公开(公告)号：US11852994B2

公开(公告)日：2023-12-26

申请号：US17761194

申请日：2020-11-17

申请人： Yoshiki Yamaguchi ,  Ippei Fujimoto

发明人： Yoshiki Yamaguchi ,  Ippei Fujimoto

IPC分类号： G03G15/20

CPC分类号： G03G15/2053 ,  G03G15/2025 ,  G03G15/2042

摘要： The fixing device includes a fixing member, a heat source, a pressure member, a nip forming member, and a heat equalizing member. The heat equalizing member covers a face of the nip forming member, the face facing the fixing member, and transfers heat in an axial direction of the fixing member. The fixing member includes at least a tubular base made of metal and a sliding layer made of heat resistant resin on an inner circumferential surface of the base. The heat equalizing member made of aluminum or an aluminum alloy includes an alumite layer on a surface facing an inner circumferential surface of the fixing member. A plurality of micropores in the alumite layer is filled with a solid lubricant having a coefficient of friction lower than that of the alumite layer. The alumite layer has a thickness smaller than that of the sliding layer of the fixing member.

公开(公告)号：US20200292974A1

公开(公告)日：2020-09-17

申请号：US16802714

申请日：2020-02-27

申请人： Ippei FUJIMOTO ,  Yoshiki Yamaguchi

发明人： Ippei FUJIMOTO ,  Yoshiki Yamaguchi

IPC分类号： G03G15/20

摘要： A fixing device includes a fixing rotator, a pressure rotator, a heat source, a nip formation pad, and a support. The nip formation pad presses against the pressure rotator to form a fixing nip between the fixing rotator and the pressure rotator. The support supports the nip formation pad toward the fixing nip. A longitudinal end portion of the pressure rotator has an outer diameter greater than that of a longitudinal center portion of the pressure rotator. The pressure rotator includes a grip that contacts the nip formation pad via the fixing rotator outside a recording medium with a maximum width conveyable passing through the fixing nip and applies a frictional force to the fixing rotator. The nip formation pad includes a nip face having an inflection point from which a longitudinal direction of the nip face is curved toward the support within an area opposite the grip.

公开(公告)号：US10691049B2

公开(公告)日：2020-06-23

申请号：US16419068

申请日：2019-05-22

申请人： Ippei Fujimoto ,  Hiroyuki Shimada ,  Yoshiki Yamaguchi ,  Takashi Seto ,  Takayuki Seki

发明人： Ippei Fujimoto ,  Hiroyuki Shimada ,  Yoshiki Yamaguchi ,  Takashi Seto ,  Takayuki Seki

IPC分类号： G03G15/20

摘要： A fixing device includes a fixing rotator and a pressure rotator that is disposed opposite the fixing rotator. A nip former is disposed inside a loop formed by the fixing rotator and disposed opposite the pressure rotator via the fixing rotator to form a fixing nip between the fixing rotator and the pressure rotator. The fixing rotator slides over the nip former. A flange supports the fixing rotator at both lateral ends of the fixing rotator in a longitudinal direction of the fixing rotator. The nip former includes a base and a thermal conductor that has a thermal conductivity greater than a thermal conductivity of the base. The base is greater than the thermal conductor in the longitudinal direction of the fixing rotator. The base includes a groove that is disposed outboard at least from the thermal conductor in the longitudinal direction of the fixing rotator.

公开(公告)号：US10571837B2

公开(公告)日：2020-02-25

申请号：US16239948

申请日：2019-01-04

申请人： Yoshiki Yamaguchi ,  Ippei Fujimoto ,  Hiroyuki Shimada ,  Takayuki Seki ,  Takashi Seto ,  Yoshiyuki Fukuda ,  Hiroshi Yoshinaga

发明人： Yoshiki Yamaguchi ,  Ippei Fujimoto ,  Hiroyuki Shimada ,  Takayuki Seki ,  Takashi Seto ,  Yoshiyuki Fukuda ,  Hiroshi Yoshinaga

IPC分类号： G03G15/20

摘要： A fixing device includes a fixing rotator that is flexible, endless, and rotatable. A heater heats the fixing rotator. A pressure rotator is disposed opposite the fixing rotator. A nip former defines a fixing nip between the fixing rotator and the pressure rotator. A support supports the nip former. The nip former includes a back face that contacts the support and has a nonlinear shape in a longitudinal direction of the nip former.

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：US20180284669A1

公开(公告)日：2018-10-04

申请号：US15924631

申请日：2018-03-19

申请人： Ippei FUJIMOTO ,  Hiroshi YOSHINAGA ,  Kenji ISHII ,  Hiroyuki SHIMADA ,  Takashi SETO ,  Takayuki SEKI ,  Kazunari SAWADA

发明人： Ippei FUJIMOTO ,  Hiroshi YOSHINAGA ,  Kenji ISHII ,  Hiroyuki SHIMADA ,  Takashi SETO ,  Takayuki SEKI ,  Kazunari SAWADA

IPC分类号： G03G15/20

CPC分类号： G03G15/2028 ,  G03G15/2039 ,  G03G15/2053 ,  G03G15/206

摘要： A fixing device includes a fixing rotator and a lateral end heater to heat a lateral end span of the fixing rotator in an axial direction thereof. A thermal conduction aid contacts the fixing rotator. A nip formation pad contacts the thermal conduction aid. A lateral end temperature detector detects a temperature of the fixing rotator in a lateral end detection span in the axial direction of the fixing rotator. The thermal conduction aid contacts the nip formation pad in a first span including the lateral end detection span in the axial direction of the fixing rotator with a first contact area. The thermal conduction aid contacts the nip formation pad in a second span disposed outboard from the first span in the axial direction of the fixing rotator with a second contact area smaller than the first contact area.

公开(公告)号：US10001735B2

公开(公告)日：2018-06-19

申请号：US15384838

申请日：2016-12-20

申请人： Takahiro Imada ,  Masaaki Yoshikawa ,  Kenji Ishii ,  Hiroshi Yoshinaga ,  Yuji Arai ,  Naoki Iwaya ,  Tetsuo Tokuda ,  Hiromasa Takagi ,  Yoshiki Yamaguchi ,  Ippei Fujimoto ,  Takuya Seshita ,  Yutaka Ikebuchi ,  Arinobu Yoshiura ,  Toshihiko Shimokawa ,  Hajime Gotoh

发明人： Takahiro Imada ,  Masaaki Yoshikawa ,  Kenji Ishii ,  Hiroshi Yoshinaga ,  Yuji Arai ,  Naoki Iwaya ,  Tetsuo Tokuda ,  Hiromasa Takagi ,  Yoshiki Yamaguchi ,  Ippei Fujimoto ,  Takuya Seshita ,  Yutaka Ikebuchi ,  Arinobu Yoshiura ,  Toshihiko Shimokawa ,  Hajime Gotoh

IPC分类号： G03G15/20

CPC分类号： G03G15/2053 ,  G03G15/2064 ,  G03G2215/2035

摘要： A fixing device may include an endless fixing member; a heater inside the fixing member; and a nip forming unit configured to form a nip through which a recording sheet is conveyed, the nip forming unit including a supporting member and a contact member supported by the supporting member, the supporting member including at least one contact surface and the contact member including a plurality of protrusions protruding towards the supporting member such that two or more of the plurality of protrusions are configured to contact one of the at least one contact surface of the supporting member, each of the plurality of protrusions having a height associated there with such that the height of the plurality of protrusions increases in a direction from ends of the contact member towards a center of the contact member.

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.