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公开(公告)号：US5169422A
公开(公告)日：1992-12-08
申请号：US683943
申请日：1991-04-11
IPC分类号： C03B23/043 , C03B37/018 , F23D99/00
CPC分类号： C03B23/043 , C03B37/01815 , C03B37/01876 , F23D91/02 , Y02P40/57
摘要： A glass tube (31) from which optical fiber is to be drawn is heated by a torch assembly comprising a plurality of nozzles (54--54) disposed on a carriage. In order to avoid contamination of the tube by particles of the torch assembly resulting from thermal degradation,the nozzles are disposed in a plane which is normal to an axis (36) of the tube with each nozzle axis inclined so that flame fronts associated with the nozzles are substantially closer to the tube than to the torch assembly. Reaction of materials which are flowed into the tube is enhanced by including a second row of nozzles (91--91) which are inclined within a plane which is inclined to the longitudinal axis of the tube. In order to collapse the tube into a rod, a muffle member (100) preferably is caused to be disposed about the tube with an opening in the periphery of the muffle member to allow portions of the gas flows to converge and to allow heat energy to be transferred from the flame fronts to the tube.
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公开(公告)号：US4971614A
公开(公告)日：1990-11-20
申请号：US251162
申请日：1988-09-29
IPC分类号： C03B37/018
CPC分类号： C03B37/01884
摘要： In one manufacture of a preform rod from which optical fiber is drawn, chemical materials are moved into a rotating preform tube to which is applied a moving zone of heat. Following a deposition mode, the tube is collapsed to provide the preform rod. Provisions must be made to supply the deposition materials from a rotating supply conduit into the rotating preform tube without leakage and without the ingress of contaminants while an end portion of the tube is gripped securely. This is accomplished by providing non-metallic ferrules about an end portion of the preform tube which are caused to be clamped against the end portion of the preform tube in sealing and gripping engagement therewith. Also, because of the differences in the coefficients of thermal expansion of the materials of the preform tube and of portions of the apparatus, and because of heat-induced creep of the ferrules, and of other portions of the apparatus, provisions are made to cause a sealing, gripping engagement of the ferrules with the preform tube to be maintained during the deposition and the collapse modes.
摘要翻译： 在拉制光纤的预制棒的一个制造中，化学材料被移动到旋转的预制管中，施加有运动的热区。 在沉积模式之后，管被折叠以提供预制棒。 必须做出规定，将沉积材料从旋转的供应管道提供到旋转的预制管中，而不会有泄漏，并且在管的端部被牢固地抓住时不会有污染物的进入。 这是通过在预成型管的端部周围设置非金属套圈来实现的，这些套圈被密封并夹紧在预成型管的端部上。 另外，由于预成型管的材料和装置的部件的热膨胀系数不同，并且由于套管的热引起的蠕变以及装置的其他部分的热膨胀系数的差异导致 套筒与预成型管的密封，夹紧接合，以在沉积和折叠模式期间保持。
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公开(公告)号：US4820322A
公开(公告)日：1989-04-11
申请号：US99441
申请日：1987-09-23
申请人： Jerry W. Baumgart , Anthony T. D'Annessa , Franz T. Geyling , William M. Flegal , Thomas J. Miller
发明人： Jerry W. Baumgart , Anthony T. D'Annessa , Franz T. Geyling , William M. Flegal , Thomas J. Miller
IPC分类号： C03B23/07 , C03B37/012 , C03B37/025
CPC分类号： C03B37/01248 , C03B23/076 , C03B37/01211 , C03B2205/08 , Y02P40/57
摘要： Method and apparatus are provided for overcladding a preform rod (22). The preform rod is aligned with and inserted into an overcladding tube (30). The outer diameter of the preform rod and the inner diameter of the tube are such that the clearance between the tube and the rod does not exceed a predetermined value. Successive increments of length of the tube and rod therein are subjected to a controlled zone of heat while the pressure inside the tube is maintained at a value which is substantially less than that outside the tube. This causes the tube to be collapsed onto the preform rod to provide an overclad preform and subsequently a drawn optical fiber in which the overcladding is substantially concentric with respect to the optical fiber core.
摘要翻译： 提供了用于包覆预成型棒（22）的方法和装置。 预成型棒与外包管（30）对准并插入到外包管（30）中。 预制棒的外径和管的内径使得管和杆之间的间隙不超过预定值。 其中管和杆的连续长度的增量经受受控的热区，而管内的压力保持在基本上小于管外的压力。 这导致管被折叠到预制棒上，以提供外包层预制件和随后的拉伸光纤，其中外包层相对于光纤芯基本上是同心的。
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