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公开(公告)号：US20240361715A1
公开(公告)日：2024-10-31
申请号：US18645389
申请日：2024-04-25
IPC分类号： G03G15/20
CPC分类号： G03G15/2053 , G03G15/2064 , G03G2215/2035
摘要： A heating device includes a first rotator, a second rotator, a heater, a nip formation pad, a reflector, and a shield. The second rotator faces the first rotator. The heater heats the first rotator. The nip formation pad is inside a loop of the first rotator to form a nip between the first rotator and the second rotator. The nip formation pad has a nip side face facing an inner circumferential surface of the first rotator. The reflector reflects radiant heat radiated from the heater toward the inner circumferential surface of the first rotator. The reflector contacts the nip side face of the nip formation pad. The shield contacts the reflector and shields the first rotator from the radiant heat radiated from the heater.
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公开(公告)号：US20240176265A1
公开(公告)日：2024-05-30
申请号：US18523956
申请日：2023-11-30
IPC分类号： G03G15/20
CPC分类号： G03G15/2007 , G03G15/2064
摘要： A fixing device includes a fixing rotator, a pressure rotator, a fixing nip support, a heat source, and a reflector. The pressure rotator contacts an outer face of the fixing rotator to form a nip through which a recording medium conveyed in a conveyance direction passes. The fixing nip support has a receiving portion to receive a pressing force of the pressure rotator. The heat source inside a loop of the fixing rotator has a heat generation area having a first length in a width direction orthogonal to the conveyance direction. The reflector includes a contacting portion contacting the receiving portion of the fixing nip support and a reflecting portion facing the heat source to reflect radiant heat radiated by the heat source toward an inner face of the fixing rotator. The reflecting portion has a second length in the width direction longer than the first length.
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公开(公告)号：US11662678B2
公开(公告)日：2023-05-30
申请号：US17534456
申请日：2021-11-24
CPC分类号： G03G15/2053 , G03G15/205 , G03G15/2042 , G03G15/2064 , G03G15/5045 , G03G2215/2038
摘要： A fixing device includes a fixing rotator over which a recording medium bearing an image is conveyed. A first heater heats the fixing rotator and generates heat evenly in a maximum conveyance span where the recording medium having a maximum width in a width direction of the recording medium is conveyed. The maximum width is available for the fixing rotator. A second heater heats the fixing rotator and generates heat in the maximum conveyance span. The second heater includes a first portion that generates heat in a first heat generation amount and a second portion that generates heat in a second heat generation amount that is greater than the first heat generation amount of the first portion.
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公开(公告)号：US10895834B2
公开(公告)日：2021-01-19
申请号：US16794976
申请日：2020-02-19
申请人： Ryohei Matsuda , Hiroyuki Shimada
发明人： Ryohei Matsuda , Hiroyuki Shimada
IPC分类号： G03G15/20
摘要： A fixing device that includes a rotatable endless fixing member, a fixing heat source which heats the fixing member, a pressure member provided on the outside of the fixing member and facing the fixing member, a nip forming member provided inside the fixing member and forming a fixing nip between the fixing member and the pressure member, a nip forming support member for supporting the nip forming member, a high-thermal-conductive member provided between the fixing member and the nip forming member, an adhesive provided between the high-thermal-conductive member and the nip forming member. The thermal conductivity of the adhesive is larger than the thermal conductivity of the nip forming member and lower than the thermal conductivity of the high-thermal-conductive member.
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公开(公告)号：US20200285180A1
公开(公告)日：2020-09-10
申请号：US16794976
申请日：2020-02-19
申请人： Ryohei MATSUDA , Hiroyuki SHIMADA
发明人： Ryohei MATSUDA , Hiroyuki SHIMADA
IPC分类号： G03G15/20
摘要： A fixing device that includes a rotatable endless fixing member, a fixing heat source which heats the fixing member, a pressure member provided on the outside of the fixing member and facing the fixing member, a nip forming member provided inside the fixing member and forming a fixing nip between the fixing member and the pressure member, a nip forming support member for supporting the nip forming member, a high-thermal-conductive member provided between the fixing member and the nip forming member, an adhesive provided between the high-thermal-conductive member and the nip forming member. The thermal conductivity of the adhesive is larger than the thermal conductivity of the nip forming member and lower than the thermal conductivity of the high-thermal-conductive member.
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公开(公告)号：US10281850B2
公开(公告)日：2019-05-07
申请号：US15980123
申请日：2018-05-15
申请人： Ryohei Matsuda , Ippei Fujimoto , Kenji Ishii , Hiroshi Yoshinaga , Takayuki Seki , Kazunari Sawada
发明人： Ryohei Matsuda , Ippei Fujimoto , Kenji Ishii , Hiroshi Yoshinaga , Takayuki Seki , Kazunari Sawada
IPC分类号： G03G15/20
摘要： A fixing device includes an endless fixing belt, a heat source, an opposed member, a nip formation pad, and a heat conductive member. The nip formation pad includes an abutment region, a first opening portion, and second opening portions. The abutment region includes a plurality of abutment surfaces abutting a first face of the heat conductive member. The first opening portion is disposed at a center of the abutment region to form a non-contact area at which the nip formation pad does not contact the heat conductive member. The abutment region includes an upstream abutment area and a downstream abutment area from the first opening portion in a direction of conveyance of a recording medium. The second opening portions divide at least one area of the upstream abutment area and the downstream abutment area into a plurality of portions in a longitudinal direction of the nip formation pad.
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公开(公告)号：US10061235B2
公开(公告)日：2018-08-28
申请号：US15395410
申请日：2016-12-30
申请人： Keitaro Shoji , Yasunori Ishigaya , Kazuya Saito , Ryohei Matsuda , Hiromasa Takagi , Ryuuichi Mimbu , Toshihiko Shimokawa
发明人： Keitaro Shoji , Yasunori Ishigaya , Kazuya Saito , Ryohei Matsuda , Hiromasa Takagi , Ryuuichi Mimbu , Toshihiko Shimokawa
IPC分类号： G03G15/20
CPC分类号： G03G15/2039 , G03G15/2053
摘要： A fixing device includes an endless fixing belt that is multilayered, an opposing rotator disposed opposite the fixing belt and pressed to the fixing belt to form a nip, a heater disposed inside the fixing belt, and a safety device including a contactless temperature sensor disposed outside the fixing belt and apart from an outer face of the fixing. The fixing belt is to rotate and thermally expand. The contactless temperature sensor detects a temperature of the fixing belt. The safety device stops heating by the heater when the temperature detected by the contactless temperature sensor is at or higher than a predetermined temperature. As the outer face of the fixing belt shifts outward in the radial direction due to thermal, a proportion of the outer face of the fixing belt in a viewing angle of the contactless temperature sensor increases.
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公开(公告)号：US20170255147A1
公开(公告)日：2017-09-07
申请号：US15440179
申请日：2017-02-23
申请人： Takayuki SEKI , Kenji ISHll , Hiroshi YOSHINAGA , Takashi SETO , lppei FUJIMOTO , Kazunari SAWADA , Ryohei MATSUDA
发明人： Takayuki SEKI , Kenji ISHll , Hiroshi YOSHINAGA , Takashi SETO , lppei FUJIMOTO , Kazunari SAWADA , Ryohei MATSUDA
IPC分类号： G03G15/20
CPC分类号： G03G15/2053 , G03G15/2039 , G03G15/2042 , G03G15/2046 , G03G15/2057 , G03G2215/0132 , G03G2215/2035
摘要： A fixing device includes a fixing rotator, an opposed rotator disposed opposite the fixing rotator, a pressure pad, a lateral end heater, and a thermal conduction aid. The pressure pad presses against the opposed rotator via the fixing rotator to form a fixing nip between the fixing rotator and the opposed rotator. The lateral end heater is disposed on the pressure pad to heat a lateral end of the fixing rotator in the axial direction of the fixing rotator. The thermal conduction aid is interposed between the pressure pad and the fixing rotator to decrease a temperature gradient of the fixing rotator in an axial direction of the fixing rotator. The pressure pad includes a nip-side face disposed opposite the thermal conduction aid. The lateral end heater includes a nip-side face being disposed opposite the thermal conduction aid and projecting beyond the nip-side face of the pressure pad.
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公开(公告)号：US20160378033A1
公开(公告)日：2016-12-29
申请号：US15160374
申请日：2016-05-20
申请人： Yasunori ISHIGAYA , Yutaka IKEBUCHI , Kazuya SAITO , Keitaro SHOJI , Ryohei MATSUDA , Hiromasa TAKAGI , Ryuuichi MIMBU , Toshihiko SHIMOKAWA
发明人： Yasunori ISHIGAYA , Yutaka IKEBUCHI , Kazuya SAITO , Keitaro SHOJI , Ryohei MATSUDA , Hiromasa TAKAGI , Ryuuichi MIMBU , Toshihiko SHIMOKAWA
IPC分类号： G03G15/20
CPC分类号： G03G15/206 , G03G2215/0132 , G03G2215/2035
摘要： A fixing device includes a rotatable endless belt formed into a loop and a heater disposed opposite the endless belt to heat the endless belt. A nip formation pad is disposed inside the loop formed by the endless belt. The nip formation pad includes a metallic thermal equalizer extending in an axial direction of the endless belt. A rotatable pressure rotator presses against the nip formation pad via the endless belt to form a fixing nip between the endless belt and the pressure rotator, through which a recording medium bearing a toner image is conveyed. The pressure rotator includes an increased tackiness portion disposed at a lateral end of the pressure rotator in an axial direction of the pressure rotator to transmit a driving force to the endless belt. The increased tackiness portion is disposed opposite the thermal equalizer of the nip formation pad.
摘要翻译： 定影装置包括形成环的可旋转环形带和与环形带相对设置的加热环形带的加热器。 辊隙形成垫设置在由环形带形成的环内。 压区形成垫包括在环形带的轴向方向上延伸的金属热均衡器。 可旋转的压力旋转器通过环形带压靠在辊隙形成垫上，以在环形带和压力旋转器之间形成定影辊隙，通过该固定辊隙，承载有调色剂图像的记录介质。 压力旋转器包括在压力旋转器的轴向方向上设置在压力转子的侧端处的增加的粘性部分，以将驱动力传递到环形带。 增加的粘性部分设置成与辊隙形成垫的热均衡器相对。
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公开(公告)号：US20230280682A1
公开(公告)日：2023-09-07
申请号：US18157388
申请日：2023-01-20
申请人： Ryohei MATSUDA , Kentaro YAMASHITA
发明人： Ryohei MATSUDA , Kentaro YAMASHITA
IPC分类号： G03G15/20
CPC分类号： G03G15/2039
摘要： A fixing device includes a fixing rotator, a first heater, a second heater, and circuitry. The first heater heats a region on the fixing rotator to heat a recording medium having a width smaller than a predetermined width. The second heater heats a region on the fixing rotator to heat a maximum recording medium used in the fixing device. The second heater has a heat generation distribution in which a heat generation amount of each of both end portions corresponding to both end portions of the maximum recording medium in a width direction of the recording medium is larger than a heat generation amount of a center portion. The circuitry determines whether to turn on the first heater and turn off the second heater or to turn on both the first heater and the second heater based on a required power to bring the fixing rotator to a fixing temperature.
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