Class 65/86 - Drawing and simultaneously forming hollow stock from molten glass

Subclass of Class 65 - Glass manufacturing
Definition: Processes for a process of drawing molten glass into hollow
No. of patents: 37
Last issue date: 01/13/2009

Number	Title	Issue Date
7475567	Method and apparatus for continuously manufacturing calibrated round or profiled glass tubes In the method molten glass emerges from an outlet opening of a melt feed. The molten glass is drawn over a shaping body so as to form a hollow drawing bulb. According to the invention, the drawing bulb is drawn over a profile forming body positioned downstream of th...	01/13/2009
7363776	Method for forming fused quartz using deuterium A silica deposition tube is fused in a deuterium (D2) gas atmosphere and optionally baked in a deuterium (D2) gas atmosphere to substantially reduce the hydrogen content in the tube for decreased fiber attenuation. Alternatively, raw silica mat...	04/29/2008
7305852	Method for manufacturing quartz glass ingot The invention provides a method for manufacturing a large scale quartz glass slab ingot in a flame hydrolysis reaction in a furnace, including the steps of rotating the furnace, depositing a fused silica on a furnace bed, and extending the deposit outwardly by heati...	12/11/2007
7107791	Method for changing the boundary surface tension of a liquid glass piece and apparatus for performing said method The process according to the invention reduces the effort required to shape a glass piece. In this process a liquid glass piece is provided on a structured supporting surface of an electrically conducting base. A voltage is applied across the liquid glass piece by c...	09/19/2006
7093464	Device for supporting a horizontal guided glass strand The invention concerns a device for supporting a horizontal guided, continuous glass strand; with a number of supporting blocks, which each exhibits a supporting area, facing the glass strand; the individual suppor...	08/22/2006
7000431	Method of preventing schileren formation in a glass melt with same The sleeve-type glass melt agitator has a rotatable cylindrical sleeve provided with outwardly protruding vane elements and through-going openings in its outer cylindrical surface to stir the glass melt when the sleeve is rotated. The sleeve type agitator is arrange...	02/21/2006
6851280	Method of making a halogen lamp and other analogous lamps and objects, and apparatus for the manufacture thereof The present invention generally relates to a method of making halogen lamps and halogen lamp bulbs, as well as other analogous lamps and objects. The present invention also relates to apparatus used in a method of making halogen lamps and halogen lamp bulbs, as well...	02/08/2005
6799440	Optical fiber deposition tube fused in deuterium atmosphere for attenuation improvement A silica deposition tube is fused in a deuterium (D2) gas atmosphere and optionally baked in a deuterium (D2) gas atmosphere to substantially reduce the hydrogen content in the tube for decreased fiber attenuation. Alternatively, raw silica mat...	10/05/2004
6595029	Process for devices for the production of internally-hardened glass tubes as well as their use The invention relates to a process for the production of internally-hardened glass tubes, in which in a tube-drawing process for the production of glass tubes that is known in the art, a coated drawing tool, for example in the process according to Danner ...	07/22/2003
6301932	Method for forming an internally channeled glass article The present invention is directed to a method for forming glass articles containing enclosed channels. The method comprises the following steps: a) delivering and depositing a first length of a molten glass ribbon (18) to a surface of a mold (20) having a...	10/16/2001
6217803	Forming method and forming system A partition member having partition walls arranged in a lattice is disposed in the vicinity of an upper surface of a molten metal mass. The upper surface is divided by the partition walls into a multiplicity of segmental surfaces. A forming starter member...	04/17/2001
6207049	Multichannel capillary column A multichannel capillary column having an interior wall defining a single internal bore, wherein the interior wall defines a plurality of n channels and n ridges, wherein adjacent channels are partially separated by a respectively interposed ridge, and wh...	03/27/2001
5743928	Method and apparatus for extruding glass tubing An apparatus (10) for extruding glass tubing (12) which comprises a furnace (14). A component (16) within the furnace (14) is for holding molten glass (18). A duplex mandrel (20) on one end of the furnace (14) is connected into the holding component (16)....	04/28/1998
5688300	Conveying glass tubing A runway for conveying glass tubing, as the tubing is drawn from a source of molten glass, embodies support assemblies having rotating sleeves mounted on guide shafts to contact the tubing. A circulating humid atmosphere is maintained in an enclosure duri...	11/18/1997
5464462	Method of making a quartz glass tube having a reduced ultraviolet radiation transmissivity Ultraviolet (UV) radiation in the UV-C and UV-B bands, which is particularly dangerous, is absorbed and filtered by quartz glass doped with between 0.065% and 3.25%, and preferably between 0.065% and 1.3%, by weight, of cerium metal, or cerium as such. Pr...	11/07/1995
5364432	Method for producing a composite glass body with drawing of concentric melts A method for producing an elongated composite glass body by melting at least two starting materials of different material compositions, feeding the starting materials to a drawing die disposed at the bottom of an externally heated melting crucible, and co...	11/15/1994
5213599	Method of manufacturing tube glass In the manufacture of tube glass, in which following the drawing of a tube from molten glass the inside surface of the tube is treated with a chemically reactive gas or gas mixture, a gas or gas mixture which is not reactive at the drawing temperature of ...	05/25/1993
5112376	Process and apparatus for the outer calibration of sections of glass tube A softened section of length of a glass tube is expanded in a dimensionally accurate mold until it has assumed the dimensions of the mold, the mold being made of a material of lower thermal expansion than that of the glass, so that, after cooling, the cal...	05/12/1992
4941904	Method and apparatus for forming hollow fibers The instant invention relates to a method and apparatus for the production of hollow glass fibers using a novel tip design. It is believed that the success of the instant invention is due to the injection of pressurized gas to create a central lumen at di...	07/17/1990
4923497	Method for the continuous production of a tube or rod of vitreous fused silica A method for the continuous production of a tube or rod of vitreous fused silica. Silicon dioxide in particle form is heated in a crucible to the softening temperature and is withdrawn contiuously downward from a bottom outlet opening in which a shaping t...	05/08/1990
4846864	Method and apparatus for producing hollow glass filaments A feeder for the production of hollow glass filaments is comprised of tip assemblies wherein a tube positioned in the stream defining member is in communication with the gas in the fiber forming region immediately below the dischrge wall to form a gas fil...	07/11/1989
4758259	Hollow glass fiber bushing, method of making hollow fibers and the hollow glass fibers made by that method A method and apparatus for producing hollow glass fibers is described in which the glass from a bushing tip and the gas used to provide a lumen in fibers as they are drawn from the tip are fed from passages in the tip sized to provide desired inside to ou...	07/19/1988
4735642	Hollow glass fiber bushing assembly A fiber glass bushing is described which produces hollow glass fibers from a multiplicity of tips having air tubes centered inside of them. Modules for providing a common header for rows of tubes centered in rows of tips on the bushing bottom are shown al...	04/05/1988
4717607	Method of making a fluorescent lamp A method of making fluorescent lamps having increased brightness and improved maintenance by changing the surface chemistry of the inside surface of the glass tubing while the tubing is being manufactured. While the glass tubing is being drawn from a melt...	01/05/1988
4698082	Hollow fiber bushing and hollow fiber tip construction A bushing support system for anchoring hollow fiber forming tips in a fiber glass bushing is described. The truss like support for the air tubes and bushing tips insure minimal movement of the tips during bushing operation and that any movement is accompa...	10/06/1987
4544395	Cationic surface coating of flat glass A method of treating flat glass to reduce its vulnerability to scratching, e.g. during storage and/or transit, wherein a transparent film of a cationic surface active agent is adsorbed on the glass by applying an aqueous solution of the surface active age...	10/01/1985
4523939	Method for reducing striations in fused silica An improved method for melting silica material in a crucible and drawing off a fused silica tube therefrom having reduced air lines or striations. Bubble formation in the silica melt in the crucible is considerably reduced by supplying the exterior of the...	06/18/1985
4372771	Methods and apparatus for extruding articles A fused silica glass tube (26) is extruded from a melt (21) in a chamber (11) pressurized with an inert gas. A shield is placed in close, spaced, relation to the melt (21) surface during the gas pressure extrusion process to substantially eliminate losses...	02/08/1983
4350513	Method and apparatus for extruding glass tubes A glass tube extrusion apparatus (50) is comprised of a chamber (52) having a crucible (72) therein mounted within and spaced from an inductive heating coil (77). As a glass tube (170) is extruded from an annular opening (74) in the bottom of the crucible...	09/21/1982
4312659	Air support system for glass tubing alley The invention provides method and apparatus for supporting hot glass tubing drawn from a source of molten glass, on a cushion of air. A horizontally elongated chamber is disposed beneath the drawpath of the tubing and an elevated air pressure is maintaine...	01/26/1982
4175941	Internal coating process for glass tubing A transparent, electrically conductive film of tin oxide is formed on the inner surface of tubing or blown glassware by dispensing therein a solution containing tin chloride and hydrofluoric acid. The solution is dispensed while the glassware is being for...	11/27/1979
4155733	Optical fibre manufacture A continuous flow process is disclosed in which optical fibre is made by a method involving the chemical vapor deposition of material upon the bore of a tube. The tube is fabricated from an annular crucible around a vertical gas feed and is lowered throug...	05/22/1979
4078909	Method for the production of thread-like capillaries Thread-like capillary tubes are formed by spinning molten glass material through an annular orifice, blowing a gas centrally into the tube issuing from the orifice, drawing the gas filled tube away from the orifice and controlling the flow rate and pressu...	03/14/1978
4067709	Optical transmission line A flexible hollow glass tube of optical fiber dimensions provides a central light passage and serves as an optical transmission line characterized by substantially less absorption and distortion of signals superposed on transmitted light waves. A metal ro...	01/10/1978
4023953	Apparatus and method for producing composite glass tubing There is disclosed a method of making composite glass tubing, and a molten glass feeding apparatus uniquely designed to carry out such method. The feeder apparatus comprises concentrically-arranged cylindrical containers, a blow tube located within the ce...	05/17/1977
3982918	Process for preparing a copper containing sealing glass A copper oxide containing seal glass is formed by a controlled low temperature process which reduces the formation of seeds in the glass. In one embodiment the glass is prepared in two portions with the first portion containing the high melting oxides and...	09/28/1976
3930830	Method for producing glass articles A method for forming a glass article of a devitrifiable glass having an optimum working temperature in the vicinity of its liquidus temperature, wherein the temperature of the molten glass is, during the molding operation, maintained at considerably highe...	01/06/1976

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Class 65/86 - Drawing and simultaneously forming hollow stock from molten glass