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公开(公告)号:US10295937B2
公开(公告)日:2019-05-21
申请号:US15684298
申请日:2017-08-23
申请人: Kazunari Sawada , Ippei Fujimoto , Kenji Ishii , Hiroyuki Shimada , Takashi Seto , Hiroshi Yoshinaga , Takayuki Seki
发明人: Kazunari Sawada , Ippei Fujimoto , Kenji Ishii , Hiroyuki Shimada , Takashi Seto , Hiroshi Yoshinaga , Takayuki Seki
IPC分类号: G03G15/20
摘要: A fixing device includes a heat generator being disposed inside a loop formed by a rotator and including a heat generating portion to radiate radiant heat. A reflector is disposed inside the loop formed by the rotator and includes a reflection face to reflect the radiant heat radiated from the heat generator toward the rotator. A support supports the reflector. A holder holds each lateral end of the support in a longitudinal direction of the support, which is perpendicular to the rotation direction of the rotator. A fastener attaches the reflector to the support at an attachment position disposed at each lateral end of the reflector in a longitudinal direction of the reflector. The attachment position is disposed outboard from a lateral edge of the heat generating portion of the heat generator and disposed inboard from the holder in the longitudinal direction of the reflector.
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公开(公告)号:US09989905B2
公开(公告)日:2018-06-05
申请号:US15604294
申请日:2017-05-24
申请人: Takayuki Seki , Takashi Seto , Hiroshi Yoshinaga , Kenji Ishii , Ippei Fujimoto , Kazunari Sawada
发明人: Takayuki Seki , Takashi Seto , Hiroshi Yoshinaga , Kenji Ishii , Ippei Fujimoto , Kazunari Sawada
IPC分类号: G03G15/20
CPC分类号: G03G15/2053 , G03G15/2042 , G03G2215/2035
摘要: A fixing device includes a nip formation pad which is disposed opposite an endless belt and forms a fixing nip between the endless belt and a pressure rotator. A contact heater is disposed at least at one lateral end of the nip formation pad in a longitudinal direction thereof and heats at least one lateral end of the endless belt in an axial direction thereof. A thermal conduction aid contacts a belt-side face of each of the nip formation pad and the contact heater and conducts heat in the axial direction of the endless belt. A cover is disposed outboard from the thermal conduction aid in a longitudinal direction thereof. The cover covers the belt-side face of the contact heater. The contact heater includes a power supply portion disposed outboard from the thermal conduction aid in the longitudinal direction thereof and covered by the cover.
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公开(公告)号:US10331062B2
公开(公告)日:2019-06-25
申请号:US15783199
申请日:2017-10-13
申请人: Hiroshi Yoshinaga , Kenji Ishii , Hiroyuki Shimada , Ippei Fujimoto , Takashi Seto , Takayuki Seki , Kazunari Sawada
发明人: Hiroshi Yoshinaga , Kenji Ishii , Hiroyuki Shimada , Ippei Fujimoto , Takashi Seto , Takayuki Seki , Kazunari Sawada
摘要: An image forming apparatus includes a fixing device that includes a heater to heat a fixing rotator, an opposed rotator to press against the fixing rotator to form a fixing nip therebetween, and at least one rotary body to convey a recording medium to the fixing nip. A controller rotates the fixing rotator in a forward direction to fix a toner image on the recording medium. The controller stops the heater and rotates the fixing rotator in a predetermined rotation direction when a failure occurs while the fixing device is activated. The controller determines that the predetermined rotation direction is the forward direction or a backward direction according to the at least one rotary body that sandwiches the recording medium, if the fixing nip and the at least one rotary body sandwich the recording medium simultaneously when the failure occurs while the fixing device is activated.
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公开(公告)号:US10295939B2
公开(公告)日:2019-05-21
申请号:US15627693
申请日:2017-06-20
申请人: Hiroshi Yoshinaga , Kenji Ishii , Ippei Fujimoto , Takashi Seto , Takayuki Seki , Kazunari Sawada , Ryohei Matsuda
发明人: Hiroshi Yoshinaga , Kenji Ishii , Ippei Fujimoto , Takashi Seto , Takayuki Seki , Kazunari Sawada , Ryohei Matsuda
IPC分类号: G03G15/20
摘要: A fixing device includes an endless belt and a pressure rotator disposed opposite an outer circumferential surface of the endless belt. The pressure rotator has a first span in an axial direction of the endless belt. A nip formation pad, which is disposed opposite an inner circumferential surface of the endless belt, forms a fixing nip between the endless belt and the pressure rotator. The nip formation pad includes a belt-side face disposed opposite the endless belt. A radiant heater, which is disposed opposite the inner circumferential surface of the endless belt, heats the endless belt. A thermal conduction aid, which contacts the belt-side face of the nip formation pad, conducts heat in the axial direction of the endless belt. The thermal conduction aid has a second span within which the first span of the pressure rotator is provided at the fixing nip.
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公开(公告)号:US10289037B2
公开(公告)日:2019-05-14
申请号:US15827085
申请日:2017-11-30
申请人: Takayuki Seki , Takashi Seto , Kenji Ishii , Hiroshi Yoshinaga , Ippei Fujimoto , Kazunari Sawada , Hiroyuki Shimada
发明人: Takayuki Seki , Takashi Seto , Kenji Ishii , Hiroshi Yoshinaga , Ippei Fujimoto , Kazunari Sawada , Hiroyuki Shimada
摘要: 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.
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公开(公告)号:US09851667B2
公开(公告)日:2017-12-26
申请号:US15378214
申请日:2016-12-14
申请人: Takayuki Seki , Kenji Ishii , Kazuhito Kishi , Takashi Seto , Hiroshi Yoshinaga , Ippei Fujimoto , Kazunari Sawada
发明人: Takayuki Seki , Kenji Ishii , Kazuhito Kishi , Takashi Seto , Hiroshi Yoshinaga , Ippei Fujimoto , Kazunari Sawada
IPC分类号: G03G15/20
CPC分类号: G03G15/2053 , G03G15/2007 , G03G2215/2035
摘要: A fixing device includes an endless belt, a nip formation pad disposed inside a loop formed by the endless belt, and a radiant heater to heat the endless belt. A contact heater is disposed at least at one lateral end of the nip formation pad in a longitudinal direction of the nip formation pad. The contact heater includes a heat generator to heat at least one lateral end of the endless belt in an axial direction of the endless belt. A thermal conduction aid, covering a nip-side face of the nip formation pad and a nip-side face of the contact heater, conducts heat applied to the endless belt in the axial direction of the endless belt. The thermal conduction aid includes a heater-side face being disposed opposite the contact heater and covering at least the heat generator of the contact heater.
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公开(公告)号:US09851663B2
公开(公告)日:2017-12-26
申请号:US15144055
申请日:2016-05-02
申请人: Shohta Kobashigawa , Kenji Ishii , Kazuhito Kishi , Takayuki Seki , Hiroshi Yoshinaga , Takashi Seto , Hiromasa Takagi , Ippei Fujimoto , Hiroshi Seo , Takamasa Hase , Kazunari Sawada , Yasuhiko Ogino
发明人: Shohta Kobashigawa , Kenji Ishii , Kazuhito Kishi , Takayuki Seki , Hiroshi Yoshinaga , Takashi Seto , Hiromasa Takagi , Ippei Fujimoto , Hiroshi Seo , Takamasa Hase , Kazunari Sawada , Yasuhiko Ogino
IPC分类号: G03G15/20
CPC分类号: G03G15/2053 , G03G2215/2035
摘要: A fixing device includes a primary heater disposed opposite a fixing rotator to heat a circumferential span of the fixing rotator other than a fixing nip formed between the fixing rotator and a pressure rotator and a secondary heater disposed outboard from the primary heater in an axial direction of the fixing rotator to heat the fixing rotator at the fixing nip. The primary heater and the secondary heater heat a bi-heating span of the fixing rotator in the axial direction thereof. The secondary heater heats a mono-heating span of the fixing rotator in the axial direction thereof and generates a decreased amount of heat to be conducted to the bi-heating span of the fixing rotator. The decreased amount of heat is smaller than an increased amount of heat to be conducted to the mono-heating span of the fixing rotator that is heated by the secondary heater only.
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公开(公告)号:US20180120741A1
公开(公告)日:2018-05-03
申请号:US15783199
申请日:2017-10-13
申请人: Hiroshi YOSHINAGA , Kenji Ishii , Hiroyuki Shimada , Ippei Fujimoto , Takashi Seto , Takayuki Seki , Kazunari Sawada
发明人: Hiroshi YOSHINAGA , Kenji Ishii , Hiroyuki Shimada , Ippei Fujimoto , Takashi Seto , Takayuki Seki , Kazunari Sawada
IPC分类号: G03G15/20
CPC分类号: G03G15/2039 , G03G15/2017 , G03G15/55
摘要: An image forming apparatus includes a fixing device that includes a heater to heat a fixing rotator, an opposed rotator to press against the fixing rotator to form a fixing nip therebetween, and at least one rotary body to convey a recording medium to the fixing nip. A controller rotates the fixing rotator in a forward direction to fix a toner image on the recording medium. The controller stops the heater and rotates the fixing rotator in a predetermined rotation direction when a failure occurs while the fixing device is activated. The controller determines that the predetermined rotation direction is the forward direction or a backward direction according to the at least one rotary body that sandwiches the recording medium, if the fixing nip and the at least one rotary body sandwich the recording medium simultaneously when the failure occurs while the fixing device is activated.
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公开(公告)号:US20170364000A1
公开(公告)日:2017-12-21
申请号:US15604294
申请日:2017-05-24
申请人: Takayuki Seki , Takashi Seto , Hiroshi Yoshinaga , Kenji Ishii , Ippei Fujimoto , Kazunari Sawada
发明人: Takayuki Seki , Takashi Seto , Hiroshi Yoshinaga , Kenji Ishii , Ippei Fujimoto , Kazunari Sawada
IPC分类号: G03G15/20
CPC分类号: G03G15/2053 , G03G15/2042 , G03G2215/2035
摘要: A fixing device includes a nip formation pad which is disposed opposite an endless belt and forms a fixing nip between the endless belt and a pressure rotator. A contact heater is disposed at least at one lateral end of the nip formation pad in a longitudinal direction thereof and heats at least one lateral end of the endless belt in an axial direction thereof. A thermal conduction aid contacts a belt-side face of each of the nip formation pad and the contact heater and conducts heat in the axial direction of the endless belt. A cover is disposed outboard from the thermal conduction aid in a longitudinal direction thereof. The cover covers the belt-side face of the contact heater. The contact heater includes a power supply portion disposed outboard from the thermal conduction aid in the longitudinal direction thereof and covered by the cover.
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10.
公开(公告)号:US09846397B2
公开(公告)日:2017-12-19
申请号:US15375757
申请日:2016-12-12
申请人: Kazunari Sawada , Kenji Ishii , Kazuhito Kishi , Takayuki Seki , Ippei Fujimoto , Hiroshi Yoshinaga , Takashi Seto
发明人: Kazunari Sawada , Kenji Ishii , Kazuhito Kishi , Takayuki Seki , Ippei Fujimoto , Hiroshi Yoshinaga , Takashi Seto
IPC分类号: G03G15/20
CPC分类号: G03G15/2028 , G03G15/2053 , G03G2215/2035
摘要: A fixing device includes an endless belt formed into a loop, a heater to heat the endless belt, a nip formation assembly disposed inside the loop, and a pressure rotator to press against the nip formation assembly to form a fixing nip between the endless belt and the pressure rotator. The nip formation assembly includes a pressure pad and a supplementary thermal conductor to conduct heat from the heater in an axial direction of the endless belt. The supplementary thermal conductor has an edge portion dimensioned to distance the supplementary thermal conductor from the endless belt at an end portion of a face over which the endless belt slides in a longitudinal direction of the supplementary thermal conductor. A distance between the edge portion of the supplementary thermal conductor and the endless belt increases toward an end portion of the endless belt in the axial direction thereof.
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