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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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5312471 |
Method and apparatus for the manufacture of large optical grade SiO.sub.2 glass preforms
The disclosed process involves the feeding of particulate SiO 2 into a rotating cylindrical furnace in which a gas plasma arc has been established, for melting the feed at a temperature of at...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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3912484 |
Method of glass delivery for press-forming
In the press-forming of hollow articles from molten glass, a stream of molten glass is fed vertically downwardly from a delivery orifice a distance of at least about five feet into a bottom portion...
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3909179 |
Bi-axially rotational synthetic resin molding machine
An inclined, bi-axially rotational molding machine for use in producing a synthetic resin container is disclosed, which comprises a cylindrical metal mold adapted to rotate about its own axis...
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3853520 |
METHOD FOR MAKING HOLLOW CYLINDERS OF VITREOUS SILICA BY VACUUM HEATING
Hollow cylinders and tubes are made from vitreous silica by placing granular or powdered quartz or silica starting material on a granular bedding layer in a hollow form revolving about its axis...
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3839003 |
METHOD OF PRESSING HOLLOW GLASS ARTICLES
Hollow funnel-like articles having relatively thick wall portions about an open mouth portion and relatively thin wall portions about a constricted yoke or neck portion are press-formed from molten...
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3661547 |
METHOD FOR MOLDING HOLLOW AND BOTTOMED GLASS ARTICLES
In mold-blowing a parison, which is glass in a still soft state, in a blow mold composed of two drum sections and one bottom section, the surface of the bottom section receiving the parison bottom...
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3660067 |
GLASS-FORMING APPARATUS
In the operation of a plunger to form the yoke area of an article centrifugally formed in a mold, a ball and socket assembly is provided between the plunger and its associated spindle which permits...
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3615329 |
A RECIRCULATORY SYSTEM FOR THE GRANULATION OF MOLTEN SLAG
A recirculatory system for granulating molten slag comprising water jet nozzle granulators and a receptacle which contains a settling separation section wherein the coarse slag particles are...
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3607163 |
METHOD FOR MAKING GLASS TUBES
This invention relates to a method of producing a tube from a glass that gives off undesirable vapors when heated in which glass cullet is placed into a horizontally disposed forming tube that is...
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3528792 |
METHOD OF SPIN CASTING GLASS CASING
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3506431 |
MOLD FOR THE CENTRIFUGAL FORMING OF MOLTEN GLASS
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3492146 |
METHOD AND APPARATUS FOR APPLYING GLASS TO EDGE OF TELEVISION TUBE
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3474000 |
VIBRATING WALL CONTINUOUS CASTING DEVICE WITH STARTER MEANS
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3471280 |
CYLINDER SPINNING WITH SMOOTHING FEED MEANS
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3463624 |
METHOD OF MANUFACTURING GLASS PAPERWEIGHTS
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3459527 |
CENTRIFUGAL FORMING MOLD
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3451794 |
METHOD FOR MELT-CASTING INFRARED TRANSMITTING GLASSES
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3376186 |
Centrifugally cast hollow glass body
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3360353 |
Apparatus for drawing glass in cylindrical form
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3293024 |
Apparatus for the centrifugal molding of articles in split molds
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3288585 |
Method of making a miniature lens
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3282667 |
Method of making hollow glass fibers
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3282666 |
Process for manufacturing fiber optic devices
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3245770 |
Continuous cylinder spinning of glass
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3236619 |
Glass tube forming apparatus
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3222142 |
Synthesis of large crystals of fluorphlogopite mica
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3220102 |
Method of forming sheet material
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3214255 |
Method and device for the mass production of glass rod and glass tube
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