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公开(公告)号：US12092976B2
公开(公告)日：2024-09-17
申请号：US18159596
申请日：2023-01-25
Applicant: Toshiba Tec Kabushiki Kaisha
Inventor： Hiroshi Ota
CPC classification number: G03G15/205 , G03G15/2042 , G03G15/55 , H05B3/0066 , H05B47/28
Abstract: According to one embodiment, a fixing device includes a fixing member, a temperature sensor unit, a heater unit, and a controller. The fixing member has a surface that contacts a sheet. The temperature sensor unit is configured to measure a temperature of the surface of the fixing member. The heater unit is configured to heat the member when turned ON. The controller is configured to output a notification indicating an abnormality in the temperature measurement by the temperature sensor unit if an ON time of the heater unit during an operation period for controlling the fixing member to be at a target temperature, as measured by the temperature sensor unit, is longer than a predetermined threshold time.
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公开(公告)号：US11880151B1
公开(公告)日：2024-01-23
申请号：US17944097
申请日：2022-09-13
Applicant: TOSHIBA TEC KABUSHIKI KAISHA
Inventor： Masaya Tanaka , Hiroshi Ota
IPC: G03G15/20
CPC classification number: G03G15/2039 , G03G15/2053
Abstract: An image forming apparatus has an image forming unit to form a toner image on a first sheet and a fixing unit configured to heat the first sheet to fix the image to the first sheet. A control unit begins a cooling process for cooling the fixing unit when an overheating condition is met, then permits the image forming unit to form a toner image on a second sheet after the cooling process ends according to a first cooling condition if a person is detected near the image forming apparatus or after the cooling process ends according to a second cooling condition if a person not detected near the image forming apparatus. The cooling process under the first cooling condition ends in less time than under the second cooling condition.
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3.发明授权公开(公告)号：US11782367B1
公开(公告)日：2023-10-10
申请号：US17895964
申请日：2022-08-25
Applicant: TOSHIBA TEC KABUSHIKI KAISHA
Inventor： Hiroshi Ota
CPC classification number: G03G15/2039 , G03G15/2064 , G03G15/5004 , G03G2215/2038
Abstract: According to one embodiment, an image forming apparatus includes a fixer including a rotating body and a heating member to heat the rotating body. A temperature sensor is positioned to detect a temperature of the rotating body and output a temperature detection result. A heating control circuit is configured to estimate the temperature of the rotating body based on the temperature detection result, a power supply voltage value, an energization pulse setting for controlling the heating member, a heat capacity of the fixer, and a heat resistance of the fixer. The control circuit generates an energization pulse for controlling power supplied to the heating member based on the estimated temperature and the temperature detection result. A controller detects a variation in the heat capacity of the fixer device and supplies a correction amount for the heat capacity corresponding to the detected variation to the heating control circuit.
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公开(公告)号：US20150063852A1
公开(公告)日：2015-03-05
申请号：US14445350
申请日：2014-07-29
Applicant: KABUSHIKI KAISHA TOSHIBA , TOSHIBA TEC KABUSHIKI KAISHA
Inventor： Hiroshi Ota
IPC: G03G15/20
CPC classification number: G03G15/2039
Abstract: An image forming apparatus includes an image forming unit configured to form a toner image on a recording medium, a heating unit and a pressurizing unit provided in a fixing unit, a first heater, a second heater, and a control unit configured to alternately repeat a heating state and a non-heating state for the respective heaters and heat the heating unit. The control unit alternately subjects the first and second heaters to heating control such that any one of the first and second heaters is in the heated state, if a predetermined condition holds, sets a heating time of at least one heater shorter than a heating time during the alternate heating control and controls the first and second heaters such that any one of the first and second heaters is in the heating state or both of the first and second heaters are in the non-heating state.
Abstract translation: 图像形成装置包括被配置为在记录介质上形成调色剂图像的图像形成单元，设置在定影单元中的加热单元和加压单元，第一加热器，第二加热器和控制单元， 加热状态和不加热状态，并加热加热单元。 控制单元交替地使第一和第二加热器进行加热控制，使得第一和第二加热器中的任何一个处于加热状态，如果预定条件成立，则将至少一个加热器的加热时间设定为比加热时间短 交替加热控制并控制第一和第二加热器，使得第一和第二加热器中的任一个处于加热状态，或者第一和第二加热器中的任一个处于非加热状态。
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公开(公告)号：US12130570B2
公开(公告)日：2024-10-29
申请号：US18174465
申请日：2023-02-24
Applicant: Toshiba Tec Kabushiki Kaisha
Inventor： Hiroshi Ota
IPC: G03G15/20
CPC classification number: G03G15/2039
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.
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Patent Agency Ranking
公开(公告)号：US12216420B2
公开(公告)日：2025-02-04
申请号：US18531216
申请日：2023-12-06
Applicant: Toshiba Tec Kabushiki Kaisha
Inventor： Masaya Tanaka , Hiroshi Ota
IPC: G03G15/20
Abstract: An image forming apparatus has an image forming unit to form a toner image on a first sheet and a fixing unit configured to heat the first sheet to fix the image to the first sheet. A control unit begins a cooling process for cooling the fixing unit when an overheating condition is met, then permits the image forming unit to form a toner image on a second sheet after the cooling process ends according to a first cooling condition if a person is detected near the image forming apparatus or after the cooling process ends according to a second cooling condition if a person not detected near the image forming apparatus. The cooling process under the first cooling condition ends in less time than under the second cooling condition.
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公开(公告)号：US11003117B1
公开(公告)日：2021-05-11
申请号：US16993131
申请日：2020-08-13
Applicant: TOSHIBA TEC KABUSHIKI KAISHA
Inventor： Hiroshi Ota
Abstract: A temperature control device controls a temperature of a temperature control target to which heat is propagated from a heater by supplying power to the heater. The temperature control device includes processing circuitry that acquires a temperature measurement result of the temperature control target from a temperature sensor. The processing circuitry estimates an input voltage being supplied to the heater based on an energization time of the heater and a change in the temperature of the temperature control target during the energization time. The processing circuitry generates a temperature estimation result by estimating the temperature of the temperature control target based on a previous energization pulse used to control energization of the heater and the input voltage. The processing circuitry outputs the energization pulse to control the power supplied to the heater based on the temperature estimation result and the temperature measurement result.
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公开(公告)号：US11754958B2
公开(公告)日：2023-09-12
申请号：US17570399
申请日：2022-01-07
Applicant: TOSHIBA TEC KABUSHIKI KAISHA
Inventor： Hiroshi Ota
CPC classification number: G03G15/5075 , G03G15/2039
Abstract: An image forming apparatus includes a heating member energization control circuit that estimates a temperature of a fixing rotating body, based on a temperature detection result of the fixing rotating body, which is heated by a heating member and heats a toner image formed on a medium to fix the toner image on the medium, by a temperature sensor, a power supply voltage of a power supply source, and an energization pulse for controlling energization to the heating member, and outputs an energization pulse for controlling power to be supplied to the heating member, based on the estimated temperature and the temperature detection result. The apparatus further includes a controller that acquires a power supply voltage detection result by a communication interface via a network, from another apparatus which holds a power supply voltage detection result by an image forming apparatus with a power supply voltage detection function, provided with a power supply voltage detection circuit that detects a power supply voltage value of a same power supply source as the power supply source, and inputs the acquired power supply voltage detection result to the heating member energization control circuit, as a power supply voltage value of the power supply source.
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公开(公告)号：US11733625B2
公开(公告)日：2023-08-22
申请号：US17571187
申请日：2022-01-07
Applicant: TOSHIBA TEC KABUSHIKI KAISHA
Inventor： Hiroshi Ota
CPC classification number: G03G15/2039 , G03G15/2064 , G06K15/12 , G06K15/1809
Abstract: According to an embodiment, an image forming apparatus measures a temperature of a pressing member and controls heat generation of a heater such that the measured temperature approaches a control temperature. Further, the image forming apparatus sets, before starting image formation of one job including image formation, one candidate temperature of a plurality of predetermined candidate temperatures different from each other as the control temperature on the basis of the number of sheets to be used and a sheet size to be used in the image formation of the one job.
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公开(公告)号：US20230221669A1
公开(公告)日：2023-07-13
申请号：US17570399
申请日：2022-01-07
Applicant: TOSHIBA TEC KABUSHIKI KAISHA
Inventor： Hiroshi Ota
CPC classification number: H04N1/00899 , G03G15/2039 , H04N1/0097 , H04N1/00347 , H04N1/00904
Abstract: An image forming apparatus includes a heating member energization control circuit that estimates a temperature of a fixing rotating body, based on a temperature detection result of the fixing rotating body, which is heated by a heating member and heats a toner image formed on a medium to fix the toner image on the medium, by a temperature sensor, a power supply voltage of a power supply source, and an energization pulse for controlling energization to the heating member, and outputs an energization pulse for controlling power to be supplied to the heating member, based on the estimated temperature and the temperature detection result. The apparatus further includes a controller that acquires a power supply voltage detection result by a communication interface via a network, from another apparatus which holds a power supply voltage detection result by an image forming apparatus with a power supply voltage detection function, provided with a power supply voltage detection circuit that detects a power supply voltage value of a same power supply source as the power supply source, and inputs the acquired power supply voltage detection result to the heating member energization control circuit, as a power supply voltage value of the power supply source.
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