Sheet Patents (Class 65/90)
  • Publication number: 20110209502
    Abstract: An apparatus for making a glass sheet includes a forming wedge with a pair of inclined forming surface portions converging along a downstream direction to form a root. The apparatus further includes an edge director intersecting with at least one of the pair of downwardly inclined forming surface portions, and a thermal shield configured to reduce heat loss from the edge director. Methods are also provided for reducing heat loss from the edge director with a thermal shield.
    Type: Application
    Filed: February 26, 2010
    Publication date: September 1, 2011
    Inventors: Ahdi El Kahlout, Soongyup Jason Lee, Shinya Sakamoto
  • Patent number: 8006517
    Abstract: The present invention discloses improved methods and apparatus for forming sheet glass. In one embodiment, the invention introduces a counteracting force to the stresses on the forming structure in a manner such that the thermal creep which inevitably occurs has a minimum impact on the glass flow characteristics of the forming structure.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: August 30, 2011
    Assignee: Corning Incorporated
    Inventor: Richard B. Pitbladdo
  • Patent number: 8001805
    Abstract: The present invention discloses improved apparatuses for forming sheet glass. In one embodiment, the invention introduces a structural web that supports the forming structure in a manner such that the thermal creep which inevitably occurs has a minimum impact on the glass flow characteristics of the forming structure.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: August 23, 2011
    Assignee: Corning Incorporated
    Inventor: Richard B. Pitbladdo
  • Publication number: 20110200812
    Abstract: Provided is a glass roll formed by winding a glass film into a roll, in which a minimum winding radius of the glass film is optimized. Thus, the glass film is reliably prevented from breaking due to static fatigue, and is able to be stored for long periods. A glass roll (1), which is formed by winding a glass film (2) into a roll, has a configuration in which the glass film has a minimum winding radius (R) satisfying the following relation: R?(T/2)[(2.3/?)×E?1], where ? represents flexural strength of the glass film (2) obtained by a 3-point bending test, T represents a thickness of the glass film, and E represents a Young's modulus of the glass film.
    Type: Application
    Filed: September 30, 2009
    Publication date: August 18, 2011
    Inventors: Masahiro Tomamoto, Michiharu Eta, Hidetaka Oda, Tatsuya Takaya, Yasuo Yamazaki, Hiroshi Takimoto, Shinichi Ishibashi, Keiji Takagi, Daisuke Nagata, Takahide Nakamura, Toru Sakurabayashi, Katsutoshi Fujiwara, Mitsuharu Noda, Yasuhiko Ogiso, Takahide Fujii
  • Patent number: 7984625
    Abstract: Methods of fabricating glass sheets (13) are provided in which the sheets are cut from a glass ribbon (15) composed of a glass having a setting zone temperature range (SZTR). As the glass is drawn, it passes through the SZTR (31) and an across-the-ribbon temperature distribution is produced at least one longitudinal position along the ribbon to compensate for in-plane stress induced in the sheets (13) when flattened. Through such thermal compensation, glass sheets (13) are produced which exhibit controlled levels of distortion when cut into sub-pieces and thus are suitable for use as substrates in the manufacture of, for example, flat panel displays, e.g., LCD displays.
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: July 26, 2011
    Assignee: Corning Incorporated
    Inventors: Shawn Rachelle Markham, Gautam Meda, Douglas Gregg Neilson, Daniel Arthur Nolet, Robert A Novak
  • Patent number: 7968482
    Abstract: Provided is a glass substrate, which has a substrate size of 1,100 mm×1,250 mm or more, and a transmittance at a wavelength of 500 to 800 nm and at a route length of 50 mm of 80% or more.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: June 28, 2011
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Hiroshi Komori, Shinkichi Miwa
  • Publication number: 20110143908
    Abstract: Provided is a glass composition suitable for a glass substrate for a flat panel display such as a liquid crystal display. This glass composition has high thermal stability, and is substantially free of BaO but has a low devitrification temperature. It is suitable for the production of a glass substrate by a downdraw process. This glass composition contains, in terms of mass %; 54 to 62% of SiO2; 4 to 11% of B2O3; 15 to 20% of Al2O3; 2 to 5% of MgO; 0 to 7% of CaO; 0 to 13.5% of SrO; 0 to 1% of K2O; 0 to 1% of SnO2; and 0 to 0.2% of Fe2O3, and is substantially free of BaO. In this glass composition, the total content of alkaline earth metal oxides (MgO+CaO+SrO) is 10 to 18.5 mass %. The devitrification temperature of the glass composition is 1200° C. or lower.
    Type: Application
    Filed: December 15, 2010
    Publication date: June 16, 2011
    Applicant: AVANSTRATE INC.
    Inventors: Akihiro KOYAMA, Mikiko HASHIMOTO
  • Patent number: 7958748
    Abstract: Disclosed is an isopipe for use in the manufacture of sheet glass by, and more specifically to an isopipe designed to control sag during use, as well as a method for reducing the sag of an isopipe used in a fusion process for molten glass. In one embodiment, the isopipe comprises a cavity that extends at least partially through the refractory body of the isopipe along its longitudinal length. The cavity has varying cross-sections configured such that, for at least a portion of the length of the isopipe, the load bending moment is greater than or generally equal to the gravity bending moment. In one embodiment, the neutral axis varies along the length of the cavity and has a similar profile to that of the gravity bending moment diagram.
    Type: Grant
    Filed: January 28, 2008
    Date of Patent: June 14, 2011
    Assignee: Corning Incorporated
    Inventor: Steven F Hoysan
  • Publication number: 20110135938
    Abstract: The object of the invention is a continuous method for obtaining glass, comprising steps consisting of: charging raw materials upstream of a furnace, along which a plurality of burners is disposed, obtaining a mass of molten glass, and then leading said mass of molten glass to a zone of the furnace situated further downstream, at least one burner disposed in the region of this zone being fed with an over-stoichiometric quantity of oxidant, and then, forming a glass sheet, said glass sheet having a chemical composition that comprises the following constituents in an amount varying within the weight limits defined below: SiO2 60-75%? Al2O3 0-10% B2O3 0-5%, preferably 0? CaO 5-15% MgO 0-10% Na2O 5-20% K2O 0-10% BaO 0-5%, preferably 0, SO3 0.1-0.4%? Fe2O3 (total iron) 0 to 0.015%,?? Redox 0.1-0.3.
    Type: Application
    Filed: September 1, 2009
    Publication date: June 9, 2011
    Applicant: Saint-Gobain Glass France
    Inventors: Byoung-Ouk Kim, Kidong Moon, Junbo Choi, Pedro Silva
  • Publication number: 20110126592
    Abstract: A chamber (101, 201), for holding molten glass (113, 202) having a free surface (114, 203), includes a bellows (4, 204), a sealing ring (10, 210), and a cover (30, 50, 230). The bellows is coupled to the chamber, and the sealing ring is coupled to the bellows. The sealing ring may include one or more various devices, associated with operation of the chamber, including: an atmosphere supply tube (14, 214), an electric lead (12), a pressure differential sensor (16, 216), a thermo couple, an oxygen sensor, and/or an auxiliary port (18). The sealing ring further includes an upper opening (21) having an inner diameter (22). The cover is removably coupled to the sealing ring and extends over the sealing-ring-upper-opening inner diameter, wherein the sealing ring is disposed between the cover and the chamber. The cover may include various separately removable sections (30, 32, 34, 35, 37, 50, 52, 54).
    Type: Application
    Filed: November 9, 2010
    Publication date: June 2, 2011
    Inventors: Gilbert De Angelis, Kevin Scott Riegel
  • Publication number: 20110123832
    Abstract: An aspect of the present invention relates to glass for a magnetic recording medium substrate, which comprises, denoted as molar percentages, 50 to 75 percent of SiO2, 0 to 5 percent of Al2O3, 0 to 3 percent of Li2O, 0 to 5 percent of ZnO, a total of Na2O and K2O of 3 to 15 percent, a total of MgO, CaO, SrO, and BaO of 14 to 35 percent, a total of ZrO2, TiO2, La2O3, Y2O3, Yb2O3, Ta2O5, Nb2O5, and HfO2 of 2 to 9 percent, with a molar ratio of {(MgO+CaO)/(MgO+CaO+SrO+BaO)} falling within a range of 0.85 to 1, and a molar ratio of {Al2O3/(MgO+CaO)} falling within a range of 0 to 0.30.
    Type: Application
    Filed: August 10, 2010
    Publication date: May 26, 2011
    Applicant: HOYA CORPORATION
    Inventors: Naomi Matsumoto, Yoichi HACHITANI, Kinobu OSAKABE
  • Publication number: 20110100056
    Abstract: An apparatus for drawing a glass ribbon including a shroud surrounding the glass ribbon and an edge roll that penetrates the shroud to contact the glass ribbon. The apparatus includes regulating a pressure within the seal assembly to be equal to or less than a pressure within the shroud and prevent ingress of relatively cooler outside gas into the hot interior of the shroud. The edge roll utilizes an air bearing to minimize friction that can produce periodic fluctuation of the ribbon as the edge roll is displaces in response to variations in the ribbon thickness or equipment dimensions.
    Type: Application
    Filed: October 29, 2009
    Publication date: May 5, 2011
    Inventors: James G. Anderson, L. Kirk Klingensmith, James P. Peris, David J. Ulrich
  • Publication number: 20110100057
    Abstract: An apparatus for drawing a glass ribbon including a forming body having an edge director attached thereto, and an edge roll assembly disposed below the edge director, the edge roll assembly comprising a contact member coupled to the edge roller shaft and a thermal shroud disposed about the shaft to reduce heat loss from the edge director. A method of drawing glass using the edge roll assembly is also described.
    Type: Application
    Filed: October 29, 2009
    Publication date: May 5, 2011
    Inventor: Keith R. Gaylo
  • Publication number: 20110086241
    Abstract: The provided are a glass for a magnetic recording medium substrate permitting the realization of a magnetic recording medium substrate affording good chemical durability and having an extremely flat surface, a magnetic recording medium substrate comprised of this glass, a magnetic recording medium equipped with this substrate, and methods of manufacturing the same. Glasses for a magnetic recording medium substrate are, glass I comprised of an oxide glass, comprising, denoted as mass percentages: Si 20 to 40 percent, Al 0.1 to 10 percent, Li 0.1 to 5 percent, Na 0.1 to 10 percent, K 0 to 5 percent (where the total content of Li, Na, and K is 15 percent or less), Sn 0.005 to 0.6 percent, and Ce 0 to 1.2 percent; the Sb content is 0 to 0.1 percent; and not comprising As or F; glass II comprised of oxide glass, comprising, as converted based on the oxide, denoted as molar percentages: SiO2 60 to 75 percent, Al2O3 1 to 15 percent, Li2O 0.1 to 20 percent, Na2O 0.
    Type: Application
    Filed: March 18, 2009
    Publication date: April 14, 2011
    Applicant: HOYA CORPORATION
    Inventors: Yoichi Hachitani, Kinobu Osakabe
  • Publication number: 20110079049
    Abstract: Glasses are disclosed which can be used to produce substrates for flat panel display devices, e.g., active matrix liquid crystal displays (AMLCDs). The glasses have MgO concentrations in the range from 1.0 mole percent to 3.0 mole percent and ?[RO]/[Al2O3] ratios greater than or equal to 1.00, where [Al2O3] is the mole percent of Al2O3 and ?[RO] equals the sum of the mole percents of MgO, CaO, SrO, and BaO. These compositional characteristics have been found to improve the melting properties of batch materials used to produce the glass, which, in turn, allows the glasses to be fined (refined) with more environmentally friendly fining agents, e.g., tin as opposed to arsenic and/or antimony.
    Type: Application
    Filed: December 10, 2010
    Publication date: April 7, 2011
    Inventor: Adam J.G. Ellison
  • Publication number: 20110048074
    Abstract: Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs). In accordance with certain of its aspects, the glasses possess good dimensional stability as a function of temperature.
    Type: Application
    Filed: November 10, 2010
    Publication date: March 3, 2011
    Inventors: Paul S. Danielson, Adam J.G. Ellison, Natesan Venkataraman
  • Patent number: 7895861
    Abstract: A conformable nosing device is described herein which conforms to have a bowed shape that substantially matches a bowed shape of a glass sheet and which engages the glass sheet to help minimize the motion of the glass sheet and to help reduce the stress within the glass sheet while the glass sheet is being scored and separated into individual glass sheets. In addition, the conformable nosing device can include a passive nosing device which can be controlled to further help minimize the motion of the glass sheet while the glass sheet is being scored and separated into individual glass sheets.
    Type: Grant
    Filed: May 9, 2007
    Date of Patent: March 1, 2011
    Assignee: Corning Incorporated
    Inventors: Paul Gregory Chalk, Chester Hann Huei Chang, Patrick Jean Pierre Herve, Keith Leonard House, Michael Yoshiya Nishimoto, Yawei Sun, Naiyue Zhou
  • Publication number: 20110028300
    Abstract: An optical glass comprising, by mol %, 0.1 to 40% of SiO2, 10 to 50% of B2O3, 0 to 10% of total of Li2O, Na2O and K2O, 0 to 10% of total of MgO, CaO, SrO and BaO, 0.5 to 22% of ZnO, 5 to 50% of La2O3, 0.1 to 25% of Gd2O3, 0.1 to 20% of Y2O3, 0 to 20% of Yb2O3, 0 to 25% of ZrO2, 0 to 25% of TiO2, 0 to 20% of Nb2O5, 0 to 10% of Ta2O5, over 0.1% but not more than 20% of WO3, 0 to less than 3% of GeO2, 0 to 10% of Bi2O3, and 0 to 10% of Al2O3, the mass ratio of the content of SiO2 to the content of B2O3, SiO2/B2O3, being 1 or less, the optical glass having a refractive index nd of 1.86 to 1.95 and an Abbe's number ?d of (2.36?nd)/0.014 or more but less than 38.
    Type: Application
    Filed: January 22, 2009
    Publication date: February 3, 2011
    Inventors: Xuelu Zou, Yunoshin Kanayama, Tomoaki Negishi
  • Publication number: 20110023547
    Abstract: A method of making sheet glass using a pulling roll comprised of a high-temperature millboard material. The millboard comprises aluminosilicate refractory fiber, silicate, mica, and kaolin clay. A method of manufacturing a pulling roll is disclosed, together with a roll produced by the methods disclosed herein. The method comprises forming a pulling roll and densifying at least a portion of the pulling roll by exposing to the pulling roll to high temperatures.
    Type: Application
    Filed: October 15, 2010
    Publication date: February 3, 2011
    Inventors: Dean Veral Neubauer, Maurice Lacasse
  • Publication number: 20110011133
    Abstract: A lens is disclosed for lighting purposes suited in particular as a lens for a poly-ellipsoid reflector headlamp for imaging the light emitted by a light source and reflected by a poly-ellipsoid reflector for the purpose of producing a predetermined lighting pattern. At least one of the two lens surfaces comprises areas having different optical scattering effects which areas are configured as zones that are transferred from a mold to the surface by a hot-pressing process.
    Type: Application
    Filed: September 23, 2010
    Publication date: January 20, 2011
    Inventors: Doris MOSELER, Polina Ebeling, Steffen Koerner, Ralf Bonitz, Frank Peters, Helmut Larm
  • Publication number: 20110003483
    Abstract: To provide a glass plate for display panels which has a low 8203 content and a low compaction and which can be used as a glass substrate for large TFT panels. A glass plate for display panels, which comprises, as a glass matrix composition as represented by mass% based on oxide: SiO2 50.0 to 73.0, Al2O3 6.0 to 20.0, B2O3 0 to 2.0, MgO 4.2 to 9.0, CaO 0 to 6.0, SrO 0 to 2.0, BaO 0 to 2.0, MgO+CaO+SrO+BaO 6.5 to 11.3, Li2O 0 to 2.0, Na2O 2.0 to 18.0, K2O 0 to 13.0, and Li2O +Na2O+K2O 8.0 to 18.0, and has a heat shrinkage (C) of at most 20 ppm.
    Type: Application
    Filed: September 16, 2010
    Publication date: January 6, 2011
    Applicant: Asahi Glass Company, Limited
    Inventors: Manabu NISHIZAWA, Yuya Shimada, Yuichi Kuroki, Kei Maeda
  • Publication number: 20100298112
    Abstract: A glass substrate for a display, which is formed of a glass having a light weight and having high refinability with decreasing environmental burdens, the glass comprising, by mass %, 50 to 70% of SiO2, 5 to 18% of B2O3, 10 to 25% of Al2O3, 0 to 10% of MgO, 0 to 20% of CaO, 0 to 20% of SrO, 0 to 10% of BaO, 5 to 20% of RO (in which R is at least one member selected from the group consisting of Mg, Ca, Sr and Ba), and over 0.20% but not more than 2.0% of R?2O (in which R? is at least one member selected from the group consisting of Li, Na and K), and containing, by mass %, 0.05 to 1.5% of oxide of metal that changes in valence number in a molten glass, and substantially containing none of As2O3, Sb2O3 and PbO.
    Type: Application
    Filed: June 15, 2010
    Publication date: November 25, 2010
    Applicants: AVANSTRATE INC., HOYA CORPORATION
    Inventors: Junji Kurachi, Akihiro Koyama, Yoichi Hachitani
  • Patent number: 7818980
    Abstract: Systems, methods, apparatus and products relate to display glass from curved glass ribbons, to improve shape stability in glass ribbons, to creation of reduced stress glass ribbons, and to creation of improved shape stability and reduced stress of display glass, which may include forming slightly a curved glass ribbon in a fusion draw machine (FDM). One or more embodiments may include an isopipe having a desired curvature; an isopipe having a desired incline; an offset draw device operable to draw the glass ribbon in an inclined ribbon draw direction; one or more air jets or vacuum operable to apply air pressure to a first side of the glass ribbon, thereby creating a pressure differential on the first side; and/or one or more electrostatic force generators operable to apply electrostatic force to a first side of the glass ribbon, thereby generating an electric field differential across the glass ribbon.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: October 26, 2010
    Assignee: Corning Incorporated
    Inventors: Steven Roy Burdette, Longting He, Lewis Kirk Klingensmith, Liming Wang
  • Publication number: 20100229601
    Abstract: In a process for producing a float plate glass having a plate thickness falling within a range from 0.1 mm to 2 mm, the process includes a step of draining a surface portion of a melted glass base material from an inside of a forming furnace or a glass-material melting furnace, in a region upstream from a location at which a width of glass ribbon is adjusted by top rolls.
    Type: Application
    Filed: October 27, 2008
    Publication date: September 16, 2010
    Inventors: Kishijirou Kishimoto, Shoji Furukawa, Akira Naka, Kenji Fujii
  • Publication number: 20100212359
    Abstract: A glass manufacturing system and method are described herein that use a forming apparatus (isopipe) made from or at least coated with a magnesium aluminate spinel material which is a chemically stable and compatible refractory material when used for forming an alkali-containing glass sheet.
    Type: Application
    Filed: February 23, 2009
    Publication date: August 26, 2010
    Inventors: Hilary Tony Godard, Mark E. Mack
  • Publication number: 20100212360
    Abstract: Apparatus and method for balancing the mass flow rate of molten glass flowing over a forming body to form a glass ribbon. The apparatus comprises upper and lower transition members that surround the glass ribbon as the glass ribbon is drawn from the forming body. The upper and lower transition members are independently moveable, and separated by a gap less than 8 cm across. The narrow gap minimizes disruption to the thermal environment contained within the upper and lower transition members, and is positioned a sufficient distance above the setting zone of the ribbon to minimize any influence on the dimensional consistency of the ribbon.
    Type: Application
    Filed: February 3, 2010
    Publication date: August 26, 2010
    Inventors: Robert Delia, Shawn R. Markham
  • Publication number: 20100173766
    Abstract: Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs). The glass compositions possess numerous properties that are compatible with the downdraw process, particularly fusion drawing.
    Type: Application
    Filed: March 16, 2010
    Publication date: July 8, 2010
    Inventors: Lauren Kay Cornelius, Adam James Ellison, Shari Elizabeth Koval
  • Patent number: 7748236
    Abstract: The present invention discloses improved apparatuses for forming sheet glass. In one embodiment, the invention introduces a structural web that supports the forming structure in a manner such that the thermal creep which inevitably occurs has a minimum impact on the glass flow characteristics of the forming structure.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: July 6, 2010
    Assignee: Corning Incorporated
    Inventor: Richard B. Pitbladdo
  • Publication number: 20100162763
    Abstract: The present invention discloses improved methods and apparatus for forming sheet glass. In one embodiment, the invention introduces a counteracting force to the stresses on the forming structure in a manner such that the thermal creep which inevitably occurs has a minimum impact on the glass flow characteristics of the forming structure.
    Type: Application
    Filed: January 29, 2010
    Publication date: July 1, 2010
    Inventor: Richard B. Pitbladdo
  • Patent number: 7735338
    Abstract: The method of making thin glass panes includes conveying a glass melt through a vertical inlet to a drawing tank with a slit nozzle; drawing a glass ribbon downward from the slit nozzle; setting a total throughput by setting length and cross section of the inlet and by heating and cooling the inlet to control glass melt viscosity so that pressure in the inlet decreases; and setting a throughput per unit of length in a lateral direction along the glass ribbon via nozzle system geometry and by heating and cooling of the drawing tank and slit nozzle to control melt viscosity, so that glass does not wet an underside of the slit nozzle near a breaking edge. The setting of the total throughput and the throughput per unit length are largely decoupled to simplify process control. An inventive apparatus for performing the method is also disclosed.
    Type: Grant
    Filed: October 4, 2007
    Date of Patent: June 15, 2010
    Assignee: Schott AG
    Inventors: Rudolf Mueller, Horst Loch, Dirk Sprenger, Jose Zimmer, Holger Wegener
  • Publication number: 20100137122
    Abstract: A glass composition for substrates excellent in productivity is provided by lowering the high temperature viscosity while securing characteristics and quality required for FPD substrates, particularly for PDP substrates. A glass composition for substrates, which is characterized by comprising, as represented by mass% based on oxides, from 55 to 75% of SiO2, from 5 to 15% of Al2O3, from 4 to 18% of MgO, from 3 to 12% of CaO, from 4 to 18% of SrO, from 0 to 20% of BaO, from 6 to 20% of Na2O+K2O, from 0.5 to 6% of ZrO2 and from 18 to 25% of MgO+CaO+SrO+BaO, as a glass matrix composition, and containing from 0.001 to 0.6% of SO3, and which is further characterized in that when the viscosity is represented by q, the temperature satisfying log?=2 is at most 1,545° C. and the devitrification temperature is at most the temperature satisfying log?=4, the thermal expansion coefficient is from 75×10?7 to 90×10?7/° C., the specific gravity is at most 2.8, and the glass transition point is at least 600° C.
    Type: Application
    Filed: February 4, 2010
    Publication date: June 3, 2010
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Kensuke Nagai, Tetsuya Nakashima, Kei Maeda
  • Publication number: 20100125034
    Abstract: A composition is disclosed comprising a fine zircon component having a median particle size of less than 5 ?m, a medium zircon component having a median particle size of from 5 ?m to 15 ?m, and a sintering aid, wherein the composition, after firing, has a strain rate of less than about 1×10?6/hr. A method for making a green body comprising contacting a fine zircon component having a median particle size of less than 5 ?m, a medium zircon component having a median particle size of from 5 ?m to 15 ?m, and a sintering aid, and then forming the mixture into a desired shape is disclosed.
    Type: Application
    Filed: January 22, 2010
    Publication date: May 20, 2010
    Inventors: William Peter Addiego, Christopher Raymond Glose
  • Publication number: 20100122556
    Abstract: A situation where glass chip produced as a result of breakage of waste glass sheets floats in a cutting chamber when the waste glass sheets produced in glass sheet producing steps are collected is suppressed. Provided is a glass sheet production installation (1), in which a sheetshaped glass ribbon (B) is formed by supplying molten glass (A) into a forming body (2) and causing the molten glass (A) to flow downward on a conveyance path extending in an upper and lower direction from the forming body (2), and the glass ribbon (B) is cut into a predetermined dimension in a cutting chamber (6) provided on the conveyance path so that glass substrates (C) are produced.
    Type: Application
    Filed: April 2, 2008
    Publication date: May 20, 2010
    Inventors: Shusei Kin, Hidetaka Oda, Masahiro Tomamoto
  • Patent number: 7700870
    Abstract: A high transmission and low iron glass is provided for use in a solar cell. The glass substrate may be patterned on at least one surface thereof. Antimony (Sb) is used in the glass to improve stability of the solar performance of the glass upon exposure to ultraviolet (UV) radiation and/or sunlight. The combination of low iron content, antimony, and/or the patterning of the glass substrate results in a substrate with high visible transmission and excellent light refracting characteristics.
    Type: Grant
    Filed: May 5, 2005
    Date of Patent: April 20, 2010
    Assignee: Guardian Industries Corp.
    Inventors: Scott V. Thomsen, Ksenia A. Landa, Richard Hulme, Anthony V. Longobardo, Leonid Landa, Anna Broughton
  • Patent number: 7696115
    Abstract: Isopipes for use in making sheet glass by a fusion process are provided which exhibit reduced sag. The isopipes are composed of a zircon refractory which has a mean creep rate (MCR) at 1180° C. and 250 psi and a 95 percent confidence band (CB) for said mean creep rate such that the CB to MCR ratio is less than 0.5, the MCR and the CB both being determined using a power law model. The zircon refractory can contain titania (TiO2) at a concentration greater than 0.2 wt % and less than 0.4 wt %. A concentration of titania in this range causes the zircon refractory to exhibit a lower mean creep rate than zircon refractories previously used to make isopipes. In addition, the variation in mean creep rate is also reduced which reduces the chances that the zircon refractory of a particular isopipe will have an abnormally high creep rate and thus exhibit unacceptable sag prematurely.
    Type: Grant
    Filed: June 1, 2009
    Date of Patent: April 13, 2010
    Assignee: Corning Incorporated
    Inventors: John D. Helfinstine, Daniel J. Liebner, John L. Martin, Dean V. Neubauer, William R. Powell
  • Patent number: 7685841
    Abstract: In the formation of sheet glass by the overflow downdraw process, the width of usable sheet glass is maximized by downwardly flowing edge portions of the sheet over web-like members and thereafter over extensions which intersect with and are downwardly inclined relative to the web-like members to thin edge portions of the glass flow and maintain sheet width. The extension members are preferably removably attached to the web-like members, greatly facilitating replacement of the more easily damaged extension members.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: March 30, 2010
    Assignee: Corning Incorporated
    Inventors: Olus Naili Boratav, Steven Roy Burdette, David John Ulrich
  • Patent number: 7685840
    Abstract: A method of minimizing distortion in a glass sheet manufacturing process wherein the stress in a parent sheet of glass is measured along each edge of the sheet. The stress data is then used to develop a distortion predictor for predicting the in-plane distortion which sub-sheets of the parent sheet are likely to exhibit when the parent sheet is cut into pre-determined sizes. The in-plane distortion may be predicted based on criteria established by the glass manufacturer, or supplied by an original equipment manufacturer (OEM).
    Type: Grant
    Filed: March 24, 2006
    Date of Patent: March 30, 2010
    Assignee: Corning Incorporated
    Inventors: Roger Alphee Allaire, Darren Ryan Courtright, Clive Darrell Gierbolini, Dean Veral Neubauer, Casey Allen Volino
  • Publication number: 20100071419
    Abstract: An apparatus 10 for producing a plate glass, comprising a bath 14 for float-forming for reserving a molten metal 16 for forming a band-shaped plate glass having a predetermined thickness by feeding a molten glass ribbon 20 in a predetermined direction on the molten metal 16, and a pair of partition walls 46 provided substantially above left and right edges 22 of the molten glass ribbon 20 and substantially along the edges 22 to partition a space above a bath surface of the molten metal into an upper space A above a region covered with the molten glass ribbon 20 and upper spaces B above regions not covered with the molten glass ribbon 20; wherein the partition walls 46 each has a vertically dividable structure dividable into an upper partition wall 46A and a lower partition wall 46B, and the lower partition wall 46B is constituted by strip-shaped lower strip members 58 provided continuously to each other in a lateral direction, and the strip members 58 are configured to be removable or openable from the upper
    Type: Application
    Filed: December 1, 2009
    Publication date: March 25, 2010
    Applicant: ASAHI GLASS COMPANY LIMITED
    Inventors: Nobuyuki Ban, Toru Kamihori, Atsushi Inoue, Motoichi Iga
  • Patent number: 7681414
    Abstract: The present invention discloses improved methods and apparatus for forming sheet glass. In one embodiment, the invention introduces a counteracting force to the stresses on the forming structure in a manner such that the thermal creep which inevitably occurs has a minimum impact on the glass flow characteristics of the forming structure.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: March 23, 2010
    Assignee: Corning Incorporated
    Inventor: Richard B. Pitbladdo
  • Publication number: 20100064729
    Abstract: Provide is a heat-resistant roll with improved effectively characteristics, a production method thereof, and a method of producing sheet glass using the heat-resistant roll. A method of producing a heat-resistant roll equipped with a roll portion containing 5% by weight or more of clay includes: a grinding step (S101) of grinding a roll surface of the roll portion; and a surface treatment step (S102) of performing surface treatment of smoothening the ground roll surface in a wet state.
    Type: Application
    Filed: September 10, 2009
    Publication date: March 18, 2010
    Applicant: NICHIAS CORPORATION
    Inventors: Masaaki Nakayama, Daiji Tahara, Kouji Iwata, Kazuhisa Watanabe
  • Publication number: 20090286091
    Abstract: A rare-earth-containing glass material having a composition, expressed in mole percentages on and oxide basis, comprising: SiO2: 66-75 Al2O3: 11-17 B2O3: 0-4 MgO: 1-6.5 CaO: 2-7 SrO: 0-4 BaO: 0-4 Y2O3: 0-4 La2O3: 0-4 Y2O3+La2O3: 0.1-4. The inclusion of Y2O3 and/or La2O3 in the composition reduces the T2.3 of the glass thereby allowing higher annealing-point glasses to be produced. The glass is particularly useful for low-temperature polycrystalline silicon-based semiconductor devices.
    Type: Application
    Filed: May 12, 2009
    Publication date: November 19, 2009
    Inventors: Paul Stephen Danielson, Matthew John Dejneka, Adam James Ellison, Timothy J. Kiczenski
  • Publication number: 20090242809
    Abstract: Provided is a radiation-shielding glass, including a glass composition in % by mass of 10 to 35% SiO2, 55 to 80% PbO, 0 to 10% B2O3, 0 to 10% Al2O3, 0 to 10% SrO, 0 to 10% BaO, 0 to 10% Na2O, and 0 to 10% K2O, in which the radiation-shielding glass has a total light transmission at a wavelength of 400 nm at a thickness of 10 mm of 50% or higher. Also provided is a radiation-shielding glass which has the similar glass composition and can be used for a gamma-ray shielding glass for a PET examination.
    Type: Application
    Filed: October 13, 2006
    Publication date: October 1, 2009
    Inventors: Ken Choju, Shinkichi Miwa
  • Publication number: 20090235693
    Abstract: Proposed is a manufacturing method to continuously fabricate plate glass which comprises supporting at least bottom surface of the traveling glass before stiffening by means of a gas generated from support members and controlling the gravitational effect on the glass to provide the partial displacement and deformation repeatedly while changing the position thereof so as to achieve propagation of overall glass extension. The proposed technology shows the possible way to solve or improve the drawbacks and restrictions of known technologies and provides convenient process which may significantly save energy and resource consumption alleviating environmental problems. The technology also realizes plate glass product of high-quality without surface defects and further makes clear the important technical perspectives and essential elements which the former technologies using water vapor thin film basically lack.
    Type: Application
    Filed: December 2, 2005
    Publication date: September 24, 2009
    Applicant: National Institute of Advanced Industrial Science and Technology
    Inventor: Gen Kojima
  • Publication number: 20090226671
    Abstract: A technical object of the present invention is to satisfy various properties required in glass for liquid crystal displays and the like, in particular, fusibility, devitrification resistance, and like properties, and then to design a glass composition in which components harmful to the environment are reduced or substantially not contained, thereby obtaining a glass substrate that takes the environment into consideration. An alkali-free glass of the present invention contains the following glass composition in percent by weight based on oxide: 50 to 70% of SiO2, 10 to 20% of Al2O3, 8 to 12% of B2O3, 0 to 3% of MgO, 4 to 15% of CaO, 0 to 10% of SrO, 0 to 1% of BaO, and 0 to 5% of ZnO, and substantially free of alkali metal oxide and As2O3.
    Type: Application
    Filed: May 22, 2007
    Publication date: September 10, 2009
    Inventors: Tomoki Yanase, Shinkichi Miwa
  • Publication number: 20090205373
    Abstract: High quality plate glass free from surface defects, and excellent in macro thickness uniformity, flatness, and the like is manufactured by minimizing the part to be wasted. To that end, glass melt 4 from a melting furnace 1 is supplied between a gas ejection/discharge rotary roll 5 and a gas ejection/discharge concave support 6. The gas ejection/discharge rotary roll 5 has a large number of gas ejection holes each including a flow path having fluid resistance (e.g., vortex flow resistance) in the inside for supplying compression air, and a large number of gas decompression discharge holes each including the same flow path. The gas ejection/discharge concave support 6 has a large number of gas ejection holes for supplying compression air, each including the same flow path, and gas ordinary pressure discharge holes each communicated with the ordinary pressure release space.
    Type: Application
    Filed: May 14, 2007
    Publication date: August 20, 2009
    Inventors: Gen Kojima, Hiroshi Yokoyama
  • Publication number: 20090186433
    Abstract: A method of making a light emitting device includes mixing a glass powder with a phosphor powder including at least one of a sulfide phosphor, an aluminate phosphor and a silicate phosphor to produce a mixed powder in which the phosphor powder is dispersed in the glass powder, heating and softening the mixed powder to provide an integrated material, and subsequently solidifying the integrated material to provide a phosphor-dispersed glass, and fusion-bonding the phosphor-dispersed glass onto a mounting portion on which a light emitting element is mounted by hot pressing, and simultaneously sealing the light emitting element with the phosphor-dispersed glass on the mounting portion.
    Type: Application
    Filed: December 22, 2008
    Publication date: July 23, 2009
    Applicants: TOYODA GOSEI CO., LTD., SUMITA OPTICAL GLASS, INC.
    Inventors: Seiji Yamaguchi, Takashi Nonogawa, Yoshinobu Suehiro, Hiroki Watanabe, Kazuya Aida
  • Publication number: 20090170684
    Abstract: The invention provides an alkali-free glass substrate small in the variation of the thermal shrinkage and a process for producing the same. An alkali-free glass substrate of the invention has an absolute value of a thermal shrinkage of 50 ppm or more when the alkali-free glass substrate is heated at a rate of 10° C./min from a room temperature, kept at a holding temperature of 450° C. for 10 hr and then cooled at a rate of 10° C./min.
    Type: Application
    Filed: December 15, 2006
    Publication date: July 2, 2009
    Applicant: NIPPON ELECTRIC GLASS CO., LTD.
    Inventors: Yoshinari Kato, Tatsuya Takaya
  • Publication number: 20090162545
    Abstract: A laminated sheet includes a surface layer having an optical surface that is of fire-polished quality and a core layer having a higher modulus than the surface layer to increase an overall stiffness or fracture toughness of the laminated sheet.
    Type: Application
    Filed: February 25, 2009
    Publication date: June 25, 2009
    Inventors: Peter L. Bocko, David Chen, Glen B. Cook, Frank T. Coppola, Victoria A. Edwards, Gunilla E. Gillberg, Josef C. Lapp, Randy L. Rhoads, David A. Tammaro, Butchi R. Vaddi
  • Publication number: 20090133441
    Abstract: Alkali-free glasses are disclosed which can be used to produce substrates for flat panel display devices, e.g., active matrix liquid crystal displays (AMLCDs). The glasses contain iron and tin as fining agents, and preferably are substantially free of arsenic and antimony. In certain embodiments, the glasses are also substantially free of barium. Methods for producing alkali-free glass sheets using a downdraw process (e.g., a fission process) are also disclosed.
    Type: Application
    Filed: December 1, 2008
    Publication date: May 28, 2009
    Inventor: Adam James Gillmar Ellison
  • Publication number: 20090126406
    Abstract: Since dispersion of height dimension is reduced in a spacer, it is possible to increase a yield in manufacturing processes and reduce a lord for inspecting products. There is provided a method of manufacturing a plate glass member to be used in an electronic device, the manufacturing method comprising: introducing a glass base material analogous to the glass member into a furnace body of which the temperature has been held equal to or higher than a softening temperature of the glass base material; heat-drawing the glass base material within the furnace body; and extracting the heat-drawn glass base material outside the furnace body, wherein the glass base material is introduced into the furnace body as a gap between the glass base material and an inner wall of the furnace body is shielded at a slot of the furnace body for the glass base material.
    Type: Application
    Filed: November 6, 2008
    Publication date: May 21, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Hideki Ishikawa