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公开(公告)号:US10082751B2
公开(公告)日:2018-09-25
申请号:US15804459
申请日:2017-11-06
申请人: Takashi Seto , Kenji Ishii , Hiroshi Yoshinaga , Takayuki Seki , Ippei Fujimoto , Hiroyuki Shimada , Kazunari Sawada , Ryohei Matsuda
发明人: Takashi Seto , Kenji Ishii , Hiroshi Yoshinaga , Takayuki Seki , Ippei Fujimoto , Hiroyuki Shimada , Kazunari Sawada , Ryohei Matsuda
IPC分类号: G03G15/20
CPC分类号: G03G15/2025 , G03G15/2028 , G03G15/2053 , G03G2215/2035
摘要: A fixing device includes a belt, a pressure rotator disposed opposite the belt, and a nip formation unit that forms a fixing nip between the belt and the pressure rotator. The nip formation unit includes a guide face disposed upstream from the fixing nip in a rotation direction of the belt and contoured to separate from the pressure rotator in a direction opposite the rotation direction of the belt. The guide face is adhered with a lubricant moved from an inner circumferential surface of the belt. The belt rotates in the rotation direction when an outer circumferential surface of the belt has a temperature lower than a fixing temperature at which the belt fixes a toner image on a recording medium. The belt rotating in the rotation direction brings the lubricant adhered to the guide face into contact with the belt.
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公开(公告)号:US10222732B2
公开(公告)日:2019-03-05
申请号:US15440179
申请日:2017-02-23
申请人: Takayuki Seki , Kenji Ishii , Hiroshi Yoshinaga , Takashi Seto , Ippei Fujimoto , Kazunari Sawada , Ryohei Matsuda
发明人: Takayuki Seki , Kenji Ishii , Hiroshi Yoshinaga , Takashi Seto , Ippei Fujimoto , Kazunari Sawada , Ryohei Matsuda
IPC分类号: G03G15/20
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:US10025247B2
公开(公告)日:2018-07-17
申请号:US15447709
申请日:2017-03-02
申请人: Kazunari Sawada , Ippei Fujimoto , Kenji Ishii , Takashi Seto , Takayuki Seki , Hiroshi Yoshinaga , Ryohei Matsuda
发明人: Kazunari Sawada , Ippei Fujimoto , Kenji Ishii , Takashi Seto , Takayuki Seki , Hiroshi Yoshinaga , Ryohei Matsuda
IPC分类号: G03G15/20
摘要: A fixing device includes fixing rotator, a heater to heat the fixing rotator, a pressure rotator disposed opposite an outer circumferential surface of the fixing rotator, a pressure pad disposed opposite an inner circumferential surface of the fixing rotator, a support to support the pressure pad, and a thermal conduction aid to conduct heat in an axial direction of the fixing rotator. The pressure pad presses against the pressure rotator via the fixing rotator to form a fixing nip between the fixing rotator and the pressure rotator. The pressure pad includes a nip-side face disposed opposite the inner circumferential surface of the fixing rotator. The thermal conduction aid covers the nip-side face of the pressure pad. The nip-side face of the pressure pad includes at least one mouth therein defining a non-contact area in which the pressure pad does not contact the thermal conduction aid.
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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: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: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: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: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:US20180356754A1
公开(公告)日:2018-12-13
申请号:US15984674
申请日:2018-05-21
申请人: Hiroshi Yoshinaga , Ippei Fujimoto , Kenji Ishii , Takayuki Seki , Kazunari Sawada , Ryohei Matsuda
发明人: Hiroshi Yoshinaga , Ippei Fujimoto , Kenji Ishii , Takayuki Seki , Kazunari Sawada , Ryohei Matsuda
IPC分类号: G03G15/20
CPC分类号: G03G15/2064
摘要: A fixing device includes an endless fixing rotator, a heater, a nip formation assembly, and an opposed rotator. The endless fixing rotator is rotatable in a direction of rotation. The heater heats the fixing rotator. The nip formation assembly is disposed opposite an inner circumferential surface of the fixing rotator. The opposed rotator is pressed against the nip formation assembly via the fixing rotator to form a fixing nip between the fixing rotator and the opposed rotator. The nip formation assembly includes a nip former to contact the inner circumferential surface of the fixing rotator, maintain a constant thickness against pressure from the opposed rotator, and transfer heat. The opposed rotator is shorter than the nip former in a longitudinal direction of the opposed rotator. The opposed rotator is disposed within an area opposite the nip former.
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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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