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| Number | Title | Issue Date |
| 7966846 | Optical fiber drawing and twisting apparatus An optical fiber twisting apparatus that prevents line distortion in an optical fiber undergoing a drawing process and provides a consistent coating on a bare optical fiber. This optical fiber twisting apparatus includes a twist roller apparatus that having a twist ... | 06/28/2011 |
| 7383703 | Anti-PMD system for optical fibers An anti-PMD system comprises a pulley which oscillates in rotation and applies a torsion torque alternately in the clockwise direction and in the counterclockwise direction to an optical fiber during drawing of the optical fiber to reduce its PMD. A portion of a per... | 06/10/2008 |
| 7317855 | Method of imparting twist to optical fiber A method for producing low-PMD fiber, in which a glass fiber is drawn from an optical fiber perform by a tractor which pulls such optical fiber from said perform; subsequent to said tractor pulling the fiber is twisted about its axis to increase the magnitude of twi... | 01/08/2008 |
| 7100400 | Manufacture of silica bodies using sol-gel techniques The use of large dense vitreous spherical (LDVS) silica powders for making sol-gel silica bodies has been found to have important advantages. Among these are higher gel strength, higher silica loading, more rapid aging and drying of the gel, a reduction in the amoun... | 09/05/2006 |
| 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 |
| 6876804 | Method of making a spun optical fiber with low polarization mode dispersion An optical fiber, and a method of making such optical fiber, wherein the optical fiber exhibits a beatlength greater than about 5 meters, and the fiber is spun to provide a polarization mode dispersion in the spun state of said fiber which is less than 0.05 ps/km | 04/05/2005 |
| 6859596 | Systems and methods for forming ultra-low PMD optical fiber using amplitude and frequency keyed fiber spin functions A system and method is disclosed for manufacturing single mode optical fiber which incorporates a spin in the molten fiber during manufacturing. The introduction of spin minimizes a form of distortion called polarization mode dispersion (PMD) and varying the spin, i... | 02/22/2005 |
| 6851283 | Thermoinsulating mat of mineral fibers with random orientation A mat of mineral fibers has a random or quasi-random fiber orientation. The fibers have diameters which, for the great majority of them, are 2.5 to 4.5 micrometers, and a length of 2 to 15 cm. Its density is less than 40 kg/m3. Its resistance to compressi... | 02/08/2005 |
| 6789399 | Method for measuring the twisting of an optical fiber, and a method and apparatus for manufacturing optical fibers When an optical fiber 3 is formed by drawing a preform 1, twisting is generated in the optical fiber 3. An outer diameter of the optical fiber 3 is continuously measured along a longitudinal direction of the optical fiber 3 from tw... | 09/14/2004 |
| 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 |
| 6550282 | Method and apparatus for manufacturing an optical fiber from a preform A method for manufacturing an optical fiber (100) having low PMD, comprises the steps of: a) heating at least one end portion (3a) of a preform (3); b) drawing an optical fiber (100) from a free end of said heated end portion (3a) along a fiber drawing axis (I... | 04/22/2003 |
| 6550281 | Method for providing controlled spin in optical fiber A fiber (106) having low polarization mode dispersion is made by heating the end of a preform (100) with a furnace (101). The fiber is drawn from the heated end. The fiber passes between two rollers (102, 104). As the fiber passes therebetween, the angula... | 04/22/2003 |
| 6347537 | Method of drawing a twisted optical fiber An optical fiber is rolled by a swing motion of a swing guide roller in order to impart a predetermined twist to it effectively, and its polarization dispersion is suppressed equivalently as in a perfectly circular concentric optical fiber. A method of ma... | 02/19/2002 |
| 6324872 | Method and apparatus for introducing controlled spin in optical fibers Optical fiber is provided with a periodically reversing spin while the fiber is pulled through a melt zone. A cooled region of the fiber downstream from the melt zone passes between a pair of opposed elements. The opposed elements are moved so that surfac... | 12/04/2001 |
| 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 |
| 6167729 | Fiber manufacturing spinner A spinner is adapted to be fixed at one end of a rotatable shaft in a fiberizer, the spinner including a radial wall extending radially out from the shaft and having an upper surface, a dam separating the upper surface into an inner portion and an outer p... | 01/02/2001 |
| 6076376 | Method of making an optical fiber having an imparted twist An optical fiber is rolled by a swing motion of a swing guide roller in order to impart a predetermined twist to it effectively, and its polarization dispersion is suppressed equivalently as in a perfectly circular concentric optical fiber. A method of ma... | 06/20/2000 |
| 5987928 | Device for fiberizing molten mineral materials The present invention furnishes a device for fiberizing molten mineral materials in order to produce mineral fiber products by means of a spinner (2) having a multiplicity of orifices (6; 8) provided in the peripheral wall (4) thereof, for centrifuging mo... | 11/23/1999 |
| 5935292 | Annealing mold and retainer for making a fiber optic current sensor An annealing mold and fiber retaining device includes a fiber holding plate having fiber channels and an annealing insert. Retainers are provided for attachment to the plate to retain fibers in the channels. After annealing, the annealing insert is replac... | 08/10/1999 |
| 5907770 | Method for producing semiconductor device An amorphous silicon film is formed on a flat glass substrate, and then crystallized by heating to obtain a crystalline silicon film. The glass substrate is placed on a stage having a convex U-shaped curved surface. The glass substrate is heated for a des... | 05/25/1999 |
| 5897680 | Method of making a twisted optical fiber with low polarisation mode dispersion A method of manufacturing an optical fiber, whereby a fiber is drawn from a molten extremity of a preform and is subsequently subjected to a torque, thereby causing a portion of the fiber to be twisted about its longitudinal axis and to be endowed with a ... | 04/27/1999 |
| 5779760 | Fiber manufacturing spinner A spinner is adapted to be fixed at one end of a rotatable shaft in a fiberizer, the spinner including a radial wall extending radially out from the shaft and having an upper surface, a dam separating the upper surface into an inner portion and an outer p... | 07/14/1998 |
| 5647883 | Apparatus for making hollow multi-component insulation fibers A fiber insulation product comprising hollow fibers. Each hollow fiber may be composed of at least two different thermoplastic insulating materials, such as glasses, having differing coefficients of thermal expansion, with each of the hollow fibers being ... | 07/15/1997 |
| 5639291 | Method of and apparatus for forming composite and other fibers In a method of and an apparatus for forming composite and other fibers, individual filaments from two or more sets of continuous primary filaments of two or more heat-softenable fiberizable materials are brought together lengthwise to form pairs of contin... | 06/17/1997 |
| 5618328 | Spinner for manufacturing dual-component fibers Apparatus for making dual component fibers is provided and includes a spinner having a peripheral wall. The spinner includes orifices located on the peripheral wall thereof for centrifuging the dual component fibers, with the spinner being divided into a ... | 04/08/1997 |
| 5618327 | Method of making an insulation product from irregularly-shaped conjugate glass fibers A glass fiber insulation product comprises irregularly-shaped glass fibers of two different glasses having differing coefficients of thermal expansion, with the irregularly-shaped dual-glass fibers exhibiting a substantially uniform volume filling nature,... | 04/08/1997 |
| 5595766 | Spinner for dual component fibers having multiple exits for each inlet Apparatus for making dual component fibers is provided and includes a spinner having a peripheral wall. The spinner includes orifices located on the exterior of the peripheral wall for centrifuging dual component fibers, with the spinner being divided int... | 01/21/1997 |
| 5514199 | Spinner for producing dual component fibers An apparatus for making dual component fibers is provided and includes a distributor having orifices in the peripheral wall and nested within a rotary spinner. The distributor is divided into a series of generally vertically-aligned compartments by baffle... | 05/07/1996 |
| 5509953 | Spinner for manufacturing dual-component fibers An apparatus for making dual component fibers is provided and includes a spinner having peripheral and bottom walls. The spinner includes orifices located on the peripheral wall thereof for centrifuging the dual component fibers, with the spinner being di... | 04/23/1996 |
| 5492552 | Holder for annealing fiber optic coils A holder for annealing a fiber optic coil uses a silica ring on a silica substrate, or silica tubular coil, either of which may be directly incorporated into a coil subassembly for a Faraday-effect current sensor. The ring may be formed in a silica plate ... | 02/20/1996 |
| 5482527 | Spinner apparatus for producing dual component fibers An apparatus is provided for making dual component fibers. The apparatus comprises a distributor, equipment for providing first and second thermoplastic materials to the distributor, a rotatable spinner and a rotation mechanism. The distributor has an out... | 01/09/1996 |
| 5474590 | Spinner for manufacturing dual-component fibers having an angled array of orifices Apparatus for making dual component fibers is provided and includes a spinner having a peripheral wall. The spinner includes orifices located on the peripheral wall thereof for centrifuging the dual component fibers, with the spinner being divided into a ... | 12/12/1995 |
| 5468275 | Apparatus having elongated orifices for centrifuging dual-component, curly, glass fibers Apparatus for making dual-component thermoplastic fibers, such as glass fibers, comprises a spinner having an orificed peripheral wall for centrifuging fibers from thermoplastic material, the spinner having vertically aligned compartments with first and s... | 11/21/1995 |
| 4927445 | Apparatus for producing coated single twist glass yarns A process for producing coated, single twist glass yarns which comprises drawing a plurality of fibers formed from fibers of molten glass, applying to the fibers a sizing comprising a thermoplastic, thermosetting or photosetting composition, gathering the... | 05/22/1990 |
| 4808204 | Method and apparatus for producing bends in optical fibers An apparatus for producing bends in optical bends in optical fibers comprising a pair of plates hingedly connected along one edge of each of the plates so that the plates may lie in face-to-face contact and may be hingedly separated, means defining a cavi... | 02/28/1989 |
| 4329163 | Method for forming and treating kinky fibers from glass The disclosure embraces a method of and apparatus for processing heat-softenable materials, such as glass, to form fibers or filaments from the streams of material and more particularly effecting successive distortions, oscillations or vibrations of the s... | 05/11/1982 |
| 4309203 | Process for manufacturing boron nitride fiber batts using a spinner A process is disclosed for producing non-woven, yet internally cohesive, boron nitride fiber batts, suitable for use as an electric cell separator in a lithium-sulfide battery. Molten boron oxide is centrifugally spun into strands and attenuated by an ann... | 01/05/1982 |
| 4274855 | Method and apparatus for forming and treating kinky fibers from glass The disclosure embraces a method of and apparatus for processing heat-softenable materials, such as glass, to form fibers or filaments from the streams of material and more particularly effecting successive distortions, oscillations or vibrations of the s... | 06/23/1981 |
| 4145199 | Method and apparatus for forming kinky fibers from heat-softenable material The disclosure embraces a method of and apparatus for processing heat-softenable materials, such as glass, to form fibers or filaments from streams of the material and particularly a method of and apparatus for effecting successive distortions, oscillatio... | 03/20/1979 |
| 4144044 | Method and apparatus for forming fibers Method and apparatus for forming a twisted or distorted filament are provided by flowing streams of molten material and moving a member located within the stream of molten material at the zone of attenuation sufficient to produce a textured filament.... | 03/13/1979 |