With Annealing Or Tempering Of Glass Patents (Class 65/41)
  • Publication number: 20150101367
    Abstract: The present invention provides a process for manufacturing glass tube shell of electrodeless lamp, which comprises seven steps: washing, coating, bepowdering, wiping off, abutting and annealing, wherein the coating step introduced in the present invention is primarily for increasing the evenness and densification degree of the inner wall of the glass tube, so as to guarantee the adhesion homogeneity of the step of bepowdering; besides, the present invention uses multi-step temperature controlling process for steps of coating, bepowdering and baking to effectively guarantee the coating thickness, and increase the productivity by 50%, in addition, a fan is introduced to align to the entrance of the glass tube when baking the powder, so as to increase the entrance of oxygen, and improve the baking efficiency, at last, high temperature annealing is performed to the joint to eliminate the stress after abutting.
    Type: Application
    Filed: May 23, 2012
    Publication date: April 16, 2015
    Applicant: GUANGDONG ELX LIGHTING TECHNOLOGY CO., LTD.
    Inventors: Guozhen Tan, Wenfeng He
  • Publication number: 20150027168
    Abstract: A method of sealing a workpiece comprising forming an inorganic film over a surface of a first substrate, arranging a workpiece to be protected between the first substrate and a second substrate wherein the inorganic film is in contact with the second substrate; and sealing the workpiece between the first and second substrates as a function of the composition of impurities in the first or second substrates and as a function of the composition of the inorganic film by locally heating the inorganic film with a predetermined laser radiation wavelength. The inorganic film, the first substrate, or the second substrate can be transmissive at approximately 420 nm to approximately 750 nm.
    Type: Application
    Filed: May 7, 2014
    Publication date: January 29, 2015
    Applicant: CORNING INCORPORATED
    Inventors: Leonard Charles Dabich, II, Stephan Lvovich Logunov, Mark Alejandro Quesada, Alexander Mikhailovich Streltsov
  • Publication number: 20150024151
    Abstract: A low pressure air or vacuum glass and manufacturing method thereof, the low pressure air or vacuum glass comprising upper glass and lower glass; the upper glass and the lower glass are flat glass or convex glass; the peripheries of the upper glass and the lower glass are provided with an edge sealing bar frame and/or an edge sealing groove, and are welded together via a low temperature glass solder, thus forming a closed low pressure air layer or vacuum layer therebetween. The low pressure or vacuum glass is of simple manufacturing process, low cost, high production efficiency, reliable sealing connection, and good sealing effect.
    Type: Application
    Filed: March 21, 2013
    Publication date: January 22, 2015
    Inventor: Changhong Dai
  • Publication number: 20140370209
    Abstract: Certain example embodiments of this invention relate to coated articles including substrates that support printed patterns and thin film layer stacks that can have the patterns and the layer stacks formed thereon and then be cut, heat treated, and optionally built into an insulated glass unit, laminated to another substrate, and/or used in another product. In certain example embodiments, this is made possible by bonding to the glass the frit material used in forming the pattern, re-annealing the glass following the bonding, disposing the thin film layer stack on the re-annealed substrate supporting the bonded pattern, and then cutting and heat treating. The frit advantageously does not re-melt during heat treatment because the melting temperature is higher than the temperature used in heat treatment. Associated methods also are provided.
    Type: Application
    Filed: June 17, 2013
    Publication date: December 18, 2014
    Applicant: Guardian Industries Corp.
    Inventor: Matthew S. WALP
  • Publication number: 20140301697
    Abstract: The invention is a method for structuring a flat substrate composed of glass material in the course of a viscous flow process. The glass flat substrate is joined to a surface of a flat substrate, which is preferably a semiconductor flat substrate, having at least one depression bounded by a circumferential edge located in the surface. In the course of a subsequent tempering process, glass material is changed to a viscous free-flowing state in which at least proportions of the free-flowing glass material of the flat substrate flow over the circumferential edge into the depression in the flat substrate.
    Type: Application
    Filed: August 2, 2012
    Publication date: October 9, 2014
    Inventors: Norman Marenco, Hans-Joachim Quenzer
  • Patent number: 8826693
    Abstract: An apparatus and method for heat treating a plurality of glass substrates. The glass substrates are supported on support platform and housed in a heat treating furnace. The substrates are supported in a substantially vertical orientation by restraining pins extending through walls of the furnace, and are separated from each other by frame-shaped spacing members. The spacing members reduce convection currents between the substrates and reduce or eliminate the post-heat treating distortion of each glass substrate to less than 100 ?m over the entire surface of the substrate.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: September 9, 2014
    Assignee: Corning Incorporated
    Inventors: Frank T. Coppola, Monica J. Mashewske
  • Publication number: 20130258569
    Abstract: Disclosed are methods for making an enclosure having a three-dimensionally shaped glass wall portion comprising an initial step of shaping a glass charge into a preform having a preform cross-section corresponding in shape to a smaller cross-sectional shape for the three-dimensional glass wall portion. At least a surface portion of the preform is then finished if necessary to remove any visible optical surface defects therefrom and/or to meet geometric tolerances, and the preform is drawn along an elongation axis perpendicular to the preform cross-section to reduce or draw down the preform in size to the smaller cross-sectional shape for the three dimensional glass wall portion. The smaller cross-sectional shape or sections thereof are then tempered to provide a strengthened glass wall portion having a compressively stressed surface layer thereon.
    Type: Application
    Filed: October 3, 2011
    Publication date: October 3, 2013
    Inventors: Jaymin Amin, David John McEnroe, Wendell P. Weeks
  • Publication number: 20130176484
    Abstract: Apparatus, systems and methods for windows integration with cover glass and for processing cover glass to provide windows for electronic devices are disclosed. Transparent windows such as a transparent camera window, a transparent illuminator window and/or a transparent display window can be integrated into the cover glass. The apparatus, systems and methods are especially suitable for cover glasses, or displays (e.g., LCD displays), assembled in small form factor electronic devices such as handheld electronic devices (e.g., mobile phones, media players, personal digital assistants, remote controls, etc.). The apparatus, systems and methods can also be used for cover glasses or displays for other relatively larger form factor electronic devices (e.g., portable computers, tablet computers, displays, monitors, televisions, etc.).
    Type: Application
    Filed: June 8, 2012
    Publication date: July 11, 2013
    Inventors: Michael K. Pilliod, Peter N. Russell-Clarke, Douglas J. Weber
  • Patent number: 8402786
    Abstract: A process for producing a synthetic silica glass optical component which contains at least 1×1017 molecules/cm3 and has an OH concentration of at most 200 ppm and substantially no reduction type defects, by treating a synthetic silica glass having a hydrogen molecule content of less than 1×1017 molecules/cm3 at a temperature of from 300 to 600° C. in a hydrogen gas-containing atmosphere at a pressure of from 2 to 30 atms.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: March 26, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Yoshiaki Ikuta, Shinya Kikugawa, Akio Masui, Noriaki Shimodaira, Shuhei Yoshizawa
  • Publication number: 20130017366
    Abstract: The present invention is aimed to provide a method for producing a glass substrate with a thickness of not more than 200 ?m, which is satisfied with the quality required for a substrate on which a thin-film electric circuit is formed, and a sheet glass substrate obtained according to this method. The present invention is concerned with a method for producing a glass substrate having a sheet thickness of from 10 to 200 ?m, including a forming step of forming a molten glass into a ribbon shape in accordance with a down draw method, an annealing step of annealing the glass ribbon, and a cutting step of cutting the glass ribbon to give a glass substrate, wherein an average cooling rate in a temperature range of from the (annealing point+200° C.) to the (annealing point+50° C.) is controlled to the range of from 300 to 2,500° C./min.
    Type: Application
    Filed: March 22, 2011
    Publication date: January 17, 2013
    Applicant: Nippon Electric Glass Co., Ltd.
    Inventors: Takahiro Kawaguchi, Katsutoshi Fujiwara, Yoshinari Kato, Hisatoshi Aiba
  • Publication number: 20120324952
    Abstract: A glass composition for a tubular glass body used to form a glass-metal joint in a tubular solar collector. Includes a borosilicate glass having a dilatometric chart with a hard segment and a soft- segment hysteresis. The soft segment glass transition temperature is less than the hard-segment glass transition temperature for a temperature difference ?T higher than 20° C. The composition comprises: 5% to 8% Na2O, O, 1% to 3% K20, O, 1% to 1.5% CaO, 5% to 7.5% Al203, 70% to 75% Si02, 11.6% to 13.7% B203, Owing and owing to the choice of the B203 in the range indicated, in combination with the other components, there is a glass transition temperature lower than other borosilicate glasses. The remarkable difference between the soft and hard segments glass transition temperatures make it possible to obtain a tubular glass body particularly suitable for a solar collector.
    Type: Application
    Filed: December 24, 2010
    Publication date: December 27, 2012
    Applicant: GERRESHEIMER PISA S.P.A.
    Inventors: Lorenzo Paolo Dante Fiorentini, Marco Soldani, Oliver Bellina
  • Publication number: 20120324953
    Abstract: A method of making a vacuum insulating glass (VIG) unit. The method includes providing first and second substantially parallel spaced-apart glass substrates, a glass frit being provided at least partially between the first and second glass substrates for sealing said one or more edge portions to be sealed; and irradiating infrared energy towards the one or more edge portions to be sealed in forming an edge seal. The glass frit has a glass redox (FeO/Fe2O3) that is higher than a glass redox (FeO/Fe2O3) of the first and second substrates.
    Type: Application
    Filed: June 25, 2012
    Publication date: December 27, 2012
    Applicant: Guardian Industries Corp.
    Inventor: Yei-Ping (Mimi) H. WANG
  • Publication number: 20120131882
    Abstract: The present invention relates to a method for producing a laminated vacuum-tight connection between the glass pane and the frame, wherein said connection is formed by a thermal soldering material and can be produced directly by a soldering process, during which soldering material inserted between the frame and the glass pane is melted. For this purpose, during the manufacturing process, the glass pane receives the properties of a tempered safety glass pane (TSG) pursuant to DIN 12150-1.
    Type: Application
    Filed: May 26, 2009
    Publication date: May 31, 2012
    Inventors: Dieter Sporn, Werner Hartman, Rolf Ostertag, Jürgen Meinhardt, Manfred Krauss
  • Publication number: 20120006061
    Abstract: Disclosed is a method of manufacturing a glass substrate with through electrodes, the method including: a wire stretching process in which a plurality of conductive wires are stretched in parallel between upper and lower bases; a wire burying process in which a plurality of the wires between the bases are buried by glass; an ingot formation process in which a glass ingot having the buried wires is formed by cooling the glass; a slicing process in which a glass panel is formed by slicing the glass ingot; and a polishing process in which a plurality of the wires are exposed on front and rear surfaces of the glass panel to provide the through electrodes.
    Type: Application
    Filed: July 7, 2011
    Publication date: January 12, 2012
    Inventor: Eiji Terao
  • Publication number: 20120006060
    Abstract: A plurality of via-holes are formed in panel-shaped glass, and a plurality of via-holes are formed in two bases. Then, the panel-shaped glass is interposed between the two bases, positions of a plurality of the via-holes of the bases and a plurality of the via-holes of the panel-shaped glass are aligned, wires made of a conductive material are penetrated, and the wires between the two bases are stretched. Then, the panel-shaped glass is heated to a point higher than a softening point of the glass, the wires between the bases are buried by the glass, and the glass is cooled to form a glass ingot having the buried wires. Then, the ingot is sliced to form a glass substrate, the glass panel is polished to expose the wires on front and rear surfaces as the through electrodes.
    Type: Application
    Filed: July 7, 2011
    Publication date: January 12, 2012
    Inventor: Eiji Terao
  • Publication number: 20110200805
    Abstract: Provided is a method, including: performing heat treatment, under a state in which a thick core plate glass (2a) having a higher thermal expansion coefficient and a thin surface-layer plate glass (3a) having a lower thermal expansion coefficient are laminated together, so that the laminated portion has a temperature equal to or higher than the lower softening point out of the softening points of the core plate glass (2a) and the surface-layer plate glass (3a), thereby melt-bonding the core plate glass (2a) and the surface-layer plate glass (3a); and then performing cooling so as to attain a temperature less than the lower strain point out of strain points of the core plate glass (2a) and the surface-layer plate glass (3a), to thereby form a compression stress in a surface layer portion (3) corresponding to the surface-layer plate glass (3a) and form a tensile stress in a core portion (2) corresponding to the core plate glass (2a).
    Type: Application
    Filed: January 20, 2011
    Publication date: August 18, 2011
    Inventors: Masahiro TOMAMOTO, Tatsuya Takaya, Hiroshi Takimoto
  • Publication number: 20110200804
    Abstract: Provided is a method, including: performing heat treatment under a state in which a thick core plate glass (2a) having a higher thermal expansion coefficient and a thin surface-layer plate glass (3a) having a lower thermal expansion coefficient are brought into surface-to-surface contact so that a bonding surface (2x) and (3x) of the core plate glass (2a) and the surface-layer plate glass (3a) attain a close contact state, thereby directly bonding the core plate glass and the surface-layer plate glass (2a) and (3a); then, additionally performing heat treatment so that the surface-to-surface contact portion has a temperature equal to or higher than a lower strain point out of strain points of the core plate glass and the surface-layer plate glass; and then, performing cooling so as to attain a temperature lower than the lower strain point, to thereby form a compression stress in a surface layer portion (3) corresponding to the surface-layer plate glass (3a) and form a tensile stress in a core portion (2) corre
    Type: Application
    Filed: January 20, 2011
    Publication date: August 18, 2011
    Inventors: Masahiro TOMAMOTO, Tatsuya Takaya, Hiroshi Takimoto
  • Publication number: 20100162759
    Abstract: A fused silica glass article having a low absolute refractive index and low concentrations of hydroxyl groups, halogens, and metal having a low absolute refractive index. The glass article contains less than about 10 ppm protium-containing and deuterium-containing hydroxyl groups by weight and less than about 20 ppm halogens by weight. The silica glass article also has an absolute refractive index (ARI) less than or equal to 1.560820. In one embodiment, the ARI of the fused silica article is achieved by lowering the fictive temperature of the fused silica. A method of lowering the fictive temperature is also described.
    Type: Application
    Filed: December 22, 2009
    Publication date: July 1, 2010
    Inventors: Carlos Duran, Richard Michael Fiacco, Kenneth Edward Hrdina, Daniel Raymond Sempolinski
  • Patent number: 7726154
    Abstract: Disclosed is a method for producing single microlenses or an arrays of microlenses composed of a glass-type material, in which method a first substrate is provided with a surface containing impressions over which a second substrate composed of a glass-type material is placed at least partially overlapping it and is joined therewith under vacuum conditions. The substrate composite is tempered in such a manner that the second substrate softens and flows into the impressions of the first substrate, thereby structuring the side of the second substrate facing away from the first substrate in order to form at least one microlens surface.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: June 1, 2010
    Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung E.V.
    Inventors: Hans Joachim Quenzer, Peter Merz, Uwe Bott
  • Patent number: 7716950
    Abstract: Disclosed is a method for producing single microlenses or an arrays of microlenses composed of a glass-type material, in which method a first substrate is provided with a surface containing impressions over which a second substrate composed of a glass-type material is placed at least partially overlapping it and is joined therewith under vacuum conditions. The substrate composite is tempered in such a manner that the second substrate softens and flows into the impressions of the first substrate, thereby structuring the side of the second substrate facing away from the first substrate in order to form at least one microlens surface.
    Type: Grant
    Filed: March 22, 2004
    Date of Patent: May 18, 2010
    Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung E.V.
    Inventors: Hans Joachim Quenzer, Peter Merz, Uwe Bott
  • Publication number: 20090305020
    Abstract: A method for manufacturing a glass substrate by a fusion process includes flowing fused glass into a fusion pipe, and gradually cooling and solidifying the fused glass by allowing the glass to flow downward from the fusion pipe. An asperity is formed on a surface of the glass substrate by fastening and pressing the glass toward a direction of thickness of the glass with a pair of transfer rollers while the glass is flowing down from the fusion pipe.
    Type: Application
    Filed: August 13, 2009
    Publication date: December 10, 2009
    Applicant: NIKON CORPORATION
    Inventors: Yukiyasu Kimura, Yuhei Nitta
  • Publication number: 20090025424
    Abstract: Method of making an article, the method comprising coalescing a plurality of the glass particles. The article may comprise glass, glass-ceramic, and/or crystalline ceramic. Examples of articles include kitchenware (e.g., plates), dental brackets, and reinforcing fibers, cutting tool inserts, abrasives, and structural components of gas engines, (e.g., valves and bearings).
    Type: Application
    Filed: August 2, 2002
    Publication date: January 29, 2009
    Inventor: Anatoly Z. Rosenflanz
  • Patent number: 7081178
    Abstract: A method of constructing a glass panel which comprises two confronting edge sealed glass sheets, the method comprises the steps of providing a solder glass band around the margin of one surface of each glass sheet, forming, at a first temperature, an hermetic bond between the solder glass band and the associated surface of each glass sheet, positioning the glass sheets in spaced-apart confronting relationship, forming, at a second temperature which is lower than the first temperature, an hermetic seal between the two solder glass bands whilst maintaining the spaced apart relationship between the glass sheets.
    Type: Grant
    Filed: December 7, 2001
    Date of Patent: July 25, 2006
    Assignee: The University of Sydney
    Inventor: Richard Edward Collins
  • Patent number: 7069747
    Abstract: A method for constructing a mirror blank, including arranging hollow glass balls, on a front face sheet, and in close proximity to each other to permit fusing upon expansion; restricting the expansion of the hollow glass balls with a bounding structure during expansion of the hollow glass balls to force the hollow glass balls into a densely packed array of cells; applying heat to soften the hollow glass balls and increase the pressure within the hollow glass balls as the hollow glass balls fuse with each other during expansion, forming cells, wherein as a result of fusing, the hollow glass balls contact the front face sheet as a result of the increased pressure within the hollow glass balls; annealing and cooling the mirror blank to below annealing temperature associated with the hollow glass balls; and venting the cells.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: July 4, 2006
    Assignee: ITT Manufacturing Enterprises, Inc.
    Inventors: Steven M. DeSmitt, David N. Strafford, Joseph R. West
  • Publication number: 20040151848
    Abstract: A process for making a netted shell structure includes the steps of providing an elongated member made of a transparent heat-fusible material, and forming the elongated member into a plurality of ring sections which extend around an axis and which have a plurality of wavy speaks along the length of the ring sections. The ring sections are arranged in succession. The wavy peaks of each of the ring sections are welded to an adjacent one of the ring sections.
    Type: Application
    Filed: January 31, 2003
    Publication date: August 5, 2004
    Inventor: Cheng-Yuan Lin
  • Patent number: 6756330
    Abstract: A knitted fabric comprises fibers. At least part of these are metal fibers. The fabric has 90 or more stitches per square centimeter. The fabric is used as a separation cloth (12) between mould (11) and glass (14). The increased number of stitchers per square centimeter reduces the risks for markings on the glass.
    Type: Grant
    Filed: October 2, 2001
    Date of Patent: June 29, 2004
    Assignee: N.V. Bekaert S.A.
    Inventors: Guido Heirbaut, Wim Van Steenlandt
  • Patent number: 6701749
    Abstract: 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: Grant
    Filed: February 7, 2001
    Date of Patent: March 9, 2004
    Assignee: Guardian Industries Corp.
    Inventors: Yei-Ping H. Wang, Anthony V. Longobardo
  • Patent number: 6698242
    Abstract: In the method according to the invention cold or unheated hardened glass and/or glass-ceramic parts are bonded together with a metallic ductile joining material, preferably silver, copper, aluminum or an alloy of those metals, to form a brittle article. The parts to be joined in an initial unheated state are placed with the metallic ductile joining material between them in a high frequency alternating field with frequencies preferably from 100 to 500 kHz. Then the joining material is inductively heated locally to melt it by means of the alternating field and the parts are pressed together to form a sufficiently strong bond between the parts.
    Type: Grant
    Filed: February 15, 2000
    Date of Patent: March 2, 2004
    Assignee: Schott Glas
    Inventors: Wolfram Beier, Ulrike Beer, Roland Schnabel, Evelin Weiss, Stefan Hubert, Patrik Schober, Rainer Liebald
  • Publication number: 20020174686
    Abstract: A process for micromachining capillaries was having circular cross-sections in glass substrates. Microchannels are isotropically etched into a flat glass substrate, resulting in a semi-circular half-channel (or a rectangle with rounded corners). A second flat glass substrate is then fusion bonded to the first substrate, producing sealed microchannels with rounded bottom corners and a flat top surface having sharp corners. The process is completed by annealing at a sufficiently high temperature (approximately 750 C.) to allow surface tension forces and diffusional effects to lower the over-all energy of the microchannels by transforming the cross-section to a circular shape. The process can be used to form microchannels with circular cross-sections by etching channels into a glass substrate, then anodically bonding to a silicon wafer and annealing. The process will work with other materials such as polymers.
    Type: Application
    Filed: May 7, 2001
    Publication date: November 28, 2002
    Applicant: The Regents of the University of California
    Inventors: Peter Krulevitch, Julie K. Hamilton, Harold D. Ackler
  • Publication number: 20020035852
    Abstract: 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: Application
    Filed: February 7, 2001
    Publication date: March 28, 2002
    Inventors: Yei-Ping (Mimi) H. Wang, Anthony V. Longobardo
  • Publication number: 20010006092
    Abstract: A method for producing an electrochromic mirror comprises a step of obtaining an electrochromic mirror cell by laminating two electrically conductive substrates applied with a sealant on the peripheral edge of the conductive surface; a step of sealing the cell after injecting an electrolyte therein; and annealing the cell containing the electrolyte.
    Type: Application
    Filed: December 27, 2000
    Publication date: July 5, 2001
    Applicant: Nippon Mitsubishi Oil Corporation
    Inventors: Keizo Ikai, Masaaki Kobayashi, Tsuhoshi Asano, Yoshinori Nishikitani
  • Patent number: 6181469
    Abstract: In a method for evaluating the homogeneity of the refractive index of an optical member, the refractive index distribution of the optical member is measured, the measured refractive index distribution is separated into a rotationally symmetric element and a non-rotationally symmetric element in the optical axis direction before or after correction of the power element, and the rotationally symmetric element is further subjected to 2nd/4th-order element correction. Upon execution of such comprehensive evaluation, a photolithography optical member, which can realize a fine, sharp exposure-transfer pattern (e.g., a line width of 0.3 &mgr;m or less) is provided.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: January 30, 2001
    Assignee: Nikon Corporation
    Inventors: Hiroyuki Hiraiwa, Issey Tanaka, Katsuya Miyoshi
  • Patent number: 6112553
    Abstract: The invention relates to a method of making a device for stabilizing a Bragg grating relative to temperature, the device being of the type comprising two materials having coefficients of thermal expansion that are far apart, the method comprising the steps consisting in:supplying a glass and a metal suitable for fixing to each other by a chemical reaction between them in an appropriate range of temperatures; andputting the glass and the metal into contact with each other at a temperature lying in said appropriate temperature range so as to fix them together.
    Type: Grant
    Filed: December 15, 1998
    Date of Patent: September 5, 2000
    Assignee: France Telecom
    Inventors: Hubert Poignant, Valerie Fleury, Joel Le Mellot
  • Patent number: 6103344
    Abstract: A heat-fused unitary ferrule includes a first glass substrate and a second glass substrate. The first glass substrate and the second glass substrate are unitarily joined by heat-fusion. A method for producing a heat-fused unitary ferrule includes the steps of: bringing a surface to be heat-fused of the first glass substrate having a groove for fixing an optical fiber into contact with a surface to be heat-fused of the second glass substrate; and subjecting the first and second glass substrates to heat-fusion at a temperature ranging from (Tg1-100).degree. C. to (Tg2+150).degree. C. (Tg1 denotes the higher glass transition temperature, and Tg2 denotes the lower glass transition temperature of the first and second glass substrates).
    Type: Grant
    Filed: January 8, 1998
    Date of Patent: August 15, 2000
    Assignees: NGK Insulators, Ltd, NGK Optoceramics Co., Ltd
    Inventors: Takashi Ota, Masashi Fukuyama, Hitoshi Hasegawa, Kazutoshi Tohyama
  • Patent number: 6101844
    Abstract: A double wall reaction chamber assembly comprising a cylindrical inner wall and a cylindrical outer wall axially parallel thereto, the inner wall having an annular junction with a thickened annular junction flange on the outer surface thereof. The lower end of the outer wall being fused to the outer surface of the thickened annular junction. The outer surface of the inner wall and the inner surface of the annular junction flange define a sloping annular drainage channel to a downwardly sloping drainage port, enabling liquid to drain from the junction. The double wall reaction chamber assembly has a cylindrical inner wall and a cylindrical outer wall axially parallel thereto. It has a lower end fused to the inner wall. A gas distribution tube has a gas inlet end and a gas distributor end, the gas distributor end comprising a split tee having a junction.
    Type: Grant
    Filed: February 10, 1998
    Date of Patent: August 15, 2000
    Assignee: Silcon Valley Group Thermal
    Inventors: Jack D. Fowler, Robert Parvin, Jeffrey Kowalski, Patrick W. Wiesen
  • Patent number: 5979187
    Abstract: 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: Grant
    Filed: December 16, 1996
    Date of Patent: November 9, 1999
    Inventors: Martin Ross Churchley, Janusz Karol Lewandowski
  • Patent number: 5903097
    Abstract: 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: Grant
    Filed: December 29, 1997
    Date of Patent: May 11, 1999
    Assignee: Samsung Display Devices Co., Ltd.
    Inventor: Yong-kyu Lee
  • Patent number: 5827343
    Abstract: A method for the controlled bending of anodically bonded two-dimensional composites of glass and metal or semiconductor materials. The composite is heated after bonding, for up to 200 hours to a temperature of from 250.degree. C. to Tg-10 K. As a result of this heating, controlled compaction of the glass body and, hence, bending of the composite, are achieved to reduce or reverse any distortion that has occurred during bonding.
    Type: Grant
    Filed: October 6, 1997
    Date of Patent: October 27, 1998
    Inventors: Heinrich Engelke, Michael Harz
  • Patent number: 5582626
    Abstract: Methods of making gradient property refractive elements such as gradient index lens blanks. The spatial distributions of constituents achieved by subjecting various starting assemblages to various diffusion conditions are predicted. Each such predicted spatial distribution of constituents is converted to a spatial distribution of the graded property. The property distribution which best approximates a desired distribution is selected, to thereby select one starting assemblage and one set of diffusion conditions. That assemblage and set of conditions are used in fabrication of the element.
    Type: Grant
    Filed: January 10, 1995
    Date of Patent: December 10, 1996
    Assignee: Lightpath Technologies Limited Partnership
    Inventor: Richard Blankenbecler
  • Patent number: 5525137
    Abstract: A method for producing bas-relief stained glass comprises the steps of providing glass ground to a powder. The powdered glass is mixed with a vehicle to produce a paste which is applied to a sheet of glass. The applied layer of paste forms a design on the sheet of glass and has a raised appearance relative to the sheet of glass. The sheet of glass is heated for a period of time at a temperature high enough to bond the powdered glass paste to the sheet of glass, but low enough to prevent permanent deformation of the sheet of glass and to maintain the design formed by the paste on the sheet of glass.
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: June 11, 1996
    Assignee: Leonard DiCarlo
    Inventor: Leonard J. DiCarlo
  • Patent number: 5328493
    Abstract: Drawing, from a first installation, organic filaments in the form of one or more layers which converge toward a same point, and drawing, from a second installation, glass filaments which are joined together to form at least one strand. Guiding structure is provided to laterally introduce the glass strand into the area defined by the organic filaments before it is combined with the filaments at their point of convergence. A blowing device (48, 36) is also provided either outside or inside the area defined by the organic fibers.
    Type: Grant
    Filed: March 17, 1992
    Date of Patent: July 12, 1994
    Assignee: Vetrotex France
    Inventors: Giordano Roncato, Robert Fedorowsky, Philippe Boissonnat, Dominique Loubinoux
  • Patent number: 5328494
    Abstract: A process for producing a preform (44) includes pretreating roving by submerging it in a tank (18) and cooling the binder (20) on the glass fibers before the glass fibers are chopped. The fibers and solidified binder are then chopped and deposited onto a preform screen (32). Heat is applied to soften the binder that is on the chopped glass fibers and cooled to set the binder and form the preform on the screen.
    Type: Grant
    Filed: April 8, 1992
    Date of Patent: July 12, 1994
    Assignee: Davidson Textron Inc.
    Inventors: Josh Kelman, Robert Hames
  • Patent number: 5325450
    Abstract: An optical fiber coupler having a crosstalk characteristic of at least 18 dB. The optical fiber coupler includes a plurality of optical fibers. A length of glass in the optical fibers is exposed by removing the covering. The glass lengths are fused together and extended, during which time the fibers are twisted and subjected to a tension. The twisted fibers are then fixed to a protecting member while the tension is sustained.
    Type: Grant
    Filed: March 3, 1993
    Date of Patent: June 28, 1994
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Hiroshi Suganuma, Eisuke Sasaoka, Tomoyuki Hattori, Hiroaki Takimoto, Hiroshi Yokota
  • Patent number: 5309536
    Abstract: The first process for producing an optical fiber coupler includes a first step wherein at least one of the optical fibers to be used is stripped of the coating, a second step in which the bare portion of that optical fiber is heated for a predetermined time to diffuse the dopants, a third step wherein the other optical fibers which have not been heat-treated are stripped of their coating, a fourth step in which the bare portions of all the optical fibers are heated as they are brought into intimate contact, thereby forming a unitary portion, and a fifth step wherein the unitary portion is drawn via heating to form the coupling portion of an optical fiber coupler.
    Type: Grant
    Filed: June 17, 1992
    Date of Patent: May 3, 1994
    Assignees: Sumitomo Electric Industries, Ltd., Sumiden Opcom, Ltd.
    Inventors: Hiroshi Suganuma, Tomoyuki Hattori, Hiroaki Takimoto, Yoshiharu Okawa, Hiroshi Yokota, Kazuhiko Arimoto
  • Patent number: 5299274
    Abstract: An optical fiber fusion splicer apparatus (20) comprises a laser power source that produces a laser beam (32) having a laser beam axis (26). The laser power source includes a laser (22), a shutter (28) that controllably blocks and passes the laser beam, and an optical system (30) that expands the diameter of the laser beam. A parabolic mirror (34) has its axis coincident with the laser beam axis (26) and a bore (48) therethrough coincident with the laser beam axis (26). Optical fiber clamps (42, 46) hold the two optical fibers (40, 44) with their axes coincident with the laser beam axis (26) and their ends (62, 64) at the focal point (38) of the parabolic mirror (34). A sensor (82) measures the power reaching the optical fiber ends (62, 64) at the focal point (38) of the parabolic mirror (34), and a controller (72) controls the power level of the laser (22) responsive to the power measured by the sensor.
    Type: Grant
    Filed: June 25, 1992
    Date of Patent: March 29, 1994
    Assignee: Hughes Aircraft Company
    Inventors: Joseph A. Wysocki, Michael R. Vince, Stephen W. McCahon, John T. Kenna
  • Patent number: 5251277
    Abstract: An overclad fiber optic coupler of the type wherein a plurality of optical optical fibers, each having a core and a cladding, are fused together along a portion of the lengths thereof to form a coupling region. Surrounding the coupling region is a matrix glass body of refractive index n3 which is lower than the fiber cladding refractive index n.sub.2. The body has an inner region adjacent the optical fibers, an outer region having a radius greater than that of the inner region, and a transition region between the inner and outer regions. The softening point temperature of the inner region is greater than that of the outer region. The coupler exhibits both low polarization dependent loss and low excess loss.
    Type: Grant
    Filed: September 11, 1992
    Date of Patent: October 5, 1993
    Assignee: Corning Incorporated
    Inventor: Donald R. Young, Jr.
  • Patent number: 5249246
    Abstract: A self-contained unit and method for splicing together the ends of jacketed optical fibers. The unit comprises a guide to align fibers, such as a capillary tube, having opposite ends into which the ends of optical fibers to be spliced pass until they are in contact in a central portion of the guide. A heater high temperature proximal to the central portion of the guide, when activated, generates sufficient heat to fuse and splice together the contacting fiber ends. A securing means, such as spaced ferrules with a tube of ceramic material joining the ferrules, is mechanically associated with the guide to mechanically hold in position the optical fibers when spliced together. By bringing the ends of jacketed optical fibers into contact within the guide, in the vicinity of heater, and subjecting the ends to high temperature heating, the fibers are fused and spliced at their ends.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: September 28, 1993
    Inventor: Attila J. Szanto
  • Patent number: 5235662
    Abstract: The present invention provides a method of annealing optical glass layers, said method comprising the step of heating glass layers having an area greater than 0.01 cm.sup.2 to a temperature of between about 350 deg. C. and 1000 deg. C. in less than 10 minutes. The upper limit of the glass area that can be treated is limited only by the size of the quartz chamber. Current state-of-the-art chambers can accomodate glass areas of about 0.01 cm.sup.2 to about 324 cm.sup.2. According to another aspect of the invention, there is also provided an optical waveguide glass layer, treated according to the method of this invention, disposed on an integrated optical device.
    Type: Grant
    Filed: January 2, 1992
    Date of Patent: August 10, 1993
    Assignee: Eastman Kodak Company
    Inventors: Eric T. Prince, Sebastian F. Prospero, Mark M. Romach
  • Patent number: 5195151
    Abstract: Fiber optic couplers formed of at least two single mode optical fibers, at least one of which is an input fiber, are shown, the fibers constructed and arranged in the manner that coupling between the input fiber and the other fibers limits antisymmetric modal energy to substantially less than 50% of the input energy, the coupling region of said coupler being fused and drawn to an extended length sufficient to cause cutoff of the antisymmetric mode energy, whereby the coupler exhibits coupling ratio stability over an extended range of wavelengths and an excess loss of substantially less than 50%. Numerous fiber couplers of various construction, all employing cut-off of the antisymmetric mode to achieve wideband response or wavelength insensitivity are shown along with their method of manufacture.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: March 16, 1993
    Assignee: Aster Corporation
    Inventors: Daniel R. Campbell, Jr., David W. Stowe
  • Patent number: 5188553
    Abstract: A CRT bulb that has been preloaded to counter the atmospheric load placed on the seal area of an evacuated and sealed CRT is disclosed along with methods of constructing the bulb. The front panel is simply supported on the funnel and deflected inwardly during affixation of the panel to the funnel to form the bulb. When the deflection load is removed from the affixed panel, the resultant strain energy imparted to the bulb seal area offsets at least some of the atmosphericly induced strain on the sealed CRT. The bulb has a more evenly balanced stress distribution between the front panel and the funnel seal area than previous flat panel CRTs, enabling the use of thinner front panels and seal land.
    Type: Grant
    Filed: April 5, 1991
    Date of Patent: February 23, 1993
    Assignee: Zenith Electronics Corporation
    Inventor: Lawrence W. Dougherty