With Sealing Off Of Gas Evacuating Opening Patents (Class 65/34)
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Patent number: 6487878Abstract: A method for manufacturing a discharge tube, including heating a quartz tube by irradiation and closing it shut, is presented, in which variation of the heating temperature of the quartz tube can be reduced. Laser light is irradiated on a portion of the quartz tube, and in the step of sealing the portion of the quartz tube onto which laser light has been irradiated, the laser light is scanned while oscillating back and forth. The intensity of the laser light is controlled such that the intensity of the laser light when the size of a displacement of the laser light is maximal is smaller than the intensity of the laser light when the size of the displacement of the laser light is minimal.Type: GrantFiled: January 25, 2000Date of Patent: December 3, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Takeshi Meguro, Masaji Sakamoto, Kenji Hirai, Motomi Sakoda
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Patent number: 6489717Abstract: The method herein shapes a thin glass article (10), as well as a thin glass interface (20, 22) between two laminated sheets (16, 18) as they seal together to form the glass article (10). This process changes the shape of the article (10) and modifies the internal interface (20, 22) at the juncture where the glass sheets (16, 18) meet to make the channels (12). As a result, the juncture is very thin and very little or no slope. The process uses the mechanical motion of a plunger combined with plunger vacuum and internal gas pressure to make these changes. The technique reduces the contact area between glass layers (16, 18). A reduced contact area can reduce the optical interference caused by the joining of two layers of glass (16, 18). The technique also makes the front surface of each channel (12) thinner. The glass thinness also allows for thinner products with substantially reduced light distortion at the juncture.Type: GrantFiled: September 5, 2000Date of Patent: December 3, 2002Assignee: Corning IncorporatedInventor: Stephen R. Allen
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Publication number: 20020121111Abstract: There is provided a method of manufacturing a glass panel and the glass panel manufactured by the method, which makes it possible to minimize the projection amount from the glass sheet surface for improved appearance and for reduced possibility of breaking-up of the depressurized condition resulting from contact with an object and also to reliably seal the vent with a relatively easy step. A number of spacers (2) are disposed between a pair of glass sheets (1A, 1B). Outer peripheries of the glass sheets (1A, 1B) are sealed with an outer periphery sealing portion (3) to form a gap (V) between the glass sheets (1A, 1B). A vent (4) is formed in one (1A) of the glass sheets (1A, 1B) for evacuating gas from the gap (V). The gas in the gap (V) is evacuated via the vent (4) to depressurize the gap (V), and then the vent (4) is sealed. A metal solder (6) is employed as a sealing material for sealing the vent (4).Type: ApplicationFiled: October 30, 2001Publication date: September 5, 2002Inventors: Hideo Yoshizawa, Hisakazu Yasui, Shunji Kuramoto
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Publication number: 20020035852Abstract: A vacuum insulating glass (IG) unit and method of manufacturing the same. A peripheral or edge seal (11) of a vacuum IG unit is formed utilizing microwave energy (17) in order to enable tempered glass sheets (2, 3) of the IG unit to retain a significant portion of their original temper strength. In certain exemplary embodiments, the edge seal may be formed of glass frit or solder glass. In certain embodiments, at least a portion (12, 12a, 301) of the edge seal material may be deposited on one or both substrates prior to a thermal tempering process so that during tempering the edge seal material is permitted to diffuse into (i.e., bond to) the glass substrate(s) (2, 3). Optionally, additional edge seal material (303) may be added after tempering. The final edge seal (11) is preferably formed via microwave heating (17) of the edge seal material.Type: ApplicationFiled: February 7, 2001Publication date: March 28, 2002Inventors: Yei-Ping (Mimi) H. Wang, Anthony V. Longobardo
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Patent number: 6301932Abstract: 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 mold cavity (22) possessing at least one channel-forming groove (22) and a peripheral surface, wherein the first length (18) overlies the mold cavity (22) and the peripheral surface; b) allowing the first length of the molten glass ribbon (18) to substantially conform to the contour of the mold cavity (22) resulting in the formation of at least one channel in the first length of the molten glass ribbon (18); c) delivering and depositing a second length of the molten glass ribbon (26) to the exposed surface of the first length of the molten glass ribbon (18).Type: GrantFiled: May 20, 1999Date of Patent: October 16, 2001Assignee: Corning IncorporatedInventors: Stephen R. Allen, James G. Anderson, Robert J. Kiphut, Jackson P. Trentelman
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Patent number: 6021648Abstract: A flat glass panel 1 for a picture display device of the flat type, is formed by two glass cover plates (3, 5) with at least one glass plate (4, 4', 4", . . . ) between them, and a vitreous frit (8) between the cover plates along the outer edges of the cover plates so as to obtain a box-type glass panel in which a channel structure is present. After heating to the melting temperature of the frit (8), the panel is cooled down to a transitional temperature of the frit, while the space between the cover plates is partly exhausted during the cooling-down phase at a temperature which lies between the melting temperature and the transitional temperature of the frit. Then the temperature is kept constant at approximately the transitional temperature until the frit has become undeformable, said space (13) between the cover plates (3, 5) being fully evacuated then. Finally, cooling-down continues to room temperature, and the space (13) inside the panel is hermetically sealed off.Type: GrantFiled: April 17, 1998Date of Patent: February 8, 2000Assignee: U. S. Philips CorporationInventors: Maarten H. Zonneveld, Pieter J. Q. Van Voorst Vader, Jacob Brinkert
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Patent number: 6000243Abstract: A process for effectively bonding arbitrary size or shape substrates. The process incorporates vacuum pull down techniques to ensure uniform surface contact during the bonding process. The essence of the process for bonding substrates, such as glass, plastic, or alloys, etc., which have a moderate melting point with a gradual softening point curve, involves the application of an active vacuum source to evacuate interstices between the substrates while at the same time providing a positive force to hold the parts to be bonded in contact. This enables increasing the temperature of the bonding process to ensure that the softening point has been reached and small void areas are filled and come in contact with the opposing substrate. The process is most effective where at least one of the two plates or substrates contain channels or grooves that can be used to apply vacuum between the plates or substrates during the thermal bonding cycle.Type: GrantFiled: April 27, 1998Date of Patent: December 14, 1999Assignee: The Regents of the University of CaliforniaInventors: James C. Davidson, Joseph W. Balch
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Patent number: 5979187Abstract: In a method of forming a glass to metal seal between one end of a glass lamp tube (for, for example, a flash lamp or laser lamp), a metal rod which is terminated by the electrode is heated, and has molten glass sealing material applied thereto to form a beaded sleeve. The tube to which the electrode is to be attached is heated, and further sealing material is applied to the end of the tube so as to create a dome of material which closes off that end. Excess sealing material is then removed from the dome so as to leave an annulus of sealing material around the end wall of the, now open, tube. The electrode and rod can then be inserted into the tube until the bead on the rod is near the annulus at the end of the tube, and the tube can be worked, while being rotated, down to form a frusto-conical end such that movement of the bead relative to the annulus then brings the two into contact while a positive gas pressure is maintained within the tube.Type: GrantFiled: December 16, 1996Date of Patent: November 9, 1999Inventors: Martin Ross Churchley, Janusz Karol Lewandowski
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Patent number: 5903097Abstract: A method of manufacturing a side glass for a vacuum fluorescent display is provided wherein a glass is cut to a predetermined length in accordance with the size of the vacuum fluorescent display. The glass is then bent to coincide two ends of the glass in accordance with the shape of the vacuum fluorescent display, and the two ends of the glass are adhered to one another. A sealing frit is applied on the upper side of the glass, and is plasticized and cured.Type: GrantFiled: December 29, 1997Date of Patent: May 11, 1999Assignee: Samsung Display Devices Co., Ltd.Inventor: Yong-kyu Lee
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Patent number: 5897927Abstract: A method for permanently sealing an ultra-high vacuum within a glass enclosure. This is accomplished by first forming a hole, either in one of the flat plates that form the enclosure or in one of the standoffs that separate the plates, and then sealing a metal tube to the glass. In one embodiment, the metal tube is positioned so as to be partly inside the hole while in another a flange at the end of the tube is positioned to cover the hole. In both cases, a glass frit paste is then applied all around the glass metal interface. This is followed by heating so that the frit softens and becomes a glass-to-metal seal. Once the structure has cooled down the attached metal tube is used as a pumping port to evacuate it and, while still under vacuum, the metal tube is pinched off to form a permanent seal.Type: GrantFiled: June 30, 1997Date of Patent: April 27, 1999Assignee: Industrial Technology Research InstituteInventors: Kuang-Lung Tsai, Chung-Hsing Chao, Wei-Chiang Chen
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Patent number: 5858046Abstract: The present invention is directed to a method for forming glass articles containing internal enclosed channels.Type: GrantFiled: April 29, 1996Date of Patent: January 12, 1999Assignee: Corning IncorporatedInventors: Stephen R. Allen, James G. Anderson, Albert M. Gossie
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Patent number: 5855638Abstract: A process for producing a vacuum in an insulating glazing composed of two glass sheets (2, 3) separated by pins (4). According to the invention, one of the glass sheets includes a hole (12) which is plugged by a softened ball after the vacuum has been achieved. The invention also relates to an insulating glazing whose glass sheets are separated by pins (4) and joined at their periphery by a sealing joint.Type: GrantFiled: April 10, 1997Date of Patent: January 5, 1999Assignee: Saint Gobain VitrageInventor: Yves Demars
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Patent number: 5733162Abstract: Improved methods of exhausting and combined exhausting and seasoning of x-ray tube envelopes for high performance x-ray system having a rotating anode therein which includes providing a glass tubulation having a diameter greater than about 20 mm then operatively connecting the glass tubulation to the x-ray tube envelope, providing a disk inside the glass tubulation, the disk having a smaller diameter than the glass tubulation, providing a vacuum to the glass tubulation; positioning heating means on the outside of the glass tubulation, heating the anode of the x-ray tube to a temperature temperatures inside the x-ray tube envelope of about 1500.degree. C., positioning the disk inside the glass tubulation proximate the position of the heating means on the outside of the glass tubulation, heating the glass tubulation proximate the disk to about 1300.degree. C.Type: GrantFiled: October 2, 1995Date of Patent: March 31, 1998Assignee: General Electric CompanyInventors: Mark Gilbert Benz, Robert John Zabala, Thomas Robert Raber, William Joseph Jones
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Patent number: 5733159Abstract: Systems and methods are disclosed for exhausting and combined exhausting and seasoning of x-ray tubes having glass envelopes for a high performance x-ray system having a rotating anode therein. The methods include providing a glass tubulation having a diameter greater than about 20 mm, then operatively connecting the glass tubulation to the x-ray tube glass envelope, providing a glass sealing cup inside the glass tubulation, the glass sealing cup having a smaller diameter than the glass tubulation, providing a vacuum to the glass tubulation, positioning a heater on the outside of the glass tubulation, heating the anode of the x-ray tube to a temperature inside the x-ray tube glass envelope of about 1500.degree. C., positioning the glass sealing cup inside the glass tubulation proximate the position of the heating means on the outside of the glass tubulation, heating the glass tubulation proximate the glass sealing cup to about 1300.degree. C.Type: GrantFiled: December 22, 1995Date of Patent: March 31, 1998Assignee: General Electric CompanyInventors: Thomas Robert Raber, William Joseph Jones, Michael Patrick Dennin
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Patent number: 5722868Abstract: Systems and methods are disclosed for exhausting and combined exhausting and seasoning of x-ray tubes having glass envelopes for high performance x-ray system having a rotating anode therein. The system and methods include providing a glass tubulation having a diameter greater than about 20 mm; then operatively connecting the glass tubulation to the x-ray tube glass envelope; providing a metal disk inside the glass tubulation, the metal disk having a smaller diameter than the glass tubulation, providing a vacuum to the glass tubulation; heating the anode of the x-ray tube to a temperature inside the x-ray tube envelope of about 1500.degree. C.Type: GrantFiled: December 22, 1995Date of Patent: March 3, 1998Assignee: General Electric CompanyInventors: Thomas Robert Raber, William Joseph Jones, Michael Patrick Dennin
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Patent number: 5681198Abstract: A method of evacuating and sealing a cathode ray tube, CRT, using softened glass frit to seal the exhaust hole through which the CRT is evacuated. A three way branch tube allows a shaft driven by a linear motion means to cover the exhaust hole with a sealing plug or plate and softened vitreous glass frit while the CRT is being evacuated. In one embodiment a getter is also used. Since the CRT is being evacuated when the vitreous glass frit is softened any gases evolved from the softened glass frit are removed by the vacuum pump and are not a problem to the sealed CRT.Type: GrantFiled: October 15, 1996Date of Patent: October 28, 1997Assignee: Industrial Technology Research InstituteInventors: Chao-Chi Peng, Lyuji Ozawa
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Patent number: 5609934Abstract: An insulation panel is formed comprising a binderless, heat bonded glass fiber insulation board encapsulated within a partially evacuated, gas-tight envelope. The insulation board is formed by laying down discrete length glass fibers into a thin glass fiber mat with the glass fibers lying predominately in and randomly oriented in planes extending substantially parallel to the major surfaces of the thin glass fiber mat. The thin glass fiber mat is layered to form an uncompressed thick glass fiber blanket. The thick glass fiber blanket is heated to a temperature between about 25.degree. C. below and about 20.degree. C. above the strain temperature of the glass fibers; compressed to its final thickness and density; and cooled to form the binderless, heat bonded glass fiber insulation board having glass fibers lying predominately in planes which extend parallel to the major surfaces of the insulation board. The insulation board is encapsulated within the gas-tight envelope to form the insulation panel.Type: GrantFiled: January 5, 1995Date of Patent: March 11, 1997Assignee: Schuller INternational, Inc.Inventor: Ralph M. Fay
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Patent number: 5324337Abstract: A fiberglass product usable as an end product or an intermediate product is formed as a pack in a forming station but only 1/7th of the conventional quantity of binder is applied. After curing to a self-sustaining form, additional binder is added at a location remote from the forming station in an amount in excess of the amount required in the final product and then the excess binder and moisture is removed by one or more vacuum stripping steps.Type: GrantFiled: December 29, 1992Date of Patent: June 28, 1994Assignee: Knauf Fiber Glass GmbHInventor: Clarence H. Helbing
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Patent number: 5320659Abstract: A surface of an optical fiber is coated by a method for coating a surface of an optical fiber with carbon comprising steps of introducing an optical fiber in a reaction chamber in the same direction as the flow of a coating raw material comprising carbon, hydrogen and halogen atoms and depositing on the surface of the optical fiber a carbon layer formed from the raw material by chemical vapor deposition, whereby the coated optical fiber has improved initial tensile strength and absorbs less hydrogen.Type: GrantFiled: March 2, 1993Date of Patent: June 14, 1994Assignee: Sumitomo Electric Industries, Ltd.Inventors: Yoichi Ishiguro, Masaharu Ooe, Kohei Kobayashi, Gotaro Tanaka, Minoru Watanabe
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Patent number: 5312472Abstract: A method for affixing the optics of a laser to the laser tube, comprising: providing a substrate seat, coupling a substrate to the seat, coating the substrate with a multilayer thin film coating, and securing the substrate seat to the laser tube. In a further aspect, a method for manufacturing a resonant cavity is disclosed, the method comprising: providing a laser tube having first and second ends, securing a substrate mount, having a coated output coupler secured thereto, into one end of the laser tube, securing a substrate mount, having a coated reflecting mirror secured thereto, into the other end of the laser tube, and sealing the laser tube.Type: GrantFiled: September 23, 1992Date of Patent: May 17, 1994Assignee: Spectra-Physics Lasers, Inc.Inventor: William A. Shull
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Patent number: 5298047Abstract: The presence of (typically unintended) birefringence in single mode optical fiber can severely limit the usefulness of the fiber for, e.g., high bit rate or analog optical fiber communication systems, due to the resulting polarization mode dispersion (PMD). It has now been discovered that PMD can be substantially reduced if, during drawing of the fiber, a torque is applied to the fiber such that a "spin" is impressed on the fiber. Desirably the torque is applied such that the spin impressed on the fiber does not have constant spatial frequency, e.g., has alternately clockwise and counterclockwise helicity. At least a portion of optical fiber according to the invention has a spin whose spatial frequency exceeds 4 spins/meter.Type: GrantFiled: August 3, 1992Date of Patent: March 29, 1994Assignee: AT&T Bell LaboratoriesInventors: Arthur C. Hart, Jr., Richard G. Huff, Kenneth L. Walker
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Patent number: 5288255Abstract: A high pressure discharge lamp having a translucent sintered aluminum oxide discharge envelope is produced by a method that includes providing a ceramic end plug having an aperture for a current lead-in member in an end of the envelope, sintering the end plug to the envelope and passing the current lead-in member through the plug so as to extend into the envelope, forming a thin disc-shaped sealing member formed of magnesium oxide containing glass frit and having an aperture for the lead-in member on the outer surface of the plug, positioning a thin barrier member having an aperture for the lead-in member on and extending over the outer surface of the sealing member and heating the assembly so as to cause the sealing member to melt and form a glass bond between the lead-in member and the plug and the barrier member to melt and bond to the glass seal.Type: GrantFiled: October 27, 1992Date of Patent: February 22, 1994Assignee: North American Philips CorporationInventors: Dale E. Brabham, Geert van Bockstal
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Patent number: 5225252Abstract: A glass vacuum flask coating method comprising a step to put a metal material in the gap between an inner flask and an outer flask before said inner and outer flasks being formed into a blank for a glass vacuum flask, after the process of exhausting and tipping-off said metal material being heated by a magnetic field generated from an inductance coil into a metal vapor inside said gap, permitting said metal vapor to be adhered to the glass surface inside said gap, forming into a metal reflecting film thereon.Type: GrantFiled: January 23, 1992Date of Patent: July 6, 1993Inventors: Ming-Wen Chang, Yu-Cheng Chuang
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Patent number: 5212762Abstract: A method and apparatus for producing a polymer-clad silica (PCS) optical fiber comprising a core of a transparent inorganic glass and a cladding of a transparent organic polymer characterized in that the amount of volatile components in its cladding is not more than 1 wt %, which method and apparatus comprise forming the core fiber, forming the cladding around the core fiber, and treating the cladding with a far infrared heater.Type: GrantFiled: September 29, 1992Date of Patent: May 18, 1993Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Katsuhiko Shimada, Tsuneo Takano, Osamu Itamoto, Michisuke Edamatsu, Yasuo Hiromoto
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Patent number: 5174802Abstract: A process for manufacturing various series of plug-in light bulbs wherein a glass tube used in making a Wedge lamp having an increasing diameter toward one end, inserting two conductive wires and a button rod within this tube integrated with its bottom end by heating, pinching and attaching three filaments to the top portion of the button rod by heating and connecting to the conductive wires with a plurality of tungsten filaments to form a glow portion, inserting a bulb portion over the top end of the tube, then shaping a integral body by heating a lower portion of the tube rod slightly below the bottom end of the button rod, which is fused off by heating, the lower portion of the conductive wires being folded and stuck to the respective outside walls of the bottom end of the tube.Type: GrantFiled: September 16, 1991Date of Patent: December 29, 1992Inventor: Ming-hsun Hsu
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Patent number: 5092264Abstract: Drawn optical fiber is provided with at least one layer of a coating material. The coating material typically is a UV curable material and provides the optical fiber with mechanical and environmental protection. It has been found that the temperature at which the optical fiber is cured has a pronounced effect on the modulus of the cured coating material. In order to provide a coated optical fiber of which the coating material has a desired modulus, the temperature of the coating material during cure is controlled by controlling the amount of energy of infrared wavelength which impinges on the coating material.Type: GrantFiled: January 23, 1990Date of Patent: March 3, 1992Assignee: AT&T Bell LaboratoriesInventors: Bob J. Overton, Carl R. Taylor
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Patent number: 5006140Abstract: A process for the production of a glass or other mineral fibre composition in which glass or other mineral fibre is melted, the molten glass or mineral is forced through a plurality of openings to produce fibres, the hot fibres are sprayed with a water disperion of a binder and the fibres are dried at an elevated temperature, the binder comprising a gelatinized starch sulphamate product and a hydrophobic agent such as a silicone. The gelatinized starch sulphamate may be preformed by reacting a starch with a sulphamate salt or may be formed in situ by spraying onto the hot fibres a water dispersion of pregelatinized starch and a sulphamate salt. In this latter case part of the pregelatinized starch may be replaced by native starch.Type: GrantFiled: December 14, 1989Date of Patent: April 9, 1991Assignee: Cerestar Holding B. V.Inventors: Juergen Loercks, Horst Neisius
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Patent number: 5000772Abstract: In the manufacture of coated optical fiber, fiber (21) is drawn from a preform (22) and coated with one or preferably two layers (42,44) of light curable coating materials. Afterwards, the coating materials are cured. Increases in manufacturing line speed may be achieved if the cure speed of the coating materials is increased. This is accomplished by the simultaneous application of a magnetic field during irradiation of the curable coating materials to enhance the crosslinking of the coating materials by a free radical polymerization mechanism. Upon absorption of light, a photoinitiator in each composition cleaves to produce two free radical fragments in the spin paired or singlet state. The magnetic field has the effect of enhancing the production of spin parallel radicals which enhances the polymerization initiation of the coating material, thereby allowing an increase in the manufacturing line speed through drawing and coating apparatus.Type: GrantFiled: March 9, 1990Date of Patent: March 19, 1991Assignee: AT&T Bell LaboratoriesInventor: James R. Petisce
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Patent number: 4980091Abstract: A method and device for enabling a molten radioactive glass to be cast from a crucible (2) situated in a top cell (1) and a container (4) situated beneath said crucible in a bottom cell (3), the radioactive glass flowing vertically downwards along a casting axis through an opening provided in a concrete slab (5) which separates said cells, said device being characterized in that it comprises the following components in succession going downwardly: a deformable guide tube (11) constituted by two housings (14, 15) slidably mounted in each other, with the inner walls (20, 21) thereof being frusto-conical in shape, and the apex of said frusto-conical shape being situated beneath said guide tube, the top housing (14) being fixed beneath said concrete slab, the bottom housing (15) having an end wall (22) in the form of a portion of a sphere, and said two housings being interconnected by a metal bellows (23); and a moving tube (12) constituted by an enclosure (32) whose inside wall extends downwardly so as to be capType: GrantFiled: May 25, 1988Date of Patent: December 25, 1990Assignee: Compagnie Generale des Matieres NucleairesInventor: Serge Joutel
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Patent number: 4908297Abstract: Coating Compositions Photocurable coating compositions useful for coating optical glass fibres comprising:(a) a polyethylenically unsaturated polyurethane derived from a polyol having pendent fluoroalkyl groups;(b) an ethylenically unsaturated monomer which is a liquid solvent for the polyethylenically unsaturated polyurethane and is copolymerizable therewith, and(c) a photo-initiator composition.Type: GrantFiled: September 9, 1987Date of Patent: March 13, 1990Assignee: Imperial Chemical Industries PLCInventors: Robert A. Head, Steven Johnson
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Patent number: 4894078Abstract: In a method for producing an optical fiber having a resin coating, an optical fiber which is drawn from a preform for an optical fiber heated and melt by a heating source can be effectively cooled before it is coated with a resin by cooling the drawn fiber by cooling gas in such a manner that, in a first plane which is perpendicular to an axis of the drawn fiber or a first conical surface which has a cone point on the axis of the drawn fiber, the cooling gas is blown against the fiber from one direction on said first plane or said first cone surface, and in a second plane which is perpendicular to the axis of the drawn fiber and apart from said first plane or a second conical surface which has a cone point on the axis of the drawn fiber and is apart from said first conical surface, the cooling gas is blown against the fiber from other direction on said second plane or said second conical surface so that a sum of components of all vectors of the cooling gas in x and y dimensions in the three-dimensional spaceType: GrantFiled: October 3, 1988Date of Patent: January 16, 1990Assignee: Sumitomo Electric Industries, Ltd.Inventors: Hiroaki Takimoto, Katsuji Sakamoto
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Patent number: 4874415Abstract: An optical fiber (F) is pulled by a capstan (6) from a silica preform (1) whose bottom end (20) is softened in an oven (2). After cooling, said fiber is coated with an organic protective coating by means of a coating device (4). According to the invention, the surface of the fiber is reheated under tension by means of a torch (14) upstream from the covering device. Tension stresses in the softened surface layer are therefore relaxed. Cooling, followed by the fiber-drawing tension being removed after the capstan (6) cause said surface layer to be put under permanent compression, thereby reducing the risk of the fiber breaking. The invention is applicable to manufacturing fibers having improved characteristics.Type: GrantFiled: December 9, 1988Date of Patent: October 17, 1989Assignee: Alcatel N.V.Inventors: Jean-Yves Boniort, Jacques Leboucq
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Patent number: 4869932Abstract: A method of preventing the interaction of cationic softeners coated upon the surfaces of glass fibers with anionic polymers contained in aqueous baths used in forming the glass fibers into mats which comprises treating the fiber with at least 3 parts per million, of a water-soluble anionic vinyl polymer having a molecular weight range of from 500-50,000.Type: GrantFiled: September 12, 1988Date of Patent: September 26, 1989Assignee: Nalco Chemical CompanyInventor: John A. Romberger
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Patent number: 4822525Abstract: A process for preparing a cartridge for disposal of a radioactive waste liquid, which comprises filling glass fibers in a mold, heat-treating the fibers for partial fusion and molding them into a molded product of a predetermined shape, wherein at least one member selected from the group consisting of boric acid, silicic acid, lithium borate, lithium silicate, zinc borate, zinc silicate, an organic silane, a silica sol, an oil emulsion, and an alumina sol, is applied to the glass fibers or to the molded product.Type: GrantFiled: March 16, 1987Date of Patent: April 18, 1989Assignees: Doryokuro Kakunenryo Kaihatsu Jigyodan, Asahi Fiber Glass Company LimitedInventors: Noboru Endo, Yutaka Kikuchi, Kiichi Yamatsuta, Shoji Goto
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Patent number: 4818264Abstract: A multicapillary gas chromatography column comprising a bundle of single capillary columns each of which have essentially the same internal diameter and which are coated with essentially the same thickness of essentially the same stationary phase so that each column has essentially the same standard retention factor. A method of producing such a column is to cut a single fused silica capillary column into a number of essentially equal lengths and then to bundle the lengths together. Each bundle end can then be inserted into, for example, a graphite ferrule and then the multicapillary column can be conventionally installed into a gas chromatograph. The multicapillary column of the invention has the injection, detection and sample capacity advantages of a relatively large diameter capillary column with the speed and resolving power of a relatively narrow diameter capillary column.Type: GrantFiled: April 30, 1987Date of Patent: April 4, 1989Assignee: The Dow Chemical CompanyInventor: Marsha L. Langhorst
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Patent number: 4795392Abstract: For sure sealing of the evacuation tips of vacuum tubes, the electric power supplied to the heating resistor of the sealing furnace is regulated for each treatment stage, the set value is pre-selected and laid down by a computer for the corresponding power generator.Type: GrantFiled: June 15, 1987Date of Patent: January 3, 1989Assignee: VideocolorInventors: Clemente Ferragni, Enzo Miccinatti
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Patent number: 4792347Abstract: In the process for applying a protective plastic coating to a glass optical waveguide fiber by the application of a curable liquid coating material thereto and the subsequent curing of the liquid coating to a protective plastic layer, the surface of the glass optical fiber is conditioned prior to the application of the liquid coating material thereto by replacing air adjacent the fiber surface with a selected gas preferably exhibiting high solubility in the liquid coating composition and resisting bubble formation in the liquid coating layer as it is formed.Type: GrantFiled: September 25, 1986Date of Patent: December 20, 1988Assignee: Corning Glass WorksInventors: Charles W. Deneka, Gitimoy Kar, Thomas O. Mensah
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Patent number: 4769286Abstract: A composite reinforcing element, especially a reinforcing cable, having a core consisting of a thread of non-metallic material and being coated in a reinforced polymer, and a process for producing it.Type: GrantFiled: February 19, 1986Date of Patent: September 6, 1988Inventor: Georges Le Noane
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Patent number: 4766030Abstract: An oxonated poly (alkylene oxide) substantially devoid of hydrocarbon chains of 5 or more carbon atoms is used to treat substances bearing negative electrostatic charges, so as to reduce such charges without rendering the substance hyrophobic. In this manner static electricity can be reduced in textiles, paper or plastic film; glass or glass fibers can be lubricated; wood pulp can be debonded; anti-self sizing or water-dispersible paper can be made; clays, pigments and other minerals can be hydrophilized; bitumen can be recovered from oil or tar sands; and petroleum can be recovered from underground wells by secondary or tertiary recovery techniques.Type: GrantFiled: August 31, 1987Date of Patent: August 23, 1988Inventor: Laurence R. B. Hervey
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Patent number: 4725298Abstract: A low pressure mercury vapor discharge lamp forms an electric discharge path by the use of a bulb placed on an end plate and the bulb is formed by a process which results in the connecting outer side surfaces of juxtaposed glass tubes through communication holes formed in the outer side surfaces respectively. The process involves placing the juxtaposed glass tubes so that their outer surfaces are opposed in a contacting state. A portion of each of the glass tubes is heated in order to form a communication hole through the utilization of a burner inserted through an open end into the interior of each of the glass tubes in order to cause fusion of that particular portion in each tube to thereby form the communication hole by wind pressure.Type: GrantFiled: May 12, 1986Date of Patent: February 16, 1988Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Takao Takeda, Hitoshi Yamazaki, Yoshiteru Taniguchi, Norihiko Tanaka, Hiroshi Ito, Minoru Uchida, Jun Imai
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Patent number: 4707172Abstract: A device for transferring the energy emitted by a high power laser onto a target characterized in that it comprises two guides of optical fibre having step index refraction distribution and at least a plastic material coating. The first guide, stiffly coupled to the laser source, is a variable section fibre with an input face of larger diameter. Guide is the second one by a uniform or variable section fibre with a larger diameter near the output terminal. The two guides are joined by a low leakage optical fibre connector, and between them an adapter can be interposed if the output section of the first guide of fibre does not coincide with the input section of the second guide of fibre. The variable section fibre can be drawn from a pre-moulded or melted material, with the speed controlled by an electronic circuit. Different kinds of pots can be utilized in order to obtain the fibre plastic coating.Type: GrantFiled: February 22, 1985Date of Patent: November 17, 1987Assignee: Consiglio Nazionale Delle RicercheInventors: Stefano Sottini, Massimo Brenci, Riccardo Falciai, Vera Russo
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Patent number: 4689031Abstract: A compact fluorescent lamp employs an inner exhaust tubulation formed from glass which is opaque to a given range of electromagnetic radiation. The exhaust tubulation is non-invasively sealed after an outer lamp envelope is sealed by directing upon the exhaust tubulation an amount of such radiation sufficient to heat the tubulation to its softening point. The outer envelope is transparent to the given radiation which, in a preferred embodiment, is in the range of 400 nm to 2500 nm.Type: GrantFiled: June 2, 1986Date of Patent: August 25, 1987Assignee: GTE Products CorporationInventors: Andre C. Bouchard, Mark Grossman, William George
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Patent number: 4666494Abstract: Suction molds used in the suction removal process must first be prepared ore they can receive vitrified radioactive waste materials. A method is disclosed for preparing the suction mold which includes a suction pipe welded into the base of the mold with a desired-break location whereat the suction pipe is broken off during the suction removal process. An evacuation stub is mounted in the mouth of the suction pipe and communicates with the interior of the mold. The method of the invention includes evacuating the mold through the evacuation stub and then heating the mold to remove moisture and organic impurities. The mold is then filled with a dry inert gas and the evacuation stub is cleaned. The mold is then evacuated to a predetermined residual pressure. Thereafter, the evacuation stub is cold-press welded so as to close off the interior of the mold from the ambient.Type: GrantFiled: November 4, 1985Date of Patent: May 19, 1987Assignee: Deutsche Gesellschaft fur Wiederaufarbeitung von Kernbrennstoffen mbHInventors: Detlef Stritzke, Eckhart Ewest
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Patent number: 4620860Abstract: A novel process for the production of glass fiber products is provided. By the inventive process glass fibers are combined with a heat curable binder and then consolidated onto a conveyor where a glass fiber mass is placed onto the surface of the consolidated mass of glass fibers and heat curable binder. The resulting product is then subsequently cured and then coated on-line with a suitable coating. Glass fiber products made by the novel inventive process are also disclosed.Type: GrantFiled: July 23, 1985Date of Patent: November 4, 1986Assignee: Manville CorporationInventor: Kenneth D. Werbowy
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Patent number: 4613521Abstract: A lightguide fiber (21) which has been drawn from a preform in a furnace (26) and which has a relatively high temperature is cooled prior to its movement through an apparatus (41) which applies a coating to its outer surface. The fiber is cooled by moving it through a liquid material (42) in a reservoir (40) which is interposed between the furnace and the coating apparatus. The liquid material in the reservoir (40) is the same as the coating material contained in the apparatus that is used subsequently to coat the fiber.Type: GrantFiled: June 30, 1983Date of Patent: September 23, 1986Assignee: At&T Technologies, Inc.Inventor: James V. Smith, Jr.
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Patent number: 4612029Abstract: A method and apparatus for assembling and fusing glass to metal in a glass-metal electrical component is disclosed. The component includes a metallic shell formed with upper and lower cylindrical recesses connected together by longitudinal passages, a pair of metal rings and plural metal pins assembled to define electrical feed-throughs. The component parts are assembled on a fixture having a sleeve-like projection and a central mounting projection establishing concentric nesting surfaces to which the metal rings are slip-fitted in concentric alignment with each other spaced from sidewalls of the lower recess. The pins are in electrical contact with the metal rings. A glass pre-form is seated within the upper recess. The assembled structure is heated to a temperature sufficient to melt the glass pre-form which flows under gravity through the passages into the lower recess to provide an insulative seal between the metal parts.Type: GrantFiled: July 18, 1985Date of Patent: September 16, 1986Assignee: The United States of America as represented by the United States Department of EnergyInventors: Daniel P. Kramer, Richard T. Massey
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Patent number: 4608304Abstract: The present invention is directed to a process for coating glass fibers by(1) applying an aqueously dispersed, heat-curable coating composition containing(a) a water-dispersible epoxy resin component containing external and/or chemically incorporated non-ionic emulsifiers and(b) a water-dispersible, block polyisocyanate component containing chemically incorporated anionic hydrophilic groupsin a weight ratio of component (a) to component (b) of about 1:10 to 10:1 to glass fibers and(2) curing the coating composition at elevated temperature.The present invention is also directed to the coated glass fibers produced therefrom.Type: GrantFiled: February 8, 1985Date of Patent: August 26, 1986Assignee: Mobay CorporationInventor: James W. Rosthauser
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Patent number: 4596681Abstract: A method of forming a sealed capsule containing a submilligram quantity of mercury or the like, the capsule being constructed from a hollow glass tube, by placing a globule or droplet of the mercury in the tube. The tube is then evacuated and sealed and is subsequently heated so as to vaporize the mercury and fill the tube therewith. The tube is then separated into separate sealed capsules by heating spaced locations along the tube with a coiled heating wire means to cause collapse spaced locations therealong and thus enable separation of the tube into said capsules.Type: GrantFiled: January 4, 1984Date of Patent: June 24, 1986Assignee: GTE Products CorporationInventors: Mark W. Grossman, William A. George, Jakob Maya
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Patent number: 4594088Abstract: An apparatus (30) for cooling a lightguide fiber (21) drawn from a molten portion of a glass preform (22) located in a furnace (23). The apparatus (30) has an upper chamber (34) and a lower chamber (36) each having a small opening in the lower portions thereof. The upper chamber (34) has a heat transfer liquid (35) therein and the lower chamber (36) is pressurized to prevent liquid from passing through the opening. The hot fiber (21) is cooled by the liquid as it is drawn through liquid (35) without physical contact with the periphery of the openings.Type: GrantFiled: May 28, 1985Date of Patent: June 10, 1986Assignee: AT&T Technologies, Inc.Inventors: Un-Chul Paek, Charles M. Schroeder
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Patent number: 4560357Abstract: A compact fluorescent lamp employs an inner exhaust tubulation formed from glass. The exhaust tubulation is non-invasively sealed after an outer lamp envelope is sealed by directing upon the exhaust tubulation an amount of focused, coherent radiation sufficient to heat the tubulation to its softening point. The outer envelope is transparent to the given radiation.Type: GrantFiled: June 18, 1984Date of Patent: December 24, 1985Assignee: GTE Products CorporationInventors: Andre C. Bouchard, Mark W. Grossman