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| Number | Title | Issue Date |
| 7823416 | Glass composition and method for producing glass article The glass composition of the present invention is an inorganic glass composition in which the volume ratio of helium with a mass number of 3 to helium with a mass number of 4, namely 3He/4He in the glass (0° C., 1 atm) is smaller than the volu... | 11/02/2010 |
| 7730744 | Process for producing glass and glass-melting apparatus thereof A process for producing a high-quality glass from highly reactive raw materials and a glass-melting apparatus for use therewith, comprising the step of charging a material for the glass to a molten glass in a heated vessel, (1) wherein an oxidizing gas is bubbled in... | 06/08/2010 |
| 7584632 | Method of increasing the effectiveness of a fining agent in a glass melt Feed materials are melted in a furnace to form a glass melt at a first temperature T1, the glass melt containing at least one fining agent. The glass melt is cooled to a second temperature T2 less than T1, and an oxygen-containing ga... | 09/08/2009 |
| 7497094 | Glass melting furnace and method for producing glass A charged glass raw material B is melted in a melting tank 10 by heating with a burner 31 and by heating with electrodes 12, to form molten glass G. Then, the molten glass G flows into a tank additionally provided as a noble gas dissolving tank ... | 03/03/2009 |
| 7451621 | Bubble formation in liquid such as molten glass Bubbles of uniform diameter of 0.5 to 4 cm of gas such as helium are formed and pass into liquid such as molten glass by accumulating a sufficient volume of gas through a flow restriction into a space upstream of the point of injection at a controlled flow rate.... | 11/18/2008 |
| 7448231 | Process for preparing batch materials for the manufacture of glass The invention relates to a process for manufacturing compounds based on one or more silicates of alkali metals and/or of alkaline-earth metals, optionally in the form of mixed silicates that combine at least two of these elements, said process involving: | 11/11/2008 |
| 7296441 | Device and method for melting a substance with the occurrence of a low level of contamination The invention relates to an apparatus and a method for low-contamination melting of high-purity, aggressive and/or high-melting glass or glass-ceramic. According to the invention, for this purpose a melt is heated in a crucible or melting skull crucible by means of ... | 11/20/2007 |
| 7225643 | Recirculation bubbler for glass melter apparatus A gas bubbler device provides enhanced recirculation of molten glass within a glass melter apparatus. The bubbler device includes a tube member disposed within a pool of molten glass contained in the melter. The tube member includes a lower opening through which the... | 06/05/2007 |
| 7191619 | Process for producing glass and glass-melting apparatus thereof A process for producing a high-quality glass from highly reactive raw materials and a glass-melting apparatus for use therewith, comprising the step of charging a material for the glass to a molten glass in a heated vessel, (1) wherein an oxidizing gas is bubbled in... | 03/20/2007 |
| 7040122 | Process for production of molten glass The invention concerns a process and a device from the production of molten glass. According to the invention, measures will be taken to lead the current of the molten glass through the tank furnace so that cutoffs of the glass current between the surface of ... | 05/09/2006 |
| 7024888 | Method for changing glass compositions in melting installations, and corresponding melting installation The invention relates to a method for changing glass compositions in continuously operated melting installations which has a significantly shortened melt changeover time and therefore lower costs and in which the glass quality is not adversely affected. ... | 04/11/2006 |
| 7021082 | Method and apparatus for suppressing oxygen bubble formation in glass melts In the method of making glass a glass melt is formed from starting materials in a melt apparatus, which includes at least one metal part having a metal surface in contact with the glass melt in a first region of the glass melt having a predetermined oxygen partial p... | 04/04/2006 |
| 7010940 | Process for producing glass and glass-melting apparatus thereof A process for producing a high-quality glass from highly reactive raw materials and a glass-melting apparatus for use therewith, comprising the step of charging a material for the glass to a molten glass in a heated vessel, (1) wherein an oxidizing gas is bubbled in... | 03/14/2006 |
| 6945077 | Method for treating steel plant slag A method is presented for the treatment of slag from electric steel plants which comprises the following steps: (a) transference of the slag into a metallurgical receptacle; (b) defoaming of the slag in this metallurgical receptacle by adding a defoaming agent, pref... | 09/20/2005 |
| 6912874 | Device and process for introducing gases into a hot medium This invention relates to a device and a process for introducing gases into a hot medium, whereby device (1) contains a pipe (2) for introducing gas and a cooling jacket (3) that encases pipe (2). ... | 07/05/2005 |
| 6883349 | Method for preparing raw materials for glass-making The subject of the invention is a process for manufacturing compounds based on one or more silicates of alkali metals, such as Na and K and/or alkaline earth metals such as Ca, Mg, and/or on rare earths, such as Ce, optionally in the form of mixed silicates which co... | 04/26/2005 |
| 6871514 | Method of making glass, a method and device for the control and setting of the redox state of redox fining agents in a glass melt There is now provided a method and a device for the control and setting of the redox state of redox fining agents in a glass melt, in which method, during the melting process, essentially oxygen gas is blown through the glass melt. ... | 03/29/2005 |
| 6854291 | Method for nozzle-injection of gas into molten glass A method and device for nozzle-injection of gas into molten glass is disclosed wherein a gas stream is introduced into the molten glass in a temporally pulsed throughput such that the gas stream is interrupted between two sequential pulses, the duration of each puls... | 02/15/2005 |
| 6722161 | Rapid glass melting or premelting A method for melting glass forming batch material includes charging the glass forming batch material to a glass melting apparatus; impinging a flame proximate to the surface of the batch materials to form a glass melt from the batch material; and bubbling the glass ... | 04/20/2004 |
| 6588231 | Method molding a glass composition into an optical element with reduced pull-out A mold has a moling surface of a material containing silicon carbide and/or silicon nitride as a main component and a carbon thin film formed on the molding surface to prevent fusion sticking. A glass substance which has a sag point not higher than 565° ... | 07/08/2003 |
| 6588234 | Device and method of plaining glasses or glass-ceramics A device and method for the plaining of glasses or glass-ceramics. The device is provided with a melting vat, at least two plaining containers serially connected after the outlet of the melting vat, and at least one of the plaining containers is built in ... | 07/08/2003 |
| 6576807 | Method and apparatus for incinerating and vitrifying of waste, in particular radioactive waste The present invention provides a method of processing organic waste (D) in divided solid and/or liquid form, the method being implemented in a single reactor (1) containing a bath of molten gas (V) surmounted by a gas phase (G), the method comprising inci... | 06/10/2003 |
| 6460376 | Method and device for melting and refining materials capable of being vitrified A process for melting and refining vitrifiable materials. In this method all or part of the thermal energy necessary for melting the vitrifiable materials is supplied by the combustion of fossil fuel with at least one oxidizer gas, the fuel, gas or the ga... | 10/08/2002 |
| 6334337 | Air bubbler to increase glass production rate In a glass melter, a precious metal insert is used to protect a gas bubbler from corrosion at the orifice of the bubbler through which gas is injected into the melt. The use of a precious refractory metal insert at the bubbler orifice prevents the attack ... | 01/01/2002 |
| 6237369 | Roof-mounted oxygen-fuel burner for a glass melting furnace and process of using the oxygen-fuel burner Briefly, according to the present invention there is provided a refractory lined glass melter for producing refined glass from raw glass-forming material using at least one oxygen-fuel burner recessed within a burner block mounted in the roof of the furna... | 05/29/2001 |
| 6094942 | Method and apparatus for reducing tin defects in float glass The present invention provides a method of reducing tin defects in flat glass made by the float process. In the float process, molten glass is delivered onto a pool of molten tin within an enclosed chamber and formed into a glass ribbon. Oxygen gas dissol... | 08/01/2000 |
| 5922097 | Water enhanced fining process a method to reduce toxic emissions from glass melting furnaces A method of glass formation which provides for reduced levels of toxic emissions is disclosed wherein conventional batch fining agents such as Na2 SO4, As2 O5 or Sb2 O5 are used in lesser a... | 07/13/1999 |
| 5868814 | Apparatus for recirculating molten glass A molten glass recirculating apparatus is provided, comprising a riser chamber having a first opening positioned below a molten glass level and a second opening positioned above a molten glass level, a trough positioned adjacent the upper opening, and a g... | 02/09/1999 |
| 5776221 | Method for delivering a glass stream for forming charges of glass A method for delivering a glass stream having a first inner layer and a second outer layer, including a generally vertical orifice, and delivering glass from a second source such that the glass from the second source provides an outer layer about the glas... | 07/07/1998 |
| 5766296 | Furnace for melting glass and method for using glass produced therein A furnace (1) for melting vitrifiable materials, including a compartment (2) for melting and refining the glass equipped, upstream, with at least one means (4) for charging vitrifiable-materials and leading, downstream, into a compartment or a series or c... | 06/16/1998 |
| 5728190 | Melting furnace and process for the inertization of hazardous substances by vitrification A tank furnace for the inertization of non-flammable batch, which contains hazardous substances, metals and less than 10% by weight of carbon, by vitrification with glass forming aggregates by producing a glassy melt. The furnace has a batch charging devi... | 03/17/1998 |
| 5683484 | Method and apparatus for separating out gall during glass melting processes An electrically heated tank furnace is used to melt glass whereby a floating gall layer is formed on the melt, in particular during the vitrification of hazardous materials such as asbestos, fly ash, filter dust, whereby the tank of the furnace is fitted ... | 11/04/1997 |
| 5665137 | Method for controlling secondary foam during glass melting A method for controlling secondary foam in a glass melting process is provided in which an oxidizing agent is added to a second melt region (32) of a glass furnace (14) where secondary foam (52) is formed. The oxidizing agent may be supplied directly to t... | 09/09/1997 |
| 5588978 | Process and apparatus for coloring glass A method and apparatus for the production of colored glass includes the steps of diverting a stream of clear molten glass from at least one glass melting furnace through one or more transport channels to a color treatment chamber. Recycled cullet and colo... | 12/31/1996 |
| 5586999 | Method for producing glass with lower alkali content A method for producing lower alkali glass wherein fluxing activity provided by alkali oxides is partly replaced by fluxing activity provided by water in the glassmaking process. Water is effectively and efficiently provided to the glass by the establishme... | 12/24/1996 |
| 5536291 | Method for melting glass in and a glass melting furnace for the practice of the method In a furnace for melting glass, a preheating zone, a melting zone, a refining zone with a refining bank raised above the rest of the floor and an homogenizing zone, are arranged lengthwise behind one another between the charging end for the glass raw mate... | 07/16/1996 |
| 5364426 | High shear mixer and glass melting method A glass melter 30 having a mixing impeller 34 for converting a feed stream 38 supplied to a vessel 32 into a vitrified glass melt 50. Heating means such as electrodes 36 or a gas burner 58 are used to heat the glass melt 50. Electrode 36 arrangements are ... | 11/15/1994 |
| 5327452 | Forehearth A forehearth for a glass furnace comprises a trough and roof over the trough, the roof having two longitudinal ridges extending downwardly towards the surface of the glass to define three longitudinal chambers. The central chamber forms a conduit for the ... | 07/05/1994 |
| 5188649 | Process for vitrifying asbestos containing waste, infectious waste, toxic materials and radioactive waste Material, such as, for example, sealed double bags of asbestos containing waste or ash from infectious waste or toxic material or radioactive waste, is transferred into a glass melt of a furnace. Gas bubbles released into the melt form a gas curtain which... | 02/23/1993 |
| 5147438 | Auxiliary oxygen burners technique in glass melting cross-fired regenerative furnaces The invention relates to the employment of at least one oxygen-fuel burner in a particular manner in glass melting cross-fired regenerative furnaces. By operating oxygen-fuel burners positioned in particular places in a cross-fired regenerative furnace in... | 09/15/1992 |
