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| Number | Title | Issue Date |
| 7320232 | Apparatus for fabricating holey optical fiber There is provided an apparatus and method for fabricating a holey optical fiber. An optical fiber with air holes of a predetermined size and shape along the length of the optical fiber is drawn by supplying nitrogen gas into air holes through one end of a holey opti... | 01/22/2008 |
| 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 |
| 7129606 | Vacuuming motor and vacuuming apparatus In a vacuuming motor used by being attached to a peripheral edge of a motor attaching hole provided at a vacuum chamber, an end portion on a load side of a motor main body is attached with a reduction gear main body having an attaching flange fixed to the motor atta... | 10/31/2006 |
| 6993937 | Preform inlet arrangement for an optical fiber drawing furnace, a furnace provided with that kind of inlet arrangement, and a preform equipped to co-operate with that inlet arrangement An inlet arrangement for inserting a preform (3′) into a furnace (1′) for drawing a fiber (2′). The furnace includes an enclosure (4′) at the top of which there are both an opening to allow insertion of a preform which moves in tr... | 02/07/2006 |
| 6945079 | Optical fiber drawing system for non-contact control of polarization mode dispersion of optical fiber Disclosed is a system for drawing an optical fiber for controlling polarization mode dispersion. A furnace is provided for uniformly heating an optical fiber preform in the drawing system mounted to an optical fiber draw tower. The furnace comprises: (a) a main body... | 09/20/2005 |
| 6920766 | Apparatus for producing synthetic quartz glass A synthetic quartz glass preform is produced by flame hydrolysis with subsequent cooling and is suitable for the application of high-energy DUV radiation in the wave length range under 250 nm. The preform has a core area which contains ≧1150 ppm OH, a strain doubl... | 07/26/2005 |
| 6901775 | Method and apparatus for providing a uniform coating thickness along an axial direction within a substrate tube A method and apparatus for providing a uniform coating thickness along an axial direction within an internal portion of a substrate tube is disclosed. A gas delivery unit is configured to coat the internal portion of the substrate tube. The gas delivery unit include... | 06/07/2005 |
| 6698240 | Apparatus for manufacturing glass base material and a method for manufacturing glass base material An apparatus for manufacturing a glass base material which is an parent material of an optical fiber, comprising: a tank which contains a raw material of the glass base material to vaporize the raw material to generate a raw material in gas phase; a tempe... | 03/02/2004 |
| 6584806 | Method and apparatus for manufacturing an optical fiber preform A method of manufacturing a preform, the method comprising rotating a primary preform about an axis X, establishing relative displacement in translation between the preform and a plasma torch, and introducing a glass powder into the plasma flame, the glas... | 07/01/2003 |
| 6543257 | Dehydration and sintering apparatus for porous optical fiber preform A porous optical fiber preform dehydration and sintering apparatus capable of improving the sealing performance between an upper lid and an elevating shaft and between the upper lid and a furnace tube or a furnace body, wherein an upper opening of a furna... | 04/08/2003 |
| 6519974 | Method for fabricating an optical fiber by simultaneous preform fusing and fiber drawing Disclosed is an apparatus for fabricating an optical fiber, which comprises a furnace for melting a sealed preform assembly to draw an uncoated optical fiber, a coater for coating the uncoated optical fiber, a capstan for drawing the optical fiber from th... | 02/18/2003 |
| 6516636 | Method for producing a tube made of quartz glass using low internal pressure and control of diameters In a known method for the manufacture of a tube made of a vitreous material, especially of quartz glass, a hollow cylindrical semifinished product made of a vitreous material is carried essentially vertically to a heating zone, wherein it is heated and dr... | 02/11/2003 |
| 6430967 | Pressure monitoring system using disposable seals A pressure monitoring system for use in monitoring gas pressure within a rotating tube has a chemical delivery tube which projects into the rotating tube and whose distal end is sealed to the interior wall of the tube. A coaxial tube surrounds the deliver... | 08/13/2002 |
| 6192715 | Furnace for forming optical fiber An optical fiber drawing furnace capable of the prevention of entry of an ambient gas into an inner space thereof both effectively and economically, provided with a lower gas introduction portion through which inert gas is introduced into the inner space ... | 02/27/2001 |
| 5974838 | Optical fiber graphite furnace featuring an automatic shutter door system for feeding an optical preform An optical fiber furnace having an access port for a preform is disclosed. The access port includes a gas pressure generation and sensing device and an automatic shutter door assembly. The gas pressure generation and sensing device responds to a sensed ga... | 11/02/1999 |
| 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 |
| 5658365 | Apparatus for applying tension to a fiber preform during soot deposition An apparatus is provided for applying a tensile force along the longitudinal axis of a cane assembly during the deposition of soot thereon to produce an optical fiber preform. Fiber drawn from such a preform exhibits improved core/clad concentricity. The ... | 08/19/1997 |
| 5167684 | Process and device for producing a hollow optical fiber A process for producing an optical fiber comprising the following stages: a stage of production of a preform having an axis of symmetry and their ends and comprising an optical core as well as at least one cylindrical recess whose axis is parallel to the ... | 12/01/1992 |
| 5078092 | Flash vaporizer system for use in manufacturing optical waveguide fiber A system for delivering a liquid reactant at high flow rates to an oxidation/flame hydrolysis glass soot deposition site. A first liquid only reactant is delivered to a flash vaporization chamber to form a thin film and mixed with oxygen after vaporizatio... | 01/07/1992 |
| 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 |
| 4894079 | Method and apparatus for supplying glass forming raw material In a method for supplying a glass forming raw material in a reactor which comprises bubbling a carrier gas into a liquid glass forming raw material contained in a container and supplying a mixture of the glass forming raw material and the carrier gas in t... | 01/16/1990 |
| 4813989 | Apparatus for fabricating optical fiber preform An apparatus for fabricating an optical fiber preform having a support for rotatably holding a reaction tube, a raw material supply unit for supplying a glass raw material from one end of the reaction tube to the interior of the reaction tube and a heater... | 03/21/1989 |
| 4675039 | Method and apparatus for forming glass fibers A feeder system for the production of glass filaments is provided with a shallow layer of molten glass over the discharge wall in combination with a flow control means adapted to regulate the depth of the layer to provide dripless and non-dripless operati... | 06/23/1987 |
| 4673428 | Method and apparatus for forming glass fibers A feeder for the production of glass filaments is provided with a shallow layer of glass over the discharge wall in combination with a fluid filled cavity capable of being pressure regulated to render the operation dripless or non-dripless as desired. Pre... | 06/16/1987 |
| 4447249 | Blowing wool separator method and apparatus Method and apparatus are disclosed for recovering blowing wool from an air stream by introducing the stream out aa drum rotating in a sealed shroud, the speed of rotating be adjusted in response to the pressure differential across the surface of the drum.... | 05/08/1984 |
| 4445918 | Process and apparatus for on-line dehydrogenation of fiber-drawing preforms Vapor deposition of doped silica in a reaction chamber on a rotating supporting surface, in the manufacture of a preform for the drawing of an optical fiber, is accompanied by the continuous admixture of deuterium with a flow of carrier gas, specifically ... | 05/01/1984 |
| 4421540 | System for producing an optical fiber preform with gas volume control A process for producing an optical fiber preform in a muffle furnace by hydrolyzing a gaseous glass forming material with a flame from an oxyhydrogen burner and depositing the resulting soot in a rod shape and an apparatus therefor are described, wherein ... | 12/20/1983 |
| 4392879 | Method of forming glass fibers while monitoring a process condition in a spinner The method and apparatus for monitoring a process condition in a spinner mounted for rotation, the spinner having an orificed sidewall for the centrifuging of molten mineral material therethrough, comprises a sensing means mounted for rotation with the sp... | 07/12/1983 |
| 4344785 | Modular molten glass column A modular molten glass column comprised of a plurality of modular glass conduits for providing glass to, for example, a high pressure glass fiber forming bushing is disclosed. The column consists of several glass modules, each of which includes a glass co... | 08/17/1982 |
| 4325721 | High pressure modular forehearth A high pressure modular forehearth which receives molten glass under pressure and supplies the molten glass to a plurality of high pressure glass fiber forming bushings is disclosed. Glass is melted in suitable means and is supplied to a modular molten gl... | 04/20/1982 |
| 4263034 | Method and apparatus for control of fiberization of thermoplastic material A process and apparatus for controlling the operating conditions, particularly the temperature and pressure, of attenuating gas employed in the fiberization of thermoplastic materials. The arrangement disclosed provides for temperature and pressure contro... | 04/21/1981 |
| 4240815 | Method for determining the surface weight of a mineral wool mat A method is provided for improving the uniformity of the surface weight of a mineral wool mat. The mat is produced from a mineral melt which is converted into fibers, these fibers being introduced into a gas-formed stream providing a transport medium for ... | 12/23/1980 |
| 4087267 | Controls for use in fiberization systems embodying means for suppression of pollution System for suppression of pollution in fiber attenuating operations, especially in mineral fiber insulation blanket production. The system disclosed provides gas blast attenuation of the attenuable material in a fiber forming chamber and for recirculation... | 05/02/1978 |
