Abstract: When a toner image is continuously formed on a plurality of recording materials, and the toner image is fixed onto the recording materials, a conveyance control portion changes throughput, which is the number of recording materials to be conveyed per unit time, from first throughput to second throughput, which is slower than the first throughput, when a second detection temperature detected by a second temperature detecting portion that detects a temperature at an end of a heating member in a longitudinal direction of the heating member perpendicular to a conveyance direction of the recording materials exceeds a first threshold, and changes the throughput from the second throughput to third throughput, which is slower than the second throughput, when the second detection temperature exceeds a second threshold, which is higher than the first threshold, after the recording material conveyed at the second throughput reaches the nip.

Abstract: An apparatus and method for inspecting articles incorporating positive temperature coefficient resistors. The inspection apparatus includes a computing device, a power source, a housing, a support, and a thermal imager, each mounted within an interior volume of the housing. The inspection method includes receiving a first thermal image of the unpowered article mounted within the support and receiving a second thermal image of the powered article after an optimized time delay. The method further includes outputting a health indication of the positive temperature coefficient resistors based on a comparison of the first thermal image and the second thermal image.

Abstract: A fixing device includes a fixing unit, a temperature sensor, and a controller. The fixing unit includes a fixing member with which a medium on which a developer image is transferred comes into contact and a heat source that supplies heat to the fixing member. The temperature sensor measures temperature of a surface with which the medium comes into contact in the fixing member. The controller outputs information indicating an abnormality of temperature detection by the temperature sensor if an estimation value of temperature of the fixing member is larger than a predetermined reference value.

Abstract: According to one embodiment, an image forming apparatus includes a driving unit, a first determination unit, a second determination unit, and an output unit. The first determination unit is configured to determine whether or not a rotation abnormality relating to rotation of the driving unit occurs. The second determination unit is configured to determine whether or not a signal abnormality relating to a signal line of a current signal of the driving unit occurs based on a current value of the current signal after the first determination unit determines whether or not the rotation abnormality occurs. The output unit is configured to output a determination result of the second determination unit.

Abstract: An image forming apparatus is provided. The image forming apparatus includes a print engine to perform an image forming job, a motor to drive the print engine, a driving circuit, to supply a power to the motor, and including a sensor to sense an amount of current of the power supplied to the motor, and a processor to analyze a frequency component of the current supplied to the motor by using the amount of current sensed by the sensor for a predetermined time, and to determine an occurrence of a jam based on the analyzed frequency component.

Abstract: A jig determination method, a production base system, and an information processing system. The jig determination method executed by an information processing system for controlling production of an ordered product by printing includes acquiring correspondence information associating, for each image forming apparatus, a jig attached to the image forming apparatus and the image forming apparatus, determining a jig to be attached to an image forming apparatus on standby based on the correspondence information and a jig to be used in printing of an ordered product, and outputting information indicating a change of the jig attached to the image forming apparatus on standby based on a result of the determining.

Abstract: A fixing unit includes a first heater, a first switch, a second heater, and a second switch. In an image forming mode, a controller controls the first switch and the second switch to keep a temperature of the fixing unit at a fixing temperature serving as a target temperature for fixing the image on the sheet. In a standby mode, the controller controls the first and second switches to keep the temperature of the fixing unit at a standby temperature, and controls the first and second switches such that a period in which a first current is supplied to the first heater and a period in which a second current is supplied to the second heater do not overlap.

Abstract: An image forming apparatus includes a fixing device and a control unit. The fixing device includes a heating resistor formed of a positive temperature coefficient material. The control unit energizes the heating resistor with a first energization amount if a temperature of the heating resistor is lower than a predetermined temperature, and energizes the heating resistor with a second energization amount that is higher than the first energization amount if the temperature of the heating resistor is higher than the predetermined temperature.

Abstract: A device includes a rotator having a rotation axis, a belt, a nip forming member surrounded by the belt and configured to, with the rotator, pinch the belt to form a nip, an urging member configured to urge one of the rotator and the nip forming member towards the other in a particular direction perpendicular to the rotation axis, an upstream guide and a downstream guide. The upstream guide includes an upstream guide surface configured to guide an inner peripheral surface of the belt. The nip forming member includes a facing surface which faces the rotator. An upstream edge of the facing surface in the moving direction is located at a position farther from the rotation axis, in the particular direction, than a downstream edge of the upstream guide surface.

Abstract: The object of the present invention is to fix the thermoplastic ink in powder state used to print digital images by means of an electrographic laser motor on self-adhesive web media such as self-adhesive paper webs, self-adhesive film webs such as polypropylenes, polyethylenes, polyesters, and vinyls, with different thicknesses and finishes, allowing work to be stopped between one production batch and another and/or stops for self-calibration of the print motor without changing the self-adhesive media, preventing problems due to overheating of the printout. The apparatus according to the present invention makes it possible to enhance the fixed prints with a glossy, matt, or holographed finish, without the need for subsequent treatment and/or the use of chemical materials afterwards, offering greater flexibility and economy at work.

Abstract: An image forming apparatus includes a plurality of sheet storage receptacles configured to store a sheet. The image forming apparatus also includes a fixing device having a heating belt and a pressure roller configured to heat and fix toner on the sheet conveyed from one of the plurality of sheet storage receptacles. The image forming apparatus also includes a processor and a memory configured to store temperature information associated with each sheet storage receptacle and related to temperature control of the fixing device, acquire type information of a sheet to be printed, in response to a predetermined condition, specify the sheet storage receptacle storing the sheet to be printed, and perform a first heating control that controls a temperature of the fixing device based on the stored temperature information associated with the specified sheet storage receptacle.

Abstract: According to one embodiment, a temperature control device stores a fixing device temperature estimation value and a storage time obtained by WAE control in a memory at any time during operation. After an electric power supply to the temperature control device is stopped, the next time the electric power supply is started, an electric power supply stop period until the electric power supply is started is calculated. If the electric power supply stop period is shorter than a set time, the WAE control is started by using the stored fixing device temperature estimation value, and if the electric power supply stop period exceeds the set time, the WAE control is started based on an initial set value.

Abstract: An image reading apparatus includes a main body, a touch panel, a document transport path, a feed tray, a feed roller, a separation unit, a reader, a discharge roller, a discharge tray, and a mounting table. The mounting table is provided on an upper side of the main body and includes an upper surface. The mounting table is located at an outer face of the main body, the upper surface serves as a mounting surface on which the source document to be fed or the source document that has been read is mounted. The mounting surface is located at a position higher than an upstream end of the feed tray when the source document is mounted on the mounting surface.

Abstract: Provided is an image forming apparatus that reduces discomfort when returning from the energy saving mode. The image forming apparatus can switch between an energy saving mode and a normal mode that consumes more power than the energy saving mode as the operation mode. A human sensor can detect a person and calculate the distance to the person. An operation mode control unit raises the temperature of the fixing unit of the image forming unit when a person detected by the human sensor approaches within the first specific distance, and it start transport unit to be driven when the person approaches within a second specific distance, which is closer than the first specific distance.

Abstract: A printing system includes a first printer configured to execute an initial operation to transition to a printable state when receiving an activation instruction and a second printer configured to execute an initial operation to transition to a printable state when receiving an activation instruction. Activation instruction processing for outputting the activation instruction to the second printer is executed when the second printer is designated as a following printer to be activated subsequently to the first printer. In the activation instruction processing, the activation instruction is output to the second printer at second activation timing obtained based on, with timing at which the first printer receives the activation instruction as a starting point, a first initial operation time, a first maintenance time, and a second initial operation time.

Abstract: A load controller includes a control device, a switching device, an arc suppression circuit, and a control section. The control device is provided on an electric power supply path between first and second terminals coupled to an alternating-current electric power source, and controls electric power supply to a load provided on the electric power supply path. The switching device is provided on the electric power supply path and is to be in an open state or a closed state. The arc suppression circuit is to suppress discharge at the switching device. The arc suppression circuit is to be set to an enabled state or a limited state. The control section controls operation of the control device, the switching device, and the arc suppression circuit. The control section varies the arc suppression circuit from the limited state to the enabled state after bringing the switching device into the closed state.

Abstract: An fixing device comprises a heating member, a first heater, a second heater, and the heating member, a first temperature detector, a second temperature detector, and a controller configured to control energization to the first heater and the second heater based on an energization pattern for each control period. In a case where a length of the control period is T, a length of a period during which a first continuous energization control is T1, and a length of a period during which a second continuous energization control is T2, when a first condition represented by T1+T2<T is satisfied, the controller starts the second continuous energization control just after an end of the first continuous energization control.

Abstract: There is provided an image forming apparatus including: a body casing; a toner image forming section including an image carrier and a transferring section; a fixing section; a heater; a temperature sensor; and a controller. In a case that the temperature is higher than a predetermined threshold value, the controller controls the image carrier and the transferring section such that a conveying velocity of the print medium by the image carrier and the transferring section becomes a first conveying velocity. In a case that the temperature is lower than the predetermined threshold value, the controller controls the image carrier and the transferring section such that the conveying velocity of the print medium by the image carrier and the transferring section becomes a second conveying velocity slower than the first conveying velocity.

Abstract: A fixing device includes a fixing member, a heating element, a power supply circuit, and a processor. The fixing member is used in fixing on recording material. The heating element is used to heat the fixing member. The power supply circuit causes current in phase control to flow to the heating element. The processor is configured to set the phase of the current by using a combination of multiple phase control periods having different numbers of cycles supplied from an alternating-current power supply. The current flows to the heating element.

Abstract: An image forming apparatus forms a plurality of images of different colors on an intermediate transfer belt by a plurality of image forming portions. The image forming apparatus detects a color misregistration amount of the image formed on the intermediate transfer belt and performs image formation using a correction value based on the color misregistration amount. If an elapsed time from previous image formation is less than a predetermined time, the image forming apparatus predicts the correction value using the previous correction value and the temperature at that time and performs color misregistration correction. If the elapsed time from the previous image formation is a predetermined time or longer, the image forming apparatus predicts the correction value using the correction value and the temperature at the time when the elapsed time becomes a predetermined time or longer and performs the color misregistration correction.

Abstract: According to one embodiment, an image forming device includes a fixing device and a controller. The controller obtains an identifier for identifying a user. The controller controls the fixing device based on the obtained identifier, history information, and temperature information, to be a fixing temperature associated with usage status information associated with the obtained identifier. The history information is information obtained by associating the identifier and the usage status information. The usage status information is information including a printing ratio in previous image formation by a user. The temperature information is information obtained by associating the usage status information and the fixing temperature.

Abstract: An image forming apparatus includes a fixing unit and a control unit. The fixing unit includes a rotating endless belt, a rotary member, a heating member, a driving unit, and a separation member arranged facing a circumference of the endless belt and configured to separate the recording material, after passing through the nip portion, from the endless belt. The control unit is configured to control the driving unit such that the endless belt stops along with an end of a fixing processing and rotates when a temperature of the endless belt passes a glass transition temperature of the endless belt from higher than the glass transition temperature of the endless belt to lower than the glass transition temperature of the endless belt.

Abstract: An image forming apparatus of the present invention includes a circuit including both a circuit within a fixing unit and a power control circuit, provided with a first circuit which supplies power to a heater from an AC power supply, a second circuit electrically insulated from the first circuit, and a third circuit electrically insulated from both the first circuit and the second circuit, all of the first to third circuits are provided on at least one surface of a circuit board, and the first to third circuits are disposed on at least one straight line on which all of the first to third circuits are present on the one surface of the circuit board in the order of the first circuit, the third circuit and the second circuit.

Abstract: A fixing device for fixing a toner image formed on an image receiving medium to the image receiving medium includes a heating rotation member, a heating element that heats the heating rotation member, a pressure rotation member pressed to the heating rotation member and forming a nip therebetween through which the image receiving medium passes, a pressure control device that controls a pressure at which the pressure rotation member abuts against the heating rotation member. A control device controls the heating element and the pressure control device to alternately perform a process for heating the heating rotation member while the pressure rotation member abuts against the heating rotation member and a process for heating the heating rotation member while the pressure rotation member is separated from the heating rotation member.

Abstract: An object of the present disclosure is to perform discharge control that suppresses deterioration in power storage performance of a power storage component by taking the state of power supply equipment into consideration. A power supply apparatus comprises: a power storage unit that stores electric charges from an external power supply; a control unit that controls charge and discharge of the power storage unit; a state determination unit that determines the power supply state of the external power supply; and a voltage detection unit that detects the voltage at the power storage unit. The control unit performs first discharge control to lower the voltage at the power storage unit to a smaller second voltage value if a predetermined time elapses since the completion of drive of a drive unit and the state determination unit determines that the power supply state is not a state of restricting power to be supplied.

Abstract: A fixing device according to an embodiment includes an endless belt, a pressure element, a heating member, an adjustment mechanism, and a controller. The pressure element conveys and presses a sheet to the endless belt. The heating member is on the inner side of the belt and has a heat generating element for heating the belt. The adjustment mechanism moves the heating member or the pressure element to adjust the nip width between the heating member and the pressure element. The controller controls the adjustment mechanism so that A>B?N is satisfied, where A is the nip width during a fixing process in which a colored material is fixed to the sheet, B is the nip width during a heating process conducted before the fixing process, and N is the length of the heat generating element in the sheet conveyance direction.

Abstract: A fixing device of an image forming apparatus includes: a fixing belt, a heat source that heats a portion of the fixing belt; and a pressure roller that forms a nip between the pressure roller and the fixing belt and that transports a sheet. In the heat source, a standby temperature (setting temperature in a suspension standby mode) in a standby state in which rotation of the fixing belt is suspended is set to be higher than a printing temperature in a printing state.

Abstract: An image forming apparatus includes a heater to generate heat with AC power for fixing a toner image to a medium and a power supply device to supply the AC power to the heater according to a pattern corresponding to one of at least two different combinations of a control cycle and a resolution in duty ratio. The control cycle corresponds to an integer multiple of a nominal AC power cycle. The duty ratio reflects a number of nominal AC power cycles in the control cycle during which the heater is in an on state.

Abstract: An image forming apparatus includes an image forming portion, a fixing portion, a temperature detecting portion, a measuring portion, a storing portion, and a controller. The controller is capable of setting a case that a start of feeding of a recording material is permitted after a lapse of a predetermined time need to measure a temperature rising rate of the fixing portion and a case that the start of feeding of the recording material is permitted, depending on a value relating to the temperature rising rate stored in the storing portion, at timing before the lapse of the predetermined time.

Abstract: There is provided a fixing device, in which an operation delay of a safety element is unlikely to occur even if a heater tilts. The fixing device includes a spacer disposed between the heater and the safety element, wherein an area of the spacer in contact with the safety element is smaller than an area of the spacer in contact with the heater, and the spacer is tiltable relative to the safety element.

Abstract: A fixing device includes a contact portion that comes into contact with a recording material transported; a heat source that heats the contact portion and has a counter surface and an opposite surface, the counter surface facing the contact portion; a high-thermal-conductivity portion provided on the opposite surface of the heat source and extending in a width direction intersecting a transport direction of the recording material, the high-thermal-conductivity portion having a higher thermal conductivity than the contact portion; a low-thermal-conductivity portion provided between the opposite surface of the heat source and the high-thermal-conductivity portion and having a lower thermal conductivity than the high-thermal-conductivity portion; and a temperature detector that detects a temperature of the heat source and is provided on the opposite surface of the heat source and at a position shifted from the high-thermal-conductivity portion and the low-thermal-conductivity portion in the transport direction.

Abstract: A fixing device includes a belt member, an inner circumferential rotating body, an outer circumferential rotating body, and a rotation starter. The belt member has an inner circumferential surface and an outer circumferential surface and fixes an image formed on a recording medium. The inner circumferential surface of the belt member is looped over the inner circumferential rotating body. The inner circumferential rotating body rotates the belt member. The outer circumferential rotating body is movable between a contact position at which the outer circumferential rotating body is in contact with the outer circumferential surface of the belt member and a separated position at which the outer circumferential rotating body is separated from the outer circumferential surface of the belt member. The outer circumferential rotating body rotates the belt member when the outer circumferential rotating body is disposed at the contact position.

Abstract: An image forming apparatus includes an authentication section configured to execute an authentication process on a replacement part; and a controller configured to skip the authentication process when determining that a stop period from the start of operation stop to the end or the operation stop is equal to or shorter than a predetermined period of time, and to execute the authentication process when determining that the stop period exceeds the predetermined period of time.

Abstract: An image formation device includes a power controller that controls transition to an energy-saving mode to reduce power consumption in a standby state and starts up out of the energy-saving mode and a timer in which a timing schedule that starts up the device out of the energy-saving mode is set. The power controller controls the surface temperature of the fixing roller of the image generator to be a temperature lower than the fixing temperature that enables image formation when the image formation device is started up out of the energy-saving mode according to the timing schedule set in the timer.

Abstract: According to embodiments, an image forming apparatus includes a fixation member, a pressurization member, a heat source, a drive unit, a measurement unit, and a control unit. The measurement unit measures the time that elapses after the image forming apparatus ends image forming processing until the image forming apparatus receives an instruction to perform the next image forming processing. If the elapsed time does not exceed a predetermined threshold, the control unit causes the drive unit to start to drive the fixation member after a temperature of the fixation member reaches a first control temperature. If the elapsed time exceeds the predetermined threshold, the control unit causes the drive unit to start to drive the fixation member after the temperature of the fixation member reaches a second control temperature that is higher than the first control temperature.

Abstract: A fuser assembly includes a heated member and a backup member defining a fusing nip. Toner fuses to media in the nip at a fusing temperature and process speed during an imaging operation. Upon receipt of a command to commence imaging, a controller operates a heater to heat the fuser assembly to a first temperature less than the fusing temperature and operates a motor to rotate the fuser assembly at a speed lower than the process speed to prevent overheating the heated and backup members. Before a first media reaches the fusing nip, a speed of the motor is increased to the process speed to properly advance the media through the nip at the process speed. Upon the first media arriving at the fusing nip, the controller increases the temperature of the heater to a second temperature greater than the first temperature to prevent cold offset.

Abstract: A toner is provided. The toner comprises a glittering pigment and a coloring pigment. The glittering pigment is disposed inside the toner. The coloring pigment comprises a yellow pigment comprising an isoindoline pigment.

Abstract: A fixing device includes a lateral end heater, disposed opposite a lateral end of an inner circumferential surface of a fixing rotator in an axial direction thereof, to heat the fixing rotator and a thermal conduction aid contacting the fixing rotator and the lateral end heater to conduct heat. The lateral end heater includes a power supply portion disposed outboard from a lateral end of the thermal conduction aid in a longitudinal direction thereof and disposed opposite the inner circumferential surface of the fixing rotator. The power supply portion includes an electrode. A cover covers the power supply portion and includes a cover face disposed opposite the inner circumferential surface of the fixing rotator. A height adjuster adjusts a height of the cover face of the cover and causes the cover face to define an identical plane with a fixing rotator side face of the thermal conduction aid.

Abstract: An image forming apparatus includes an image forming unit, a fixing unit having a heating member for generating heat based on power supplied, a detection unit, and a controller. The image forming unit forms an image on a sheet. The fixing unit fixes the image on the sheet by the heat of the heating member. The detection unit detects a temperature of the heating member. The controller controls power to be supplied to the heating member based on a temperature detected by the detection unit. The controller determines a difference value between the temperature detected by the detection unit and a target temperature, determines an accumulated value by performing accumulation processing of the difference value, and controls the power based on the difference value and the accumulated value. The controller controls the accumulation processing based on the difference value and the accumulated value.

Abstract: A fixing device includes a cylindrical film having an inner surface and a plate-like heater that extends in a longitudinal direction of the film, with the heater having (i) a first surface that contacts the inner surface of the film, and (ii) a second surface opposite to the first surface. The fixing device further includes a heat conduction plate that extends in the longitudinal direction of the film and contacts the second surface of the heater, and a supporting member that supports the heater through the heat conduction plate. An image that is formed on a recording material is heated by heat from the heater through the film.

Abstract: A fixing device includes a fixing member, a pressuring member and a temperature sensing part. The fixing member heated by a heat source contacts with a recording medium to heat a toner image on the recording medium. The pressuring member pressures the recording medium to the fixing member. The temperature sensing part in non-contact with the fixing member includes an infrared sensing element sensing infrared rays from the fixing member and a condensing member condensing the infrared rays to the infrared sensing element. Detection temperature of the fixing member is calculated with a sensing value by the infrared sensing element. The detection temperature or control temperature of the heat source is corrected with temperature deference between the infrared sensing element and the condensing member. Heating of the fixing member is controlled with the corrected detection temperature and the control temperature or the detection temperature and the corrected control temperature.

Abstract: An image heating apparatus includes an endless belt and a rotatable member configured to form a nip for heating a toner image on a recording material therebetween, a substantially stationary pad member and a movable pad member provided along a feeding direction of the recording material and configured to press the endless belt toward the rotatable member from an inside of the endless belt, a moving mechanism configured to move the movable pad member between a first position at which the movable pad member presses the endless belt toward the rotatable member and a second position at which the movable pad member does not press the endless belt toward the rotatable member, and a sheet-like member configured to cover such a surface of the stationary pad member as is opposite to the rotatable member and such a surface of the movable pad member as is opposite to the rotatable member.

Abstract: An image formation device includes a power controller that controls transition to an energy-saving mode to reduce power consumption in a standby state and starts up out of the energy-saving mode and a timer in which a timing schedule that starts up the device out of the energy-saving mode is set. The power controller controls the surface temperature of the fixing roller of the image generator to be a temperature lower than the fixing temperature that enables image formation when the image formation device is started up out of the energy-saving mode according to the timing schedule set in the timer.

Abstract: A fixing device includes a first pressure structure, a second pressure structure, a fixing member, a first arm, a second arm, and an elastic member. The fixing member is disposed between the first and second pressure structures. The first arm is pivotable about a first shaft and includes a first pressing portion and a first connection portion. The second arm is pivotable about a second shaft and includes a second pressing portion and a second connection portion. The elastic member biases the first and second pressing portions toward each other. A first leverage ratio of a distance between the first shaft and the first connection portion to a distance between the first shaft and the first pressing portion is different from a second leverage ratio of a distance between the second shaft and the second connection portion to a distance between the second shaft and the second pressing portion.

Abstract: An image forming apparatus includes: a fusing unit that heats a toner image and fixes the toner image on a recording medium; an exhaust passage that allows air heated by the fusing unit to flow and discharges the air to an outside of the apparatus; a delivery unit that moves the air in the exhaust passage in a discharge direction; a target structural component to which the air is to be delivered; a ventilation passage that connects a portion on a downstream side of the delivery unit of the exhaust passage in the discharge direction and the target structural component, and that allows the air to flow; and an adjuster that adjusts a passage through which the air flows, at a branch point between the exhaust passage and the ventilation passage.

Abstract: An image formation device includes a power controller that controls transition to an energy-saving mode to reduce power consumption in a standby state and starts up out of the energy-saving mode and a timer in which a timing schedule that starts up the device out of the energy-saving mode is set. The power controller controls the surface temperature of the fixing roller of the image generator to be a temperature lower than the fixing temperature that enables image formation when the image formation device is started up out of the energy-saving mode according to the timing schedule set in the timer.

Abstract: There is provided an image forming apparatus including a fixing unit in which fixing temperature is calculated from a toner bearing amount and fixing processing is performed while reducing drop in the print speed. A method for controlling a temperature of a fixing unit for fixing a recording material onto a recording medium includes determining, for image data of a plurality of pages, whether a data size of the image data of a unit page is smaller than or equal to a predetermined threshold, and based on the determination result, selecting whether to control the temperature of the fixing unit to be a temperature determined from the amount of the recording material of the image data of the unit page, or to control the temperature of the fixing unit to be a predetermined temperature.

Abstract: An image forming apparatus communicable with an external apparatus includes a reception unit configured to receive from the external apparatus a request for displaying a frame used to operate the image forming apparatus on a display of the external apparatus, an execution unit configured to perform shut down processing of the image forming apparatus when a predetermined time has elapsed, and a control unit configured to prevent the execution unit from performing the shut down processing in a case where the reception unit has received the request before the predetermined time has elapsed.

Abstract: Methods, devices, and integrated circuits are disclosed for controlling switch timing in a power factor correction timing switch. In one example, a device is configured to receive one or more indications of one or more power factor correction circuit parameters. The device is further configured to determine a switch delay time based at least in part on the one or more power factor correction circuit parameters. The device is further configured to generate an indication of a switch on time for the power factor correction timing switch, wherein the switch on time is based at least in part on the switch delay time.

Abstract: A fixing device includes a rotatable fuser member, a rotatable pressure member, a heater, and a controller. The rotatable fuser member is subjected to heating. The rotatable pressure member is disposed opposite the fuser member. The pressure member presses against the fuser member to form a fixing nip therebetween, through which multiple recording media, each spaced apart from each other by an interval distance in a conveyance direction, are sequentially conveyed at a conveyance speed. The heater is disposed adjacent to the fuser member to heat the fuser member. The controller is operatively connected to the heater to control power supply to the heater through a series of on-off switching control cycles, each including an on-time during which the heater power supply is on, and an off-time during which the heater power supply is off, in synchronization with conveyance of the recording medium.