Repairing Or Cleaning Of Apparatus; Or Batch Dust Prevention Or Control Patents (Class 65/27)
  • Patent number: 11130696
    Abstract: A method for reconditioning a glass manufacturing system includes establishing a reducing atmosphere in a glass melting vessel and draining a glass melt composition from the melting vessel while the reducing atmosphere is in the vessel. The pressure of the reducing atmosphere is greater than the pressure of the atmosphere surrounding the melting vessel and the reducing atmosphere is established by operating at least one combustion burner in the melting vessel in a fuel-rich condition.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: September 28, 2021
    Assignee: Corning Incorporated
    Inventors: Sean Thomas Anderson, Gilbert De Angelis, Megan Aurora DeLamielleure, Miki Eugene Kunitake, Derwin Lee Lamberson
  • Patent number: 10974983
    Abstract: A molten glass stirring device is provided that includes a container having an inlet through which molten glass flows in and an outlet through which molten glass flows out and a stirring mechanism having a vertically extending rotational shaft and an impeller provided on the rotational shaft to stir molten glass in the container. The molten glass stirring device further includes at least one of a first variable mechanism capable of adjusting the spacing between the impeller in the molten glass and the inner surface of the container by changing the horizontal position of the rotational shaft and a second variable mechanism capable of adjusting the spacing between the impeller in the molten glass and the surface of the molten glass by changing the vertical position of the rotational shaft.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: April 13, 2021
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventor: Shusuke Okamoto
  • Patent number: 10759688
    Abstract: A submerged combustion melting system (90) includes a submerged combustion melter (100) having a housing with one or more side walls (104), a floor (106), and a ceiling (108) which at least partially define a melt chamber (110). The melter has one or more main burners (128) positioned along the floor of the housing and an oxygen/gas burner in a preheat burner system (300) removably attached to one of the sidewalls or the ceiling, the oxygen/gas burner arranged such that a flame from the oxygen/gas burner is directed downward into the melt chamber.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: September 1, 2020
    Assignee: Owens Corning Intellectual Capital, LLC
    Inventors: James Alan MacPhee, Steven James Mighton, Daniel A. Ertl
  • Patent number: 9227865
    Abstract: Methods and systems produce a molten mass of foamed glass in a submerged combustion melter (SCM). Routing foamed glass to a fining chamber defined by a flow channel fluidly connected to and downstream of the SCM. The flow channel floor and sidewalls have sufficient glass-contact refractory to accommodate expansion of the foamed glass as fining occurs during transit through the fining chamber. The foamed glass is separated into an upper glass foam phase and a lower molten glass phase as the foamed glass flows toward an end of the flow channel distal from the SCM. The molten glass is then routed through a transition section fluidly connected to the distal end of the flow channel. The transition section inlet end construction has at least one molten glass inlet aperture, such that the inlet aperture(s) are positioned lower than the phase boundary between the upper and lower phases.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: January 5, 2016
    Inventors: Jeffrey M Shock, Aaron Morgan Huber
  • Publication number: 20140230490
    Abstract: Methods are disclosed for treating zircon-containing forming structures, e.g., zircon isopipes, with one or more treatment glass compositions in which defect-causing reactions between the zircon of the forming structure and molten glass are suppressed at the delivery temperature of the treatment glass. The treatment compositions can be used during start-up of a forming structure, between runs of the same production glass on a given forming structure, and/or when transitioning between runs of two production glasses on a given forming structure. The treatment compositions can be used with production glasses that are ion-exchangeable.
    Type: Application
    Filed: April 29, 2014
    Publication date: August 21, 2014
    Applicant: CORNING INCORPORATED
    Inventors: Adam James Ellison, Timothy James Kiczenski, John Christopher Mauro
  • Publication number: 20140090419
    Abstract: Apparatus including a flow channel defined by a floor, roof, and sidewall structure connecting the floor and roof. One or more combustion burners is positioned in either the roof, the sidewall structure, or both, and transfer heat to a molten mass of glass containing bubbles having a bubble atmosphere flowing through the flow channel. The burners contribute to formation of a channel atmosphere above the molten glass. Apparatus includes a device, at least a portion of which is positionable under a level of the molten glass in the flow channel, configured to emit a composition into the molten glass under the level to intimately contact the composition with the molten glass and bubbles therein. The composition diffuses into the bubbles to form modified atmosphere bubbles sufficiently different from the channel atmosphere to increase diffusion of a species in the channel atmosphere into the modified atmosphere bubbles.
    Type: Application
    Filed: October 3, 2012
    Publication date: April 3, 2014
    Applicant: JOHNS MANVILLE
    Inventors: Mark William Charbonneau, Kevin Patrick McHugh
  • Patent number: 8641178
    Abstract: An ink recirculation system has been developed to enable controlled release of ink collected in an ink receptacle into a printhead. The ink receptacle includes an indentation in a substantially planar surface and is configured to receive ink in the indentation from a printhead. The indentation has a shape that enables the ink receptacle to release ink at varying rates as a pivot angle of the ink receptacle is varied by a positioning system. The shape of the indentation enables the receptacle to dose ink into an ink reservoir in the printhead at known rates to control the amount of ink recycled to the printhead.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: February 4, 2014
    Assignee: Xerox Corporation
    Inventors: Trevor J. Snyder, Isaac S. Frazier
  • Patent number: 8613806
    Abstract: In the formation of sheet material from molten glass, molten glass is formed in a melting furnace and transported through a precious metal delivery system to the forming apparatus. Disclosed herein is a method to mitigate carbon contamination of individual components of the precious metal delivery system prior to and/or during their use. The method involves positioning an oxygen generating material within portions of a precious metal component, and may comprise one or more heat treating steps of the component in an oxygen-containing atmosphere.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: December 24, 2013
    Assignee: Corning Incorporated
    Inventors: William G. Dorfeld, Susan L. Schiefelbein
  • Patent number: 8505336
    Abstract: A refractory composition includes a first set of components and a colloidal silica binder. The first set of components includes alumina and zirconia. The colloidal silica binder is provided at 5 wt % to 20 wt % of the dry weight of the first set of components. The refractory composition includes 45 wt % to 75 wt % alumina, 15 wt % to 30 wt % zirconia, and 10 wt % to 30 wt % silica.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: August 13, 2013
    Assignee: Magneco/Metrel, Inc.
    Inventors: Charles W. Connors, Sr., Michael W. Anderson, Shirish Shah
  • Patent number: 8505335
    Abstract: A refractory system includes a first set of components and a colloidal silica binder. The first set of components includes alumina and zirconia. The colloidal silica binder is at 5 wt % to 20 wt % of the dry weight of the first set of components. The refractory composition comprises 10 wt % to 45 wt % alumina, at least 35 wt % zirconia, and at least 20 wt % silica.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: August 13, 2013
    Assignee: Magneco/Metrel, Inc.
    Inventors: Charles W. Connors, Sr., Michael W. Anderson, Shirish Shah
  • Patent number: 8484995
    Abstract: Glass manufacturing apparatuses with particulate removal devices and methods for using the same are disclosed. In one embodiment, a fusion draw machine for forming a glass web from molten glass includes an enclosure and a first pull roll and a second pull roll rotatably positioned in an interior of an enclosure. The first pull roll and the second pull roll cooperate to draw a glass web in a draw direction. A particulate removal device for removing particulate matter from the interior of the enclosure is fluidly coupled to the enclosure and includes a vacuum nozzle disposed in the interior of the enclosure and fluidly coupled to a vacuum source with a vacuum line. A particulate filter is fluidly coupled to the vacuum nozzle and the vacuum source and traps particulate matter exhausted from the interior of the enclosure through the vacuum nozzle.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: July 16, 2013
    Assignee: Corning Incorporated
    Inventors: Robert Delia, Ahdi El Kahlout
  • Publication number: 20130055764
    Abstract: A crystal growth furnace is disclosed herein and includes a top cover, a body and a bottom portion. The top cover is configured to be moved by a top cover shifting mechanism. The body is configured to be moved vertically by a body shifting mechanism. The bottom portion is configured to be moved from the bottom of the crystal growth furnace by a bottom portion shifting mechanism and used to carry a crucible. When the top cover, the body and the bottom portion are connected together to be the crystal growth furnace, a silicon material disposed within the crucible is grown to be an ingot.
    Type: Application
    Filed: September 6, 2011
    Publication date: March 7, 2013
    Applicant: REAL GREEN MATERIAL TECHNOLOGY CORP.
    Inventor: Wen-Yuan Chang
  • Publication number: 20120324950
    Abstract: Disclosed is an apparatus and method for heat treating glass sheets, and in particular for heat treating very thing glass sheets arranged in closely spaced stacks. The glass sheets are positioned on a moving belt such that their major surfaces are substantially perpendicular to a direction of belt travel through the apparatus to aid in producing a uniform temperature profile within the glass sheets. The apparatus comprises air curtains positioned at the inlet and outlet of the apparatus to minimize the ingress of particulate into the apparatus. A reduced velocity of heated air flow within a lower portion of the apparatus relative to a velocity of the heated air in an upper portion of the apparatus causes particulate to drop out of the lower portion air flow. A rotating brush and vacuums positioned adjacent a lower portion of the belt assist in removing particulate from the moving belt.
    Type: Application
    Filed: May 16, 2012
    Publication date: December 27, 2012
    Inventors: George O. Dale, Juergen Tinz
  • Publication number: 20120131956
    Abstract: Glass manufacturing apparatuses with particulate removal devices and methods for using the same are disclosed. In one embodiment, a fusion draw machine for forming a glass web from molten glass includes an enclosure and a first pull roll and a second pull roll rotatably positioned in an interior of an enclosure. The first pull roll and the second pull roll cooperate to draw a glass web in a draw direction. A particulate removal device for removing particulate matter from the interior of the enclosure is fluidly coupled to the enclosure and includes a vacuum nozzle disposed in the interior of the enclosure and fluidly coupled to a vacuum source with a vacuum line. A particulate filter is fluidly coupled to the vacuum nozzle and the vacuum source and traps particulate matter exhausted from the interior of the enclosure through the vacuum nozzle.
    Type: Application
    Filed: November 29, 2010
    Publication date: May 31, 2012
    Inventors: Robert Delia, Ahdi El Kahlout
  • Publication number: 20120073326
    Abstract: In the formation of sheet material from molten glass, molten glass is formed in a melting furnace and transported through a precious metal delivery system to the forming apparatus. Disclosed herein is a method to mitigate carbon contamination of individual components of the precious metal delivery system prior to and/or during their use. The method involves positioning an oxygen generating material within portions of a precious metal component, and may comprise one or more heat treating steps of the component in an oxygen-containing atmosphere.
    Type: Application
    Filed: March 29, 2011
    Publication date: March 29, 2012
    Inventors: William G. Dorfeld, Susan L. Schiefelbein
  • Publication number: 20110296874
    Abstract: A process for manufacturing a hollow glass product using an I.S. machine and a robot that can move alongside blank molds of the I.S. machine, wherein the robot is capable of replacing one or more blank molds, section after section. The I.S. machine for manufacturing hollow glass products includes a robot that can move alongside the blank molds, and the robot is capable of carrying plural tools having different functions, simultaneously and/or alternately, chosen from an electromagnet, and/or a spray tube for greasing by spraying, and/or an optical pyrometer, an infrared or equivalent viewing port, and/or a rotary abrasive tool, and/or a camera or equivalent.
    Type: Application
    Filed: November 9, 2009
    Publication date: December 8, 2011
    Applicant: SAINT-GOBAIN EMBALLAGE
    Inventors: Samuele Ghione, Evelino Zanella
  • Publication number: 20110192196
    Abstract: Corrosion of the inner surface of the crown of a glassmelting furnace is reduced or avoided by directing at low velocity along that surface a gaseous stream comprising water vapor, or comprising the combustion products of an oxy-fuel burner operated at a stoichiometric ratio of at least 1.0, or the combustion products of a burner operated at a stoichiometric ratio less than 1.0, or by injecting into the furnace interior a gaseous reactant which reacts with alkali species in said space.
    Type: Application
    Filed: April 14, 2011
    Publication date: August 11, 2011
    Inventors: Kuang-Tsai WU, Hisashi Kobayashi
  • Publication number: 20110192197
    Abstract: The invention relates to methods and to devices for a melting furnace, or for the conveying lines of the product to be melted, having an infinite life (furnace campaign). The same is achieved by means of the continuous/periodic, e.g. cyclic, exchange, in the optimum case, of all of the components surrounding the furnace interior/melting space, or surrounding the conveying lines, in that the components can be arranged/placed next to each other in a modular manner and that said components move in a certain direction while new individual parts are added at one of the free ends of the respective assembly and while worn/used individual parts are removed at the other free end of the respective assembly. For this purpose the individual components are held and/or moved by suitable receptacles, wherein the furnace interior/melting chamber remains stationary.
    Type: Application
    Filed: October 5, 2009
    Publication date: August 11, 2011
    Inventor: Uwe Geib
  • Publication number: 20110185769
    Abstract: Corrosion of the inner surface of the crown of a glassmelting furnace is reduced or avoided by directing at low velocity along that surface a gaseous stream comprising water vapor, or comprising the combustion products of an oxy-fuel burner operated at a stoichiometric ratio of at least 1.0, or the combustion products of a burner operated at a stoichiometric ratio less than 1.0, or by injecting into the furnace interior a gaseous reactant which reacts with alkali species in said space.
    Type: Application
    Filed: April 14, 2011
    Publication date: August 4, 2011
    Inventors: Kuang-Tsai Wu, Hisashi Kobayashi
  • Publication number: 20100011812
    Abstract: A glass forming apparatus and a glass forming method of high economical merit and high production efficiency are provided. More specifically, the glass forming apparatus has dies, in which at least one die is divided into a heat exchange unit and a press unit, and in the glass forming apparatus and glass forming method, the plane precision is improved in the contact dividing surfaces of the heat exchange unit and the press unit. A glass forming apparatus includes a die having a press surface for pressing a glass material, in which the die has a plurality of dies, and at least one die is divided into a heat exchange unit and a press unit. Preferably, the surface precision of at least one part of each dividing surface in contact with the heat exchange unit and the press unit has a flatness (PV) of 500 ?m or less, and the plane precision of at least one part of the dividing surface has a surface roughness (Ra) of 100 ?m or less.
    Type: Application
    Filed: September 29, 2009
    Publication date: January 21, 2010
    Applicant: OHARA INC.
    Inventor: Moriji Nozaki
  • Publication number: 20090241601
    Abstract: A glassware manufacturing method and machine, whereby the inner surfaces of the molds of the various forming sections of the machine are treated using a common processing member, and the exhaust substances produced by the treatment are aspirated simultaneously with or at a predetermined time during the treatment by a suction device having at least one suction hood associated with the processing member.
    Type: Application
    Filed: March 25, 2009
    Publication date: October 1, 2009
    Applicant: BOTTERO S.p.A
    Inventor: Mario Balbi
  • Publication number: 20090084136
    Abstract: The present invention provides a molding die for molding glass, which includes a base member, on which a first buffer layer and a protective film are provided in order. The first buffer layer is made of titanium or any material which is easily attacked by a first attack solution. The first attack solution includes hydrofluoric acid. The protective film is made of platinum-iridium alloy, iridium-rhenium alloy, tantalum-ruthenium alloy, molybdenum-ruthenium alloy, molybdenum-rhenium alloy, or molybdenum-hafnium alloy. The method of repairing the molding die includes using the first attack solution to remove the first buffer layer that causes no damage on the base member, and then operating a sputtering process to build a new first buffer layer and a new protective layer on the base member.
    Type: Application
    Filed: October 20, 2007
    Publication date: April 2, 2009
    Inventors: CHUN-YAN ZHANG, TSUNG-HSIEN LIN, YUNG-I CHEN, CHAO-CHI CHANG
  • Publication number: 20090038342
    Abstract: A molten glass delivery system is modified to match it with the overflow downdraw process. A substantial number of defects not removed by the finer are diverted to the unusable inlet and distal edges of the sheet. In one embodiment, the stirring device is relocated from the outlet to the inlet of the finer. In another embodiment, the basic shape of the finer is preferably changed from a cylindrical shape to a Double Apex (or Gull Wing) shaped cross-section, whereby the apexes of the finer contain the glass that will form the unusable inlet end of the glass sheet. The finer vent or vents are preferably located at these apexes such that any homogeneity defects caused by the vents are diverted to the unusable inlet end of the glass sheet. The finer cross-section has a high aspect ratio for increased fining efficiency as compared to a cylindrical finer.
    Type: Application
    Filed: March 28, 2008
    Publication date: February 12, 2009
    Inventor: Richard B. Pitbladdo
  • Patent number: 7373791
    Abstract: The present invention provides method of contemporaneously forming a particulate glass batch composition and reducing volatile components in an exhaust stream, comprising the steps of: (a) introducing an exhaust stream comprising one or more volatile components into a mixing chamber; (b) adding a particulate glass batch precursor composition comprising at least one reagent material that is reactive with at least one of the one or more volatile components of the exhaust stream into the mixing chamber; (c) reacting at least a portion of the particulate glass batch precursor composition with at least a portion of the one or more volatile components of the exhaust stream in the mixing chamber to form a particulate glass batch composition and reduce the amount of the one or more volatile components in the exhaust stream; (d) separating the particulate glass batch composition from the exhaust stream; and (e) venting the exhaust stream having a reduced amount of volatile components to the atmosphere.
    Type: Grant
    Filed: March 16, 2000
    Date of Patent: May 20, 2008
    Assignee: PPG Industries Ohio, Inc.
    Inventor: William H. Leehr
  • Patent number: 7272879
    Abstract: A molding die for molding glass and renewal method thereof. The molding die includes a substrate, a nickel-phosphorous alloy layer, with phosphorous content 30 wt % or less, overlying the substrate, an intermediate layer overlying the nickel-phosphorous alloy layer, and a passivation film overlying the intermediate layer.
    Type: Grant
    Filed: July 1, 2004
    Date of Patent: September 25, 2007
    Assignee: Asia Optical Co., Inc.
    Inventor: Jui-Fen Pai
  • Patent number: 7169725
    Abstract: The invention provides a method to transform large quantities of waste glass into useful ceramic products by a low-cost manufacturing process. The method improves green strength compared to previous methods, and does not require water or any other liquid solvent. Only one firing step is needed with a low peak firing temperature of about 700° C.to about 1000° C. The method conserves energy and natural resources compared to clay-based traditional ceramic manufacturing. High-quality impervious ceramic products can be produced by the invention.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: January 30, 2007
    Inventor: Michael J. Haun
  • Patent number: 7055345
    Abstract: An apparatus for manufacturing a glass base material, which is a base material of an optical fiber, comprising: a base rod, around and along which said glass base material is formed; a burner that hydrolyzes and accumulates a gas material, which is a base material of said glass base material, around and along said base rod; a first burner-moving-unit that moves said burner in a direction parallel with a longitudinal direction of said base rod; and a second burner-moving-unit that moves said first burner-moving-unit in a same moving direction of said first burner-moving-unit.
    Type: Grant
    Filed: February 24, 2003
    Date of Patent: June 6, 2006
    Inventors: Yuuji Tobisaka, Tadakatsu Shimada, Hiroshi Machida, Masataka Watanabe, Hiroshi Tsumura, Hideo Hirasawa
  • Patent number: 6763683
    Abstract: A method and furnace are described for producing a fused oxide body by decomposing a precursor compound of the oxide in a flame to form molten oxide particles and collecting those particles in a furnace constructed of a refractory material to form a fused oxide body, the improvement in the method comprising treating the refractory material with a strong acid in liquid form to react with, and thereby remove, contaminants from at least the surface of the refractory material.
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: July 20, 2004
    Assignee: Corning Incorporated
    Inventor: Robert S. Pavlik, Jr.
  • Patent number: 6739156
    Abstract: The present invention is directed to a system and method for delivering liquid reactants through a burner assembly to form soot used in the manufacture of glass, and in particular, optical waveguides. Due to the tendency of liquid reactants to react to form solids when exposed to water in the air, an evaporative liquid is first delivered through the burner assembly to the combustion zone. Once steady state liquid flow has been achieved in the system, the evaporative liquid is transitioned to the liquid reactant. The liquid reactant is delivered along the same path to the burner assembly, which discharges the liquid reactant into the combustion zone as an atomized liquid to form soot used in the manufacture of glass. Once the desired quantity of soot has been formed, the liquid reactant is transitioned back to the evaporative liquid while maintaining steady state flow. After the liquid reactant has cleared the system, flow of the evaporative liquid is terminated and the burner assembly flame turned off.
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: May 25, 2004
    Assignee: Corning Incorporated
    Inventors: Daniel W. Hawtof, John Stone, III, Joseph M. Whalen
  • Patent number: 6619074
    Abstract: An apparatus for the production of a porous optical fiber preform preventing cracks in the preform and stabilizing quality over the longitudinal direction. The apparatus includes a reaction portion, a feed port for introducing a stream of gas, and a main exhaust port. A rotating mechanism is provided for mounting, rotating, and pulling up a seed rod for forming the porous optical fiber preform. A first burner emits a flame carrying fine particles of glass forming the core portion, and a second burner emits a flame carrying fine particles of glass forming the cladding portion. A portion adjusts the flow of the stream from the feed port to the main exhaust port so that the flames carrying the glass particles are not disturbed by the stream and so that the stream does not directly contact a fine glass particle deposit formed at a bottom end of the seed rod.
    Type: Grant
    Filed: August 29, 2000
    Date of Patent: September 16, 2003
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Hiroyuki Wada, Toshihiro Mikami, Akihiro Kanao, Yukio Kohmura
  • Patent number: 6615612
    Abstract: A method and apparatus is taught for preheating of glass batch materials by direct contact with glass furnace exhaust gases. Furnace gases 15 flow through a batch hopper 1 in horizontal tunnels formed by open bottom tubes 6, with a free surface of batch forming the bottom portion of the tunnel. The tubes are electrically grounded and a high voltage discharge electrode 18 is located axially in each tunnel. The corona discharge from the electrode acts to retain batch and prevent it's entrainment into the flowing gases. Particulate matter from the gases is simultaneously precipitated onto the batch surface. Acidic gas components such as SO2, HCl, and HF are chemically reacted with batch constituents, thereby removing them from the gas stream. Heat is transferred from the gases to the batch by direct contact. Cooled gases 16 exit the hopper, cleaned of pollutants to levels in compliance with strict environmental regulations.
    Type: Grant
    Filed: January 18, 2001
    Date of Patent: September 9, 2003
    Inventor: Jeffrey C. Alexander
  • Patent number: 6579380
    Abstract: A method of removing graphite from metal molds used in the glass fabrication industry, the method including placing a metal glass-fabricating mold with graphite bonded thereto in a chamber, providing an oxygen rich mixture of combustible gases in the chamber, said oxygen rich mixture containing from about 10 to about 25% stoichiometric excess of oxygen, and igniting the oxygen rich mixture of combustible gases in the chamber to produce a temperature of at least about 6,000° F. and a pressure wave. A high temperature wave front and the pressure wave thereby produced remove graphite from the metal mold by ablation of the graphite.
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: June 17, 2003
    Assignee: Ablation Technologies Inc.
    Inventors: Terry W. Martin, Alex Maule
  • Patent number: 6574991
    Abstract: An article of relatively pure silica, and a furnace and method of producing the article. The article is produced by collecting molten silica particles in a refractory furnace in which at least a portion of the refractory has been exposed to a halogen-containing gas to react with contaminating metal ions in the refractory.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: June 10, 2003
    Assignee: Corning Incorporated
    Inventors: Robert S. Pavlik, Jr., Lawrence H. Kotacska
  • Patent number: 6560994
    Abstract: Disclosed is a mold including upper and lower molds for obtaining glass optical elements by press molding a glass molding material softened by heat, in which either one of the upper and lower molds is made of a ceramic matrix and the matrix has no surface hole having a diameter of 300 microns or more on the molding surface, and a method for manufacturing glass optical elements using the mold. For example, on the upper mold 21 and the lower mold 22, formed is a &bgr; type silicon carbide having a thickness that a molding surface can be reproduced by grinding and a density of 3.20 g/cm3 or more so as to include at least the molding surface facing a surface of the glass molding material G. The mold according to the invention can be reused even where pullouts occur from repetitive use.
    Type: Grant
    Filed: July 17, 1998
    Date of Patent: May 13, 2003
    Assignee: Hoya Corporation
    Inventor: Shinichiro Hirota
  • Patent number: 6463764
    Abstract: 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 further includes an exhaust filtration system including a PTFE fabric material. The exhaust filtration system is connected to the production system to receive the exhaust stream an capture the particulate material. A collection system is connected to the exhaust system to collect the captured particulate material from the exhaust system. The particulate material collected contains at least about 2% by weight germanium. The invention further includes incorporating the aforementioned apparatus into the operation of a glass manufacturing facility.
    Type: Grant
    Filed: June 6, 2000
    Date of Patent: October 15, 2002
    Assignee: Corning Incorporated
    Inventors: Steven A. Dunwoody, Eric C. Hilton, Richard D. Pace
  • Patent number: 6449986
    Abstract: 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 that the generation of voids may be minimized in a transparent glass preform which is produced by heating the porous glass preform. An inert gas is caused to flow through the burner at a rate of at least 25 m/s before fine glass particles are formed by the hydrolysis and/or oxidation of a glass material in a flame produced by the burner supplied with a mixture of a gas of the glass material and a gas for combustion and are deposited on a rotating starting member. It is desirable to elevate the pressure of the inert gas above the atmospheric pressure by a device connected to the burner by a pipeline, and cause it to flow rapidly through the burner.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: September 17, 2002
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi Sugiyama, Masahiko Matsui, Nobuyuki Hirano, Naoyuki Fukushima, Takao Kabaya
  • Patent number: 6336346
    Abstract: A synthetic silicate pellet is provided having a component(s) of calcium and magnesium, either together or in the alternative. Such pellet is further provided with either an aluminate silicate binder and/or an ion flow catalyst. The synthetic silicate pellet has use as a glass batch component.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: January 8, 2002
    Assignee: Minerals Technologies Inc.
    Inventors: Gary Peter Tomaino, John Albert Hockman
  • Publication number: 20010047666
    Abstract: 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 that the generation of voids may be minimized in a transparent glass preform which is produced by heating the porous glass preform. An inert gas is caused to flow through the burner at a rate of at least 25 m/s before fine glass particles are formed by the hydrolysis and/or oxidation of a glass material in a flame produced by the burner supplied with a mixture of a gas of the glass material and a gas for combustion and are deposited on a rotating starting member. It is desirable to elevate the pressure of the inert gas above the atmospheric pressure by a device connected to the burner by a pipeline, and cause it to flow rapidly through the burner.
    Type: Application
    Filed: November 5, 1999
    Publication date: December 6, 2001
    Inventors: TAKASHI SUGIYAMA, MASAHIKO MATSUI, NOBUYUKI HIRANO, NAOYUKI FUKUSHIMA, TAKAO KABAYA
  • Patent number: 6318127
    Abstract: Provided herewith is a method for preheating a glass mixture to be fed into a glass furnace. The method comprises separately preheating at least some of the materials which comprise the load, and then subsequently remixing the preheated materials and passing the load to the glass furnace.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: November 20, 2001
    Assignees: L'Air Liquide, Societe Anonyme pour l'Etude et, l'Exploitation des Procedes Georges Claude, American Air Liquide, Inc.
    Inventor: Fabien S. Illy
  • Patent number: 6301930
    Abstract: An apparatus and corresponding method for cleaning curved sheets of glass. The apparatus indexes glass sheets in a non-continuous manner through at least a pre-washing zone, a washing zone, a rinsing zone, and/or a drying zone. The glass sheets proceed through any or all of these zones in a substantially upright orientation in certain embodiments. In at least one of the wet zones, a robot arm manipulates a plurality of spray nozzles so as to follow the contour of at least one major surface of the glass. The nozzles may be manipulated back and forth across the surface in order to rinse and/or wash the glass. A similar manipulation of air knives along the contour of the glass sheet may be utilized in the drying zone.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: October 16, 2001
    Assignee: Guardian Industries Corporation
    Inventors: Jeffrey D. Warner, Christopher Wetz, Michael Johnson
  • Publication number: 20010008076
    Abstract: A method and apparatus is taught for preheating of glass batch materials by direct contact with glass furnace exhaust gases. Furnace gases 15 flow through a batch hopper 1 in horizontal tunnels formed by open bottom tubes 6, with a free surface of batch forming the bottom portion of the tunnel. The tubes are electrically grounded and a high voltage discharge electrode 18 is located axially in each tunnel. The corona discharge from the electrode acts to retain batch and prevent it's entrainment into the flowing gases. Particulate matter from the gases is simultaneously precipitated onto the batch surface. Acidic gas components such as SO2, HCl, and HF are chemically reacted with batch constituents, thereby removing them from the gas stream. Heat is transferred from the gases to the batch by direct contact. Cooled gases 16 exit the hopper, cleaned of pollutants to levels in compliance with strict environmental regulations.
    Type: Application
    Filed: January 18, 2001
    Publication date: July 19, 2001
    Inventor: Jeffrey C. Alexander
  • Patent number: 6235666
    Abstract: A high LTa, low UV and IR transmittance grey glass employing as its colorant portion iron (Fe2O3/FeO), erbium (Er2O3) and, optionally, titanium (TiO2). Enhanced effects are achieved by forming separate prebatch mixes, one of which includes rouge, metallic Si (optional), SiO and sand, the other including the remainder of ingredients, which after separate formation are then admixed to form the final, overall batch.
    Type: Grant
    Filed: March 29, 1999
    Date of Patent: May 22, 2001
    Assignee: Guardian Industries Corporation
    Inventors: Gary Seldon Cochran, Anthony Vincent Longobardo, Ksenia Alexander Landa, Leonid Mendel Landa
  • Patent number: 6210082
    Abstract: A method of repairing a diametral surface of a mold of the type used in manufacturing glass containers by an I.S. machine, after a repair procedure that causes or can cause an out-of-roundness condition in the diametral surface. The method, which is applicable to the frusto-conical baffle match surface of a parison mold and to a compound cylindrical and frusto-conical bottom plate engaging surface of a blow mold, involves positioning a mold set with its separable semi-circular molds in end to end contact and contacting the diametral surface to be repaired, while the mold set is stationary, with a rotating reaming tool the tips of the removable blades of which define a surface that is complemental to the surface to be repaired.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: April 3, 2001
    Assignee: Owens-Brockway Glass Container Inc.
    Inventors: Donald J. Connors, Sr., Mark E. Keister
  • Patent number: 6067821
    Abstract: A process for making mineral wool fibers having high-temperature stability consisting essentially of: (a) preparing a mixture containing basalt and a quantity of uncalcined raw bauxite sufficient to provide the resulting fibers with an alumina content of at least 18 weight percent, preferably of from 19 to 23 weight percent; (b) heating the mixture to a temperature sufficient to form a substantially homogeneous melt, e.g., in a cupola furnace using coke in a quantity of from about 11 to 25 percent by weight of the mixture; and (c) forming the melt into fibers. The mixture may optionally contain a flux, e.g., limestone and/or dolomite, such as a flux providing a weight ratio of limestone plus dolomite to basalt of less than about 0.6, e.g., 0.1-0.4. The mixture may also contain slag in a weight ratio of slag:basalt of less than about 1.0, more preferably about 0.6.
    Type: Grant
    Filed: October 7, 1996
    Date of Patent: May 30, 2000
    Assignee: Owens Corning Fiberglas Technology, Inc.
    Inventors: James Roger Jackson, Charles F. Rapp, George D. Baybutt, Harry Pennington
  • Patent number: 5968218
    Abstract: An invert cylinder mechanism for a glass container forming machine of the I.S. type, the invert cylinder mechanism having a piston that is moveable along a rectilinear path between inner and outer positions within an annular housing to cause a cylinder rod attached to the piston to extend from said annular housing and to then retract back into said annular housing. A shock absorber is positioned within a recess of the annular housing with its longitudinal central axis spaced from and extending parallel to the longitudinal central axis of the rod. The shock absorber is engaged by the piston as the piston reaches its outer position to absorb inertial loads as the piston decelerates to a stop at its outer position. The recess has an opening out of alignment with the longitudinal central axis of the installed shock absorber, and the shock absorber is removable through the opening along its longitudinal central axis after first pivoting the shock absorber with respect to the longitudinal central axis of the rod.
    Type: Grant
    Filed: July 31, 1998
    Date of Patent: October 19, 1999
    Assignee: Owens-Brockway Glass Container Inc.
    Inventor: Jack I. Perry
  • Patent number: 5925158
    Abstract: A method for cleaning and recycling protective atmosphere for a float glass facility wherein contaminated protective atmosphere is cooled, preferably while scrubbing out particulates, compressed, and then purified by passage through a bed comprising water selective and hydrogen sulfide selective adsorbents.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: July 20, 1999
    Assignee: Praxair Technology, Inc.
    Inventors: Joseph Alfred Weber, Theodore Fringelin Fisher, Dante Patrick Bonaquist
  • Patent number: 5882372
    Abstract: In a process of making gas laid products by entraining particles at least partially coated with a binder in a gaseous stream, passing the stream through a forming chamber and through a permeable collecting surface where the particles build up to form a product like fiber glass insulation, this invention prevents particles from contacting and building up on the walls of the forming chamber and causing wet spots in the finished product by maintaining a high velocity, high pressure layer of gas close to the exposed surface of the walls of the chamber and moving in the general direction of the gaseous stream. This is accomplished by apparatus including a plurality of plenum boxes forming the walls of the forming chamber with the surface exposed to the gaseous stream having gas directing openings therein. Also, an improved method of applying the binder to the particles is disclosed.
    Type: Grant
    Filed: October 2, 1996
    Date of Patent: March 16, 1999
    Assignee: Johns Manville International, Inc.
    Inventors: Jimmy Gene Brown, Michael Terricks McKibben, Edward Lee Hite, Kenneth Andrew Clocksin
  • Patent number: 5855636
    Abstract: A method for treating cullet before use as a raw material in a glass manufacturing process is disclosed. The method includes providing a bed of cullet; passing hot gases through the bed, the quantity and temperature of gases being sufficient to pyrolyze odor creating impurities within the bed of cullet; entraining volatile products of pyrolysis into gases leaving the moving bed; heating the gases leaving the bed to oxidize odor creating impurities; and discharging the gases to the atmosphere. The apparatus includes a housing containing a moving bed of cullet; a source of hot gases which permits the gases to pass through the moving bed of cullet to pyrolyze odor creating impurities within the cullet and entrain volatile products of pyrolysis into gases leaving the moving bed; and an incinerator to remove odor creating impurities from gases leaving the moving bed.
    Type: Grant
    Filed: December 12, 1995
    Date of Patent: January 5, 1999
    Assignee: Edmeston AB
    Inventor: Jeffrey C. Alexander
  • Patent number: 5855639
    Abstract: Provided is a process for the production of a loop-shaped flame in a glass furnace. The furnace includes, in a rear part, a glass melting zone heated by injecting through at least one port a fuel gas and an oxidizer gas having more than 50 vol % of oxygen and, in a front part, a glass refining zone. The process involves defining a stoichiometry coefficient Ks of the flame in the melting zone or the refining zone according to the following formula: ##EQU1## The oxidizer gas and the fuel gas injected through at least the first port are adjusted to obtain a stoichiometry coefficient Ks in the glass melting zone equal to at most 0.8. A fuel-oxidizer mixture is injected into the refining zone to obtain a stoichiometry coefficient Ks in the refining zone which is greater than the stoichiometry coefficient Ks in the melting zone and which is between 0.8 and 1.5. An oxidizer gas is injected into the melting zone in the vicinity of a fume discharge zone to obtain a quantity of oxygen in the fumes of between 0.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: January 5, 1999
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et Exploitation des Procedes Georges Claude
    Inventors: Lahcen Ougarane, Thierry Legiret
  • Patent number: 5840093
    Abstract: The instant invention provides a method of controlling the accumulation of sodium sulfate in the checker packing of a regenerator of a cross-fired regenerative-type glass melting furnace. Typically, glass batch materials are melted within the furnace by combustion of fuel. This combustion produces exhaust gas that is drawn through the regenerator and heats the checker packing. During the melting operation, sodium sulfate gas is formed by the melted glass and is carried with the exhaust gas through the regenerator. The sodium sulfate gas may condense on a portion of the checker packing. As the sodium sulfate condensate accumulates on the checker packing, it may restrict the flow of exhaust gas and/or combustion air through the regenerator.
    Type: Grant
    Filed: December 6, 1996
    Date of Patent: November 24, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Yih-Wan Tsai, Walter W. Scott