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.

公开(公告)号：US10197957B2

公开(公告)日：2019-02-05

申请号：US15969912

申请日：2018-05-03

申请人： Ippei Fujimoto ,  Kazunari Sawada ,  Kenji Ishii ,  Hiroshi Yoshinaga ,  Takayuki Seki ,  Ryohei Matsuda

发明人： Ippei Fujimoto ,  Kazunari Sawada ,  Kenji Ishii ,  Hiroshi Yoshinaga ,  Takayuki Seki ,  Ryohei Matsuda

IPC分类号： G03G15/20

摘要： A fixing device includes a fixing rotator, a plurality of heat sources having different heat distributions to heat the fixing rotator, a pressing member to press the fixing rotator and form a nip to fix the unfixed toner image on the recording material, a shield disposed between the plurality of heat sources, a plurality of temperature sensors each disposed opposite to the heat source, a processor to control the plurality of heat sources so that a temperature detected by the temperature sensor becomes a predetermined target temperature. The processor controls the heaters so that a temperature difference ΔT=T2−T1 becomes greater than zero, wherein T1 is the target temperature for the temperature sensor close to an entrance of the nip, and T2 is the target temperature for the temperature sensor far from the entrance of the nip.

公开(公告)号：US20180348680A1

公开(公告)日：2018-12-06

申请号：US15969912

申请日：2018-05-03

申请人： Ippei Fujimoto ,  Kazunari Sawada ,  Kenji Ishii ,  Hiroshi Yoshinaga ,  Takayuki Seki ,  Ryohei Matsuda

发明人： Ippei Fujimoto ,  Kazunari Sawada ,  Kenji Ishii ,  Hiroshi Yoshinaga ,  Takayuki Seki ,  Ryohei Matsuda

IPC分类号： G03G15/20

CPC分类号： G03G15/2039 ,  G03G15/2042 ,  G03G15/206

摘要： A fixing device includes a fixing rotator, a plurality of heat sources having different heat distributions to heat the fixing rotator, a pressing member to press the fixing rotator and form a nip to fix the unfixed toner image on the recording material, a shield disposed between the plurality of heat sources, a plurality of temperature sensors each disposed opposite to the heat source, a processor to control the plurality of heat sources so that a temperature detected by the temperature sensor becomes a predetermined target temperature. The processor controls the heaters so that a temperature difference ΔT=T2−T1 becomes greater than zero, wherein T1 is the target temperature for the temperature sensor close to an entrance of the nip, and T2 is the target temperature for the temperature sensor far from the entrance of the nip.

公开(公告)号：US20180059587A1

公开(公告)日：2018-03-01

申请号：US15684298

申请日：2017-08-23

申请人： Kazunari Sawada ,  lppei Fujimoto ,  Kenji Ishii ,  Hiroyuki Shimada ,  Takashi Seto ,  Hiroshi Yoshinaga ,  Takayuki Seki

发明人： Kazunari Sawada ,  lppei Fujimoto ,  Kenji Ishii ,  Hiroyuki Shimada ,  Takashi Seto ,  Hiroshi Yoshinaga ,  Takayuki Seki

IPC分类号： G03G15/20

CPC分类号： G03G15/2007 ,  G03G15/2053 ,  G03G2215/2035

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：US20170261900A1

公开(公告)日：2017-09-14

申请号：US15447709

申请日：2017-03-02

申请人： Kazunari Sawada ,  lppei Fujimoto ,  Kenji Ishii ,  Takashi Seto ,  Takayuki Seki ,  Hiroshi Yoshinaga ,  Ryohei Matsuda

发明人： Kazunari Sawada ,  lppei Fujimoto ,  Kenji Ishii ,  Takashi Seto ,  Takayuki Seki ,  Hiroshi Yoshinaga ,  Ryohei Matsuda

IPC分类号： G03G15/20

CPC分类号： G03G15/2089 ,  G03G15/2053 ,  G03G15/206 ,  G03G15/2064 ,  G03G2215/2035

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.