Class 65/71 - Spreading of molten glass by rotation

Subclass of Class 65 - Glass manufacturing
Definition: Processes which include the step of spreading the molten
No. of patents: 24
Last issue date: 03/18/2008

Number	Title	Issue Date
7343761	Device for producing a glass rod A device for the production of a glass rod is provided. The device has a Danner blowpipe constructed to avoid problems attributed to different heat expansion coefficients of the participating materials. The Danner blowpipe has an outer metal jacket surrounding a cer...	03/18/2008
6916370	Quartz glass crucible for pulling up silicon single crystal and method for producing the same An object of the invention is to provide a quartz glass crucible for pulling up silicon single crystal and a method for producing the same, suitable for improving the productivity of the crucible and the quality of the silicon single crystal, which, by forming a cry...	07/12/2005
6447601	Crystal puller and method for growing monocrystalline silicon ingots A crystal puller for growing monocrystalline silicon ingots according to the Czochralski method includes a housing and a crucible in the housing for containing molten silicon. The crucible has a side wall having a transmittance of at least about 80% gener...	09/10/2002
6143073	Methods and apparatus for minimizing white point defects in quartz glass crucibles Methods and apparatus for manufacturing silica crucibles 9 containing few, if any, white point defects. The white point defects are reduced by decreasing the amount of silica vapor condensing on electrodes 4,5,6 used in the manufacturing process. The sili...	11/07/2000
5917103	Method of manufacturing crucible for double-crucible crystal growing technique Quartz powder is fed into a rotating mold to form a crucible-like quartz powder layer body with the help of centrifugal force in the mold. The layer is melted by heating through the inner surface with an arc discharge to manufacture an outer crucible memb...	06/29/1999
5762672	Method for producing a quartz glass crucible In a quartz glass crucible obtained by heating and fusing a rotating layer (3) charged with a powder of silicon dioxide, impurity elements are controlled so that copper, chromium, and nickel each amount to 0.5 ppb or less, iron amounts to 120 ppb or less,...	06/09/1998
5573566	Method of making a quartz dome reactor chamber A method of making a quartz dome for a reactor chamber from a substantially flat quartz disk. The quartz disk is placed on a graphite ring which is rotated. The quartz disk is heated until the disk is softened slightly and it begins to slump. The softened...	11/12/1996
5401289	Method of making halide fibers including casting under a reduced pressure Halide glass articles, e.g. rods, tubes and preforms for making fluoride glass fibres, are prepared by melting and/or casting the articles under a low pressure, e.g. 0.01 to 500 mbars and, during the low pressure regime, a gas flow rate of between 0.01 to...	03/28/1995
5312471	Method and apparatus for the manufacture of large optical grade SiO₂ glass preforms The disclosed process involves the feeding of particulate SiO2 into a rotating cylindrical furnace in which a gas plasma arc has been established, for melting the feed at a temperature of at least 2400° C. The feed rate is regulated so that th...	05/17/1994
5174801	Manufacture of quartz glass crucible for use in the manufacture of single crystal silicon A quartz glass crucible for use in a process for pulling a single crystal silicon and having an outer layer and an inner layer. The outer layer contains less than 0.3 ppm each of Na, K and Li and more thant 5 ppm of Al. The outer layer further contains bu...	12/29/1992
5055120	Fluoride glass fibers with reduced defects Improved fluoride glass optical fibers are produced by a process introducing several improvements in the production of fluoride glass preforms and the drawing of fibers therefrom. Reduced bubble formation and crystallization are obtained by vertically spi...	10/08/1991
5015279	Apparatus for extracting spin cast fused silica objects Apparatus for removing a fused silica glass object from a rotating pot has a gripping member which grips the upper rim of the fused silica glass object and a rotational synchronization member connected to the gripping member which is lowered vertically in...	05/14/1991
4964902	Method of extracting spin cast fused silica This invention relates to a method of making an object of silica glass, such as a crucible, according to which a pot capable of rotating about its axis is filled with a refractory pulverulent material. The pot is rotated and a cylindrical cavity is formed...	10/23/1990
4935046	Manufacture of a quartz glass vessel for the growth of single crystal semiconductor A quartz glass crucible adapted for use in a process for pulling a single crystal semiconductor material having an opaque outer substrate of a quartz glass with a relatively high bubble content and an inner transparent glass layer which is substantially f...	06/19/1990
4822397	Method for making taxidermic eyes A method of manufacturing taxidermic glass eyes and the like utilizes flat sheets of glass. This glass is printed with the markings and coloring for the eye image. The printing is accomplished by silk screening or other production methods. The eye is then...	04/18/1989
4729780	Centrifugal casting device A centrifugal casting device adapted to mold and cast a casting material melted by a casting material melting means, by the centrifugal force of a rotary arm, in a mold disposed on the centrifugal side of the arm through a casting crucible disposed at one...	03/08/1988
4713104	Quartz glass crucibles A flat-bottomed quartz glass crucible for the manufacture of monocrystalline silicon is made by disposing granular quartz particles on a flat base in a cylindrical mold. A vacuum is drawn on the particles through vacuum holes in the base to retain the par...	12/15/1987
4662924	Method for molding calcium phosphate type glass A method for molding calcium phosphate type glass, which comprises pouring a melt of calcium phosphate into a mold, and cooling and solidifying it, wherein the mold contains boron nitride at least at the surface thereof....	05/05/1987
4632686	Method of manufacturing quartz glass crucibles with low bubble content In the manufacture of a quartz glass crucible of low bubble content, a first layer of granular quartz material is disposed on the interior of a rotating mold through the walls of which a vacuum can be drawn. A second layer of finer quartz material is then...	12/30/1986
4392805	Centrifugal casting apparatus A centrifugal casting apparatus comprises a mold mounted for rotation about the vertical axis thereof and having a bottom provided with a through axial opening. A member having a helicoidally shaped surface is axially mounted within the opening in the bot...	07/12/1983
4217124	Method of forming conoid surfaces Conoid surfaces can be generated by rotation of a material at different angles and under differing constraints. An axis of 45° can produce hyperboloids; with perpendicular axes, concentric spheres can be produced; magnetic fields can be used to shape the...	08/12/1980
4212661	Method for the manufacture of hollow fused quartz or fused silica ingots The method of manufacturing an ingot includes the steps of rotating a housing having an inner surface which defines an opening therethrough, the housing containing a layer of insulating material between the housing outer surface and the inner surface, dep...	07/15/1980
4010020	Apparatus for forming curved surfaces by rotation Conoid surfaces can be generated by rotation of a material at different angles and under differing constraints. An axis of 45° can produce hyperboloids; with perpendicular axes, concentric spheres can be produced; magnetic fields can be used to shape the...	03/01/1977
4000999	Centrifugally casting hollow glass body around vapor shield A vapor shield supporting ring is attached to the envelope of a vacuum device. The supporting ring is embedded in the inner wall of the envelope and extends into the interior of such envelope. A welding flange is mounted on the interior portion of the rin...	01/04/1977

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Class 65/71 - Spreading of molten glass by rotation