Class 65/434 - With quench cooling (e.g., forced air or cryogenic immersion, etc.)

Subclass of Class 65 - Glass manufacturing
Definition: Processes combined with a step of rapidly lowering the temperature
No. of patents: 39
Last issue date: 07/19/2011

Number	Title	Issue Date
7980098	Method for producing an optical component of synthetic quartz glass with enhanced radiation resistance, and blank for producing the component To optimize an optical component of synthetic quartz glass, in the case of which a quartz glass blank is subjected to a multistage annealing treatment, with respect to compaction and central birefringence, the present invention suggests a method comprising the follo...	07/19/2011
7677060	Method for manufacturing optical fiber and the cooling of the optical fiber A method for manufacturing an optical fiber by drawing an optical fiber preform softened by heating, includes cooling the optical fiber at a cooling rate of not more than 4000° C. per second at a temperature of 1200 to 1400° C. of the optical fiber; and cooling th...	03/16/2010
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
7028508	Method for producing an optical fiber and optical fiber In the known method for producing an optical fiber, a coaxial arrangement comprising a core rod and an outer jacket tube is elongated, the coaxial arrangement being supplied in a vertical orientation to a heating zone and being softened therein zonewise, starting wi...	04/18/2006
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
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
6530243	Method of making an optical fiber with an improved UV-curable resin A method of drawing an optical fiber which can improve the efficiency in manufacture without deforming resin coatings is provided. The method of drawing an optical fiber in accordance with the present invention is a method in which an optical fiber yieldi...	03/11/2003
6408654	Filament forming apparatus and a cooling apparatus for and method of inducing a uniform air flow between a filament forming area and the cooling apparatus A filament forming apparatus and cooling apparatus for and method of inducing a uniform air flow between a filament forming area beneath a bushing and the cooling apparatus are disclosed. The cooling apparatus includes an air housing extending beneath the...	06/25/2002
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
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
6134922	Method for drawing a glass ingot A method for drawing a glass ingot into a rod having a given outer diameter is described. The method is characterized in that when the glass ingot is fed into a heating zone at a final tapered portion thereof, a temperature in the heating zone is decrease...	10/24/2000
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
5928574	Method of making optical fiber Fiber bow makes mass fusion splicing of optical fiber difficult and this is undesirable. We have found that fiber bow can be significantly reduced if the fiber that is being drawn from a heated optical fiber preform is caused to run through a tubular cool...	07/27/1999
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
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
5624507	System for production of a quenchant gas mixture The invention provides a process and apparatus for producing a quench gas mixture for increasing the cooling rate of an article. The quench gas mixture is produced by introducing helium gas into the bottom of a vessel containing a cryogenic liquid. Heat i...	04/29/1997
5568728	Filament cooler A filament cooler suitable for cooling freshly drawn optical fibre preparatory for being coated with a protective plastics coating has a water-cooled body member provided with a through hole opening out abruptly into a succession of spherical chambers in ...	10/29/1996
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
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
5160359	Apparatus and method for drawing an optical fiber from a solid blank For the drawing of an optical fiber from a solid blank, the latter is conducted vertically through a furnace and, during this process, is heated to the drawing temperature at its lower end, from which the fiber is drawn out in the form of a drawing onion....	11/03/1992
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
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
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
4913715	Method of manufacturing an optical fiber having a protective coating A method of and a device for manufacturing an optical fiber with a protective coating. A cooling device cools the fiber after drawing from a preform. The cooling device comprises a forced-cooled double-walled tube. In the space enclosed by the inner tube ...	04/03/1990
4895813	Method for fabricating devices including multicomponent metal halide glasses and the resulting devices A new method for fabricating devices which include multicomponent metal halide glasses, e.g., multicomponent metal halide glass optical fibers, is disclosed. In accordance with the inventive method, a multicomponent metal halide glass body, essentially fr...	01/23/1990
4894078	Method and apparatus for producing optical fiber In a method for producing an optical fiber having a resin coating, an optical fiber which is drawn from a preform for an optical fiber heated and melt by a heating source can be effectively cooled before it is coated with a resin by cooling the drawn fibe...	01/16/1990
4874415	Method of manufacturing a high mechanical strength optical fiber by drawing under high tension An optical fiber (F) is pulled by a capstan (6) from a silica preform (1) whose bottom end (20) is softened in an oven (2). After cooling, said fiber is coated with an organic protective coating by means of a coating device (4). According to the invention...	10/17/1989
4761168	Optical fiber manufacturing technique The speed at which optical fibers can be drawn and coated is significantly increased by efficiently stripping the gas boundary layer entrained by the moving fiber. The stripping is periodically repeated to ensure that the entrained flow is not re-establis...	08/02/1988
4702759	Apparatus for reducing volume and surface defects in silica optical-fibres The method allows surface defect reduction in silica optical-fibres by enriching the external layer by silica bonded carbon atoms within the silica network: SiC.SiO2. Carbon is obtained from chemical reaction directly during the drawing step. V...	10/27/1987
4664689	Method and apparatus for rapidly cooling optical fiber A method and apparatus for rapidly cooling optical fiber comprising passing optical fiber through an enclosure having a flat black internal surface, the walls of said enclosure having symmetrically oriented perforations or other symmetrically oriented mea...	05/12/1987
4594088	Method and apparatus for making, coating and cooling lightguide fiber An apparatus (30) for cooling a lightguide fiber (21) drawn from a molten portion of a glass preform (22) located in a furnace (23). The apparatus (30) has an upper chamber (34) and a lower chamber (36) each having a small opening in the lower portions th...	06/10/1986
4578098	Apparatus for controlling lightguide fiber tension during drawing A lightguide furnace (10) includes a tube (32) at its base. The tube (32) has at least one opening (34) therethrough, in communication with, but substantially misaligned relative to, a corresponding opening (40) through a sleeve (36) coaxially aligned wit...	03/25/1986
4514205	Fiber cooling apparatus Disclosed is an optical waveguide fiber coating system having means for cooling the hot fiber prior to the time that the fiber enters the coating apparatus. The cooling means comprises an elongated coolant tube through which the fiber passes. Cool dry hel...	04/30/1985
4473599	Process for providing optical fibers conditioned for hostile environments and fibers thus formed A process for manufacturing an optical fiber having a ceramic coating applied at the preform stage or drawn fiber stage wherein the coating hermetically seals the fiber against penetration of environmental gases and fluids and increases the fiber tensile ...	09/25/1984
4437870	Optical waveguide fiber cooler Disclosed is an optical waveguide fiber coating system having means for cooling the hot fiber prior to the time that the fiber enters the coating apparatus. The cooling means comprises an elongated tube through which the fiber passes. Cool dry helium is f...	03/20/1984
4428646	Optical fibers having crystalline material and method of making same An optical fiber with a graded index crystalline core (2,3) is made by filling a tube (1) with a mixture of two salts for which the one with the higher melting point has the lower refractive index. A graded composition results from partition effects when ...	01/31/1984
4126436	Apparatus for minimizing drawn filament diameter variation An apparatus is disclosed for drawing glass optical waveguide filaments having minimal diameter variation. A draw blank is supported within an elongated, heated, tubular muffle which heats the blank to its draw temperature. Gas is supplied to that end of ...	11/21/1978

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Class 65/434 - With quench cooling (e.g., forced air or cryogenic immersion, etc.)