Abstract: A system for directing cooling air onto a neck ring in a glassware molding machine that includes at least one air plenum stationarily disposed at a blank mold station and having an internal cavity for receiving cooling air flowing laterally inwardly toward the axis and at least one outlet opening adjacent to the axis, a plunger wear plate disposed overlying at least a portion of the air plenum, and having an array of axially oriented openings for receiving air directed from the air plenum, a plurality of openings in the neck ring arm for receiving air from the openings in the plunger wear plate across a gap between the neck ring arm and the plunger wear plate when the neck ring arm overlies the plunger wear plate, and a plurality of air passages in the neck ring for receiving air from the neck ring arm openings.

Abstract: Method for transferring heat onto a glass in the furnace meant for heat treatment of glass, into which glass is transferred on a path of rollers, furnace heated by resistors (5) located inside of the furnace, the radiation heat directed onto the glass and convection heat transferred by means of a blower and air onto the glass. In the method the glass being heated and roller space (8) are separated by a wall (9) from air circulation space (3, 7), by means of blowers the air circulation is arranged to heat above and/or below the glass by means of the first chamber (7) and second chamber (3), wherein air is sucked by the blower from the first chamber and blowed into the second chamber, wherein air circulation is conducted from the vicinity of the glass and from roller space (8) through an opening in the wall (9) into vertical channels (7C2) and further into the first chamber and chamber the glass is directed onto the glass through nozzles (6).

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.

Abstract: A method and system feed and burn pulverized fuel, such as petroleum coke, in a glass melting furnace having burners associated with sealed regenerative chambers which act as heat exchangers. The system supplies the pulverized fuel for melting glass raw materials. The emissions of flue gases produced by the combustion process of the fuel in the furnace are controlled in order to maintain clean the flue gases and for reducing the emission of impurities from the fuel such as SOx, NOx, and particulates. The regenerative chambers are manufactured with selected refractories such as magnesium, zircon-silica-alumina, or magnesia and zirconium-silicate, for counteracting the erosive and corrosive effects produced by the combustion process of the fuel in the glass melting chamber. A burner feeds the petroleum coke and simultaneously mixes a primary air and pulverized fuel-air mixture for the burning of the pulverized fuel.

Abstract: A mold cooling system is disclosed for the blank mold halves of an I.S. machine. The mold halves are supported at their bottom by a lower hanger assembly which includes a discrete plenum for each of the mold halves. Each plenum is isolated and has its own air supply which includes an adjustable flow control. This provides complete control of the mold cooling process.

Abstract: 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.

Abstract: 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 pressure. This method includes suppressing oxygen bubble formation in the glass melt at a contacting surface between the metal surface and the glass melt; immersing an electrode in a second region of the glass melt not including the first region, which has a lower oxygen partial pressure than in the first region, and electrically conductively connecting the electrode and the at least one metal part. An apparatus for performing the method is also described as well as glasses made by the method.

Abstract: A structural component for a device for the treatment of melts, especially of glass melts, having a base body of metal or of a metal alloy and a cooling system in which a cooling medium is led through the structural component for the leading-off of heat. The base body is provided with a coating of a material the decomposition temperature of which lies below the temperature of the melt, and the cooling system is designed and arranged in such manner that the temperature of the boundary layer of the melt that immediately surrounds the structural component lies below the decomposition temperature of the coating material.

Abstract: A device for heating plates of glass (3) which are hardened or deformed, includes two ceramic heating plates (1) between which a plate of glass (3) is arranged. Compensation plates (20) are associated with the heating plates (1) at a distance therefrom, in addition to heaters (6) which are arranged close thereto. The heaters (6) are accommodated in housings (11) which are defined on one side of the heating plates (1). Holes (8) are provided in the heating plates (1). Gas is fed through the holes into the housing between the heating plates (1) and the compensating plates (2). The gas is heated by flowing past the compensating plates (20) and forms gas cushions (7) on both sides of the plate of glass (3) which hold the plate. The plate of glass (3) is heated in a homogenous manner by radiation and convection.

Abstract: 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).

Abstract: A semi-convective forced air system for heating glass sheets during a heating cycle comprises a heating chamber having a length and a width, at least one heating element located within the heating chamber, a conveyor having a length and a width, the conveyor extending lengthwise through the heating chamber, a compressed air source, a plurality of air manifolds positioned within the heating chamber and in fluid connection with the compressed air source, each of the air manifolds having a length, and each of the air manifolds being oriented parallel to the length of the conveyor, and a plurality of nozzles mounted on each air manifold and in fluid connection with the air manifold for mixing together and directing toward the conveyor a combination of compressed air and over air to convectively heat a sheet of glass on the conveyor, the plurality of nozzles on each air manifold being spaced along the length of the air manifold.

Abstract: The invention relates to a skull pot (1) for melting, crystallizing or refining inorganic substances. Said pot comprises a pot wall (1.1), a pot bottom (1.2), an induction coil (2) which surrounds the pot wall (1.1) and by means of which high-frequency energy can be coupled into the content of the pot. The pot wall (1.1) is formed by a ring of metal pipes which can be connected to a cooling medium. Slits are embodied between adjacent metal pipes. The bottom (1.2) is provided with a discharge for the melt (3). A sleeve (4) is allocated to the discharge. The admission end (4.1) of the sleeve (4) protrudes far into the inner chamber of the skull pot (1) in such a way that, during use, the melt (3) can be withdrawn through the crystallized bottom layer (3.3) in a controlled manner without the danger of impairing quality.

Abstract: This invention relates to a device for melting or refining glass or glass ceramics. According to the invention, such a device is provided with the following characteristics: a channel which is arranged in an essentially horizontal manner and which is provided with an inlet and an outlet for the glass melt; and an HF coil for coupling HF energy into the melt is allocated to the channel. The channel is made of a plurality of metal pipes in a similar way to a skull pot. Said pipes can be connected to a cooling medium.

Abstract: A dehydration and consolidation furnace and a dehydration and consolidation method in which gas in a chamber does not leak to a furnace body room and gas in a furnace body room does not leak into a chamber is provided. A furnace of one embodiment of this invention has first muffle tube 3 and second muffle tube 4. The second muffle tube 4 is arranged coaxially around the first muffle tube 3. An optical fiber preform is arranged in this furnace. During the dehydration and consolidation process the pressure of the intermediate room 10 is set lower than a pressure inside the first muffle tube and outside the second muffle tube, and a gas supply and exhaust of the intermediate room 10 are performed independent of the gas supply and exhaust of the first muffle tube and a furnace body room.

Abstract: An object of the present invention is to provide a press forming machine for glass optical devices which is superior in the temperature uniformity and has a low manufacturing cost. An upper die is fixed to a lower end of a fixed shaft, and a lower die is fixed to an upper end of a moving shaft. The upper die and the lower die are accommodated in a quartz tube, and a forming chamber in which atmosphere adjustment is possible is formed inside the quartz tube. An infrared lamp unit is arranged so as to surround the quartz tube. The infrared lamp unit is constituted by a plurality of straight tube type infrared lamps each of which has a vertical axis, and a reflecting mirror is arranged behind each infrared lamp. In this example, straight tube type infrared lamps are used in the infrared lamp unit.

Abstract: A method for manufacturing a glass optical element having at least one concave surface, including: softening a glass molding material by heating, molding the softened material with a first mold having a first molding surface and a second mold having a second molding surface by applying a pressure, the first molding surface including a first concave forming surface, the second molding surface including a convex forming surface, a planar forming surface or a second concave forming surface, the second concave forming surface having a curvature radius greater than that of the first concave forming surface, whereby the applying of the pressure starts when the first mold and the second mold are at temperatures above a glass transition temperature of said glass molding material, the glass material is cooled so that a temperature of the glass material reaches a temperature equal to or lower than a glass transition temperature (Tg) of the glass material, and the cooled glass material is removed from either of the firs

Abstract: A bottom mold for molding a glass panel for a cathode ray tube includes a hollow portion defined by a rectangular bottom wall 2 and a side wall 3 provided on four sides of the bottom wall. A refrigerant is supplied to a central portion of the bottom wall 2 from under the bottom wall to cool a glass panel for a cathode ray tube 5 to be filled in the hollow portion. The bottom wall 2 has a hollow layer 4 provided at the central portion to enhance cooling of a peripheral portion of the bottom mold by preventing the central portion from being excessively cooled.

Abstract: The invention relates to a skull pot for melting or refining glass or glass ceramics, comprising a pot wall (1), a pot base, and an induction coil (3) which surrounds said pot wall and through which high-frequency energy can be coupled into the contents of the pot. The pot wall is made up of a ring of metal pipes (1.1) which can be connected to a cooling medium, slot-type intermediate chambers being provided between adjacent metal pipes. The pot base has a run-off for the melt. The metal pipes (1.1) that form the pot wall (1) arm short-circuited with each other above the base in order to increase the degree of efficiency of the skull pot and especially, in order to even out the temperature profile of the melt throughout the depth of the melt.

Abstract: A machine for moulding hollow glass items comprises a basement (2′) supporting a plurality of modules (4′) placed side by side, having first and second devices (13, 14) supplying cooling air for parison and blow moulds. A first (VI, 16-22) and a second (V2, 26-31) air supply arrangement supply independently the first and second supply devices (13, 14). Both supply air flows (F1, 15, F2, 25, 25′) get independently through each module (4′) through the basement (2′) and within the module.

Abstract: A mold cooling system is disclosed for the blank mold halves of an I.S. machine. The mold halves are supported at their bottom by a lower hanger assembly which includes a discrete plenum for each of the mold halves. Each plenum is isolated and has its own air supply which includes an adjustable flow control. This provides complete control of the mold cooling process.

Abstract: A heat source is formed within one piece of a multi-piece mold designed to shape a glass tube. The one piece of the mold can then be used as a source of intense heat to render the glass malleable and to also contribute to shaping the tube in conformance with the mold. In one embodiment, the heat source includes channels formed throughout the one piece of mold for distributing a gas therethrough with jets of gas emanating from the inner surface of the mold piece for heating the tube to be shaped to a desired temperature. In apparatus embodying the invention, there is no need for a separate torch and for moving the torch during the shaping process. Also, in accordance with the invention, better control of the heat supplied to the tube being shaped is obtained.

Abstract: An inclined trough assembly (10) or gob scoop (20, 40) for conveying, by gravity, formable gobs of glass at an elevated temperature to a section of a glass container forming machine of the I.S. type. The trough assembly has a trough member (12) configured, in cross-section, generally corresponding to that of an upwardly facing V and a manifold (14) at least partly underlying the trough member and having a configuration, in cross-section, generally corresponding to that of an upwardly facing U. The trough member is inserted into the manifold partly to the bottom thereof, and the manifold has a compressed air inlet (14a) for receiving compressed or fan air to flow along the manifold in cooling contact with the trough member.

Abstract: Methods for press molding a glass body, especially for optical applications, without additional grinding and polishing steps are described. One method is performed with a press mold having an upper mold part, a lower mold part and, if necessary or desired, a ring. In order to improve the quality of the products, especially glass bodies of larger diameters, a voltage is applied across the upper mold part and the lower mold part when the glass body is within the press mold and a pressing force is applied to the glass body when the temperature of the glass body matches the temperature of the press mold. Alternatively, in another method the press mold is cooled after it reaches a predetermined temperature and the pressing force is applied to the glass body in the mold after exceeding the sticking temperature (T0).

Abstract: A device for the melting or purifying of inorganic substances, in particular of glass, which comprises a number of metal tubes which may be attached to a cooling medium and which are arranged next to each other, in such a way that together they form a container, a high frequency coil for the injection of energy into the container contents and a plastic coating for the metal tubes, the decomposition temperature of which lies below the temperature of the melt. The cooling system is configured and arranged such that the temperature of the boundary layer of the melt, immediately surrounding the component, lies below that of the decomposition temperature of the coating material.

Abstract: The invention relates to a device for melting or refining glass or glass ceramics. According to the invention, a device of this type is provided with the following characteristics: a plurality of tubes which are U-shaped and arrange side by side so that they form a cage like skull channel that is open on top, and a high frequency oscillation circuit which comprises an induction coil. The tubes can be connected to a cooling medium. The induction coil wraps around the channel in such a manner that winding sections extend along the lateral walls of the channel.

Abstract: A method and system for feeding and burning pulverized fuel, such as petroleum coke, in a glass melting furnace, which includes a glass melting and a plurality of burners associated with a pair of sealed regenerative chambers disposed side-by-side which act as heat exchangers, the burners are arranged in a series of ports that are associated with the glass melting region of the furnace. The system includes means for supplying the pulverized fuel by each one of the burners for melting glass raw materials. The emissions of flue gases produced by the combustion process of the fuel in the furnace are controlled in order to maintain clean the flue gases and for reducing the emission of impurities from the fuel such as SOx, NOx and particulates.

Abstract: The invention relates to a method for producing thin glass panes, especially glass panes with a thickness of below 1 mm, by drawing a thin glass strand vertically downwards. According to the inventive method, a glass melt is fed from a melting bath via a feed to the glass drawing tank that comprises a nozzle system with at least one slotted nozzle. The length and the diameter of the feed as well as the viscosity of the glass melt present in the feed determine the overall throughput. The throughput per length unit in the transverse direction to the glass strand (so-called line throughput) is adjusted via the geometry of the nozzle system and via the viscosity of the glass melt present in the nozzle system. These parameters are adjusted in such a manner that the glass, when leaving the nozzle system, does not wet the bottom of the slotted nozzle in the range of the tearoff edge.

Abstract: In an industrial glass furnace which contains recuperators, regenerators, electric boost or other devices for providing heat to glass batch material an oxy-fuel burner mounted in the roof of the furnace provides additional heat to melt the batch material. A method of mounting and using such a roof-mounted oxy-fuel burner including the operating parameters to maximize heat transfer while minimizing the disturbance of the batch material is disclosed.

Abstract: In an industrial glass furnace, which optionally contains recuperators, regenerators, electric boost or other devices for providing heat to glass batch material, at least one staged combustion oxy-fuel burner is mounted in the roof of the furnace to provide heat to melt the glass batch material by providing a flow of fuel to the oxy-fuel burner; providing a flow of gaseous oxidant in association with said the oxy-fuel burner; injecting the fuel and the oxidant into the furnace; and, combusting the fuel such that at least a portion of combustion is effected in the vicinity of said glass forming material to enhance convective and radiative transfer of heat to said glass forming material without substantially disturbing the glass forming material. In one embodiment, the oxy-fuel burner is adapted for injecting liquid fuels.

Abstract: The temperature of cooling air to a manifold for distribution to molds of a glass manufacturing machine is controlled by passing untreated air through an indirect heat exchanger in indirect heat exchange relationship with water flowing through a coil in the indirect heat exchanger before treated air from the indirect heat exchanger is passed through a blower for distribution to the manifold. Water for treating the air flowing through the indirect heat exchanger is pumped through the coil from a water cooling tower that is used in a glass manufacturing plant, either at a first temperature from a first outlet of the water cooling tower or at a second temperature from a second outlet of a water cooling tower, or a mixture of water from the first outlet and the second outlet. In a first embodiment, water from the first outlet and water from the second outlet pass through a temperature controlled three-way mixing valve before delivery to a pump for delivery to the indirect heat exchanger.

Abstract: While avoiding the disadvantages of the screen printing technique employed until now, the invention provides a shaping tool (1) with a structured surface for creating structures on glass (2) which, in an economical way, makes it possible to form high-precision microstructures by local heating of the region of glass to be structured. The shaping tool (1) has a rolling cylinder (3) including a metal hollow cylinder (7) and a shaping sheet (8) secured in a surface contact to it, as well as a continuous shaft (5) for continuously driving the rolling cylinder (3) via drivers (4) coupled to the hollow cylinder (7). Between the shaft (5) and the hollow cylinder (7), an electric heater (6) for targeted local heating of the glass during structuring is disposed in an electrically insulated fashion. The electric heater (6) is advantageously thermally insulated from the shaft (5) with a ceramic cylinder (14).

Abstract: In order to provide a quartz glass crucible distinguished by high purity, high opacity and/or low transmissibility in the IR spectrum, it is proposed on the basis of a known quartz glass crucible of opaque quartz glass with a crucible body symmetrical in relation to a rotational axis, an outer zone (3) of opaque quartz glass transitioning radially toward the inside into an inner zone (2) of transparent quartz glass and with a density of at least 2.15 g/cm3, that according to the invention, the crucible body (1) be made of a synthetic SiO2 granulate with a specific BET surface ranging from 0.5 m2/g to 40 m2/g, a tamped volume of at least 0.8 g/cm3 and produced from at least partially porous agglomerates of SiO2 primary particles.

Abstract: A system for cooling molds in a glassware forming machine includes a pair of mold arms mounted on a hinge post for movement toward and away from each other, and at least one mold part carried by each mold arm and adapted to cooperate with each other to form a glassware blank mold or blow mold. Each mold part includes at least one coolant passage having an inlet and an outlet disposed at one end of the mold part, and each mold arm has inlet and outlet coolant flow passages operatively coupled to the inlet and outlet of the mold part mounted on that arm. A liquid coolant source and a liquid coolant return are disposed adjacent to the hinge post. A first coolant passage extends through the hinge post between the coolant source and the inlet flow passages in the mold arms, and a second coolant passage extends through the hinge post between the outlet coolant flow passages in the mold arms and the coolant return.

Abstract: An apparatus for forming a product by a pressing process, has

Abstract: Apparatus (26) and a method for forming heated glass sheets in a heated chamber (22) of a housing (20) includes an upper mold support assembly (28) for supporting an upper mold (38) within the heated chamber for cyclical vertical movement between upper and lower positions. A lower mold shuttle (50) supports a lower mold (36) for movement between an idle position horizontally spaced from the upper mold and a use position below the lower mold. The apparatus also includes a lower mold support assembly (60) to which the lower mold is transferred from the lower mold shuttle (50) to provide support thereof while permitting horizontal alignment with the upper mold upon each cycle of downward movement to form a heated glass sheet between the molds. The lower mold shuttle (50) is supported by vertically movable rollers (70) to provide the transfer between the lower mold shuttle and the lower mold support assembly (60).

Abstract: To increase the strength of the glass panel of a CRT, the temperature of the glass panel is reduced during reforming from a temperature above, preferably at least 30° C. above the annealing point, to a temperature well below, preferably at least 80° C. below the strain point. This induces high surface compression in the glass panel, paired with a low rate of compaction. The glass panel is subsequently not subjected to the usual annealing step.

Abstract: A process and furnace for melting glass is set forth wherein the majority of the combustion energy over the melting zone of the furnace is provided by oxy-fuel combustion while a majority of the combustion energy over the fining zone of the furnace is provided by air-fuel combustion. In many cases, it will be preferable to provide greater than 70% and up to and including 100% of the combustion energy over the melting zone by oxy-fuel combustion and greater than 70% and up to and including 100% of the combustion energy over the fining zone by air-fuel combustion. By proper tailoring of the combustion space atmosphere through oxy-fuel and air-fuel firing, the present invention can result in an improvement in glass productivity and quality. The present invention can be applied in the construction of a new furnace or can be applied to existing air-fuel furnaces.

Abstract: The temperature of cooling air to a manifold for distribution to molds of a glass manufacturing machine is controlled by passing untreated air through an indirect heat exchanger in indirect heat exchange relationship with water flowing through a coil in the indirect heat exchanger before treated air from the indirect heat exchanger is passed through a blower for distribution to the manifold. Water for treating the air flowing through the indirect heat exchanger is pumped through the coil from a water cooling tower that is used in a glass manufacturing plant, either at a first temperature from a first outlet of the water cooling tower or at a second temperature from a second outlet of a water cooling tower, or a mixture of water from the first outlet and the second outlet. In a first embodiment, water from the first outlet and water from the second outlet pass through a temperature controlled three-way mixing valve before delivery to a pump for delivery to the indirect heat exchanger.

Abstract: The subject of the invention is a process for melting and refining vitrifiable materials, such that all or part of the thermal energy necessary for melting the said vitrifiable materials is supplied by the combustion of fossil fuel(s) with at least one oxidizer gas, the said fuel(s)/gas or the gaseous products resulting from the combustion being injected below the level of the mass of vitrifiable materials (7). The refining of the vitrifiable materials after melting comprises at least one step of subjecting them to subatmospheric pressure.

Abstract: A system for cooling molds in a glassware forming machine includes a pair of mold arms mounted on a hinge post for movement toward and away from each other, and at least one mold part carried by each mold arm and adapted to cooperate with each other to form a glassware blank mold or blow mold. Each mold part includes at least one coolant passage having an inlet and an outlet disposed at one end of the mold part, and each mold arm has inlet and outlet coolant flow passages operatively coupled to the inlet and outlet of the mold part mounted on that arm. A liquid coolant source and a liquid coolant return are disposed adjacent to the hinge post. A first coolant passage extends through the hinge post between the coolant source and the inlet flow passages in the mold arms, and a second coolant passage extends through the hinge post between the outlet coolant flow passages in the mold arms and the coolant return.

Abstract: In furnaces for producing high purity fused silica glass boules, the refractory in the area of the burner holes reaches such elevated temperatures that cause impurities to leach out and the dissociation of the refractory, causing contamination of the silica glass. In order to reduce the temperature of the burner hole refractory, a porous insert or liner is positioned within the burner hole and a suitable gas is supplied thereto. The gas diffuses through the porous liner and not only cools the liner and refractory, but also forms a boundary layer along an inside surface of the insert that prevents particle buildup. The cooling of the insert and surrounding burner hole refractory prevents contamination of the silica glass from the refractory.

Abstract: An inclined trough assembly (10) for conveying, by gravity, formable gobs of glass at an elevated temperature to a section of a glass container forming machine of the I.S. type, the trough assembly having a trough member (12) configured, in cross-section, generally corresponding to that of an upwardly facing V and a manifold (14) at least partly underlying the trough member and having a configuration, in cross-section, generally corresponding to that of an upwardly facing U. The trough member 12 is inserted into the manifold partly to the bottom thereof, and the manifold has a compressed air inlet (14a) for receiving compressed or fan air to flow along the manifold in cooling contact with the trough member to cool the trough member and thereby reduce the coefficient of friction between the gobs of glass flowing through the trough assembly and the trough member thereof.

Abstract: A furnace particularly for heat treatments of glass sheets, comprising a longitudinally-elongated chamber which contains roller conveyor elements for the glass sheets. The furnace comprises irradiation-heating elements combined with first and second elements for heating by forced air convection in which the air temperature is controlled by adjusting its circulation rate, the elements being located respectively above and below the conveyor elements and therefore above and below the sheets being treated.

Abstract: Apparatus for forming a cased glass stream having an inner core glass surrounded by an outer casing glass includes a first orifice for receiving core glass from a first source, and an orifice ring forming a second orifice vertically spaced beneath and aligned with the first orifice. A chamber surrounds the second orifice and communicates with the second orifice through a metering gap between the first and second orifices. Casing glass is delivered from a second source to the chamber, such that glass flows by gravity from the first and second sources through the orifices to form the cased glass stream. A heater ring of refractory material is disposed beneath the orifice ring, and includes at least one electrical heater embedded in the refractory material of the heater ring. The electrical heater is thus disposed external to the casing glass chamber for adding heat to casing glass flowing through the chamber to the metering gap.

Abstract: A system and method of cooling glassware molds by directing liquid coolant to the blank or blow mold halves of a glassware forming machine through an enclosed pivotal rotary union-type structure. A coolant manifold is carried by each pivotal mold arm, and communicates with coolant inlet and outlet ports at the lower end of each mold part. The manifold is connected by a floating shaft seal and a rotary union assembly and a crank arm to a coolant source and coolant return in the section box of the associated machine section. Each pivotal connection—i.e., between the section box and the crank arm, between the crank arm and the rotary union assembly, and between the rotary union assembly and the floating shaft seal—comprises a bi-directional rotary union for feeding liquid coolant to the manifold and mold parts, and returning coolant from the manifold and mold parts.

Abstract: In an industrial glass furnace which contains recuperators, regenerators, electric boost or other devices for providing heat to glass batch material an oxy-fuel burner mounted in the roof of the furnace provides additional heat to melt the batch material. A method of mounting and using such a roof-mounted oxy-fuel burner including the operating parameters to maximize heat transfer while minimizing the disturbance of the batch material is disclosed.

Abstract: A glassware forming mold that includes a body of heat conductive construction having a central portion with a forming surface for shaping molten glass and a peripheral portion spaced radially outwardly of the central portion. A plurality of coolant passages extend in a spaced array through the peripheral portion of the mold body, and liquid coolant is directed through such passages for extracting heat from the body by conduction from the forming surface. A plurality of openings extend axially into the body radially between at least some of the liquid coolant passages and the forming surface for retarding heat transfer from the forming surface to liquid coolant in the passages.

Abstract: In a known method of producing a quartz glass tube (22), a cylinder (21) of quartz glass which rotates about a rotational axis (27) is continuously fed to a heating zone (24), softened therein in portions starting from one end, and the softened portion (25) is drawn over a drill head (1) of a drill body arranged to be coaxial to the rotational axis and is thereby formed into the quartz glass tube (22). Starting therefrom, in order to indicate a method for forming a cylinder of quartz glass into a hollow cylinder of quartz glass having an inner bore that is as flawless as possible and straight and dimensionally stable, it is suggested according to the invention that a drill body should be used with a drill head (1) having a contact surface (2) of a convex curvature facing the cylinder (21), preferably a spherically shaped contact surface (2). The drill body according to the invention is characterized by a drill head (1) which has a contact surface (2) of a convex curvature (2).

Abstract: 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).

Abstract: Plunger mechanism for the pressing of gobs of molten glass in the blank mould of an I.S. machine for the production of hollow ware, characterized in that the driving and controlling of the up and down movements of the pressing plunger is effected by a linear electric motor, conveniently a tubular-type linear motor.