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1. 发明授权

US06652691B1 Seam stress release and protrusion elimination process 失效
标题翻译：接缝应力释放和突出消除过程
公开(公告)号：US06652691B1
公开(公告)日：2003-11-25
申请号：US09428932
申请日：1999-10-28
申请人： Robert C. U. Yu , Satchidanand Mishra , Richard L. Post , Anthony M. Horgan , Bing R. Hsieh , Edward F. Grabowski , Donald C. VonHoene , Stephen T. Avery , Scott J. Griffin , Edward A. Domm
发明人： Robert C. U. Yu , Satchidanand Mishra , Richard L. Post , Anthony M. Horgan , Bing R. Hsieh , Edward F. Grabowski , Donald C. VonHoene , Stephen T. Avery , Scott J. Griffin , Edward A. Domm
IPC分类号： B29C6514
CPC分类号： B29C66/03241 , B29C65/1619 , B29C65/1654 , B29C65/1696 , B29C65/18 , B29C65/305 , B29C65/7847 , B29C66/0342 , B29C66/1122 , B29C66/1282 , B29C66/12841 , B29C66/3262 , B29C66/4322 , B29C66/4324 , B29C66/49 , B29C66/71 , B29C66/723 , B29C66/73711 , B29C66/73713 , B29C66/73921 , B29C66/81423 , B29C66/8161 , B29C66/8221 , B29C66/8227 , B29C66/8362 , B29C66/91216 , B29C66/91221 , B29C66/9131 , B29C66/91411 , B29C66/91421 , B29C66/91431 , B29C66/9161 , B29C71/02 , B29C2071/022 , B29L2009/00 , B29L2009/005 , B29L2009/008 , B29L2031/709 , B29L2031/764 , F16G3/10 , G03G5/10 , B29K2067/00
摘要： A process for providing an improved imaging member belt having a welded seam which exhibits greater resistance to dynamic fatigue induced seam cracking and delamination. An apparatus for achieving stress relaxation and eliminating protrusions in the seam region is also disclosed.
摘要翻译：一种用于提供具有焊缝的改进的成像构件带的方法，其显示出对动态疲劳引起的接缝开裂和分层的更大阻力。还公开了一种用于实现应力松弛并消除接缝区域中的突起的装置。

2. 发明授权

US06328922B1 Process for post treatment of a flexible imaging member belt 失效
标题翻译：用于后处理柔性成像构件带的方法
公开(公告)号：US06328922B1
公开(公告)日：2001-12-11
申请号：US09429148
申请日：1999-10-28
申请人： Satchidanand Mishra , Robert C. U. Yu , Anthony M. Horgan , Bing R. Hsieh , Donald C. VonHoene , Edward F. Grabowski , Richard L. Post , Edward A. Domm
发明人： Satchidanand Mishra , Robert C. U. Yu , Anthony M. Horgan , Bing R. Hsieh , Donald C. VonHoene , Edward F. Grabowski , Richard L. Post , Edward A. Domm
IPC分类号： B29C4322
CPC分类号： B29C66/03241 , B29C37/04 , B29C65/08 , B29C65/18 , B29C65/224 , B29C65/305 , B29C65/7847 , B29C66/1122 , B29C66/1282 , B29C66/12841 , B29C66/4322 , B29C66/4324 , B29C66/49 , B29C66/71 , B29C66/723 , B29C66/7392 , B29C66/73921 , B29C66/81265 , B29C66/8161 , B29C66/818 , B29C66/8181 , B29C66/8248 , B29C66/8322 , B29C66/8362 , B29C66/91411 , B29C66/919 , B29C66/91943 , B29C66/92431 , B29C66/929 , B29C66/93431 , B29C66/939 , B29C66/954 , B29L2009/00 , B29L2029/00 , B29L2031/709 , B29L2031/764 , G03G5/005 , Y10S425/055 , B29C65/00 , B29K2069/00
摘要： A process for post treatment of an imaging member belt including providing a support member having a smooth flat surface, providing a flexible belt having a welded seam, supporting the inner surface of the seam on the smooth flat surface, contacting the seam with a heated surface, heating the seam region with the heated surface to raise the temperature in the seam region to a temperature of from about 2° C. to 20° C. above the Tg of the thermoplastic polymer material, and compressing the seam with the heated surface with sufficient compression pressure to smooth out the seam.
摘要翻译：一种用于后处理成像构件带的方法，包括提供具有光滑平坦表面的支撑构件，提供具有焊缝的柔性带，在平滑平坦表面上支撑接缝的内表面，使接缝与加热表面接触，用加热的表面加热接缝区域，以将接缝区域中的温度升高到高于热塑性聚合物材料的Tg的约2℃至20℃的温度，并且用加压的表面以足够的压缩压缩接缝压平缝线。

3. 发明授权

US07094048B2 Flexible imaging member belt seam smoothing method 失效
标题翻译：柔性成像构件带接缝平滑方法
公开(公告)号：US07094048B2
公开(公告)日：2006-08-22
申请号：US09892009
申请日：2001-06-26
申请人： Satchidanand Mishra , Robert C. U. Yu , Anthony M. Horgan , Bing R. Hsieh , Donald C. VonHoene , Edward F. Grabowski , Richard L. Post , Edward A. Domm
发明人： Satchidanand Mishra , Robert C. U. Yu , Anthony M. Horgan , Bing R. Hsieh , Donald C. VonHoene , Edward F. Grabowski , Richard L. Post , Edward A. Domm
IPC分类号： B29C65/02 , B29C65/12 , B29C65/18
CPC分类号： B29C66/03241 , B29C37/04 , B29C65/08 , B29C65/18 , B29C65/224 , B29C65/305 , B29C65/7847 , B29C66/1122 , B29C66/1282 , B29C66/12841 , B29C66/4322 , B29C66/4324 , B29C66/49 , B29C66/71 , B29C66/723 , B29C66/7392 , B29C66/73921 , B29C66/81265 , B29C66/8161 , B29C66/818 , B29C66/8181 , B29C66/8248 , B29C66/8322 , B29C66/8362 , B29C66/91411 , B29C66/919 , B29C66/91943 , B29C66/92431 , B29C66/929 , B29C66/93431 , B29C66/939 , B29C66/954 , B29L2009/00 , B29L2029/00 , B29L2031/709 , B29L2031/764 , G03G5/005 , Y10S425/055 , B29C65/00 , B29K2069/00
摘要： Apparatus comprising a support member having a flat surface adapted to receive and support a seam region of a flexible belt comprising thermoplastic polymer material having a predetermined glass transition temperature, a heatable member having a smooth heatable flat surface for compressing at least a portion of the seam region of a flexible belt placed on the smooth flat surface of the support member to heat the portion to at least the glass transition temperature of the thermoplastic polymer material, the smooth surface of the heatable member having a profile which is parallel to the smooth flat surface of the support member, and wherein the heatable flat surface comprises a low surface energy or abhesive material.
摘要翻译：一种装置，包括具有平坦表面的支撑构件，该平坦表面适于接收和支撑包含具有预定玻璃化转变温度的热塑性聚合物材料的柔性带的接缝区域，具有平滑可加热平坦表面的可加热构件，用于压缩接缝的至少一部分位于支撑构件的平滑平坦表面上的柔性带的区域，以将该部分加热至至少热塑性聚合物材料的玻璃化转变温度，可加热构件的光滑表面具有平行于光滑平坦表面的轮廓并且其中所述可加热平坦表面包括低表面能或粘合材料。

4. 发明授权

US6117603A Electrostatographic imaging member having an improved imaging layer 有权
标题翻译：具有改进的成像层的静电成像构件
公开(公告)号：US6117603A
公开(公告)日：2000-09-12
申请号：US362531
申请日：1999-07-28
申请人： Robert C. U. Yu , Richard L. Post , Satchidanand Mishra , Donald C. VonHoene , Anthony M. Horgan , Bing R. Hsieh , Edward F. Grabowski , Kathleen M. Carmichael , Huoy-Jen Yuh , John S. Chambers
发明人： Robert C. U. Yu , Richard L. Post , Satchidanand Mishra , Donald C. VonHoene , Anthony M. Horgan , Bing R. Hsieh , Edward F. Grabowski , Kathleen M. Carmichael , Huoy-Jen Yuh , John S. Chambers
IPC分类号： G03G5/147 , C08K3/00 , C08L83/06 , C08L83/10 , C08L83/12 , C08L101/00 , G03G5/05 , G03G15/02
CPC分类号： G03G5/0567 , G03G5/0564 , G03G5/0578
摘要： An electrostatographic imaging member includinga supporting substrate having an electrically conductive outer surface andat least one layer having an exposed imaging surface, the layer including a continuous matrix comprising a film forming polymer and a surface energy lowering liquid polysiloxane represented by the formula: ##STR1## wherein x and y are independently selected integers between about 5 and about 500,n is a number between 0 and 10, andR.sub.1 is selected from the group consisting of: ##STR2## wherein z is number between about 1 and about 30,R.sub.2 and R.sub.3 are independently selected from alkylene groups containing from 1 to 10 carbon atoms, andR.sub.4 is a hydrogen atom or an alkyl group containing 1 to 3 carbon atoms.
摘要翻译：一种静电摄影成像构件，包括具有导电外表面的支撑衬底和具有暴露成像表面的至少一个层，所述层包括由下式表示的成膜聚合物和表面能降低液体聚硅氧烷的连续基质：其中x 并且y独立地选自约5至约500之间的整数，n是0至10之间的数，并且R 1选自：其中z在约1至约30之间，R2和R3独立地选自含有1至10个碳原子的亚烷基，R 4是氢原子或含1至3个碳原子的烷基。

5. 发明授权

US6071661A Imaging member containing branched polycarbonate 有权
标题翻译：包含支链聚碳酸酯的成像构件
公开(公告)号：US6071661A
公开(公告)日：2000-06-06
申请号：US342389
申请日：1999-06-29
申请人： Bing R. Hsieh , Satchidanand Mishra , Anthony M. Horgan , Richard L. Post , Robert C. U. Yu , Donald C. VonHoene , Edward F. Grabowski , Kathleen M. Carmichael
发明人： Bing R. Hsieh , Satchidanand Mishra , Anthony M. Horgan , Richard L. Post , Robert C. U. Yu , Donald C. VonHoene , Edward F. Grabowski , Kathleen M. Carmichael
IPC分类号： G03G15/04
CPC分类号： G03G5/14756 , G03G5/142 , G03G2215/00957 , Y10S430/131
摘要： An imaging member including: (a) a substrate layer; (b) an imaging layer; and (c) an abrasion resistant layer selected from the group consisting of an overcoating layer and an anti-curl layer, wherein the abrasion resistant layer includes a branched polycarbonate.
摘要翻译：一种成像构件，包括：（a）基底层; （b）成像层; 和（c）选自外涂层和抗卷曲层的耐磨层，其中耐磨层包括支化聚碳酸酯。

6. 发明授权

US6068722A Seam stress release in flexible electrostatographic imaging belts 失效
标题翻译：柔性静电成像带缝合应力释放
公开(公告)号：US6068722A
公开(公告)日：2000-05-30
申请号：US4289
申请日：1998-01-08
申请人： Robert C. U. Yu , Karl V. Thomsen , Richard L. Post , Anthony M. Horgan , Satchidanand Mishra , Bing R. Hsieh , Edward F. Grabowski , Donald C. VonHoene , Michael S. Roetker , Leonard F. Quinn , John J. Darcy, III , Barbara D. Ceglinski
发明人： Robert C. U. Yu , Karl V. Thomsen , Richard L. Post , Anthony M. Horgan , Satchidanand Mishra , Bing R. Hsieh , Edward F. Grabowski , Donald C. VonHoene , Michael S. Roetker , Leonard F. Quinn , John J. Darcy, III , Barbara D. Ceglinski
IPC分类号： G03G21/00 , B29C35/08 , B29C65/00 , B29C65/08 , B29C65/14 , F16G3/10 , G03G5/02 , G03G5/00
CPC分类号： B29C66/836 , B29C65/14 , B29C65/1412 , B29C65/1454 , B29C65/7847 , B29C66/034 , B29C66/1122 , B29C66/343 , B29C66/4322 , B29C66/4324 , B29C66/49 , B29C66/723 , B29C66/73921 , B29C66/91216 , B29C66/91221 , B29C66/91411 , B29C66/91431 , B29C66/91641 , B29C66/961 , B29C66/962 , B29C2035/0822 , B29C65/08 , B29C66/0342 , B29C66/1282 , B29C66/12841 , B29C66/71 , B29C66/73711 , B29C66/73713 , B29L2009/00 , B29L2031/709 , B29L2031/764
摘要： A process for treating a seamed flexible electrostatographic imaging belt including providing an imaging belt including at least one layer including a thermoplastic polymer matrix and a seam extending from one edge of the belt to the other, providing an elongated support member having a arcuate supporting surface and mass, the arcuate surface having at least a substantially semicircular cross section having a radius of curvature of between about 9.5 millimeters and about 50 millimeters, supporting the seam on the arcuate surface with the region of the belt adjacent each side of the seam conforming to the arcuate supporting surface of the support member with a wrap angle at least sufficiently enough to provide arcuate support for the seam area, traversing the seam from one edge of the belt to the other with infrared rays from a tungsten halogen quartz bulb focused with a reflector having a hemiellipsoid shape to form a heated substantially circular spot straddling the seam during traverse, the spot having a diameter of between about 3 millimeters and about 25 millimeters, without exceeding the breadth of supported arcuate seam area, to substantially instantaneously heat the thermoplastic polymer matrix in the seam and the region of the belt adjacent each side of the seam directly under the heating spot to at least the glass transition temperature of the polymer matrix without significantly heating the support member, and rapidly quenching the seam by thermal conduction of heat from the seam to the mass of the support member to a temperature below the glass transition temperature of the polymer matrix while the region of the belt adjacent each side of the seam conforms to the arcuate supporting surface of the support member. Apparatus for carrying out this process is also disclosed.
摘要翻译：一种用于处理缝合的柔性静电摄影成像带的方法，包括提供包括至少一层包括热塑性聚合物基质和从所述带的一个边缘延伸到另一边缘的接缝的成像带，提供具有弓形支撑表面的细长支撑构件，所述弧形表面具有至少基本上半圆形的横截面，其曲率半径在约9.5毫米至约50毫米之间，支撑所述弧形表面上的接缝，所述带的区域邻近所述接缝的每一侧，支撑构件的弧形支撑表面具有至少足够足以能够为接缝区域提供弧形支撑的包角，从而从带的一个边缘到另一个边缘的红外线与来自与具有半透明形状，以在横切过程中形成跨接缝的加热的基本圆形的斑点 se，直径在约3毫米至约25毫米之间的点，不超过支撑弧形接缝面积的宽度，基本上瞬时加热接缝中的热塑性聚合物基体和邻近接缝每一侧的带的区域直接在加热点下至少达到聚合物基体的玻璃化转变温度，而不会显着加热支撑构件，并且通过将热量从接缝热导至支撑构件的质量而将接缝快速骤冷至低于玻璃化转变温度邻近接缝的每一侧的带的区域与支撑构件的弓形支撑表面一致的聚合物基体的温度。还公开了用于执行该过程的装置。

7. 发明授权

US5885512A Method of treating preformed flexible imaging belts to form ripple-free and dimensionally precise belts 失效
标题翻译：处理预成型柔性成像带以形成无波纹和尺寸精确的带的方法
公开(公告)号：US5885512A
公开(公告)日：1999-03-23
申请号：US941914
申请日：1997-10-01
申请人： Robert C. U. Yu , Donald C. VonHoene , Anthony M. Horgan , Richard L. Post , Satchidanand Mishra , Edward F. Grabowski , Bing R. Hsieh
发明人： Robert C. U. Yu , Donald C. VonHoene , Anthony M. Horgan , Richard L. Post , Satchidanand Mishra , Edward F. Grabowski , Bing R. Hsieh
IPC分类号： G03G5/10 , B29C31/00 , B29C63/20 , B29C71/02 , B29C55/24 , B29C61/02
CPC分类号： B29C71/02 , B29C31/002 , B29C63/20 , B29C2071/022 , B29L2009/00 , B29L2009/008 , B29L2031/709 , B29L2031/764
摘要： A method of treating a preformed flexible imaging belt including providing a rigid cylindrical support drum having a precisely predetermined outer circumference, a first end and a second end, providing a preformed flexible electrostatographic imaging belt, circumferentially expanding the belt with a flowing fluid under pressure until the circumference of the inner surface of the belt adjacent the first end of the drum is stretched to a new dimension of at least about 0.1 percent greater than the outer circumference of the rigid support drum while maintaining the belt below the elastic limit of the belt to smooth out physical defects, sliding the belt onto the drum from the first end toward the second end until substantially all of the belt encircles the outer surface of the drum, terminating the flow of the flowing fluid to allow the belt to contract onto the outer surface of the support drum, heating the belt to a treatment temperature of between about the glass transition temperature and about 10.degree. C. above the glass transition temperature of the substrate or the imaging layer, the treatment temperature being the higher of these two glass transition temperatures, until the belt relaxes onto the outer circumference of the rigid drum and is substantially free of any tendency to contract back to the original circumference of the inner exposed surface prior to circumferentially expanding the belt, cooling the belt to ambient room temperature, and removing the belt from the drum, the belt having a new inner circumference substantially identical to the precisely predetermined outer circumference of the rigid cylindrical support drum.
摘要翻译：一种处理预成型的柔性成像带的方法，包括提供具有精确预定的外周的刚性圆柱形支撑滚筒，第一端和第二端，提供预成型的柔性静电成像带，在压力下使流体流体周向地膨胀带直到与滚筒的第一端相邻的带的内表面的圆周被拉伸到比刚性支撑滚筒的外圆周大至少约0.1％的新尺寸，同时将带保持在带的弹性极限以下平滑物理缺陷，将带从第一端向第二端滑动到鼓上，直到基本上所有的带环绕滚筒的外表面，终止流动流体的流动，以使带收缩到外表面的支撑鼓，将带加热到约玻璃化转变温度之间的处理温度并且高于基底或成像层的玻璃化转变温度约10℃，处理温度高于这两个玻璃化转变温度，直到带松弛到刚性滚筒的外圆周上并且基本上没有任何在带周向膨胀之前收缩到内部暴露表面的原始圆周的趋势，将带冷却到环境室温，并且将带从滚筒中移除，带具有与精确预定外部基本相同的新内周刚性圆柱形支撑滚筒的周长。

8. 发明授权

US07150950B2 Photosensitive member having ground strip with lignin sulfonic acid doped polyaniline 有权
标题翻译：具有木质素磺酸掺杂聚苯胺的接地条的感光构件
公开(公告)号：US07150950B2
公开(公告)日：2006-12-19
申请号：US10824794
申请日：2004-04-14
申请人： Robert C. U. Yu , Satchidanand Mishra , Anthony M. Horgan , Richard L. Post , Edward F. Grabowski , Kathleen M. Carmichael , Satish Parikh , Bing R. Hsieh , Donald C. VonHoene
发明人： Robert C. U. Yu , Satchidanand Mishra , Anthony M. Horgan , Richard L. Post , Edward F. Grabowski , Kathleen M. Carmichael , Satish Parikh , Bing R. Hsieh , Donald C. VonHoene
IPC分类号： G03G5/00
CPC分类号： G03G5/105 , G03G5/107 , G03G5/108
摘要： An electrostatographic imaging member having a flexible supporting substrate, an imaging layer capable of retaining an electrostatic latent image, and an electrically conductive ground strip layer comprising a film forming binder and a lignin sulfonic acid doped polyaniline dispersion, and an image forming apparatus with the above imaging member to receive an electrostatic latent image on a charge-retentive surface of the imaging member; a development component to apply toner to the charge-retentive surface to develop the electrostatic latent image to form a developed toner image on the charge-retentive surface; a transfer component to transfer the developed toner image from the charge-retentive surface to a receiving copy substrate; and a fixing component to fuse the developed image to the receiving copy substrate.
摘要翻译：具有柔性支撑基板的静电成像构件，能够保持静电潜像的成像层和包含成膜粘合剂和木质素磺酸掺杂的聚苯胺分散体的导电接地带层，以及具有上述的成像装置成像构件，以在所述成像构件的电荷保持性表面上接收静电潜像; 显影部件，用于将调色剂施加到电荷保持表面以显影静电潜像，以在电荷保持性表面上形成显影的调色剂图像; 转印组分，用于将显影的调色剂图像从电荷保持表面转移到接收复制衬底; 以及将显影图像融合到接收复印基板的固定部件。

9. 发明授权

US6056839A Rapid electrostatographic belt treatment system 失效
标题翻译：快速静电胶带处理系统
公开(公告)号：US6056839A
公开(公告)日：2000-05-02
申请号：US4290
申请日：1998-01-08
申请人： Robert C. U. Yu , Satchidanand Mishra , Anthony M. Horgan , Richard L. Post , Donald C. VonHoene , Edward F. Grabowski , Bing R. Hsieh
发明人： Robert C. U. Yu , Satchidanand Mishra , Anthony M. Horgan , Richard L. Post , Donald C. VonHoene , Edward F. Grabowski , Bing R. Hsieh
IPC分类号： G03G21/00 , B32B1/04 , F16G3/10 , G03G5/02 , G03G5/05 , G03G15/00 , G03G15/16
CPC分类号： B32B1/04 , F16G3/10 , G03G15/00 , G03G15/16 , G03G21/00 , G03G5/02 , G03G5/05 , B29L2009/00 , B29L2031/709 , B29L2031/765
摘要： A process for treating a seamed flexible electrostatographic imaging belt including providing an imaging belt including at least one imaging layer including a thermoplastic polymer matrix and a seam extending from one edge of the belt to the other, the seam having a region on the belt adjacent each side of the seam and also having an exposed surface on each side of the belt, supporting the belt with at least one vacuum holding device spaced from the seam while maintaining the seam and region of the belt adjacent each side of the seam in an arcuate shape having at least a substantially semicircular cross section having a radius of curvature of between about 9.5 millimeters and about 50 millimeters, heating the thermoplastic polymer matrix of the imaging layer in the seam and the region of the belt adjacent each side of the seam to at least the glass transition temperature (Tg) of the thermoplastic polymer matrix without significantly heating the support member, and contacting the exposed surface of the seam and regions on each side of the belt with a gas to rapidly cool the seam and regions on each side of the belt to a temperature below the glass transition temperature of the polymer matrix while maintaining the arcuate shape of the region of the belt adjacent each side of the seam. Apparatus for carrying out this process is also disclosed.
摘要翻译：一种用于处理缝合的柔性静电摄影成像带的方法，包括提供包括至少一个包含热塑性聚合物基体的成像层和从所述带的一个边缘延伸到另一个边缘的接缝的成像带，所述接缝具有与所述带相邻的带并且还具有在带的每一侧上的暴露表面，用至少一个与接缝隔开的真空保持装置支撑带，同时将接缝和接缝的每一侧的区域保持为弧形形状具有至少具有约9.5毫米至约50毫米的曲率半径的基本上半圆形的横截面，将接缝中的成像层的热塑性聚合物基体和邻近接缝的每一侧的带的区域加热至少所述热塑性聚合物基体的玻璃化转变温度（Tg），而不显着加热所述支撑构件，并使所述暴露物接触 d表面和具有气体的带的每一侧的区域，以将带和每侧的区域快速冷却到低于聚合物基体的玻璃化转变温度的温度，同时保持该区域的弧形形状皮带靠近接缝的每一侧。还公开了用于执行该过程的装置。

10. 发明授权

US5966572A Photoconductor belt seam detection 有权
标题翻译：感光带皮带检测
公开(公告)号：US5966572A
公开(公告)日：1999-10-12
申请号：US162196
申请日：1998-09-28
申请人： Satchidanand Mishra , Edward F. Grabowski , Bing R. Hsieh , Robert C. U. Yu , Anthony M. Horgan , Richard L. Post , Donald C. VonHoene
发明人： Satchidanand Mishra , Edward F. Grabowski , Bing R. Hsieh , Robert C. U. Yu , Anthony M. Horgan , Richard L. Post , Donald C. VonHoene
IPC分类号： G03G21/14 , G03G15/00
CPC分类号： G03G21/145
摘要： An electrophotographic printing machine that has a photoconductive belt with a skewed seam thereon. The position of the skewed seam is detected by a pair of seam detection devices. The seam detection devices are spaced from one another and adapted to transmit a pair of signals with the signals having a time interval therebetween. These signals are inputted to a detection circuit and, if the time interval between signals is within a preselected tolerance, the detection circuit generates a seam indication signal. In this way, scratches on the photoconductive surface may be discriminated from the seam.
摘要翻译：一种电子照相印刷机，其上具有带有倾斜接缝的感光带。倾斜缝的位置由一对接缝检测装置检测。接缝检测装置彼此间隔开并适于传输一对信号，其间具有时间间隔的信号。这些信号被输入到检测电路，并且如果信号之间的时间间隔在预选公差内，则检测电路产生接缝指示信号。以这种方式，可以从接缝上区分光导表面上的划痕。

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