公开(公告)号：US09581948B2

公开(公告)日：2017-02-28

申请号：US14504626

申请日：2014-10-02

申请人： Hiromasa Takagi ,  Kenji Ishii ,  Takayuki Seki ,  Keitaro Shoji

发明人： Hiromasa Takagi ,  Kenji Ishii ,  Takayuki Seki ,  Keitaro Shoji

IPC分类号： G03G15/20

CPC分类号： G03G15/206 ,  G03G15/2042 ,  G03G15/2053

摘要： A fixing device includes a fixing rotator and a pressure rotator pressed against a nip formation pad via the fixing rotator to form a fixing nip between the fixing rotator and the pressure rotator, through which a recording medium is conveyed. The nip formation pad includes an increased thermal conduction portion having an increased thermal conductivity and a decreased thermal conduction portion having a decreased thermal conductivity and being inboard from the increased thermal conduction portion in the axial direction of the fixing rotator. The increased thermal conduction portion is disposed opposite a non-conveyance span of the fixing rotator where the recording medium is not conveyed and includes an inboard edge inboard from a lateral edge of the recording medium toward a center of the recording medium in the axial direction of the fixing rotator by a predetermined first distance.

摘要翻译： 定影装置包括固定旋转器和经由固定旋转器压靠在压区形成垫上的压力旋转器，以在定影旋转器和压力旋转器之间形成定影夹持部，通过该定影辊隙传送记录介质。 压区形成垫包括具有增加的导热性的增加的热传导部分和具有降低的导热性的降低的热传导部分，并且在固定旋转体的轴向方向上从增加的热传导部分内侧。 增加的热传导部分与固定旋转器的非传送跨度相对，其中记录介质不被传送，并且包括从记录介质的侧边缘朝向记录介质的轴向方向的中心的内侧边缘 固定旋转器预定的第一距离。

公开(公告)号：US09291966B2

公开(公告)日：2016-03-22

申请号：US14467341

申请日：2014-08-25

申请人： Keitaro Shoji ,  Kenji Ishii ,  Hiromasa Takagi ,  Takayuki Seki

发明人： Keitaro Shoji ,  Kenji Ishii ,  Hiromasa Takagi ,  Takayuki Seki

IPC分类号： G03G15/20

CPC分类号： G03G15/2053 ,  G03G2215/2035

摘要： A fixing device includes a fixing rotator rotatable in a predetermined direction of rotation and an opposed rotator disposed opposite the fixing rotator to form a fixing nip therebetween through which a recording medium bearing a toner image is conveyed. A heater is disposed opposite the fixing rotator to heat the fixing rotator. A nip formation pad is disposed opposite an inner circumferential surface of the fixing rotator. The nip formation pad includes a base, a first thermal conductor sandwiched between the base and the fixing rotator and having a first thermal conductivity greater than a thermal conductivity of the base, and a bulge projecting from the first thermal conductor toward the opposed rotator at a downstream end of the first thermal conductor in a recording medium conveyance direction.

摘要翻译： 定影装置包括可沿预定旋转方向旋转的定影旋转器和与定影旋转体相对设置的相对旋转体，以在其间传送承载有调色剂图像的记录介质的定影辊隙。 加热器与定影旋转器相对设置，以加热定影旋转器。 压区形成垫与定影旋转体的内周面相对设置。 压区形成垫包括基座，夹在基座和固定旋转体之间的第一热导体，其第一导热率大于基座的导热率，以及从第一导热体向相对旋转体突出的凸起， 第一热导体的下游端在记录介质输送方向上。

公开(公告)号：US09618888B2

公开(公告)日：2017-04-11

申请号：US15040691

申请日：2016-02-10

申请人： Keitaro Shoji ,  Kenji Ishii ,  Hiromasa Takagi ,  Takayuki Seki

发明人： Keitaro Shoji ,  Kenji Ishii ,  Hiromasa Takagi ,  Takayuki Seki

IPC分类号： G03G15/20

CPC分类号： G03G15/2053 ,  G03G2215/2035

摘要： A fixing device includes a fixing rotator rotatable in a predetermined direction of rotation and an opposed rotator disposed opposite the fixing rotator to form a fixing nip therebetween through which a recording medium bearing a toner image is conveyed. A heater is disposed opposite the fixing rotator to heat the fixing rotator. A nip formation pad is disposed opposite an inner circumferential surface of the fixing rotator. The nip formation pad includes a base, a first thermal conductor sandwiched between the base and the fixing rotator and having a first thermal conductivity greater than a thermal conductivity of the base, and a bulge projecting from the first thermal conductor toward the opposed rotator at a downstream end of the first thermal conductor in a recording medium conveyance direction.

公开(公告)号：US09529309B2

公开(公告)日：2016-12-27

申请号：US14531313

申请日：2014-11-03

申请人： Kenji Ishii ,  Hiromasa Takagi ,  Takayuki Seki ,  Keitaro Shoji

发明人： Kenji Ishii ,  Hiromasa Takagi ,  Takayuki Seki ,  Keitaro Shoji

IPC分类号： G03G15/20

CPC分类号： G03G15/2053 ,  G03G15/2042 ,  G03G2215/2025 ,  G03G2215/2029 ,  G03G2215/2032 ,  G03G2215/2035 ,  G03G2215/2038

摘要： A fixing device includes a fixing rotator, a nip formation pad disposed opposite an inner circumferential surface of the fixing rotator, and a pressure rotator pressed against the nip formation pad via the fixing rotator to form a fixing nip between the fixing rotator and the pressure rotator, through which a recording medium is conveyed. A support is disposed opposite the pressure rotator via the nip formation pad to support the nip formation pad against pressure from the pressure rotator. The nip formation pad conducts heat in a thickness direction thereof perpendicular to an axial direction of the fixing rotator and a recording medium conveyance direction. The nip formation pad includes a multi-conductivity layer having a thermal conductivity varying in the axial direction of the fixing rotator and a support side layer contacting the support and having a thermal conductivity greater than a thermal conductivity of the support.

摘要翻译： 定影装置包括固定旋转体，与定影旋转体的内周面相对配置的压区形成垫，以及经由固定旋转体压靠在压区形成垫上的压力旋转体，在固定旋转体和压力旋转体之间形成定影辊隙 传送记录媒体。 支撑件通过压区形成垫与压力旋转体相对设置，以支撑压区形成垫抵抗来自压力旋转器的压力。 压区形成垫沿与固定旋转体的轴向垂直的厚度方向和记录介质输送方向传导热量。 压区形成垫包括具有在固定旋转体的轴向上变化的热导率的多导电层和与支撑体接触并具有大于载体的热导率的导热性的支撑侧层。

公开(公告)号：US20150110531A1

公开(公告)日：2015-04-23

申请号：US14504626

申请日：2014-10-02

申请人： Hiromasa TAKAGI ,  Kenji ISHII ,  Takayuki SEKI ,  Keitaro Shoji

发明人： Hiromasa TAKAGI ,  Kenji ISHII ,  Takayuki SEKI ,  Keitaro Shoji

IPC分类号： G03G15/20

CPC分类号： G03G15/206 ,  G03G15/2042 ,  G03G15/2053

摘要： A fixing device includes a fixing rotator and a pressure rotator pressed against a nip formation pad via the fixing rotator to form a fixing nip between the fixing rotator and the pressure rotator, through which a recording medium is conveyed. The nip formation pad includes an increased thermal conduction portion having an increased thermal conductivity and a decreased thermal conduction portion having a decreased thermal conductivity and being inboard from the increased thermal conduction portion in the axial direction of the fixing rotator. The increased thermal conduction portion is disposed opposite a non-conveyance span of the fixing rotator where the recording medium is not conveyed and includes an inboard edge inboard from a lateral edge of the recording medium toward a center of the recording medium in the axial direction of the fixing rotator by a predetermined first distance.

摘要翻译： 定影装置包括固定旋转器和经由固定旋转器压靠在压区形成垫上的压力旋转器，以在定影旋转器和压力旋转器之间形成定影夹持部，通过该定影辊隙传送记录介质。 压区形成垫包括具有增加的导热性的增加的热传导部分和具有降低的导热性的降低的热传导部分，并且在固定旋转体的轴向方向上从增加的热传导部分内侧。 增加的热传导部分与固定旋转器的非传送跨度相对，其中记录介质不被传送，并且包括从记录介质的侧边缘朝向记录介质的轴向方向的中心的内侧边缘 固定旋转器预定的第一距离。

公开(公告)号：US09329545B2

公开(公告)日：2016-05-03

申请号：US14467135

申请日：2014-08-25

申请人： Keitaro Shoji

发明人： Keitaro Shoji

IPC分类号： G03G15/20

CPC分类号： G03G15/2057 ,  G03G15/2053 ,  G03G2215/2035

摘要： A fixing device includes a fixing rotator and an opposed rotator disposed opposite the fixing rotator to form a fixing nip therebetween through which a recording medium bearing a toner image is conveyed. A heater disposed opposite the fixing rotator heats the fixing rotator. A nip formation pad disposed opposite an inner circumferential surface of the fixing rotator includes a decreased thermal conduction portion having a decreased thermal conductivity to conduct heat in a thickness direction of the nip formation pad perpendicular to an axial direction of the fixing rotator and an increased thermal conduction portion having an increased thermal conductivity to conduct heat in the thickness direction of the nip formation pad. The increased thermal conduction portion is disposed opposite an overheating span of the fixing rotator in the axial direction thereof where the fixing rotator is susceptible to overheating.

摘要翻译： 定影装置包括固定旋转器和与固定旋转体相对设置的相对旋转体，以在其间传送承载调色剂图像的记录介质的定影夹持部。 与定影旋转体相对设置的加热器加热定影旋转器。 与定影旋转体的内周面相对设置的辊隙形成垫包括具有降低的热传导率的减少的热传导部分，其在垂直于定影旋转体的轴向方向上在辊隙形成垫的厚度方向上传导热量，并且增加热量 导电部分具有增加的导热性，以在压区形成垫的厚度方向上传导热量。 增加的导热部分与定影旋转体的轴向方向上的定影旋转体的过热跨度相对设置，其中定影旋转体易于过热。