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：US11054773B2

公开(公告)日：2021-07-06

申请号：US16784475

申请日：2020-02-07

申请人： Yuusuke Furuichi ,  Kenji Ishii ,  Kenichi Hasegawa ,  Takashi Fujita ,  Tomoya Adachi ,  Yukimichi Someya ,  Daisuke Inoue ,  Masahiro Samei ,  Takayuki Seki

发明人： Yuusuke Furuichi ,  Kenji Ishii ,  Kenichi Hasegawa ,  Takashi Fujita ,  Tomoya Adachi ,  Yukimichi Someya ,  Daisuke Inoue ,  Masahiro Samei ,  Takayuki Seki

IPC分类号： G03G15/20

摘要： A heater includes a base layer, a heat generator mounted on the base layer, and a slide layer mounted on the base layer. A sliding face of a counterpart slides over the slide layer. The slide layer is made of a material containing fluorine and includes a slide face that contacts the sliding face of the counterpart. The slide face of the slide layer has a surface roughness that is greater than a surface roughness of the sliding face of the counterpart.

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：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：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.

公开(公告)号：US09778606B2

公开(公告)日：2017-10-03

申请号：US15011982

申请日：2016-02-01

申请人： Takayuki Seki ,  Susumu Matsusaka ,  Yasuhiko Ogino ,  Shohta Kobashigawa ,  Kenji Ishii ,  Kazuhito Kishi ,  Takashi Seto ,  Ippei Fujimoto ,  Kazunari Sawada ,  Hiroshi Yoshinaga

发明人： Takayuki Seki ,  Susumu Matsusaka ,  Yasuhiko Ogino ,  Shohta Kobashigawa ,  Kenji Ishii ,  Kazuhito Kishi ,  Takashi Seto ,  Ippei Fujimoto ,  Kazunari Sawada ,  Hiroshi Yoshinaga

IPC分类号： G03G15/20

CPC分类号： G03G15/2053 ,  G03G15/2064

摘要： A fixing device includes a first heater and a second heater disposed inside a fixing rotator to heat the fixing rotator. The first heater generates an increased amount of heat and includes a first heat generator having a first heating span in a longitudinal direction of the first heater. The second heater generates a decreased amount of heat and includes a second heat generator having a second heating span in a longitudinal direction of the second heater. A partition is interposed between the first heater and the second heater to define a first compartment having an increased size and accommodating the first heater and a second compartment having a decreased size and accommodating the second heater.

公开(公告)号：US20160223963A1

公开(公告)日：2016-08-04

申请号：US15010012

申请日：2016-01-29

申请人： Hiroshi YOSHINAGA ,  Kenji Ishii ,  Kazuhito Kishi ,  Takashi Seto ,  Takayuki Seki ,  Ippei Fujimoto ,  Kazunari Sawada ,  Susumu Matsusaka ,  Yasuhiko Ogino ,  Shohta Kobashigawa

发明人： Hiroshi YOSHINAGA ,  Kenji Ishii ,  Kazuhito Kishi ,  Takashi Seto ,  Takayuki Seki ,  Ippei Fujimoto ,  Kazunari Sawada ,  Susumu Matsusaka ,  Yasuhiko Ogino ,  Shohta Kobashigawa

IPC分类号： G03G15/20

CPC分类号： G03G15/2053 ,  G03G15/2042 ,  G03G15/205 ,  G03G2215/2035

摘要： A fixing device includes a fixing rotator and an opposed rotator pressed against the fixing rotator to form a fixing nip therebetween. A primary heater is disposed opposite the fixing rotator in a circumferential span of the fixing rotator other than the fixing nip in a circumferential direction of the fixing rotator to heat the fixing rotator. A heat shield is interposed between the primary heater and the fixing rotator and disposed outboard from at least a decreased size recording medium conveyance span of the fixing rotator spanning in an axial direction of the fixing rotator where a recording medium having a decreased size in the axial direction of the fixing rotator is conveyed. The heat shield shields the fixing rotator from the primary heater. A secondary heater is mounted on the heat shield to heat the fixing rotator.

摘要翻译： 定影装置包括固定旋转器和压靠固定旋转器的相对旋转体，以在它们之间形成定影辊隙。 在固定旋转器的圆周方向上，除了定影夹持部之外，在固定旋转体的周向跨度中，一次加热器与固定旋转体相对设置，以加热定影旋转体。 隔热板设置在主加热器和定影旋转器之间，并且设置在定影旋转器的轴向方向上至少缩小尺寸的记录介质传送跨度的外侧，其中定影旋转器的轴向尺寸减小的记录介质 传送定影旋转器的方向。 隔热罩将固定旋转器从主加热器屏蔽。 二次加热器安装在隔热罩上以加热定影旋转器。

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.

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.