公开(公告)号：US20130195523A1

公开(公告)日：2013-08-01

申请号：US13748969

申请日：2013-01-24

申请人： Kensuke YAMAJI ,  Masahiko SATOH ,  Masaaki YOSHIKAWA ,  Kenji ISHII ,  Hiroshi YOSHINAGA ,  Tadashi OGAWA ,  Takeshi UCHITANI ,  Hiromasa TAKAGI ,  Takuya SESHITA ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Takahiro IMADA ,  Hajime GOTOH ,  Takamasa HASE ,  Toshihiko SHIMOKAWA ,  Shuutaroh YUASA ,  Akira SUZUKI

发明人： Kensuke YAMAJI ,  Masahiko SATOH ,  Masaaki YOSHIKAWA ,  Kenji ISHII ,  Hiroshi YOSHINAGA ,  Tadashi OGAWA ,  Takeshi UCHITANI ,  Hiromasa TAKAGI ,  Takuya SESHITA ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Takahiro IMADA ,  Hajime GOTOH ,  Takamasa HASE ,  Toshihiko SHIMOKAWA ,  Shuutaroh YUASA ,  Akira SUZUKI

IPC分类号： G03G15/20

CPC分类号： G03G15/2075 ,  G03G15/2025 ,  G03G15/2053 ,  G03G2215/2035

摘要： A fixing device includes an endless flexible belt, an elongated stationary pad, a rotary pressure member, and a low-friction sheet. The endless flexible belt is looped into a generally cylindrical configuration extending in an axial direction thereof for rotation in a rotational, circumferential direction thereof. The elongated stationary pad is stationarily disposed inside the loop of the belt. The rotary pressure member is disposed parallel to the belt. The rotary pressure member presses against the stationary pad via the belt to form a nip therebetween, through which a recording medium is conveyed in a conveyance direction. The low-friction sheet of lubricant-impregnated material covers the stationary pad to supply a lubricant between the stationary pad and the belt across the nip. The low-friction sheet has one or more flow channels defined therein.

摘要翻译： 定影装置包括环形柔性带，细长固定垫，旋转压力构件和低摩擦片。 环形柔性带环绕成在其轴向方向上延伸的大致圆柱形构造，以在其旋转圆周方向上旋转。 细长的固定垫固定地设置在带的环内。 旋转压力构件平行于带设置。 旋转压力构件经由带压靠固定衬垫，以在其间形成辊隙，记录介质通过该辊隙沿传送方向传送。 润滑剂浸渍材料的低摩擦片覆盖固定垫，以在固定垫和带之间跨越辊隙提供润滑剂。 低摩擦片材具有限定在其中的一个或多个流动通道。

公开(公告)号：US20130195525A1

公开(公告)日：2013-08-01

申请号：US13751648

申请日：2013-01-28

申请人： Hiroshi YOSHINAGA ,  Masahiko SATOH ,  Masaaki YOSHIKAWA ,  Kenji ISHII ,  Tadashi OGAWA ,  Hiromasa TAKAGI ,  Naoki IWAYA ,  Takuya SESHITA ,  Takahiro IMADA ,  Hajime GOTOH ,  Akira SUZUKI ,  Teppei KAWATA ,  Toshihiko SHIMOKAWA ,  Arinobu YOSHIURA ,  Takamasa HASE ,  Takeshi UCHITANI ,  Shuutaroh YUASA ,  Kensuke YAMAJI

发明人： Hiroshi YOSHINAGA ,  Masahiko SATOH ,  Masaaki YOSHIKAWA ,  Kenji ISHII ,  Tadashi OGAWA ,  Hiromasa TAKAGI ,  Naoki IWAYA ,  Takuya SESHITA ,  Takahiro IMADA ,  Hajime GOTOH ,  Akira SUZUKI ,  Teppei KAWATA ,  Toshihiko SHIMOKAWA ,  Arinobu YOSHIURA ,  Takamasa HASE ,  Takeshi UCHITANI ,  Shuutaroh YUASA ,  Kensuke YAMAJI

IPC分类号： G03G15/20

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

摘要： A fixing device includes: a rotatable endless fixing belt; a nip forming member arranged inside the fixing belt; a facing rotating body that abuts the nip forming member via the fixing belt to form a nip portion with the fixing belt; a heat source that directly heats up the fixing belt at a portion other than the nip portion; and a supporting member that supports the nip forming member. The fixing device conveys a recording medium carrying an unfixed image to the nip portion to fix the unfixed image to the recording medium, and the supporting member includes a rising portion extending in an abutting direction of the facing rotating body against the fixing belt and having a tip close to an inner circumferential surface of the fixing belt, and is set to have a section modulus of 200 mm3 or higher.

摘要翻译： 定影装置包括：可旋转的环形定影带; 布置在定影带内的辊隙形成构件; 面向旋转体，其经由定影带邻接辊隙形成构件以与定影带形成咬合部; 在夹持部以外的部分直接加热定影带的热源; 以及支撑所述辊隙形成构件的支撑构件。 定影装置将携带未定影图像的记录介质传送到夹持部分，以将未定影图像固定到记录介质上，并且支撑构件包括沿相对的旋转体抵靠定影带的邻接方向延伸的上升部分，并且具有 尖端靠近定影带的内圆周表面，并且被设定为具有200mm 3或更高的截面模数。

公开(公告)号：US20130189008A1

公开(公告)日：2013-07-25

申请号：US13746691

申请日：2013-01-22

申请人： Kenji ISHII ,  Masahiko SATOH ,  Masaaki YOSHIKAWA ,  Hiroshi YOSHINAGA ,  Takeshi UCHITANI ,  Tadashi OGAWA ,  Hiromasa TAKAGI ,  Naoki IWAYA ,  Takuya SESHITA ,  Takahiro IMADA ,  Hajime GOTOH ,  Takamasa HASE ,  Kazuya SAITO ,  Toshihiko SHIMOKAWA ,  Shuutaroh YUASA ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Akira SUZUKI

发明人： Kenji ISHII ,  Masahiko SATOH ,  Masaaki YOSHIKAWA ,  Hiroshi YOSHINAGA ,  Takeshi UCHITANI ,  Tadashi OGAWA ,  Hiromasa TAKAGI ,  Naoki IWAYA ,  Takuya SESHITA ,  Takahiro IMADA ,  Hajime GOTOH ,  Takamasa HASE ,  Kazuya SAITO ,  Toshihiko SHIMOKAWA ,  Shuutaroh YUASA ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Akira SUZUKI

IPC分类号： G03G15/20

CPC分类号： G03G15/2025 ,  B65G45/02 ,  G03G15/2053 ,  G03G2215/2035

摘要： A fixing device includes an endless flexible belt, a stationary pad, a rotary pressure member, and a lubrication mechanism. The endless flexible belt is looped into a generally cylindrical configuration extending in an axial direction thereof for rotation in a rotational, circumferential direction thereof. The stationary pad is stationarily disposed inside the loop of the belt. The rotary pressure member is disposed parallel to the belt. The rotary pressure member presses against the stationary pad via the belt to form a nip therebetween, through which a recording medium is conveyed in a conveyance direction. The lubrication mechanism supplies lubricant between the stationary pad and the belt, and includes a first sheet of lubricant-impregnated material and a second sheet of lubricant-impregnated material.

摘要翻译： 固定装置包括环形柔性带，固定垫，旋转压力构件和润滑机构。 环形柔性带环绕成在其轴向方向上延伸的大致圆柱形构造，以在其旋转圆周方向上旋转。 固定垫固定地设置在带的环内。 旋转压力构件平行于带设置。 旋转压力构件经由带压靠固定衬垫，以在其间形成辊隙，记录介质通过该辊隙沿传送方向传送。 润滑机构在固定垫和带之间提供润滑剂，并且包括润滑剂浸渍材料的第一片和润滑剂浸渍材料的第二片。

公开(公告)号：US20150234329A1

公开(公告)日：2015-08-20

申请号：US14703508

申请日：2015-05-04

申请人： Takamasa HASE ,  Kenji ISHII ,  Tadashi OGAWA ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Takeshi UCHITANI ,  Shuutaroh YUASA ,  Masaaki YOSHIKAWA ,  Hiroshi YOSHINAGA ,  Hiromasa TAKAGI ,  Naoki IWAYA ,  Takahiro IMADA ,  Hajime GOTOH ,  Takuya SESHITA ,  Ryota YAMASHINA ,  Yasunori ISHIGAYA

发明人： Takamasa HASE ,  Kenji ISHII ,  Tadashi OGAWA ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Takeshi UCHITANI ,  Shuutaroh YUASA ,  Masaaki YOSHIKAWA ,  Hiroshi YOSHINAGA ,  Hiromasa TAKAGI ,  Naoki IWAYA ,  Takahiro IMADA ,  Hajime GOTOH ,  Takuya SESHITA ,  Ryota YAMASHINA ,  Yasunori ISHIGAYA

IPC分类号： G03G15/20

CPC分类号： G03G15/2039 ,  G03G15/205 ,  G03G15/80 ,  G03G2215/2035

摘要： According to an embodiment, provided is a fixing device that includes: a rotatable fixing member that heats a recording medium on a side carrying an unfixed image; a rotatable pressing member that is pressed and is contacted with the fixing member to form a nip portion between the pressing member and the fixing member; a heat source heating the fixing member; a relay switch provided in an energizing path for the heat source; a temperature detection sensor detecting a temperature of the fixing member; and a control unit that controls energization of the heat source according to the temperature detected by the temperature detection sensor. The control unit keeps the relay switch in an off state if the temperature of the fixing member is equal to or more than a predetermined temperature when the fixing member has stopped rotation.

摘要翻译： 根据实施例，提供一种定影装置，其包括：可旋转的固定构件，其在承载未定影图像的一侧加热记录介质; 可旋转的按压构件，其被按压并与所述固定构件接触以在所述按压构件和所述固定构件之间形成夹持部; 加热所述固定构件的热源; 设置在所述热源的通电路径中的继电器开关; 检测所述固定部件的温度的温度检测传感器; 以及控制单元，其根据由温度检测传感器检测到的温度来控制热源的通电。 如果固定部件停止转动时，如果固定部件的温度等于或大于预定温度，则控制单元将继电器开关保持在关闭状态。

公开(公告)号：US20120121305A1

公开(公告)日：2012-05-17

申请号：US13293794

申请日：2011-11-10

申请人： Masaaki YOSHIKAWA ,  Yuji ARAI ,  Hiromasa TAKAGI ,  Yoshiki YAMAGUCHI ,  Arinobu YOSHIURA ,  Toshihiko SHIMOKAWA ,  Tetsuo TOKUDA ,  Yutaka IKEBUCHI ,  Kenji ISHII ,  Naoki IWAYA ,  Takahiro IMADA ,  Hiroshi YOSHINAGA ,  Takuya SESHITA ,  Hajime GOTOH ,  Ippei FUJIMOTO

发明人： Masaaki YOSHIKAWA ,  Yuji ARAI ,  Hiromasa TAKAGI ,  Yoshiki YAMAGUCHI ,  Arinobu YOSHIURA ,  Toshihiko SHIMOKAWA ,  Tetsuo TOKUDA ,  Yutaka IKEBUCHI ,  Kenji ISHII ,  Naoki IWAYA ,  Takahiro IMADA ,  Hiroshi YOSHINAGA ,  Takuya SESHITA ,  Hajime GOTOH ,  Ippei FUJIMOTO

IPC分类号： G03G15/20

CPC分类号： G03G15/2053 ,  G03G2215/2035

摘要： A fixing device includes a tubular belt holder, a rotatable, flexible fuser belt, a heater, a fuser pad, and a pressure member. The belt holder extends in an axial direction. The fuser belt is looped around the belt holder to rotate in a circumferential direction of the belt holder. The heater is disposed adjacent to the belt holder to heat the belt holder. The fuser pad is accommodated in the belt holder inside the loop of the fuser belt. The pressure member is disposed opposite the belt holder with the fuser belt interposed between the fuser pad and the pressure member. The pressure member presses in a load direction against the fuser pad through the fuser belt to form a fixing nip therebetween. The belt holder includes, along a circumferential dimension thereof, an upstream, first circumferential portion, a downstream, second circumferential portion, and a midstream, third circumferential portion.

摘要翻译： 定影装置包括管状带保持器，可旋转的柔性定影带，加热器，定影垫和压力构件。 皮带保持架沿轴向方向延伸。 定影带围绕带保持器环绕在带保持器的圆周方向上旋转。 加热器邻近带保持器设置以加热带保持器。 定影垫容纳在定影带环内的皮带保持架内。 压力构件与带保持器相对设置，定影带插入在定影垫和压力构件之间。 压力构件通过定影带在负载方向上压靠定影垫，以在它们之间形成定影辊隙。 带保持器沿其周向尺寸包括上游，第一周向部分，下游，第二圆周部分和中游第三圆周部分。

公开(公告)号：US20160004197A1

公开(公告)日：2016-01-07

申请号：US14851583

申请日：2015-09-11

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： According to an embodiments, a fixing device includes: an endless fixing member; a heating unit that is provided inside an inner peripheral surface of the fixing member; and a nip forming unit that comes into press-contact with a rotationally driven pressing member with the fixing member interposed therebetween to form a nip. The nip forming unit has a shape in which a center of a contact surface protrudes toward the pressing member compared to both ends. The nip forming unit has a protruding amount at a center toward the pressing member compared to both ends of the nip forming unit in no-load state is set to be less than a bent amount of the nip forming unit when the nip forming unit comes into press-contact with the pressing member with the fixing member interposed therebetween.

摘要翻译： 根据实施例，固定装置包括：环形固定构件; 加热单元，设置在所述固定构件的内周面的内侧; 以及辊隙形成单元，其与固定构件夹在其间的与旋转驱动的按压构件压力接触以形成辊隙。 辊隙形成单元具有与两端相比接触表面的中心朝向按压构件突出的形状。 压区形成单元在空载状态下与夹紧形成单元的两端相比，在朝向加压构件的中心处具有突出量设定为小于压区形成单元的弯曲量时 与固定构件夹在其间的按压构件压接。

公开(公告)号：US20120155935A1

公开(公告)日：2012-06-21

申请号：US13315581

申请日：2011-12-09

申请人： Masaaki YOSHIKAWA ,  Tetsuo TOKUDA ,  Yutaka IKEBUCHI ,  Takuya SESHITA ,  Hiroshi YOSHINAGA ,  Hajime GOTOH ,  Yoshiki YAMAGUCHI ,  Toshihiko SHIMOKAWA ,  Kenji ISHII ,  Takahiro IMADA ,  Naoki IWAYA ,  Yuji ARAI ,  Arinobu YOSHIURA ,  Hiromasa TAKAGI ,  Ippei FUJIMOTO

发明人： Masaaki YOSHIKAWA ,  Tetsuo TOKUDA ,  Yutaka IKEBUCHI ,  Takuya SESHITA ,  Hiroshi YOSHINAGA ,  Hajime GOTOH ,  Yoshiki YAMAGUCHI ,  Toshihiko SHIMOKAWA ,  Kenji ISHII ,  Takahiro IMADA ,  Naoki IWAYA ,  Yuji ARAI ,  Arinobu YOSHIURA ,  Hiromasa TAKAGI ,  Ippei FUJIMOTO

IPC分类号： G03G15/20

CPC分类号： G03G15/2053 ,  G03G2215/2035

摘要： A fixing device, including a fixing member; a pressure member; a nip forming member; a reinforcing member; a heating member; and a flange member including a cylinder inserted in an inner circumference at an edge of the fixing member in an axial direction thereof and a flange fixed on a frame of the fixing device, wherein the cylinder of the flange member includes a notch storing the nip forming member at a part on the circumference, has an arc-shaped outer circumferential cross-section at an area corresponding to an area where the fixing member is heated by the heating member, having a predetermined radius equivalent to a radius of the fixing member, and the arc has a center located at an upstream side in a recording medium feeding direction relative to a center line of the nip forming member in the recording medium feeding direction.

摘要翻译： 一种固定装置，包括固定构件; 压力构件; 辊隙形成构件; 加强件; 加热构件; 以及凸缘构件，其包括在固定构件的轴向方向上的内周中插入的气缸和固定在所述定影装置的框架上的凸缘，所述凸缘构件的气缸包括存储所述辊隙成形 在圆周上的一部分上的部件在对应于固定部件被加热部件加热的区域的区域上具有弧形的外周横截面，其具有等于固定部件的半径的预定半径，以及 电弧具有位于记录介质供给方向上相对于夹持形成部件的中心线的记录介质输送方向上游侧的中心。

公开(公告)号：US20130236225A1

公开(公告)日：2013-09-12

申请号：US13771467

申请日：2013-02-20

申请人： Tadashi OGAWA ,  Masaaki YOSHIKAWA ,  Kenji ISHII ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Yuji ARAI ,  Yoshiki YAMAGUCHI ,  Hiromasa TAKAGI ,  Naoki IWAYA ,  Takahiro IMADA ,  Hajime GOTOH ,  Akira SUZUKI

发明人： Tadashi OGAWA ,  Masaaki YOSHIKAWA ,  Kenji ISHII ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Yuji ARAI ,  Yoshiki YAMAGUCHI ,  Hiromasa TAKAGI ,  Naoki IWAYA ,  Takahiro IMADA ,  Hajime GOTOH ,  Akira SUZUKI

IPC分类号： G03G15/20

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

摘要： A fixing device includes an endless belt and a pressing body pressed against the endless belt to form a fixing nip therebetween through which a recording medium is conveyed. A separator contacts and separates the recording medium discharged from the fixing nip from the endless belt. The separator includes a center plate disposed opposite a center of the endless belt in an axial direction thereof to contact the recording medium and a lateral end plate disposed opposite each lateral end of the endless belt in the axial direction thereof and including a contact portion projecting beyond the center plate toward the endless belt and contacting the endless belt to produce a given interval between the center plate and the endless belt.

摘要翻译： 固定装置包括环形带和压靠在环形带上的压制构件，以在其间传送记录介质。 分离器将从定影辊隙排出的记录介质与环形带接触并分离。 分离器包括中心板，该中心板沿环形带的轴向方向相对于其轴向方向设置以接触记录介质;以及横向端板，其设置在环形带的轴向方向上与环形带的每个侧端相对，并且包括突出超过的接触部分 中心板朝向环形带并且接触环形带以在中心板和环形带之间产生给定的间隔。

公开(公告)号：US20130209139A1

公开(公告)日：2013-08-15

申请号：US13752679

申请日：2013-01-29

申请人： Tadashi OGAWA ,  Kenji ISHII ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Yuji ARAI ,  Yoshiki YAMAGUCHI ,  Hiromasa TAKAGI ,  Naoki IWAYA ,  Takahiro IMADA ,  Hajime GOTOH ,  Akira SUZUKI ,  Masaaki YOSHIKAWA

发明人： Tadashi OGAWA ,  Kenji ISHII ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Yuji ARAI ,  Yoshiki YAMAGUCHI ,  Hiromasa TAKAGI ,  Naoki IWAYA ,  Takahiro IMADA ,  Hajime GOTOH ,  Akira SUZUKI ,  Masaaki YOSHIKAWA

IPC分类号： G03G15/20

CPC分类号： G03G21/1685 ,  G03G15/2053 ,  G03G2215/2035

摘要： A fixing device capable of incorporating in an image forming apparatus includes a belt unit including a rotatable elastic endless belt having a sleeve shape without a driving shaft and a nip forming member disposed contactable against an inner surface of the endless belt, and a pressing member to form a nip contact portion through which a recording medium passes by pressing against the nip forming member via the endless belt. The endless belt is configured to be removable from the fixing device without contacting the endless belt.

摘要翻译： 能够结合在图像形成装置中的固定装置包括带单元，其包括具有套筒形状的旋转弹性环形带，而不具有驱动轴和可与环形带的内表面接触的夹持形成构件，以及按压构件 形成压区接触部分，记录介质通过环状带压靠在辊隙形成部件上而通过。 环形带被构造成可以从固定装置移除而不接触环形带。

公开(公告)号：US20140016971A1

公开(公告)日：2014-01-16

申请号：US13929920

申请日：2013-06-28

申请人： Yuji ARAI ,  Masaaki YOSHIKAWA ,  Kenji ISHII ,  Tadashi OGAWA ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Yoshiki YAMAGUCHI ,  Hiromasa TAKAGI ,  Naoki IWAYA ,  Takahiro IMADA ,  Hajime GOTOH ,  Akira SUZUKI

发明人： Yuji ARAI ,  Masaaki YOSHIKAWA ,  Kenji ISHII ,  Tadashi OGAWA ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Yoshiki YAMAGUCHI ,  Hiromasa TAKAGI ,  Naoki IWAYA ,  Takahiro IMADA ,  Hajime GOTOH ,  Akira SUZUKI

IPC分类号： G03G15/20

CPC分类号： G03G15/2053 ,  G03G15/206 ,  G03G15/2064 ,  G03G2215/2016 ,  G03G2215/2032 ,  G03G2215/2035

摘要： A fixing device includes a fixing rotary body rotatable in a given direction of rotation and a pressing rotary body pressed against the fixing rotary body to form a fixing nip therebetween through which a recording medium bearing a toner image is conveyed. A heater is disposed inside the fixing rotary body to heat the fixing rotary body. A reflector, disposed opposite an inner circumferential surface of the fixing rotary body via the heater, reflects light emitted from the heater onto the fixing rotary body. The reflector includes a movable portion movable relative to the heater to direct the light emitted from the heater onto a variable heating span of the fixing rotary body spanning in an axial direction thereof. The variable heating span varies depending on a width of the recording medium in the axial direction of the fixing rotary body.

摘要翻译： 定影装置包括可沿给定旋转方向旋转的定影旋转体和压靠在定影旋转体上的按压旋转体，以在其间传送承载调色剂图像的记录介质的定影夹持物。 定影旋转体内设有加热器，以加热定影旋转体。 经由加热器与定影旋转体的内周面相对设置的反射器将从加热器发射的光反射到定影旋转体上。 反射器包括可相对于加热器移动的可移动部分，以将从加热器发射的光引导到固定旋转体的沿其轴向方向的可变加热跨度。 可变加热跨度根据记录介质在固定旋转体的轴向上的宽度而变化。