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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 |
| 6938442 | Method for elongating a cylinder of silica glass According to a prior art method for producing a cylindrical component comprised of silica glass, a cylinder comprised of a softened silica glass mass is drawn in a predetermined drawing direction along a drawing axis by means of a drawing device which acts upon said... | 09/06/2005 |
| 6658897 | Optical fiber draw furnace having a SiC or Silicon Nitride tube An apparatus for drawing a fiber (11), particularly an optical glass fiber, from a heated preform (9), has a tubular heating element (1), which encloses preform (9) at least partly in its longitudinal direction, and an induction coil (4) surrounding tubul... | 12/09/2003 |
| 6647748 | Device for continuously twisting an optical fiber A device for continuously twisting an optical fiber, which can add a sufficient twist to an optical fiber, is provided. Reciprocating rollers reciprocate so that the moving direction would be opposite each other along a center axis of rotation. The optica... | 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 |
| 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 |
| 6453704 | Method of positioning a pulled fiber strand An apparatus for receiving and automatically moving a moving strand of fibers from a starting position to any one of a plurality of predetermined positions in a multi-grooved separator roll is disclosed. This apparatus is particularly in processes of maki... | 09/24/2002 |
| 6202449 | Strand positioning apparatus An apparatus for receiving and automatically moving a moving strand of fibers from a starting position to any one of a plurality of predetermined positions in a multi-grooved separator roll is disclosed. This apparatus is particularly in processes of maki... | 03/20/2001 |
| 5942019 | Elongating apparatus and method for glass preform and furnace body for elongating apparatus A furnace body for a glass preform elongating apparatus which makes an elongated body by passing the glass preform through the furnace body and elongating the glass preform while heating the glass preform, the furnace body comprising a furnace core tube s... | 08/24/1999 |
| 5935289 | Apparatus for automatic fiber manufacture Apparatus and methods of using the apparatus to automate a labor intensive portion of the process of making continuous fiber products, like chopped glass fiber. In this process many fiberizers are used, each fiberizer forming as many as several thousand f... | 08/10/1999 |
| 5931984 | Device for drawing down an optical fiber preform A device for drawing down an optical fiber preform (2) connected at one end to a feed rod (3) having an equal or smaller diameter. A chamber (11) in which the preform is drawn has an upper part (11A) with an opening (12). The opening engages the preform t... | 08/03/1999 |
| 5928402 | Multi-screen system for mixing glass flow in a glass bushing A multi-screen mixing apparatus for installation in a fiber-forming bushing used in the manufacture of glass fibers. The multi-screen mixer attaches to the walls of the bushing, and includes a first screen having openings therein through which the glass f... | 07/27/1999 |
| 5812725 | Method for increasing adhesion between a coating and an optical glass fiber electron beam pretreatment This invention provides a method of increasing adhesion of radiation-cured, inner primary coatings on glass optical fibers. A glass optical fiber drawing tower has a controllable variable amperage electron beam for exposing different sections of a glass o... | 09/22/1998 |
| 5779758 | Method and apparatus for forming continuous glass fibers An apparatus is provided for producing a glass fiber package. The apparatus includes a heated bushing for supplying streams of molten glass to be drawn into continuous fibers, a rotatable member adapted to draw the streams into fibers and to wind the fibe... | 07/14/1998 |
| 5679127 | Apparatus for drawing glass from a containment vessel to make optical fiber preforms A method and apparatus are provided for drawing a self-aligned core fiber free of surface contamination and inserting the core fiber into a cladding material to make an optical fiber preform. Single or multi-mode optical fibers having high quality core-cl... | 10/21/1997 |
| 5674306 | Method and apparatus for drawing glass preform for optical fiber A glass preform for an optical fiber is effectively drawn by connecting dummy rods to both ends of the glass preform and connecting the dummy rods to fitting members.... | 10/07/1997 |
| 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 |
| 5656058 | Apparatus for inserting a core fiber into a partially molten cladding glass to form an optical fiber preform A method and apparatus are provided for forming a glass preform which can be directly drawn into a single or multi-mode optical fiber. Single or multi-mode fibers drawn from the preforms described herein have high quality core-clad interfaces since the co... | 08/12/1997 |
| 5647884 | Apparatus for reducing deformation of a coating on a coated optical fiber A capstan belt (80) is mounted on a pair of pulleys (82,83) for engagement with the surface of a draw capstan (75), the capstan belt (80) being driven for rotation on the pair of pulleys (82,83) by rotational movement of the capstan (75). A coated optical... | 07/15/1997 |
| 5639292 | Process and apparatus for applying size to glass fibers A process and apparatus are provided for coating a sizing composition onto glass fibers. The apparatus includes an applicator for applying a liquid sizing composition to the glass fibers and a treatment station for treating the sized fibers to increase th... | 06/17/1997 |
| 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 |
| 5425796 | Method of and an apparatus for forming a composite thread including stretching of thermoplastic filaments A method and apparatus for producing a composite thread formed by the association or blending of continuous glass filaments and continuous filaments thermoplastic organic matter. The thermoplastic filaments are, while in the form of a sheet, blended with ... | 06/20/1995 |
| 5352261 | Apparatus for the production of hermetically coated optical fiber There is provided an apparatus for the production of a hermetically coated optical fiber in which a glass preform for an optical fiber is melt drawn in a melt drawing furnace to produce a bare optical fiber which is passed to a reactor where a feed gas is... | 10/04/1994 |
| 5314515 | Method and apparatus for fiber cooling A method and apparatus for cooling a glass optical fiber drawn from a glass preform, prior to applying a protective coating to the fiber, wherein the fiber is transported through a cooling zone containing coolant consisting of a solid or liquid dispersion... | 05/24/1994 |
| 5125942 | Process for the production of mineral wool fibres of low shot content The process for the production of mineral wool fibres is based on melt streams 1 issuing from a melt distributor 3 being reduced to fibres in a drawing nozzle 9 by a blast medium flowing with high velocity in the axial direction. The blast medium charged ... | 06/30/1992 |
| 5030266 | Apparatus for adjusting the configuration of optical substrates In order to provide a substrate such as an optical preform rod (24) which is suitable for insertion into a tube and which has a transverse cross section that is substantially circular and disposed concentrically about a longitudinal axis of the substrate ... | 07/09/1991 |
| 4884859 | Optical attenuator and manufacturing method for making same A simple method of manufacturing optical attenuators comprises heating a part of an optical fiber composed of a core and a cladding to a temperature around the softening point of the materials of the optical fiber and applying a tension and/or a twist to ... | 12/05/1989 |
| 4565558 | Apparatus for the manufacture of constructions in fibers An apparatus for manufacturing constrictions in fibers characterized by a stretching device for stretching the fiber and a heating device for brief local heating of the stretched fiber to a softening temperature. To improve the reliability and reproducibi... | 01/21/1986 |
| 4565557 | Containerless high purity pulling process and apparatus for glass fiber Apparatus and method for pulling optical glass fibers in a containerless environment is disclosed which includes a single-axis acoustical levitation furnace (10) in which a specimen (S) is levitated and melted. A reflector unit (16) is carried in the inte... | 01/21/1986 |
| 4450333 | Zirconia induction furnace A high frequency induction furnace (10) for reflowing a portion of a lightguide preform (44) in order to draw a fiber (52) therefrom. The furnace (10) has a centrally located tubular susceptor (34) therein having a thin coating of the preform material (e.... | 05/22/1984 |
| 4447248 | Method of making and using glass fiber forming feeders A method of making an orificed discharge wall for supplying a plurality of streams of molten inorganic material to be attenuated into filaments comprising inserting elements in apertures in a member; sealing said elements and member within a coating adapt... | 05/08/1984 |
| 4410344 | Optical waveguide fiber draw guiding and coating method and apparatus A method of uniformly coating an optical waveguide fiber 10 comprises the steps of suspending an elongated glassy optical fiber preform 11 in an upright orientation from a preform holder that includes a collet 14 to which an x-y translator 15 is coupled, ... | 10/18/1983 |
| 4378237 | Device for the manufacture of a fleece of inorganic and organic fibrous material The present invention is directed to an apparatus for manufacture of a fleece with irregularly erect fiber structure which comprises a chamber attached to a spinning chamber, the first chamber comprising at least one high voltage electrode and a grounded ... | 03/29/1983 |
| 4340627 | Wound and sintered vitreous silica article and method of making A method is described for the production of porous bodies from vitreous silica without the use of tools. Vitreous silica wool and/or threads are wound in layers on a form. After the coil has attained a certain minimum thickness, the threads of each succee... | 07/20/1982 |
| 4284395 | Apparatus for forming filaments Method and apparatus are provided for forming filaments comprising: means for supplying a plurality of streams of molten material; attenuation means for supplying of moving fluid to attenuate said streams into said filaments; said filaments being entraine... | 08/18/1981 |
| 4280827 | System for measuring optical waveguide fiber diameter The diameter of an optical fiber being drawn is monitored and controlled by an optical measuring technique. An electrical input signal is generated from the fringe pattern produced by directing a laser beam onto the fiber. The input signal is connected to... | 07/28/1981 |
| 4260403 | Bushing environmental control apparatus A method is disclosed for maintaining a uniform airflow and thus uniform thermal conditions below a bushing in a continuous glass fiber forming operation. The method comprises passing the glass filaments through an enclosure and blowing a gaseous fluid th... | 04/07/1981 |
| 4235614 | Method and device for the manufacture of glass filaments This invention relates to a method and apparatus for promoting the fiberization of continuous lengths of thermoplastic materials such as glass. Prior attempts to reduce fiber breakage, bushing flooding and facilitate fiberization utilized steam or a decom... | 11/25/1980 |
| 4171212 | Molten glass separating device in glass fiber forming apparatus In a glass fiber forming apparatus comprising an orifice plate which has a large number of closely spaced orifices and has a flat undersurface and air is blown upwardly against said orifice plate during spinning operation, means is provided for mechanical... | 10/16/1979 |
| 4140507 | Bushing and method for forming glass fibers A bushing for use in the drawing of glass filaments to form glass fibers formed of a silicon-based ceramic having a plurality of openings extending therethrough and hollow tip elements formed of a precious metal extending through the openings in the bushi... | 02/20/1979 |
