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公开(公告)号：US11960224B2
公开(公告)日：2024-04-16
申请号：US18170082
申请日：2023-02-16
发明人： Akiyoshi Shinagawa , Yasuharu Toratani , Hiroshi Miyamoto , Daigo Matsuura , Hiroki Kawai , Ayano Ogata , Masanobu Tanaka , Asuna Fukamachi , Misa Kawashima
CPC分类号： G03G15/2028 , G03G15/2017 , G03G15/2053 , G03G15/2057 , G03G15/206 , G03G15/2064 , G03G21/1685 , G03G2215/2003 , G03G2215/2016 , G03G2215/2019 , G03G2215/2035 , G03G2215/2048 , G03G2215/2051 , G03G2215/2054
摘要： A fixing device includes an endless belt, a rotatable pressing member, a pad member inside of the belt, and a sliding member held by the pad member and sliding on an inner circumferential surface of the belt in a nip. The rotatable pressing member nips and feeds a recording material in the nip in cooperation with the belt and fixes a toner image on the recording material by applying heat and pressure. The sliding member includes a base material layer on which a plurality of projections projecting toward the rotatable pressing member are formed on a side sliding with the belt and a sliding layer provided on an outer surface of the plurality of projections. A leading end of the plurality of projections is a plane and an average roughness (Ra) of the plane satisfies 0.13 μm≤Ra≤1.67 μm.
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公开(公告)号：US11300904B2
公开(公告)日：2022-04-12
申请号：US17330619
申请日：2021-05-26
发明人： Hiroki Kawai , Mitsuru Hasegawa , Ayano Ogata , Yasuharu Toratani
IPC分类号： G03G15/20
摘要： A fixing apparatus includes a heating roller including a plurality of halogen heaters whose number is three or more and a driving-force transmission member disposed on one end portion of the heating roller and configured to transmit rotational force that rotates the heating roller. The plurality of halogen heaters whose number is three or more includes at least one asymmetric halogen heater in which an amount of heat generated from one end side on which the driving-force transmission member is provided is larger than an amount of heat generated from another end side, and in which heat generation distribution is asymmetric with respect to a center of a heat generating portion in a longitudinal direction, and at least one symmetric halogen heater in which heat generation distribution is symmetric with respect to a center of a heat generating portion in a longitudinal direction, and the number of symmetric halogen heaters is larger than the number of asymmetric halogen heaters.
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13.发明授权公开(公告)号：US11269272B2
公开(公告)日：2022-03-08
申请号：US17094077
申请日：2020-11-10
发明人： Hidekazu Tatezawa , Youichi Chikugo , Rikiya Takemasa , Kenichi Tanaka , Yutaro Tsuno , Mitsuru Hasegawa , Suguru Takeuchi , Hiroki Kawai , Yasuharu Toratani , Ayano Ogata
IPC分类号： G03G15/20
摘要： A fixing device includes a rotatable fixing belt, a pad, a rotatable pressing member, a pressing member driving source, an auxiliary driving roller, and a transmission mechanism for transmitting a driving force from the pressing member driving source to the auxiliary driving roller, wherein a peripheral speed of the auxiliary driving roller is faster than a peripheral speed of the pressing member, and a steering roller provided so as to stretch the fixing belt at the inner surface of the fixing belt in a position downstream of the auxiliary driving roller and upstream the pad with respect to a rotational direction of the fixing belt. The steering roller adjusts a position of the fixing belt with respect to a widthwise direction of the fixing belt by inclining the fixing belt so as to be positioned within a predetermined range.
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公开(公告)号：US20210373468A1
公开(公告)日：2021-12-02
申请号：US17330619
申请日：2021-05-26
发明人： Hiroki Kawai , Mitsuru Hasegawa , Ayano Ogata , Yasuharu Toratani
IPC分类号： G03G15/20
摘要： A fixing apparatus includes a heating roller including a plurality of halogen heaters whose number is three or more, a driving-force transmission member disposed on one end portion of the heating roller and configured to transmit rotational force that rotates the heating roller. The plurality of halogen heaters whose number is three or more includes a halogen heater in which an amount of heat generated from one end side on which the driving-force transmission member is provided is larger than an amount of heat generated from another end side, and in which heat generation distribution is asymmetric with respect to a center of a heat generating portion in a longitudinal direction, and a halogen heater in which heat generation distribution is symmetric with respect to a center of a heat generating portion in a longitudinal direction, and the symmetric halogen heater is larger in number than the asymmetric halogen heater.
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公开(公告)号：US20200310309A1
公开(公告)日：2020-10-01
申请号：US16822416
申请日：2020-03-18
发明人： Hiroki Kawai , Mitsuru Hasegawa , Suguru Takeuchi
IPC分类号： G03G15/20
摘要： 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.
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公开(公告)号：US20200041940A1
公开(公告)日：2020-02-06
申请号：US16526463
申请日：2019-07-30
IPC分类号： G03G15/20
摘要： An image fixing device includes a rotatable fixing belt; a pressing roller forming a nip for feeding a sheet; a nip forming member contacted to an inner surface of the fixing belt to sandwich the fixing belt between the pressing roller to form the nip; a heating roller stretching the fixing belt; a cooling fan, for cooling the fixing belt, provided opposed to the belt at a position downstream of the heating roller and upstream of the nip forming member in the rotational movement direction of the fixing belt; a temperature sensor, for detecting a temperature of the fixing belt, provided at the position downstream of the cooling fan and upstream of the nip; and a controller for controlling power supply to the heater on the basis of an output of the temperature sensor.
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公开(公告)号：US20180348681A1
公开(公告)日：2018-12-06
申请号：US15988454
申请日：2018-05-24
发明人： Yusuke Yamaguchi , Masayuki Tamaki , Hiroki Kawai , Ikuo Nakamoto
CPC分类号： G03G15/2039 , G03G15/2053 , G03G15/5004
摘要： An image heating apparatus includes an endless belt, a rotatable member, a heater, a temperature detecting portion, and a controller configured to control a temperature, at which energization to the heater is turned off, depending on a temperature rise rate per unit time of a detection temperature of the temperature detecting portion. When the temperature rise rate is a first rise rate, the controller turns off the energization to the heater in response to that the detection temperature reaches a first temperature. When the temperature rise rate is a second rise rate lower than the first rise rate, the controller turns off the energization to the heater in response to that the detection temperature reaches a second temperature higher than the first temperature.
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公开(公告)号：US09977385B2
公开(公告)日：2018-05-22
申请号：US15264970
申请日：2016-09-14
发明人： Shusuke Miura , Hiroki Kawai
CPC分类号： G03G15/5029 , G03G15/2042 , G03G15/2053 , G03G2215/00734 , G03G2215/2035
摘要： An image forming apparatus includes a fixing film for fixing a toner image formed on a recording material, and first and second fixing heaters configured to heat the fixing film. The first fixing heater has a high heat generation region at a center portion in a width direction of a fixing nip portion and the second fixing heater has a high heat generation region at an end portion in the width direction of the fixing nip portion. A center portion temperature detection unit detects a center portion temperature of a center portion of the fixing film in the width direction. An end portion temperature detection unit detects an end portion temperature of an end portion of the fixing film in the width direction. A size detection unit detects a size of the recording material. A control unit controls a heat generation amount of the fixing heaters.
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公开(公告)号：US11294313B2
公开(公告)日：2022-04-05
申请号：US17215907
申请日：2021-03-29
发明人： Mitsuru Hasegawa , Hiroki Kawai , Yasuharu Toratani , Ayano Ogata
IPC分类号： G03G15/20
摘要： An image forming apparatus includes a heater, heating roller heated by the heater and a fixing belt heated by the heating roller. A thermistor detects a temperature of the fixing belt at an area where the belt is stretched by the heating roller. When a CPU receives a signal which instructs the stop of rotation of the fixing belt, the CPU continues rotation of the fixing belt until the detected temperature detected by the thermistor decreases a predetermined temperature in a case in which the detected temperature is higher than the predetermined temperature.
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公开(公告)号：US11281141B2
公开(公告)日：2022-03-22
申请号：US17323365
申请日：2021-05-18
发明人： Yasuharu Toratani , Mitsuru Hasegawa , Hiroki Kawai , Ayano Ogata
IPC分类号： G03G15/20
摘要： An image forming apparatus includes an endless rotatable belt, a rotary pressing member, a pressing member, a driving unit, a heating roller, a temperature detection member, and a control unit. The rotary pressing member is configured to form a nip portion between the rotary pressing member and the belt, the nip portion being a portion in which a toner image borne by a recording material is fixed to the recording material while the recording material is nipped and conveyed. The control unit is configured to control the driving unit such that the driving unit does not start to rotate the belt during a period of time for a preparatory operation if a temperature of the heating roller is higher than a predetermined temperature, wherein the preparatory operation is an operation performed for enabling image formation after an error or a jam is handled.
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