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公开(公告)号：US20220091558A1
公开(公告)日：2022-03-24
申请号：US17480154
申请日：2021-09-21
申请人： Kei SAITO , Tomoya ADACHI , Yuusuke FURUICHI
发明人： Kei SAITO , Tomoya ADACHI , Yuusuke FURUICHI
IPC分类号： G03G21/20
摘要： An image forming apparatus includes a heating device including a heater, a developing device, and an airflow generation device. The heater includes a base, a heat generator, an electrode portion, and conductive portions. The conductive portions are disposed on one side and another side in a longitudinal direction in a heat generation region and spaced apart in a lateral direction intersecting the longitudinal direction. A maximum total value among total values of squares of current flowing in the conductive portions at longitudinal positions on the one side is larger than that on said another side. The developing device includes a rotating member and sliding portions. A sliding portion having highest temperature in operation is disposed on one side of the developing device being same as the one side of the heater in the longitudinal direction. The airflow generation device generates an airflow toward the one side of the developing device.
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公开(公告)号：US20200249604A1
公开(公告)日：2020-08-06
申请号：US16736995
申请日：2020-01-08
IPC分类号： G03G15/20
摘要： 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.
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公开(公告)号：US20200249602A1
公开(公告)日：2020-08-06
申请号：US16715348
申请日：2019-12-16
申请人： Daisuke Inoue , Tomoya ADACHI , Yuusuke FURUICHI
发明人： Daisuke Inoue , Tomoya ADACHI , Yuusuke FURUICHI
摘要： 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.
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公开(公告)号：US20190278206A1
公开(公告)日：2019-09-12
申请号：US16269616
申请日：2019-02-07
摘要： A heater includes a plurality of resistive heat generators electrically connected to each other in parallel. A power supply supplies power to the resistive heat generators. An electric current detector detects an electric current that flows through the resistive heat generators. A voltage detector detects a voltage applied to the resistive heat generators. An electric current controller controls the electric current that flows through the resistive heat generators based on the electric current detected by the electric current detector and the voltage detected by the voltage detector. The electric current detector detects the electric current in a state in which, after the power supply starts supplying the power to the resistive heat generators, an identical waveform of an alternating current supplied to the resistive heat generators continues for a predetermined time period or longer taken for the electric current detector to detect the electric current.
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公开(公告)号：US20220283531A1
公开(公告)日：2022-09-08
申请号：US17571836
申请日：2022-01-10
申请人： Naohiro KUMAGAI , Tomoya ADACHI , Yuusuke FURUICHI
发明人： Naohiro KUMAGAI , Tomoya ADACHI , Yuusuke FURUICHI
IPC分类号： G03G15/20
摘要： An image forming apparatus includes a heating device, a rotator, and a blade. The heating device includes a heater extending in a direction orthogonal to a conveyance direction of a recording medium. The heater includes a heat generator and generates a larger heat amount at one end than at a center. The blade includes a rubbing portion extending in the direction. Both ends of the rubbing portion face both ends of the heater. The rotator and the blade are configured such that a friction force between the rotator and one end of the rubbing portion is smaller than a friction force between the rotator and the center of the rubbing portion in the direction.
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公开(公告)号：US20200379384A1
公开(公告)日：2020-12-03
申请号：US16829083
申请日：2020-03-25
IPC分类号： G03G15/20
摘要： A heating device includes a sleeve-shaped flexible fixing rotator, a heater to contact an inner surface of the fixing rotator, a pressure rotator pressed against the heater via the fixing rotator to form a nip between the fixing rotator and the pressure rotator, a thermometer to detect a temperature of the heater, and a pressing force switching mechanism to switch a pressing force between the heater and the pressure rotator. The pressing force switching mechanism switches the pressing force between the heater and the pressure rotator in at least two stages, a standard force when the temperature of the heater detected by the thermometer increases and reaches a predetermined temperature and before the medium to be heated passes through the nip, and a reduced force smaller than the standard force when the temperature of the heater detected by the thermometer is lower than the predetermined temperature.
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公开(公告)号：US20190286028A1
公开(公告)日：2019-09-19
申请号：US16285733
申请日：2019-02-26
IPC分类号： G03G15/20
摘要： 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.
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公开(公告)号：US20190196374A1
公开(公告)日：2019-06-27
申请号：US16232246
申请日：2018-12-26
IPC分类号： G03G15/20
摘要： 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. The control circuitry controls the circuit such that a temperature of each resistance heating element becomes a predetermined temperature, based on a result of detection of the first detector, and interrupts the power supplied to the resistance heating elements when the second detector detects predetermined temperature information regarding the second resistance heating element.
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公开(公告)号：US20190179242A1
公开(公告)日：2019-06-13
申请号：US16212817
申请日：2018-12-07
申请人： Tomoya ADACHI , Yuusuke FURUICHI
发明人： Tomoya ADACHI , Yuusuke FURUICHI
摘要： A heating device includes a base, a plurality of resistance heating elements, a power control circuit, a first temperature sensor, a second temperature sensor, and control circuitry. The resistance heating elements is disposed in a longitudinal direction of the base and electrically connected in parallel with each other. The power control circuit is configured to supply electrical power to the resistance heating elements. The control circuitry is configured to control an electrical power amount of the power control circuit so that temperatures of the resistance heating elements become equal to a first predetermined temperature based on a result of sensing with a first temperature sensor of the resistance heating elements and cut off the electrical power supplied from the power control circuit to the resistance heating elements in response to sensing of a second predetermined temperature with a second temperature sensor of the resistance heating elements.
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公开(公告)号：US20210364958A1
公开(公告)日：2021-11-25
申请号：US17241233
申请日：2021-04-27
摘要： A heating device includes a heater and a feeding member. The heater includes a base and an electrode mounted on an electrode mounting face of the base. The feeding member includes a connector terminal and a restrictor. The connector terminal contacts the electrode. The restrictor engages the heater and restricts displacement of the feeding member relative to the heater.
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