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| Number | Title | Issue Date |
| 7946138 | Adjustable positioning apparatus for cooling members An apparatus for adjusting the cooling members located beneath fiberizing bushings is disclosed having the capability of moving each cooling member, or one portion of each cooling member, in a generally vertical direction, and/or in a lateral and/or tilting directio... | 05/24/2011 |
| 7168256 | Apparatus and method for recovery and recycle of optical fiber coolant gas An apparatus and method for recovering and recycling a coolant gas from a heat exchanger. The apparatus comprises a coolant gas recovery section, and analysis section, and a coolant gas blending section. The coolant gas recovery section recovers a coolant gas contai... | 01/30/2007 |
| 7153115 | Optical fiber cooling tube An optical fiber cooling tube includes an internal cavity through which an optical fiber passes and a set of injection passages that are distributed along the tube, open into the cavity, and are oriented in a contraflow direction relative to the direction in which t... | 12/26/2006 |
| 7137279 | Cap assembly and optical fiber cooling process A cap assembly for collecting cooling gas from a coolant chamber tube is disclosed. The cap assembly having connecting means and outlet means extending from its side walls being generally shaped and sized for detachable mounting on the body of the cooling gas chambe... | 11/21/2006 |
| 6935139 | Method of manufacturing optical fiber The method of manufacturing an optical fiber in accordance with the present invention comprises a step of yielding an optical fiber by drawing an optical fiber preform softened upon heating, wherein a temperature at which the optical fiber preform is softened is at ... | 08/30/2005 |
| 6845637 | Apparatus to improve degree of cure for ultraviolet curable optical fiber coating by actively removing heat from the coating during irradiation An apparatus and method for curing a coating applied to an optical fiber. A water-jacketed UV lamp is provided adjacent a first reflector. An optical fiber is drawn between a second reflector opposite the first reflector and at least one quartz plate, while a cross ... | 01/25/2005 |
| 6789400 | Cap assembly and optical fiber cooling process A cap assembly for collecting cooling gas from a coolant chamber tube is disclosed. The cap assembly having connecting means and outlet means extending from its side walls being generally shaped and sized for detachable mounting on the body of the cooling gas chambe... | 09/14/2004 |
| 6715323 | Method and apparatus for cooling optical fibers The present invention relates to a method and apparatus for cooling an optical fiber during the drawing process of said fiber. In particular the present method for cooling an optical fiber comprises flowing a cooling gas onto the optical fiber wherein the flo... | 04/06/2004 |
| 6648946 | Process for recovering helium using an eductor This invention is directed to a process for recovering helium. The process includes a) passing a first gas containing helium to an eductor to produce a second gas; b) passing the second gas through a heat exchanger to produce a third gas; and c) recoverin... | 11/18/2003 |
| 6644069 | Method of heating and processing an end of an optical fiber preform and apparatus for heating and processing an end of an optical fiber preform An end heating and processing method of an optical fiber preform. In this method, an optical fiber preform is processed by heating and melting an end of a vitrified optical fiber preform including a core portion and a cladding portion formed on an outer c... | 11/11/2003 |
| 6546758 | Multi-chamber fiber cooling apparatus A method and device for reducing the temperature of an optical fiber wherein a housing body is provided a plurality of inner cooling chambers which are-, partitioned from each other by a plurality of partition walls. An axial through hole extends through ... | 04/15/2003 |
| 6474109 | Device and method for drawing optical fibers from a preform The invention relates to a device for drawing optical fibers from a preform, comprising: a furnace comprising a tube for heating one end of said preform to the drawing temperature thereof, which tube comprises: i) a central tube, ii) an upper extension tube co... | 11/05/2002 |
| 6370920 | Apparatus to improve degree of cure for ultraviolet curable optical fiber coating by actively removing heat from the coating during irradiation An apparatus and method for curing a coating applied to an optical fiber. A water-jacketed UV lamp is provided adjacent a first reflector. An optical fiber is drawn between a second reflector opposite the first reflector and at least one quartz plate, whi... | 04/16/2002 |
| 6338259 | Cooling apparatus used in fabrication of optical fiber preform An apparatus and process for cooling a quartz tube used in fabrication of an optical fiber preform by modified chemical vapor deposition. The apparatus has a nozzle ring supplied with a coolant. The nozzle ring has at least two vent sections that are be s... | 01/15/2002 |
| 6321573 | Process and apparatus for manufacturing a porous SiO2 preform In a known process for the manufacture of an elongated porous SiO2 preform, SiO2 particles are deposited on the mantle surface of a cylindrical carrier rotating about its longitudinal axis. The SiO2 particles are formed by... | 11/27/2001 |
| 6314767 | Apparatus for manufacturing an optical fiber preform and including a ring for trapping and diffusing light radiation An apparatus and method for manufacturing an optical fiber preform from a tube of vitreous material. A holding device holds the tube during manufacture of the preform and a heater supplies the necessary heat energy for preform manufacturing. A diffuser is... | 11/13/2001 |
| 6279354 | Cooler of optical fiber draw tower A cooler of an optical fiber draw tower, situated below a melting furnace for melting a preform for an optical fiber, for cooling the optical fiber drawn from the preform melted in the melting furnace, includes at least one heat exchanger installed with a... | 08/28/2001 |
| 6253575 | Helium recycling for optical fiber manufacturing Helium recycling for optical fiber manufacturing in which consolidation process helium is recycled either directly for use in consolidation at high purity or recycled at lower purity adequate for usage in draw or other processes having a lower helium pari... | 07/03/2001 |
| 6189343 | Apparatus and method for forming an optical fiber An apparatus for forming a optical fiber which includes a furnace for softening an optical fiber blank; a tractor for drawing the optical fiber from the softened optical fiber blank; and a first applicator for applying a coating of a first coating materia... | 02/20/2001 |
| 6125638 | Optical fiber cooling process Hot optical fiber being drawn from a preform is cooled in a helium cooled heat exchanger by a two-stage process. In the first stage, in which the rate of draw of fiber through the heat exchanger is increased to the design draw rate, the rate of flow of he... | 10/03/2000 |
| 6109064 | Process for treating optical fibers by cryogenic tempering The transmission properties of an optical fiber are enhanced by cooling the fiber gradually to temperatures of at least -300° Fahrenheit, maintaining the fiber at such reduced temperature for a time suitable to stabilize the transmission properties of th... | 08/29/2000 |
| 5925164 | Finshield assemblies for fiber-forming apparatus A heat-absorbing finshield assembly, which is located adjacent the discharge area of a furnace for producing glass fibers, includes fins spaced along a fluid-cooled manifold such that the fins extend between, but not in contact with, the molten glass fibe... | 07/20/1999 |
| 5900037 | Method and apparatus for producing mineral wool The present invention furnishes a method for producing mineral wool wherein a molten mineral material is fed into a spinner (1) the peripheral wall (2) of which comprises a multiplicity of orifices with small diameters wherethrough the mineral molten mate... | 05/04/1999 |
| 5897681 | Method of drawing an optical fiber To draw an optical fiber (10) from one end of a glass preform (9) which is heated to above the glass softening temperature at least in that area, a gas (21) flows around the preform (9) into a furnace space (16) during the drawing process and subsequent f... | 04/27/1999 |
| 5897682 | Apparatus for cooling an optical fiber to be resin coated A coated optical fiber is produced by the steps of cooling through a cooling assembly an optical fiber obtained by drawing, heating and spinning an optical fiber base material and thereafter coating the optical fiber with a resin wherein a gas mixture inc... | 04/27/1999 |
| 5890376 | Helium recycling for optical fiber manufacturing Helium recycling for optical fiber manufacturing in which consolidation process helium is recycled either directly for use in consolidation at high purity or recycled at lower purity adequate for usage in draw or other processes having a lower helium pari... | 04/06/1999 |
| 5749933 | Apparatus and method for producing glass fibers In a method of making fibers in which molten glass is extruded through orifices in a bushing and cooled with cooling apparatus mounted below the bushing to form the fibers, it has been discovered that using new alloys containing a major amount of palladiu... | 05/12/1998 |
| 5637130 | Method and furnace for drawing optical fibers A furnace and method for drawing an optical fiber is provided. The furnace included a furnace core chamber in which a preform is inserted into the chamber through the upper end thereof and a drawn optical fiber is pulled out of the chamber through an open... | 06/10/1997 |
| 5452583 | Coolant recovery system A system and process for recovering high purity coolant gas from at least one fiber optic heat exchanger, characterized by controlling a flow of coolant gas into and out of the heat exchanger using a pressure, impurity and/or flow rate monitoring or trans... | 09/26/1995 |
| 5377491 | Coolant recovery process A system and process for recovering high purity coolant gas from at least one fiber optic heat exchanger, characterized by controlling a flow of coolant gas into and out of the heat exchanger using a pressure, impurity and/or flow rate monitoring or trans... | 01/03/1995 |
| 5366530 | Method and apparatus for fabricating an oval cross-sectional optical waveguide The invention concerns the method and apparatus to fabricate an oval cross-sectional optical waveguide which only allows light to propagate in one direction of polarization. The optical waveguide preform for such an optical waveguide according to the modi... | 11/22/1994 |
| 5346520 | Apparatus for applying a carbon coating to optical fibers A reactor for applying a carbon coating to an optical waveguide fiber wherein the buildup of reaction by-products within the reactor is reduced by providing internal and external fiber exit ports with the diameter of the internal fiber exit port being gre... | 09/13/1994 |
| 5338328 | Apparatus of manufacturing hermetic coating optical fiber A mass production method and apparatus of hermetic coating optical fiber where a bare fiber drawn from a preform is hermetically coated by CVD method in a reactor vessel, wherein a liquid flushes solid particles or by-products sticking to the reactor inne... | 08/16/1994 |
| 5174803 | Apparatus for heating glassy tubes A preform tube (31) is caused to be collpased into a preform rod by causing a heat zone (54) provided by a torch assembly (50) to traverse the tube longitudinally in a plurality of passes. During this so-called collapse mode, a muffle tube (100) encloses ... | 12/29/1992 |
| 5165940 | Spinneret High twist fibers are produced in a spin/quench/twist process directly from a modified spinneret. The spinneret consists of capillaries that are installed in highly elongated inserts which are surrounded by heat deflecting shields surrounded by an annular... | 11/24/1992 |
| 5106400 | Casting core/clad glass preforms method and apparatus Disclosed is a method of forming a glass preform from core and cladding glasses having low liquidus viscosities and narrow working ranges. A tube of liquid core glass is vertically situated in a vessel of liquid cladding glass. The tube extends to the bot... | 04/21/1992 |
| 5090978 | Methods of collapsing glass tube A preform tube (31) is caused to be collapsed into a preform rod by causing a heat zone (54) provided by a torch assembly (50) to traverse the tube longitudinally in a plurality of passes. During this collapse mode, a muffle tube (100) encloses that porti... | 02/25/1992 |
| 5043001 | Method and apparatus for fiber cooling A liquid cooling method and apparatus for rapid cooling of a hot glass fiber. In FIG. 1, an open ended liquid coolant container (12) is provided at its lower end with an inverted funnel surface (34). A vertically running, hot glass fiber (42) of indefinit... | 08/27/1991 |
| 4995892 | Process and apparatus for controlling the thermal environment of glass fiber forming The subject matter of this invention relates to an improved method for controlling an industrial glass fiber-forming process. More particularly, it involves a method for controlling the thermal environment of several fiber glass bushing assemblies by the ... | 02/26/1991 |
| 4966615 | Apparatus for cooling an optical fiber A method of and an apparatus for cooling an optical fibre drawn from a heated glass blank by passing the fibre (3) through a cooling pipe (9) in which a cooling gas (A) flows in the axial direction of the fibre around it. In order to reduce the consumptio... | 10/30/1990 |
