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Class 65/438 - Producing crimped, twisted, or curled fibers (e.g., textured, etc.)


Subclass of Class 65 - Glass manufacturing
Definition: Processes wherein the longitudinal axis of the glass fiber
No. of patents: 45
Last issue date: 12/25/2007


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NumberTitleIssue Date
7310974Method for producing twisted optical fiber with reduced polarization mode dispersion
A method for drawing an optical fiber having reduced polarization mode dispersion (PMD) draws an optical fiber from an optical fiber preform whose core ovality is at max about 3%, coats the optical fiber with acrylic polymer and twists the coated optical fiber with ...
12/25/2007
7284397Method of controlling the polarization mode dispersion of an optical fiber during fiber drawing
An optical fiber drawing installation is equipped with an oscillating pulley that applies torsion to the fiber alternately in one rotation direction and then in the opposite direction. To control the torsion applied to the fiber, images are formed of the fiber and t...
10/23/2007
7035525Methods and apparatuses for correcting mechanical twist in optical fiber
Methods and apparatuses negate a measured mechanical twist of an optical fiber by introducing a counteracting twist to bring the net mechanical twist closer to zero, which reduces the fiber's polarization mode dispersion (PMD). A spool of optical fiber having undesi...
04/25/2006
7035523Inexpensive fiber optic attenuation
An attenuator for fiber optic cable has a device for receiving a length of the cable. A series of attenuation structures is defined on the device, the attenuation structures being located proximate to each other. Each of the attenuation structures is adapted to bend...
04/25/2006
7016576Method for producing an optical fibre telecommunications cable with reduced polarization mode dispersion
An optical cable for telecommunications having an optical core and a plurality of protecting and reinforcing elements or avers placed around the optical core. The optical core has a central reinforcing element, a polymer layer, a plurality of optical fibers incorpor...
03/21/2006
6859596Systems 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
6851283Thermoinsulating 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
6837074Method of measuring the twist imparted to an optical fibre and procedure for processing an optical fibre using this method
A method of measuring the twist imparted to an optical fibre includes the steps of advancing the optical fibre in a predetermined direction and at a predetermined velocity, imparting to the optical fibre, during the step of advancing, a twist about its axis, measuri...
01/04/2005
6550283Method 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...
04/22/2003
6381989Heat treated fibers for reinforced dental restorations and method of manufacture thereof
A method for processing a glass fiber material, wherein the glass fiber material has been heat treated at a temperature less than or equal to the annealing temperature of the glass for a length of time effective to prevent separation and fraying of the ed...
05/07/2002
6370747Method and apparatus for the bulk collection of texturized strand
A method and apparatus for collecting texturized strand are disclosed. The apparatus for collecting texturized strand includes a texturizer for expanding a continuous strand of glass fibers into a wool-like product, a container for collecting the texturiz...
04/16/2002
6113722Microscopic tube devices and method of manufacture
The invention comprises devices composed of at least one microscopic hollow tube having a wall of single or multiple layers with a thickness of at st one nanometer and a diameter of at least 5 nanometers. The walls of the tubes can be formed from a wide...
09/05/2000
5943466Frequency and amplitude modulated fiber spins for PMD reduction
The invention provides improved methods for reducing polarization mode dispersion (PMD) in single mode fiber by spinning the fiber during the drawing process in accordance with a spin function having sufficient harmonic content to achieve low levels of PM...
08/24/1999
5786082Loose-fill insulation having irregularly shaped fibers
A loose-fill insulation product having irregularly shaped glass fibers is provided. The loose-fill insulation product shows improved recovery, lower thermal conductivity and requires lower product densities than prior art loose-fill insulation at equivale...
07/28/1998
5779760Fiber 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
5776223Method of making shaped fibers
In a method of making a shaped fiber, a stream of fiberizable material is provided with an original shape and a void fraction from 20% to 80%. The void fraction can be provided by forming a hollow stream, a porous stream or a significantly shaped stream. ...
07/07/1998
5770309Hollow multi-component insulation fibers and the manufacturing of same
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 ...
06/23/1998
5743932Method of making an insulation product from hollow fibers
A method of making an insulation product of hollow fibers whereby molten insulation material is centrifuged through a plurality of orifices and gas is directed into the molten insulation material through a plurality of gas conduits, wherein each gas condu...
04/28/1998
5704960Method of forming an optical fiber for reduced polarization effects in amplifiers
A single mode optical fiber suitable for use in an amplified fiber optic system which includes an inner glass core doped with a rare earth element and an outer transparent glass cladding. The fiber exhibits a plurality of mode coupling sites formed at reg...
01/06/1998
5688301Method for producing non-woven material from irregularly shaped glass fibers
An irregularly shaped glass fiber is provided which enjoys improved resiliency, and openness in pack structures. Wool packs and other wool portions having such irregularly shaped fibers may be processed directly through needling to form a non-woven materi...
11/18/1997
5679126Method for collecting fibers from rotary fiberizer
A method of producing a fibrous product is disclosed. Molten material is introduced into a rotating spinner which includes a peripheral wall having a plurality of orifices. The molten material is centrifuged through the orifices to create fibers. The fibe...
10/21/1997
5639291Method 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
5624742Blended loose-fill insulation having irregularly-shaped fibers
A loose-fill insulation product is provided which is formed from a blend of first and second insulating materials having three-dimensional groups of fibers of different sizes and densities. At least one of the insulating materials is comprised of irregula...
04/29/1997
5618327Method 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
5536550Dual-glass fibers and insulation products therefrom
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,...
07/16/1996
5529596Method for making dual-glass fibers by causing one glass to flow around another glass as they are spun from a rotating spinner
A method for making dual-glass fibers includes supplying first and second molten glass to a rotating spinner having an orificed peripheral wall, where the first glass has a higher viscosity than that of the second glass, centrifuging the first and second ...
06/25/1996
5431992Dual-glass fibers and insulation products therefrom
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,...
07/11/1995
5418881Article comprising optical fiber having low polarization mode dispersion, due to permanent spin
The presence of (typically unintended) birefringence in single mode optical fiber can severely limit the usefulness of the fiber for, e.g., high bit rate or analog optical fiber communication systems, due to the resulting polarization mode dispersion (PMD...
05/23/1995
5408555Polarization insensitive wavelength multiplexing 2×2 fibre couplers
In the manufacture of a wavelength multiplexing 2×2 tapered fused fiber coupler by progressive stretching, the birefringence of the coupler resulting from the progressive stretching is subsequently nulled-out by elastic twisting of the coupler. The progr...
04/18/1995
5011566Method of manufacturing microscopic tube material
A sacificial fiber method to fabricate straight, curved, or coiled tubes as small as 1 micron (0.000004 inches) in diameter with wall thicknesses starting at less than 0.01 microns. These tubes can be made from many of the materials that can be applied to...
04/30/1991
4909817Apparatus and method for the manufacture of loose fibrous mineral material
The present invention provides a multi-purpose collection system for use in the simultaneous manufacture of loose fibrous mineral material and insulation blankets or mats from the forming machine. The loose fibrous mineral material is directly intercepted...
03/20/1990
4853021Process and 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...
08/01/1989
4798615Process for making a filter for molten metal having a high melting point
A filter for molten metal having a high melting point is in the form of a net woven of glass yarns formed by twisting a multiplicity of glass fibers together. The glass fibers contain at least 75 wt. % of SiO2 and are thermally cured at a therm...
01/17/1989
4776865Method of forming a fiber-reinforced inorganic composite
A method of forming a fiber-reinforced, glass or glass-ceramic, elongated composite is described wherein several multifiber lengths are impregnated with matrix material, woven or twisted to form a fabric network, the impregnating matrix material softened,...
10/11/1988
4608071Method for reducing diameter of a glass rod or tube by drawing
The invention provides an efficient and accurate method for reducing the diameter of a rod or tube of glass, e.g. fused quartz glass rod as a base material of optical fibers, by drawing when the rod or tube is heated and in a softened and plastically defo...
08/26/1986
4537610Method and apparatus for producing chopped strands
Method for producing discrete bundles of filaments includes applying a non-aqueous, hot melt coating material to continuous filaments and gathering the coated continuous filaments into a bundle. The coating material is solidified on the continuous filamen...
08/27/1985
4470252Process for producing treated glass fiber strands for high speed bulking
Glass fiber strand is prepared from a process so that the strand can be bulked at higher processing speeds. The process involves drawing the glass fibers from molten glass, applying an aqueous treating composition to the fibers, gathering the treated glas...
09/11/1984
4329163Method 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
4274855Method 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
4145199Method 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
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