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| Number | Title | Issue Date |
| 7814767 | Method and induction furnace for drawing large diameter preforms to optical fibres An induction furnace capable of drawing large diameter preforms of up to 130 mm is described. The induction furnace has top and bottom chimneys surrounding the entire preform during operation of the furnace with an inert conditioning gas which is introduced into the... | 10/19/2010 |
| 7251959 | Washwater neutralization system for glass forming line A neutralization system for controlling the pH of the washwater used to clean and maintain polyacrylic bound glass forming equipment. The neutralization system introduces a base solution to a washwater solution when the pH of the washwater solution contained in a cl... | 08/07/2007 |
| 7185516 | Washwater neutralization system for glass forming line A neutralization system for controlling the pH of the washwater used to clean and maintain polyacrylic bound glass forming equipment. The neutralization system introduces a base solution to a washwater solution when the pH of the washwater solution contained in a cl... | 03/06/2007 |
| 7013953 | Heat exchanger for wasted heat with its cleaning apparatus A waste heat recovery system includes: a tank; heat exchange pipes connected with one another in the form of a ‘S’ shape in multiple steps inside the tank and having city water flow pipes bound up into a bundle; circulation leading plates mounted between the hea... | 03/21/2006 |
| 7003985 | Method and apparatus for removing polymeric coatings from optical fiber in a non-oxidizing environment In accordance with the invention, the polymeric coating is removed from a coated optical fiber by disposing the fiber within a non-oxidizing environment and applying sufficient heat to volatilize at least a portion of the polymeric coating. The result is that the co... | 02/28/2006 |
| 6964288 | Apparatus and method for automated preparation of an optical fiber An automated fiber preparation system and method for automatically fabricating an optical fiber. One or more fabrication processes associated with fiber preparation may be performed on an optical fiber without requiring active user input. The fiber preparation syste... | 11/15/2005 |
| 6666984 | Chemical stripping apparatus and method An apparatus for forming a loop in a filament comprising a first wall having a first guide slot formed therein and a second wall having a second guide slot formed therein coplanar and parallel to the first guide slot. The first wall is opposite the second... | 12/23/2003 |
| 6647747 | Multifunctional apparatus for manufacturing mineral basalt fibers The invention discloses a multifunctional apparatus and method to manufacture mineral (basalt) fibers to be drawn/attenuated into a continuous strand made from natural rock basalts with and without supplemental minerals. More specifically this invention d... | 11/18/2003 |
| 6547920 | Chemical stripping apparatus and method An apparatus for forming a loop in a filament comprising a first wall having a first guide slot formed therein and a second wall having a second guide slot formed therein coplanar and parallel to the first guide slot. The first wall is opposite the second... | 04/15/2003 |
| 6463764 | Germanium-containing particulate capture from an exhaust gas stream of a glass production system The invention relates to a method and apparatus for a glass manufacturing facility. The apparatus includes a glass production system providing an exhaust stream entrained with particulate material including germanium--containing particulate. The apparatus... | 10/15/2002 |
| 6449986 | Method of production of porous glass base material for optical fiber with cleaning of the burner with gas at 25 m/s or faster In a method of manufacturing a porous glass preform for an optical fiber which preform is formed as a deposit of fine glass particles by using a burner, a method to prevent the contamination of any glass particles having failed to be properly deposited so... | 09/17/2002 |
| 6260386 | Optical fiber preform cleaning method Glass preforms are cleaned by contacting each preform (11) with supercritical carbon dioxide which dissolves residual index-matching oil on the preform. The liquefied carbon dioxide is then converted to gaseous carbon dioxide which conveniently separates ... | 07/17/2001 |
| 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 |
| 5597398 | Process for producing glass preform for optical fiber A process for producing a porous glass preform for optical fiber by depositing fine glass particles on an outer surface of a glass material while moving the glass material, including the steps of: preheating a portion of the glass material for not less th... | 01/28/1997 |
| 5246653 | Apparatus for the continuous production of mineral wool nonwovens An apparatus and a process for the continuous production of mineral wool nonwovens in the nonwoven formation process on the drums of the accumulating conveyors arranged at the lower end of a chute. Several fiberization units (1, 2, 3, 4) communicate with ... | 09/21/1993 |
| 5051123 | Arrangement for cleaning surfaces of a wool chamber in the manufacture of mineral wool An arrangement for cleaning a wool chamber in the manufacture of mineral wool. In the manufacture of mineral wood, a binder is added to the stream of fibres. The stream is deflected towards the wool chamber and the binder deposits itself in fine droplets ... | 09/24/1991 |
| 4988374 | Method and apparatus for contaminant removal in manufacturing optical fibre An extrnal fibre drawing furnace is maintained at or close to its normal working temperature while contaminants are removed between fibre pulls. Either a removable insert, replaceable gas port assembly, or cleanable gas transfer duct, enable this to be ac... | 01/29/1991 |
| 4952225 | Method of making an internally-doped tube of transparent glass, in particular for manufacturing rare-earth-doped optical fibers A mist is formed by an ultrasonic generator (5) from a liquid solution containing a dopant, and the mist is inserted into the tube blank to be doped (4) by means of a flexible pipe (2) in order to deposit microdrops on the inside surface of said tube blan... | 08/28/1990 |
| 4594086 | Method and apparatus for distribution of fibres in a felt The present invention relates to the formation of fibre felts which are produced on centrifugation wheels, the material to be fiberized being conducted to the periphery of these wheels from the outside thereof, and the fibres being carried by gaseous curr... | 06/10/1986 |
| 4589898 | Method of cleaning heat transfer fins A method of cleaning glass volatile contaminants from the surfaces of heat transfer fins in a fin cooler of a glass fiber forming bushing assembly is disclosed. A cleaning liquid which is a dilute alcohol solution in which the alcohol is selected from the... | 05/20/1986 |
| 4385915 | Removal of germanium from the effluent of processes for the production of optical components Recovery of germanium from the effluent of optical fiber manufacturing processes depends on the realization that the germanium is to a substantial extent in gaseous form. Thus, to separate the germanium effectively appropriate measures are taken to separa... | 05/31/1983 |
| 4298367 | Method of and device for cleansing in a fibre blanket manufacturing plant In a plant of making a blanket from fibres which are thrown or set together with polymerizable binder particles or droplets onto a perforated conveying belt, a method of cleansing consisting in: associating means for sucking air loaded with fibre dust and... | 11/03/1981 |
| 4230471 | Suppression of pollution in mineral fiber manufacture Methods and equipment are disclosed for production of mineral fibers, by attenuation, involving the use of a substantial volume of gas, in which water is also employed at least in a fiber binder, the methods and equipment providing for recirculation of mo... | 10/28/1980 |
| 4052183 | Method and apparatus for suppression of pollution in toration of glass fibers Method and apparatus for the production of fibrous materials from attenuable substances, particularly molten glass, are disclosed, along with the fiber products which result. In the disclosed system the material to be fiberized flows into a region establi... | 10/04/1977 |
