator. An endless belt rotates and is heated by the heater. A driving roller contacts an outer circumferential surface of the endless belt. A driving force transmitter is disposed at one lateral end of the driving roller in an axial direction of the driving roller. The driving force transmitter transmits a driving force that drives and rotates the driving roller. The feeding member is made of a corson copper alloy and is disposed in a non-driving side defined by a center of the heat generator in a longitudinal direction of the heater. The non-driving side is opposite a driving side in the longitudinal direction of the heater, where the driving force transmitter is disposed.

Abstract: A heating device includes a heater that includes a heat generator configured to generate heat as the heat generator is supplied with power. A feeding member is configured to contact the heater and feed the power to the heat generator. The feeding member is made of a corson copper alloy.

Abstract: A fixing device includes an endless belt that rotates and a pressure rotator that rotates and presses against the endless belt to form a fixing nip between the endless belt and the pressure rotator, through which a recording medium bearing an image is conveyed. A heater is disposed inside a loop formed by the endless belt. The heater heats the endless belt. A conductor is disposed upstream from the pressure rotator in a recording medium conveyance direction and grounded. The conductor contacts and detects the recording medium.

Abstract: A heating device includes an endless rotator that rotates in a rotation direction and a heater that contacts an inner circumferential surface of the endless rotator and extends in an axial direction of the endless rotator. An elastic body contacts the inner circumferential surface of the endless rotator and is disposed downstream from the heater in the rotation direction of the endless rotator. A holder holds the heater and the elastic body. A pressure rotator is disposed opposite the heater and the elastic body via the endless rotator to form a nip between the endless rotator and the pressure rotator. A motion restrictor is mounted on the holder. The motion restrictor restricts motion of the heater downstream in the rotation direction of the endless rotator.

Abstract: A heater includes a base and at least one resistive heat generator mounted on a face of the base. At least one electrode supplies power to the at least one resistive heat generator. A conductor couples the at least one electrode with the at least one resistive heat generator. A slide layer covers the at least one resistive heat generator and the conductor. The slide layer includes a projecting portion that defines a surface of the slide layer. The projecting portion is defined by a film thickness of at least one of the conductor and the at least one resistive heat generator. The projecting portion includes an upstream projection disposed opposite a lateral end of the base in a longitudinal direction of the base and a downstream projection disposed downstream from the upstream projection in a rotation direction of an endless belt that slides over the heater.

Abstract: An image forming apparatus includes a heating device including a heat generator and a resistance value identifier, a body, a resistance value acquisition unit, a detector to detect detachment and attachment of the heating device from and to the body, and an electric power controller. The resistance value identifier corresponds to a resistance value of the heat generator. The resistance value acquisition unit acquires the resistance value from the resistance value identifier. The electric power controller causes the resistance value acquisition unit to acquire the resistance value when the detector detects detachment and attachment of the heating device. The electric power controller changes a lighting duty of the heat generator when the acquired resistance value of the heat generator is different from the resistance value before the detector detects detachment and attachment of the heating device.

Abstract: A temperature detector for being positioned with respect to a counterpart includes a temperature detecting element that detects a temperature of a detecting target and a holding body that holds the temperature detecting element. A projecting engagement engages the counterpart and is mounted on the holding body.

Abstract: A heating device includes a belt that rotates in a rotation direction and has a temperature decrease span in an axial direction of the belt, where the belt is susceptible to temperature decrease. A resistive heat generator is disposed opposite the belt. The resistive heat generator heats the belt and extends in the axial direction of the belt. The resistive heat generator includes a primary heat generating portion that generates heat in a first heat generation amount and a secondary heat generating portion that is disposed outside the primary heat generating portion and disposed opposite the temperature decrease span of the belt. The secondary heat generating portion generates heat in a second heat generation amount that is greater than the first heat generation amount of the primary heat generating portion.

Abstract: A fixing device includes a heater including a heat generator that is divided into a plurality of heat generating portions in an axial direction of the endless belt. The heat generator defines a dividing region between adjacent ones of the plurality of heat generating portions and a non-dividing region other than the dividing region. A primary guide contacts and guides the endless belt. The primary guide is disposed opposite the dividing region of the heat generator and has a first thermal capacity. A secondary guide contacts and guides the endless belt. The secondary guide is disposed opposite the non-dividing region of the heat generator and has a second thermal capacity that is greater than the first thermal capacity.

Abstract: A heating device includes an endless belt that rotates and a pressure rotator that rotates in a rotation direction. The pressure rotator contacts an outer circumferential surface of the endless belt to form a nip therebetween, through which a heating target having a particular width in an axial direction of the pressure rotator is conveyed. A heater includes a heat generator that defines a conveyance span in the axial direction of the pressure rotator, where the heating target is conveyed, and a non-conveyance span in the axial direction of the pressure rotator, where the heating target is not conveyed. A non-conveyance span temperature detector is disposed opposite the pressure rotator in the non-conveyance span of the heat generator. The non-conveyance span temperature detector detects a temperature of the pressure rotator.

Abstract: A heating device includes an endless belt that rotates in a rotation direction and a pressure rotator that contacts an outer circumferential surface of the endless belt to form a nip between the endless belt and the pressure rotator. A heater sandwiches a lubricant together with the endless belt. The heater includes a heat generator that defines a conveyance span in a longitudinal direction of the heater, where a heating target having a predetermined width in the longitudinal direction of the heater is conveyed through the nip, and a non-conveyance span in the longitudinal direction of the heater, where the heating target is not conveyed. A non-conveyance span temperature detector is disposed opposite the endless belt in the non-conveyance span of the heat generator. The non-conveyance span temperature detector detects a temperature of the endless belt.