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.

公开(公告)号：US10241448B2

公开(公告)日：2019-03-26

申请号：US15627704

申请日：2017-06-20

申请人： Kazunari Sawada ,  Ippei Fujimoto ,  Kenji Ishii ,  Takashi Seto ,  Hiroshi Yoshinaga ,  Takayuki Seki

发明人： Kazunari Sawada ,  Ippei Fujimoto ,  Kenji Ishii ,  Takashi Seto ,  Hiroshi Yoshinaga ,  Takayuki Seki

IPC分类号： G03G15/20

摘要： A fixing device includes a nip former including a first face to form a fixing nip, a second face being disposed upstream from the first face in a rotation direction of a rotator and defining a predetermined angle relative to the first face, and a bent portion coupling the first face to the second face. An inner circumferential surface of the rotator slides over the first face. A lateral end accumulation portion and a center accumulation portion are defined by the second face and the bent portion of the nip former and the inner circumferential surface of the rotator. The lateral end accumulation portion is accumulated with a lubricant in a first amount. The center accumulation portion is disposed inboard from the lateral end accumulation portion in an axial direction of the rotator and accumulated with the lubricant in a second amount greater than the first amount.

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.

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

IPC分类号： G03G15/20 ,  G03G15/00

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.

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.

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

IPC分类号： G03G15/20 ,  G03G15/01 ,  G03G15/00

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.

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.

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.

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.

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.