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4730results about "Glass furnace apparatus" patented technology
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Flat float glass
InactiveUS6846760B2High degreeLess sensitiveGlass furnace apparatusGlass rolling apparatusArsenic oxideTransmittance
This invention relates to a flat float glass that can be prestressed or transformed into a glass ceramic with high quartz mixed crystals or keatite mixed crystals. To eliminate undesirable surface defects during floating and to achieve superior characteristics of the glass or of he glass ceramic, in particular with regard to a low coefficient of thermal expansion and high light transmittance, the glass has a concentration of less than 300 ppb Pt, less than 30 ppb Rh, less than 1.5 wt. % ZnO and less than 1 wt. % SnO2, and is refined during melting without the use of the conventional fining agents arsenic oxide and / or antimony oxide.
Owner:SCHOTT AG
Submerged combustion melter
InactiveUS20110236846A1Increase melter efficiencyReduce bypassCharging furnaceGlass furnace apparatusCombustorEngineering
A submerged combustion melter having a plurality of side walls, a bottom wall adjacent the side walls, and a top wall adjacent the side walls, the walls collectively enclosing a melting chamber, and the bottom wall forming a plurality of openings, each of which is adapted to receive a submerged combustion burner. Each of the submerged combustion burners is positioned at least 4 inches from the side walls, at least twice as far apart from each other as the distance between the submerged combustion burners and the side walls, and less than or equal to about 20 inches apart.
Owner:GAS TECH INST
Fining of boroalumino silicate glasses
ActiveUS20060293162A1Pot furnacesGlass furnace apparatusActive-matrix liquid-crystal displaySilicate glass
Glasses are disclosed which can be used to produce substrates for flat panel display devices, e.g., active matrix liquid crystal displays (AMLCDs). The glasses have MgO concentrations in the range from 1.0 mole percent to 3.0 mole percent and Σ[RO] / [Al2O3] ratios greater than or equal to 1.00, where [Al2O3] is the mole percent of Al2O3 and Σ[RO] equals the sum of the mole percents of MgO, CaO, SrO, and BaO. These compositional characteristics have been found to improve the melting properties of batch materials used to produce the glass, which, in turn, allows the glasses to be fined (refined) with more environmentally friendly fining agents, e.g., tin as opposed to arsenic and / or antimony.
Owner:CORNING INC
Self-cooled oxygen-fuel burner for use in high-temperature and high-particulate furnaces
InactiveUS6123542AAvoiding particulate inspiration.TheControl expansionGlass furnace apparatusGlass melting apparatusParticulatesCombustor
A self-cooled oxidant-fuel burner consisting novel fuel and oxidant nozzles and three compartment refractory burner block design is proposed. The new oxidant-fuel burner can fire in high-temperature (2200 DEG F. to 3000 DEG F.) and high-particulate (or high process volatiles / condensates) furnaces without over-heating or causing chemical corrosion damage to it's metallic burner nozzle and refractory burner block interior. Using various embodiments of nozzle and block shape, the burner can offer a traditional cylindrical flame or flat flame depending on the heating load requirements. The new features of this burner include unique fuel nozzle design for the streamline mixing of fuel and oxidant streams, a controlled swirl input to the oxidant flow for desired flame characteristics, a controlled expansion of flame envelope in the radial and axial dimensions, and efficient sweeping of burner block interior surface using oxidant to provide convective cooling and prevent any build up of process particulates. In addition, a relatively thick wall metallic nozzle construction with heat conduction fins enable efficient heat dissipation from the nozzle tip and providing a maintenance free burner operation.
Owner:LAIR LIQUIDE SA POUR L ETUD ET LEXPLOITATION DES PROCEDES GEORGES CLAUDE +1
Flat float glass
InactiveUS20020023463A1High degreeLess sensitiveGlass furnace apparatusGlass rolling apparatusArsenic oxideThermal expansion
This invention relates to a flat float glass that can be prestressed or transformed into a glass ceramic with high quartz mixed crystals or keatite mixed crystals. To eliminate undesirable surface defects during floating and to achieve superior characteristics of the glass or of he glass ceramic, in particular with regard to a low coefficient of thermal expansion and high light transmittance, the glass has a concentration of less than 300 ppb Pt, less than 30 ppb Rh, less than 1.5 wt. % ZnO and less than 1 wt. % SnO2, and is refined during melting without the use of the conventional fining agents arsenic oxide and / or antimony oxide.
Owner:SCHOTT AG
Process and apparatus for uniform combustion within a molten material
A submerged combustion burner having co-axial fuel and oxidant tubes forming an annular space therebetween, wherein the outer tube extends beyond the end of the inner tube. A burner nozzle having an outside diameter corresponding to the inside diameter of the outer tube is connected to the outlet end of the inner tube and forms a centralized opening in fluid communication with the inner tube and at least one peripheral longitudinally oriented opening in fluid communication with the annular space. In accordance with one embodiment, a longitudinally adjustable rod is disposed within the inner tube for adjustment of fluid flow therethrough, and a cylindrical insert having at least one flame stabilizer for stabilizing a flame produced by the burner is attached to the outlet end of the outer tube. In accordance with another embodiment, fluid flow through the inner tube is achieved by a flow control valve operably connected to the inner tube.
Owner:GAS TECH INST
Process and apparatus for uniform combustion within a molten material
A submerged combustion burner having co-axial fuel and oxidant tubes forming an annular space therebetween, wherein the outer tube extends beyond the end of the inner tube. A burner nozzle having an outside diameter corresponding to the inside diameter of the outer tube is connected to the outlet end of the inner tube and forms a centralized opening in fluid communication with the inner tube and at least one peripheral longitudinally oriented opening in fluid communication with the annular space. In accordance with one embodiment, a longitudinally adjustable rod is disposed within the inner tube for adjustment of fluid flow therethrough, and a cylindrical insert having at least one flame stabilizer for stabilizing a flame produced by the burner is attached to the outlet end of the outer tube. In accordance with another embodiment, fluid flow through the inner tube is achieved by a flow control valve operably connected to the inner tube.
Owner:GAS TECH INST
Method for producing chemically bonded phosphate ceramics and for stabilizing contaminants encapsulated therein utilizing reducing agents
Known phosphate ceramic formulations are improved and the ability to produce iron-based phosphate ceramic systems is enabled by the addition of an oxidizing or reducing step during the acid-base reactions that form the phosphate ceramic products. The additives allow control of the rate of the acid-base reactions and concomitant heat generation. In an alternate embodiment, waste containing metal anions are stabilized in phosphate ceramic products by the addition of a reducing agent to the phosphate ceramic mixture. The reduced metal ions are more stable and / or reactive with the phosphate ions, resulting in the formation of insoluble metal species within the phosphate ceramic matrix, such that the resulting chemically bonded phosphate ceramic product has greater leach resistance.
Owner:THE UNITED STATES AS REPRESENTED BY THE DEPARTMENT OF ENERGY
Refractory block for use in a burner assembly
InactiveUS6068468ACombustion using gaseous and pulverulent fuelCombustion using liquid and pulverulent fuelCombustorCombustion chamber
A burner assembly having improved flame length and shape control is presented, which includes in exemplary embodiments at least one fuel fluid inlet and at least one oxidant fluid inlet, means for transporting the fuel fluid from the fuel inlet to a plurality of fuel outlets-, the fuel fluid leaving the fuel outlets in fuel streams that are injected into a combustion chamber, means for transporting the oxidant fluid from the oxidant inlets to at least one oxidant outlet, the oxidant fluid leaving the oxidant outlets in oxidant fluid streams that are injected into the combustion chamber, with the fuel and oxidant outlets being physically separated, and geometrically arranged in order to impart to the fuel fluid streams and the oxidant fluid streams angles and velocities that allow combustion of the fuel fluid with the oxidant in a stable, wide, and luminous flame. Alternatively, injectors may be used alone or with the refractory block to inject oxidant and fuel gases. The burner assembly affords improved control over flame size and shape and may be adjusted for use with a particular furnace as required.
Owner:AIR LIQUIDE AMERICA INC +1
Flexible 3D Freeform Techniques
ActiveUS20160151833A1Improve manufacturing speedBuild fine and complexConfectioneryGlass forming apparatusEngineeringInjection molding machine
This invention relates to processes and systems of rapid prototyping and production. Its features includes flexible material deposition along tangential directions of surfaces of a part to be made, thereby eliminating stair-shape surface due to uniform horizontal layer deposition, increasing width of material deposition to increase build up rate, applying the principles of traditional forming / joining processes, such as casting, fusion welding, plastic extrusion and injection molding in the fabrication process so that various industrial materials can be processed, applying comparatively low cost heating sources, such as induction heating and arc-heating. Additional features include varying width and size of material deposition in accordance with geometry to be formed and applying a differential molding means for improved shape formation and surface finishing.
Owner:NATIONAL TSING HUA UNIVERSITY
Sag control of isopipes used in making sheet glass by the fusion process
Isopipes for use in making sheet glass by a fusion process are provided which exhibit reduced sag. The isopipes are composed of a zircon refractory which has a mean creep rate (MCR) at 1180° C. and 250 psi and a 95 percent confidence band (CB) for said mean creep rate such that the CB to MCR ratio is less than 0.5, the MCR and the CB both being determined using a power law model. The zircon refractory can contain titania (TiO2) at a concentration greater than 0.2 wt. % and less than 0.4 wt. %. A concentration of titania in this range causes the zircon refractory to exhibit a lower mean creep rate than zircon refractories previously used to make isopipes. In addition, the variation in mean creep rate is also reduced which reduces the chances that the zircon refractory of a particular isopipe will have an abnormally high creep rate and thus exhibit unacceptable sag prematurely.
Owner:CORNING INC
Panel-cooled submerged combustion melter geometry and methods of making molten glass
ActiveUS20110308280A1Reduce dead flow （stagnant） regionSmall sizePulsating combustionTank furnacesCombustorDirect combustion
A melter apparatus includes a floor, a ceiling, and a substantially vertical wall connecting the floor and ceiling at a perimeter of the floor and ceiling, a melting zone being defined by the floor, ceiling and wall, the melting zone having a feed inlet and a molten glass outlet positioned at opposing ends of the melting zone. The melting zone includes an expanding zone beginning at the inlet and extending to an intermediate location relative to the opposing ends, and a narrowing zone extending from the intermediate location to the outlet. One or more burners, at least some of which are positioned to direct combustion products into the melting zone under a level of molten glass in the zone, are also provided.
Owner:MANVILLE JOHNS
LED package for backlight unit
ActiveUS20060023451A1Avoid deformationImprove image qualityLighting support devicesGlass furnace apparatusEngineeringDie bonding
Disclosed herein is an LED package for a backlight unit. The LED package includes a plurality of LEDs, a die bonding part, a wire bonding part and a body. The die bonding part, on which the plurality of LEDs is arranged, allows the first electrodes of the LEDs to be electrically connected to an external circuit. The wire bonding part is spaced apart from the die bonding part by a predetermined distance to be insulated from the die bonding part and allows the second electrodes of the LEDs to be electrically connected to the external circuit so that the LEDs are operated. The body has a molding cup which is used to fill a space above the LEDs with transparent resin and a base on which the die bonding part and the wire bonding part are arranged.
Owner:SAMSUNG ELECTRONICS CO LTD
Methods of forming high-density arrays of holes in glass
ActiveUS20130247615A1High positioning accuracyReliable and low-costGlass furnace apparatusSemiconductor/solid-state device detailsUv laserEtching
A method of fabricating a high-density array of holes in glass is provided, comprising providing a glass piece having a front surface, then irradiating the front surface of the glass piece with a UV laser beam focused to a focal point within + / −100 μm of the front surface of the glass piece most desirably within + / −50 μm of the front surface. The lens focusing the laser has a numerical aperture desirably in the range of from 0.1 to 0.4, more desirably in the range of from 0.1 to 0.15 for glass thickness between 0.3 mm and 0.63 mm, even more desirably in the range of from 0.12 to 0.13, so as to produce open holes extending into the glass piece 100 from the front surface 102 of the glass piece, the holes having an diameter the in range of from 5 to 15 μm, and an aspect ratio of at least 20:1. For thinner glass, in the range of from 0.1-0.3 mm, the numerical aperture is desirably from 0.25 to 0.4, more desirably from 0.25 to 0.3, and the beam is preferably focused to within + / −30 μm of the front surface of the glass. The laser is desirable operated at a repetition rate of about 15 kHz or below. An array of holes thus produced may then be enlarged by etching. The front surface may be polished prior to etching, if desired.
Owner:CORNING INC
Self-cooled oxygen-fuel burner for use in high-temperature and high-particulate furnaces
InactiveUS6210151B1Avoiding particulate inspiration.TheControl expansionIndirect carbon-dioxide mitigationGaseous fuel burnerParticulatesVolatiles
A self-cooled oxidant-fuel burner consisting novel fuel and oxidant nozzles and three compartment refractory burner block design is proposed. The new oxidant-fuel burner can fire in high-temperature (2200° F. to 3000° F.) and high-particulate (or high process volatiles / condensates) furnaces without over-heating or causing chemical corrosion damage to it's metallic burner nozzle and refractory burner block interior. Using various embodiments of nozzle and block shape, the burner can offer a traditional cylindrical flame or flat flame depending on the heating load requirements. The new features of this burner include unique fuel nozzle design for the streamline mixing of fuel and oxidant streams, a controlled swirl input to the oxidant flow for desired flame characteristics, a controlled expansion of flame envelope in the radial and axial dimensions, and efficient sweeping of burner block interior surface using oxidant to provide convective cooling and prevent any build up of process particulates. In addition, a relatively thick wall metallic nozzle construction with heat conduction fins enable efficient heat dissipation from the nozzle tip and providing a maintenance free burner operation.
Owner:AIR LIQUIDE AMERICA INC +1
Overflow downdraw glass forming method and apparatus
ActiveUS20060016219A1Process can be modifiedMinimizing thickness variationGlass furnace apparatusVolume/mass flow measurementThermal creepEngineering
The present invention significantly modifies “The Overflow Process”. It includes a method and apparatus for measuring glass flow rate and maintaining a constant glass flow rate. It also embodies design features and methods that support and stress the forming apparatus in a manner such that the deformation that results from thermal creep is corrected, thus minimizing the effect of the thermal creep on the thickness variation of the glass sheet. The present invention also embodies design features that change the process from a single step (combined flow distribution and cooling) to a two step process; step one being flow distribution and step two being cooling.
Owner:CORNING INC
Oxidizing oxygen-fuel burner firing for reducing NOx emissions from high temperature furnaces
InactiveUS6171100B1Combustion using gaseous and pulverulent fuelCombustion using liquid and pulverulent fuelFurnace temperatureEquivalence ratio
Burner firing method and device are presented where an oxidizing oxygen-fuel burner is fired at an angle to the reducing air-fuel burner flame to reduce overall NOx emissions from high temperature furnaces. The oxidizing oxy-fuel burner stoichiometric equivalence ratio (oxygen / fuel) is maintained in the range of about 1.5 to about 12.5. The reducing air-fuel burner is fired at an equivalence ratio of 0.6 to 1.00 to reduce the availability of oxygen in the flame and reducing NOx emissions. The oxidizing flame from the oxy-fuel burner is oriented such that the oxidizing flame gas stream intersects the reducing air-fuel flame gas stream at or near the tail section of the air-fuel flame. The inventive methods improve furnace temperature control and thermal efficiency by eliminating some nitrogen and provide an effective burnout of CO and other hydrocarbons using the higher mixing ability of the oxidizing flame combustion products. The simultaneous air-fuel and oxy-fuel burner firing can reduce NOx emissions anywhere from 30% to 70% depending on the air-fuel burner stoichiometric ratio.
Owner:AIR LIQUIDE AMERICA INC +1
Methods and apparatus for recycling glass products using submerged combustion
ActiveUS20120077135A1Reduce eliminate needCharging furnaceGlass furnace apparatusCombustionEngineering
A method for recycling glass mat waste, wound rovings, and other products includes providing a source of glass mat, or a plurality of rovings, for example on a roll, and routing the glass mat or rovings into a submerged combustion melter. An unwind system and a pair of powered nip rolls, powered conveyors, or other arrangement may work in combination to provide a substantially consistent rate of material into the melter. The melter may operate under less than atmospheric pressure to avoid fumes escaping the melter. A slot in the melter allows ingress of the glass mat or rovings into the melter, and a glass mat former such as a folder may be used to ensure that the mat fits through the slot. Alternatively, the glass mat may be cut by a slitter prior to entering the slot.
Owner:JOHNS MANVILLE CORP
Burner apparatus, submerged combustion melters including the burner, and methods of use
Owner:JOHNS MANVILLE CORP
Method and apparatus for drawing a low liquidus viscosity glass
InactiveUS20070130994A1Easy to understandGlass furnace apparatusGlass drawing apparatusViscosityGlass sheet
A method of a drawing a glass ribbon from molten glass sheet via a downdraw process by creating a temperature drop across a thickness of the molten glass flowing over forming surfaces of a forming wedge. The forming wedge includes an electrically conductive material for heating the glass above the root.
Owner:CORNING INC
Oxygen-fired front end for glass forming operation
A front end for a glass forming operation comprises an open channel and at least one burner. The channel has at least one surface. The surface has at least one hole therein. The burner is oriented in the hole at an acute angle relative to the surface. In another embodiment of the invention, the channel has a top and a pair of sidewalls each having a surface. At least one hole is in at least one of the surfaces. The hole is at an acute angle relative to at least one surface. The burner is an oxygen-fired burner. In yet another embodiment of the invention, the top and sidewalls each have a super structure surface constructed of refractory material. The channel has an upstream end and a downstream end. At least one of the surfaces has a plurality of holes therein. The burners extend at an acute angle relative to at least one surface and in a plane extending between the upstream end and the downstream end and perpendicular to at least one surface. Oxygen-fired burners extend axially through corresponding holes.
Owner:OCV INTELLECTUAL CAPITAL LLC
Method of retrofitting a furnace to provide oxygen enrichment
An oxygen enrichment system is provided which uses the existing air / fuel burners of a regenerative furnace to distribute additional oxygen to the burners for increased efficiency, and reduced nitrous oxide emissions. The centrally positioned cooling air lances in the burners of a regenerative furnace are modified to deliver oxygen when the burners are firing for oxygen enrichment. During the burmer firing cycle, oxygen is delivered from an oxygen supply through the oxygen lance to provide a central oxygen jet. The fuel is delivered concentrically around the oxygen jet. During the non-firing cycle of the burner, cooling air or other cooling fluid is delivered from the cooling air supply through the oxygen jet for cooling the offside of the furnace.
Owner:AIR LIQUIDE AMERICA INC
Self-cooled oxygen-fuel for use in high-temperature and high-particulate furnaces
InactiveUS6276924B1Avoiding particulate inspiration.TheControl expansionGlass furnace apparatusGlass melting apparatusParticulatesCombustor
Owner:AIR LIQUIDE AMERICA INC +1
Method of forming a glass melt
ActiveUS7454925B2Promote vigorous boilingReduce partial pressureCharging furnaceGlass furnace apparatusMolten glassExcessive Cooling
A method of forming a glass melt including heating a glass feed material in a first melting furnace to form a glass melt, flowing the glass melt into a second melting furnace through a refractory metal connecting tube, and further heating the glass melt in the second melting furnace. The refractory metal connecting tube is heated to prevent the molten glass from excessive cooling, and to ensure that the glass melt entering the second melting furnace is equal to or greater than the temperature of the glass melt in the second melting furnace. An apparatus for performing the method is also disclosed.
Owner:CORNING INC
Solar cell using low iron high transmission glass with antimony and corresponding method
A high transmission and low iron glass is provided for use in a solar cell. The glass substrate may be patterned on at least one surface thereof. Antimony (Sb) is used in the glass to improve stability of the solar performance of the glass upon exposure to ultraviolet (UV) radiation and / or sunlight. The combination of low iron content, antimony, and / or the patterning of the glass substrate results in a substrate with high visible transmission and excellent light refracting characteristics.
Owner:GUARDIAN GLASS LLC
Molten glass delivery and refining system
Methods and apparatus for refining and delivering a supply of molten glass include melting a supply of glass in a melter and discharging a stream of molten glass. A refining section is provided to refine the molten glass discharged by the melter and to deliver the molten glass downstream to a glass forming apparatus. The refining section is mounted for movement into and out of contact with the stream of molten glass to connect and disconnect the glass forming apparatus with the stream of molten glass.
Owner:OWENS CORNING INTELLECTUAL CAPITAL LLC
Submerged combustion melter comprising a melt exit structure designed to minimize impact of mechanical energy, and methods of making molten glass
A melter apparatus includes a floor, a ceiling, and a wall connecting the floor and ceiling at a perimeter of the floor and ceiling, a melting zone being defined by the floor, ceiling and wall, the melting zone having a feed inlet and a molten glass outlet positioned at opposing ends of the melting zone. Melter apparatus include an exit end having a melter exit structure for discharging turbulent molten glass formed by one or more submerged combustion burners, the melter exit structure fluidly and mechanically connecting the melter vessel to a molten glass conditioning channel. The melter exit structure includes a fluid-cooled transition channel configured to form a frozen glass layer or highly viscous glass layer, or combination thereof, on inner surfaces of the fluid-cooled transition channel and thus protect the melter exit structure from mechanical energy imparted from the melter vessel to the melter exit structure.
Owner:JOHNS MANVILLE CORP
Separation of transparent workpieces
ActiveUS20160031745A1Promote resultsGreat tendencyGlass furnace apparatusFine working devicesAtomic physicsLaser
A method is provided for preparing transparent workpieces for separation. The method includes generating aligned filament formations extending transversely through the workpiece along an intended breaking line using ultra-short laser pulses.
Owner:SCHOTT AG
Vacuum insulating glass unit with large pump-out port, and/or method of making the same
ActiveUS20090155500A1Increase the diameterSimple technologyGlass furnace apparatusClimate change adaptationEngineeringGetter
Certain example embodiments of this invention relate to vacuum insulating glass (VIG) units, and / or methods of making the same. More particularly, certain example embodiments relate to VIG units having large pump-out ports, and / or methods of making the same. In certain example embodiments, a vacuum insulating glass (VIG) unit is provided. First and second spaced-apart glass substrates are provided, and a gap is provided between the spaced-apart substrates. A pump-out port has a size (e.g., diameter) of at least about 30 mm. A cover seals the pump-out port. A getter is in communication with the gap. The pump-out port is sealed using the cover, in making the vacuum insulating glass unit, via a sealing material provided proximate to the cover and / or proximate to the pump-out port.
Owner:GUARDIAN GLASS LLC
High Speed Laser Processing of Transparent Materials
ActiveUS20150299018A1Avoid focusHigh precision laserBlowing machine gearingsGlass furnace apparatusLaser processingAtomic physics
A method and system for laser pre-cutting a layered material (31) with a laser beam (14) is disclosed. The layered material (31) comprises at least one tensile stress layer (TSL), at least one compression stress layer (CSL1, CSL2), and at least one interface region (IR1, IR2) between the at least one tensile stress layer (TSL) and the at least one compression stress layer (CSL1, CSL2) and is transparent to allow propagation of the laser beam (14) through the layered material (31). The method may comprise setting an optical beam path (8) and a laser characteristic of the laser beam (14) such that an interaction of the laser beam (14) with the layered material (31) generates an elongate damage region (57) in the layered material (31), and, for each of a series of pre-cut positions (XN−1, XN, XN+1) of the layered material (31), pre-cutting the layered material (31) by positioning the layered material (31) and the laser beam (14) with respect to each other and irradiating the laser beam (14) such that the respective elongate damage regions (57) extend across the at least one interface region (IR1, IR2).
Owner:UAB ALTECHNA R&D
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