Sheet Patents (Class 65/90)
  • Publication number: 20090131241
    Abstract: Refractory materials are provided which contain P2O5/R2O3 constituents, where R is Y, Sc, Er, Lu, Yb, Tm, Ho, Dy, Tb, Gd, or a combination thereof, and/or V2O5/R?2O3 constituents where R? is Y, Sc, one or more rare earth elements, or a combination thereof. In certain embodiments, the refractory materials are xenotime-type materials and/or xenotime-stabilized zircon-type materials. The refractory materials can be used in the manufacture of glass and glass-ceramics. For example, the refractory materials, especially those that contain P2O5/R2O3 constituents, can be used as forming structures (“isopipes”) in the fusion process for making flat sheets of glass such as the glass sheets used as substrates in the manufacture of flat panel displays.
    Type: Application
    Filed: December 21, 2005
    Publication date: May 21, 2009
    Inventors: Hilary Tony Godard, Cameron Wayne Tanner, Michelle M. Wallen, Elizabeth Margaret Wheeler
  • Publication number: 20090107182
    Abstract: A pull roll apparatus and method are described herein that can control a cross-draw tension and a down-draw tension of a glass sheet while manufacturing the glass sheet. In one embodiment, the pull roll apparatus includes a first driven stub roll pair, a second driven stub roll pair and a control device (e.g., PLC) that controls the first and second driven stub roll pairs while a first edge portion of the glass sheet is drawn between two vertically downtilted rolls associated with the first driven stub roll pair and while an opposing second edge portion of the glass sheet is drawn between two vertically downtilted rolls associated with the second driven stub roll pair. If desired, the pull roll apparatus may include a pulling roll assembly (located below the first and second driven stub rolls) or another set of driven stub roll pairs (located below the first and second driven stub roll pairs).
    Type: Application
    Filed: October 29, 2007
    Publication date: April 30, 2009
    Inventors: James Gary Anderson, Lewis Kirk Klingensmith, George Clinton Shay, David John Ulrich
  • Publication number: 20090056788
    Abstract: The invention provides a solar concentrator structure including a first concentrating element. The first concentrating element includes a first aperture region, a first exit region, a first side and a second side. The solar concentrator structure further includes a second or more concentrating elements integrally coupled with the first concentrating element in a parallel manner. The second concentrating element includes a second aperture region, a second exit region, the third side, and a fourth side. The third side joins with the second side to form an apex notch structure characterized by a radius of curvature. Additionally, the solar concentrator structure includes a separation region by a width separating the first exit region from the second exit region and a triangular region including the apex notch structure and a base defined by the separation region and a refractive index of about 1 characterizing the triangular region.
    Type: Application
    Filed: August 28, 2008
    Publication date: March 5, 2009
    Applicant: SOLARIA CORPORATION
    Inventor: KEVIN R. GIBSON
  • Publication number: 20080282736
    Abstract: An apparatus for forming a glass sheet with reduced zircon inclusions in the glass sheet is disclosed. In one embodiment, the apparatus comprises heating elements distributed vertically between the weirs of a forming wedge and the root of the forming wedge, and wherein a thermal barrier is disposed between adjacent heating elements. A method of using the apparatus is also disclosed.
    Type: Application
    Filed: May 19, 2008
    Publication date: November 20, 2008
    Inventors: Andrey V. Filippov, Chunhong (Chelsie) C. He, Bulent Kocatulum, Kathleen Elizabeth Morse, Liming Wang
  • Publication number: 20080264104
    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: Application
    Filed: June 26, 2008
    Publication date: October 30, 2008
    Inventors: Olus Naili Boratav, Steven Roy Burdette, David John Ulrich
  • Patent number: 7430880
    Abstract: A pull roll assembly is described herein that is used to draw a glass sheet. The pull roll assembly includes a first roll assembly, a second roll assembly and a device (e.g., differential drive, sensor(s)). The device enables one to control the first and/or second roll assemblies based in part on pulling forces (e.g., glass contact normal force and/or required sheet pulling force) associated with a glass sheet while the glass sheet is being drawn between the first and second roll assemblies. A glass manufacturing system and method for using the pull roll assembly are also described herein.
    Type: Grant
    Filed: June 2, 2004
    Date of Patent: October 7, 2008
    Assignee: Corning Incorporated
    Inventors: Dennis I. Butts, Glen B. Cook, John J. Costello, III, Hilary T. Godard, John D. Helfinstine, Randy L. Rhoads, G. Clinton Shay
  • Publication number: 20080202164
    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: Application
    Filed: January 28, 2008
    Publication date: August 28, 2008
    Inventor: Steven F. Hoysan
  • Publication number: 20080202165
    Abstract: Methods for reducing stress on an isopipe during manufacture of a drawn glass sheet are disclosed including a method comprising providing an isopipe having a root, heating the isopipe to a predetermined temperature, maintaining the isopipe at the predetermined temperature for a period of time sufficient to relieve at least a portion of a tensile stress on the isopipe root, coupling the isopipe to a down-corner, and then providing glass to the isopipe. Also disclosed is a method comprising heating an isopipe such that the temperature difference between the weir and the root of the isopipe, after heating and prior to coupling, is less than about 100° C. A method comprising application of a compressive force to the ends of an isopipe root during heating is also disclosed.
    Type: Application
    Filed: February 8, 2008
    Publication date: August 28, 2008
    Inventors: Steven F. Hoysan, Steven Michael Milillo, William Robert Powell
  • Publication number: 20080190142
    Abstract: A glass-ceramic plate, a method of manufacturing a glass-ceramic plate, and hubs equipped with the glass-ceramic plate. A flat or substantially flat glass-ceramic plate includes a surface provided with pegs, the plate configured to equip a hob. At least one smooth region, free of pegs, is reserved in a location designed to come, in a mounted position, face to face with one or more elements of the hob, the blurred view of which due to the pegs must be improved.
    Type: Application
    Filed: April 14, 2008
    Publication date: August 14, 2008
    Applicant: EUROKERA S.N.C.
    Inventors: Pablo Vilato, Sergio Moreira, Franck Demol
  • Publication number: 20080184741
    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: Application
    Filed: October 4, 2007
    Publication date: August 7, 2008
    Inventors: Rudolf Mueller, Horst Loch, Dirk Sprenger, Jose Zimmer, Holger Wegener
  • Patent number: 7386999
    Abstract: A molten glass delivery system for use in producing sheet glass by a fusion process is provided. The delivery system includes a first conduit (9) which surrounds a portion of a second conduit (19) with a free surface (21) of molten glass (31) being formed between the two conduits. The first (9) and second (19) conduits are positioned with respect to one another so that the spatial relationship between the exit end (20) of the second conduit (19) and the free surface (21) results in neither substantial numbers of devitrification defects (27, 29) nor substantial numbers of blister defects (35) in finished sheets of devitrification sensitive glass, e.g., high silica LCD glass.
    Type: Grant
    Filed: December 12, 2002
    Date of Patent: June 17, 2008
    Assignee: Corning Incorporated
    Inventors: Philip M. Fenn, John T. Fisk, Randy L. Rhoads
  • Publication number: 20080131651
    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: Application
    Filed: November 30, 2006
    Publication date: June 5, 2008
    Inventors: Steven Roy Burdette, Longting He, Lewis Kirk Klingensmith, Liming Wang
  • Publication number: 20080110208
    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 fusion process) are also disclosed.
    Type: Application
    Filed: November 13, 2006
    Publication date: May 15, 2008
    Inventor: Adam James Gillmar Ellison
  • Publication number: 20080034798
    Abstract: The present invention provides an improved apparatus for forming sheet glass, wherein the apparatus includes a reservoir from which to provide molten glass, an inlet plate in fluid communication with the reservoir to receive the molten glass from the reservoir in a flow direction, the inlet pipe having a cross-sectional area orthogonal to the fluid direction, and a trough in fluid communication with the inlet pipe to receive the molten glass and that is operably coupled to a wedge-shaped sheet forming structure to form the molten glass into a glass sheet. The improvement comprises a bowl that provides fluid communication between the inlet pipe and the trough, the bowl having a cross-sectional area orthogonal to a fluid direction at the molten through the bowl that is equal to or less than the cross-sectional area of the inlet pipe, thereby preventing stagnation of the molten glass within the bowl.
    Type: Application
    Filed: August 8, 2006
    Publication date: February 14, 2008
    Inventors: Richard Bergman, Raymond Eugene Fraley, May Yammei Xun
  • Patent number: 7213414
    Abstract: The present invention relates to improvement in a method of supplying a glass ribbon in a molten state to be supplied from a glass melting furnace to a flat glass forming apparatus, which can further improve the smoothness of a flat glass after formed. A glass ribbon 13 supplied from a glass melting furnace 14 to a flat glass forming apparatus 15 is stretched between one pair of tension rollers 24A and 24B in an S-shape and the tension rollers 24A and 24B are rotated while applying a surface pressure to the glass ribbon 13 face via a thin layer of a steam film generated by vaporization of a steam film forming agent. By means of rotation of the tension rollers 24A and 24B, the face of the glass ribbon 13 still in a molten state is polished via the steam film 18.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: May 8, 2007
    Assignee: Asahi Glass Company, Limited
    Inventors: Yoshihiro Shiraishi, Motoichi Iga, Toru Kamihori
  • Patent number: 7071134
    Abstract: A high transmittance glass sheet is provided that is formed of a soda-lime-silica glass composition containing, expressed in wt. %, less than 0.020% of total iron oxide in terms of Fe2O3 and 0.006 to 2.0% of zinc oxide. The glass sheet allows the formation of nickel sulfide particles to be suppressed by the addition of a zinc compound to a glass raw material.
    Type: Grant
    Filed: February 5, 2004
    Date of Patent: July 4, 2006
    Assignee: Nippon Sheet Glass Company, Limited
    Inventors: Akihiro Koyama, Isamu Kuroda, Nobuyuki Yamamoto, Yasunori Seto
  • Patent number: 7026542
    Abstract: A transparent substrate for a cover for a solar battery and a method for producing the same are presented. Hemispherical concave portions are formed in a surface of light entering side of a cover glass almost over the entire surface wherein the ratio d/D of the depth d of the central portion of each concave portion to the radius D of the opening of the concave portion is from 0.10 to 0.50 and the proportion of area occupied by a flat portion where no concave portion is formed in the surface of light entering side is not more than 40%.
    Type: Grant
    Filed: March 22, 2004
    Date of Patent: April 11, 2006
    Assignee: Asahi Glass Company, Limited
    Inventors: Junichi Kageyama, Kazuo Sato, Mika Kambe
  • Patent number: 7007511
    Abstract: A device for supporting a ribbon of glass, having at least one roller arranged in an area of an underside of the ribbon of glass. In order to keep a ribbon of glass as free as possible of mechanical damage during production, at least one support device is assigned to the roller. With an actuating device the roller or the support device can selectively be contacted with the underside of the ribbon of glass, wherein the support device is in contact, at least in some areas, with the underside of the ribbon of glass by way of a gas cushion. The rollers are then employed at the start of production or after a ribbon of glass has snapped off in order to transmit an advancement force to the ribbon of glass.
    Type: Grant
    Filed: November 9, 2002
    Date of Patent: March 7, 2006
    Assignee: Schott AG
    Inventors: Gerhard Lautenschläger, Christian Kunert, Andreas Morstein
  • Patent number: 6903037
    Abstract: A high transmittance glass sheet is provided that is formed of a soda-lime-silica glass composition containing, expressed in wt. %, less than 0.020% of total iron oxide in terms of Fe2O3 and 0.006 to 2.0% of zinc oxide. The glass sheet allows the formation of nickel sulfide particles to be suppressed by the addition of a zinc compound to a glass raw material.
    Type: Grant
    Filed: February 5, 2004
    Date of Patent: June 7, 2005
    Assignee: Nippon Sheet Glass Company, Limited
    Inventors: Akihiro Koyama, Isamu Kuroda, Nobuyuki Yamamoto, Yasunori Seto
  • Patent number: 6851280
    Abstract: The present invention generally relates to a method of making halogen lamps and halogen lamp bulbs, as well as other analogous lamps and objects. The present invention also relates to apparatus used in a method of making halogen lamps and halogen lamp bulbs, as well as other analogous lamps and objects. The method minimizes contamination in the body of the glass and minimizes reaction of lamp halogen with the interior of a halogen lamp.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: February 8, 2005
    Assignee: Schott Glas
    Inventors: Franz Ott, Otmar Becker, Karin Naumann
  • Patent number: 6844280
    Abstract: The present invention is to provide a high transmittance glass sheet that has a composition containing as coloring components, expressed in wt. %, 0.005 to less than 0.02% of total iron oxide in terms of Fe2O3, less than 0.008% of FeO, and 0 to 0.25% of cerium oxide and having a ratio of FeO in terms of Fe2O3 to the total iron oxide of lower than 40%, and exhibits high visible light transmittance and solar radiation transmittance. Alternatively, a high transmittance glass sheet is provided that contains not more than 0.06% of total iron oxide and 0.025 to 0.20% of cerium oxide and has a ratio of a fluorescence intensity at 395 nm to a fluorescence intensity at 600 nm of 10% or higher when subjected to ultraviolet irradiation at a wavelength of 335 nm.
    Type: Grant
    Filed: March 6, 2001
    Date of Patent: January 18, 2005
    Assignee: Nippon Sheet Glass Company, Limited
    Inventors: Akihiro Koyama, Isamu Kuroda, Nobuyuki Yamamoto, Yasunori Seto
  • Patent number: 6815070
    Abstract: The invention relates to a glass-plastic composite film, especially for use in electronic components and devices, such as displays. The inventive film consists of a glass film which is between 10 &mgr;m and 500 &mgr;m thick, and is characterised in that a polymer layer with a thickness of between 1 &mgr;m and 200 &mgr;m f is applied directly to at least one of the side faces of said film and in that at least one side on the surface of the film has a waviness of less than 100 nm and a roughness RT<30 nm.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: November 9, 2004
    Assignee: Schott Spezialglas GmbH
    Inventors: Roland Bürkle, Silke Deutschbein, Reiner Mauch, Karl-Heinz Sossenheimer, Andreas Weber
  • Publication number: 20040177649
    Abstract: Methods of manufacturing glass sheets with manufacturing systems that including platinum-containing components are provided. The method includes providing a barrier coating to reduce the hydrogen permeability of the platinum-containing components which reduces the propensity for blistering of glass sheets made using the components.
    Type: Application
    Filed: March 13, 2003
    Publication date: September 16, 2004
    Applicant: CORNING INCORPORATED
    Inventors: William G. Dorfeld, David M. Lineman, Robert Morena, James P. Murphy, Randy D. Ziegenhagen
  • Publication number: 20040065115
    Abstract: The invention relates to a method for producing thin glass panes, especially glass panes with a thickness of below 1 mm, by drawing a thin glass strand vertically downwards. According to the inventive method, a glass melt is fed from a melting bath via a feed to the glass drawing tank that comprises a nozzle system with at least one slotted nozzle. The length and the diameter of the feed as well as the viscosity of the glass melt present in the feed determine the overall throughput. The throughput per length unit in the transverse direction to the glass strand (so-called line throughput) is adjusted via the geometry of the nozzle system and via the viscosity of the glass melt present in the nozzle system. These parameters are adjusted in such a manner that the glass, when leaving the nozzle system, does not wet the bottom of the slotted nozzle in the range of the tearoff edge.
    Type: Application
    Filed: November 14, 2003
    Publication date: April 8, 2004
    Inventors: Rudolf Mueller, Horst Loch, Dirk Sprenger, Jose Zimmer
  • Publication number: 20030121287
    Abstract: Methods are provided for controlling the formation of defects in sheet glass produced by a fusion process which employs a zircon isopipe. The methods comprise controlling the temperature profile of the glass as it passes over the isopipe so as to minimize both the amount of zirconia which diffuses into the glass at the top of the isopipe and the amount of zircon which comes out of solution at the bottom of the isopipe.
    Type: Application
    Filed: December 20, 2002
    Publication date: July 3, 2003
    Inventors: Paul G. Chalk, Philip M. Fenn, Dawne M. Moffatt-Fairbanks
  • Publication number: 20030125188
    Abstract: A high transmittance glass sheet is provided that is formed of a soda-lime-silica glass composition containing, expressed in wt. %, less than 0.020% of total iron oxide in terms of Fe2O3 and 0.006 to 2.0% of zinc oxide. The glass sheet allows the formation of nickel sulfide particles to be suppressed by the addition of a zinc compound to a glass raw material.
    Type: Application
    Filed: September 5, 2002
    Publication date: July 3, 2003
    Applicant: NIPPON SHEET GLASS CO., LTD.
    Inventors: Akihiro Koyama, Isamu Kuroda, Nobuyuki Yamamoto, Yasunori Seto
  • Publication number: 20030110804
    Abstract: A molten glass delivery system for use in producing sheet glass by a fusion process is provided. The delivery system includes a first conduit (9) which surrounds a portion of a second conduit (19) with a free surface (21) of molten glass (31) being formed between the two conduits. The first (9) and second (19) conduits are positioned with respect to one another so that the spatial relationship between the exit end (20) of the second conduit (19) and the free surface (21) results in neither substantial numbers of devitrification defects (27, 29) nor substantial numbers of blister defects (35) in finished sheets of devitrification sensitive glass, e.g., high silica LCD glass.
    Type: Application
    Filed: December 12, 2002
    Publication date: June 19, 2003
    Applicant: CORNING INCORPORATED
    Inventors: Philip M. Fenn, John T. Fisk, Randy L. Rhoads
  • Patent number: 6502423
    Abstract: A method and apparatus is described, with which individual rectangular glass panes of thickness between 0.03 mm and 2 mm can be cut from a glass band (2) drawn vertically from a hot forming device (1) in an in-line process with reduced rejects and reduced waste. The method provides that the glass band (2) drawn vertically downward through a vertical zone is cooled below a lower cooling point of the glass and subsequently is deflected through a bending zone (3b) with a bending radius between 0.1 m and 4 m into a horizontal zone (3c) in which it is horizontally oriented. The vertical alignment of the glass band (2) in the vertical zone (3a) is continuously monitored. At least one cutting process is performed on the horizontally oriented glass band (2) in the horizontal zone (3c). The device (20) for monitoring the vertical alignment of the glass band (2) includes at least three sensors (22a, 22b, 22c; 22a′, 22b′, 22c′) that detect the glass edges These sensors can be mechanical rollers.
    Type: Grant
    Filed: April 26, 2000
    Date of Patent: January 7, 2003
    Assignee: Schott Glas
    Inventors: Heinrich Ostendarp, Andreas Berndt, Rolf Suennemann
  • Patent number: 6418754
    Abstract: A method for heated mold changing at a forming station (24) is performed by apparatus (32) in a heated chamber (22) where heated glass sheets are cyclically formed. A switching station (318) is located adjacent the forming station (24). An unloading station (320) and a mold preheating station (322) are each located adjacent the switching station. An unloading cart (324) is initially movable from the loading station (320) to the switching station (318) and then to the forming station (24) to receive one or more heated molds from the forming station and is subsequently moved from the forming station back through the switching station to the unloading station to permit unloading of each heated mold. A loading cart supports a second mold or a pair of molds for heating within the mold preheating station (322) and is movable from the mold preheating station to the switching station (318) and then to the forming station for mold loading.
    Type: Grant
    Filed: November 16, 1999
    Date of Patent: July 16, 2002
    Assignee: Glasstech, Inc.
    Inventors: Dean M. Nitschke, Robert D. Caswall, Eustace Harold Mumford, David B. Nitschke
  • Patent number: 6415630
    Abstract: In a method for producing a streak-free quartz glass sheet with a highly homogeneous degree of refraction, a quartz glass rod is lowered into a melting pot parallel to a longitudinal axis of the quartz glass rod. A cross-section of the melting pot is larger than a cross-section of the quartz glass rod and determines a contour of the quartz glass sheet. The quartz glass rod is heated in the melting pot to a flow temperature whereupon the quartz glass rod is lowered until the quartz glass rod melts and a height of the quartz glass flowing in the melting pot reaches a desired quartz glass sheet thickness. The melting pot and the quartz glass rod move relative to each other in a direction which is perpendicular to the longitudinal axis of the quartz glass rod during the melting process. Preferably, the movement involves a rotational and a transverse movement.
    Type: Grant
    Filed: January 11, 2000
    Date of Patent: July 9, 2002
    Assignee: Schott Glas
    Inventors: Frank Coriand, Andreas Menzel, Walter Nadrag, Wolfgang Schmidt
  • Patent number: 6357263
    Abstract: In bending a glass sheet, the load applied to an intermediate glass sheet can be equalized to improve the quality of a final glass sheet. For this purpose, a forming ring 1 comprises a first forming frame 15 and a second forming frame 16, and the swingable center of each of swingable frames 19, 20, which forms right and left portions of a second forming frame 16, is located at an intermediate position apart from a separation position from each of fixed frames 17, 18. By such arrangement, the intermediate glass sheet can be equally supported when the swingable frames 19, 20 are moved along the intermediate glass sheet and the intermediate glass sheet is transferred from the first forming frame 15 onto the second forming frame 16.
    Type: Grant
    Filed: July 19, 1999
    Date of Patent: March 19, 2002
    Assignee: Asahi Glass Company Ltd.
    Inventors: Toshimi Yajima, Masahiro Tsuchiya, Hiroshi Yamakawa, Masahiko Kobayashi, Katsuki Saito
  • Patent number: 6311523
    Abstract: A process for forming a glass sheet, which is a process for continuously forming a glass sheet, and which comprises a step of introducing a vapor film-forming agent, which is not vapor at least around room temperature and which is vapor at a temperature above the glass transition point of the glass, into a support composed of a structure or a material capable of internally containing liquid, and a step of sliding the support and the glass of which temperature is above the glass transition point against each other via a thin layer of a vaporized vapor film-forming agent.
    Type: Grant
    Filed: January 10, 2000
    Date of Patent: November 6, 2001
    Assignee: Asahi Glass Company Ltd.
    Inventors: Gen Kojima, Tsutomu Koyama, Akira Takada, Masao Unoki, Kiyoshi Matsumoto
  • Patent number: 6216491
    Abstract: A method of producing a glass panel for a LCD device. The method comprises depositing on at least one surface of the panel a transparent film from an atmosphere of an atomized, or ionized, inert, refractory material, or reactive precursor, the film being 50-500 nm thick. The panel is subjected to a heat treatment to compact the glass, the deposited film preventing glass adherence during the compacting heat treatment.
    Type: Grant
    Filed: October 5, 1993
    Date of Patent: April 17, 2001
    Assignee: Corning Incorporated
    Inventor: Francis P. Fehlner
  • Patent number: 6128924
    Abstract: This invention is related to glasses for use as substrates in flat panel display devices, more specifically to a family of aluminosilicate glasses in which less than 0.2 mole percent and preferably no As.sub.2 O.sub.3 is used as a fining agent and the .beta.-OH of the glass is maintained below about 0.5.
    Type: Grant
    Filed: July 14, 1998
    Date of Patent: October 10, 2000
    Assignee: Corning Incorporated
    Inventors: James C. Bange, William G. Dorfeld, James C. Hayes, Josef C. Lapp
  • Patent number: 6101845
    Abstract: A process for forming a glass sheet, which is a process for continuously forming a glass sheet, and which comprises a step of introducing a vapor film-forming agent, which is not vapor at least around room temperature and which is vapor at a temperature above the glass transition point of the glass, into a support composed of a structure or a material capable of internally containing liquid, and a step of sliding the support and the glass of which temperature is above the glass transition point against each other via a thin layer of a vaporized vapor film-forming agent.
    Type: Grant
    Filed: August 31, 1998
    Date of Patent: August 15, 2000
    Assignee: Asahi Glass Company Ltd.
    Inventors: Gen Kojima, Tsutomu Koyama, Akira Takada, Masao Unoki, Kiyoshi Matsumoto
  • Patent number: 5824127
    Abstract: This invention is related to glasses for use as substrates in flat panel display devices, more specifically to a family of aluminosilicate glasses in which less than 0.2 mole percent and preferably no As.sub.2 O.sub.3 is used as a fining agent and the .beta.-OH of the glass is maintained below about 0.5 mm.
    Type: Grant
    Filed: October 28, 1996
    Date of Patent: October 20, 1998
    Assignee: Corning Incorporated
    Inventors: James C. Bange, William G. Dorfeld, James C. Hayes, Josef C. Lapp
  • Patent number: 5772715
    Abstract: A processing system (20,20') for processing sheet glass G includes a housing (22) and at least one slit seal (38i,38i',38e,38e') constructed to permit continuous passage of sheet glass in an efficient manner without fluttering. The slit seal functions as both an ingress slit seal (38i,38i') and as an egress slit seal (38e,38e'). Each slit seal has side seals (100, 102, 112, 114) and preferably has three stages of vacuum drawn by an associated first, second and third vacuum pumps (80,82,84). The sealing method for use in processing sheet glass has particular utility in connection with depositing semiconductor materials for photovoltaics and can be performed on either discrete glass sheets (28) or a continuous glass ribbon (30).
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: June 30, 1998
    Assignee: Solar Cells, Inc.
    Inventors: Harold A. McMaster, James B. Foote, Alan J. McMaster
  • Patent number: 5700305
    Abstract: A method of producing heatable mirrors comprising depositing onto a ribbon of hot glass during the production process a reflecting coating whereby the mirrors so formed have a visible light reflection of at least 70% and depositing an electroconductive heating layer onto the mirrors. There is also provided a heatable mirror comprising a glass substrate carrying a non-metallic reflecting coating whereby the mirror has a visible light reflection of at least 70% and an electroconductive heating layer deposited on the coated substrate.
    Type: Grant
    Filed: July 30, 1996
    Date of Patent: December 23, 1997
    Assignee: Pilkington Glass Limited
    Inventors: Martin Lowe, Timothy Jenkinson
  • Patent number: 5667547
    Abstract: A layer of quartz glass soot is deposited continuously on a substrate consisting of quartz glass grains with a lower degree of sintering activity than the quartz glass soot and the soot is sintered by passing it continuously through a heating zone to form a quartz glass strip which is severed to form plates. Apparatus for implementing the process includes a conveyor suitable for the transport of quartz glass grains; a loading device for the deposition of the quartz glass grains onto the conveyor; nozzles for depositing a layer of synthetic quartz glass soot on the quartz glass grains; and a heating unit to heat the layer.
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: September 16, 1997
    Assignee: Heraeus Quartzglas GmbH
    Inventors: Uwe Christiansen, Anton Steinkohl
  • Patent number: 5597394
    Abstract: A flat glass sheet is manufactured using the float process. Before annealing of glass carried on rollers, the glass is conveyed by a fluid bed formed by a mixture of gases, in order to cool the glass to approximately 600.degree. C. before it reaches an annealing lehr.
    Type: Grant
    Filed: November 28, 1994
    Date of Patent: January 28, 1997
    Assignee: Societ a Italiana Vetro - SIV - S.p.A.
    Inventors: Jean C. Marique, Pier P. Boattini
  • Patent number: 5342426
    Abstract: This invention is directed to a method for preparing glass sheet having surfaces which are essentially defect-free and equivalent in smoothness to polished glass surfaces which comprises the steps of: Two different batches of alkali-metal-free batches are melted and formed into a laminated sheet and the first glass is enclosed by the second glass. The second glass is 1000 times more soluble than the first glass. The laminate is contacted with an acid to dissolve the second glass wherein the first glass remains with essentially defect free surfaces.
    Type: Grant
    Filed: July 16, 1993
    Date of Patent: August 30, 1994
    Assignee: Corning Incorporated
    Inventor: William H. Dumbaugh, Jr.
  • Patent number: 5100449
    Abstract: Disclosed is a method and apparatus for drawing an elongated glass article such as a fiber optic device. The article is drawn upwardly from a source through the surface of a quantity of molten metal having a vertical temperature gradient. The source can be an elongated solid glass preform that is vertically positioned within the molten metal such that the temperature of that portion of the molten metal adjacent the upper end region is sufficiently high to heat that region to drawing temperature. The upper end region is pulled to form a tapered root, continued pulling resulting in the formation of an elongated article from the small diameter root end. The relative position of the root is maintained with respect to the surface of the molten metal during the drawing operation. Alternatively, the glass can be drawn from an orifice located within the molten metal.
    Type: Grant
    Filed: August 16, 1990
    Date of Patent: March 31, 1992
    Assignee: Corning Incorporated
    Inventors: Lauren K. Cornelius, Paul A. Tick
  • Patent number: 4917717
    Abstract: Apparatus for pyrolytically forming a metal compound coating on an upper face of a hot glass substrate 1 comprises conveyor means 2 for conveying the substrate 1 in a downstream direction 3. A coating chamber 6 opening downwardly onto the path 1 and means 7 for spraying coating precursor downwardly towards the substrate.The spraying means 7 is located to spray the coating precursor solution from a height above the substrate path 1 of at least 75 cm. Heating means are provided for supplying heat to the spraying zone 9. Means such as aspirator boxes 39 is provided for generating aspirating forces on atmospheric material within the passageway 13 to encourage such material to flow along the substrate path to the downstream end (27) of the passageway and to enter exhaust ducting leading such material away from the substrate path.
    Type: Grant
    Filed: November 14, 1986
    Date of Patent: April 17, 1990
    Assignee: Glaverbel
    Inventors: Jean-Francois Thomas, Robert Terneu, Albert Van Cauter, Robert Van Laethem
  • Patent number: 4906270
    Abstract: A method for drawing glass sheets of crystallization-sensitive glass such as borosilicate glass or glass ceramic. A melt in a vat of a glass furnace is supplied through a feed channel to a drawing chamber from which a glass sheet is drawn perpendicularly upwardly essentially across a full width of the drawing chamber. The melt in the drawing chamber is heated by at least two current-charged precious metal strips at each of the opposite sides of a drawing plane in a region of the surface of the sheet. This heating occurs in sections at each side of the drawing plans so that the melt is sectionally heated and crystallization at walls of the drawing chamber laying opposite one another at the vertical drawing plane is effectively prevented. In addition, the drawing chamber can be sectionally covered by slides.
    Type: Grant
    Filed: February 8, 1989
    Date of Patent: March 6, 1990
    Assignee: Schott Glaswerke
    Inventor: Franz Guenthner
  • Patent number: 4816053
    Abstract: The use of a flat faceplate comprised of self-polished float glass substantially reduces the cost of a cathode ray tube incorporating a flat tensioned shadow mask while affording a high degree of video image acuity. The float glass flat faceplate does not require polishing and acid etching to provide a high degree of smoothness in its inner and outer surfaces and, in combination with a flat tensioned shadow mask mounted to the flat faceplate, offers a low cost, easily manufactured and assembled color CRT front assembly.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: March 28, 1989
    Assignee: Zenith Electronics Corporation
    Inventors: Kazimir Palac, deceased, Judith A. Palac, heir, Donald T. Palac, heir, Susan M. Palac, heir
  • Patent number: 4801321
    Abstract: A method of manufacturing glass sheets from molten glass contained in a vertical drawing chamber includes the step of placing a stratified liquid layer on the mass of molten glass, the stratified liquid layer comprising at least two phases of densities different to each other, and vertically drawing a glass sheet from the glass mass through the stratified liquid layer.
    Type: Grant
    Filed: November 30, 1987
    Date of Patent: January 31, 1989
    Assignee: Vidrio Plano, S.A.
    Inventors: Antonio Pita, Guillermo Carro-de-la-Fuente, Saul-Roman Ruiz-Ontiveros
  • Patent number: 4656096
    Abstract: Molten glass 1 flows continuously from a glass melting furnace 2 to a drawing tank 7 whence the glass is drawn as a continuous ribbon 10 from a slot 11 in a refractory device 12 such as a debiteuse partially immersed in the molten glass.The center of the slot 11 is spaced from each of upstream 6 and downstream 9 end walls of the drawing tank 7 by at least 550 mm. The debiteuse 12 is preferably spaced from those walls by at least 350 mm.This promotes and facilitates production of a high yield of glass of a high standard of thickness uniformity and of good planeity.These advantages are enhanced when the ribbon is passed over a bending roll 13 in a drawing chamber 8 above the drawing tank 7 and thence to a horizontal annealing lehr 14.
    Type: Grant
    Filed: December 2, 1985
    Date of Patent: April 7, 1987
    Assignee: Glaverbel
    Inventor: Adrianus Geppaard
  • Patent number: 4636237
    Abstract: Molten glass 1 flows continuously from a glass melting furnace 2 to a drawing tank 7 when the glass is drawn as a continuous ribbon 10 and is passed over a bending roll 13 in a drawing chamber 8 above the tank 7 and then to a horizontal annealing lehr 14.A high yield of glass, especially thin glass, of a high standard of thickness uniformity and good planeity is promoted and facilitated by causing the molten glass 1 to flow upwardly through a slot 11 in a refractory device 12 partially immersed in molten glass in a deep drawing tank.
    Type: Grant
    Filed: April 19, 1985
    Date of Patent: January 13, 1987
    Assignee: Glaverbel
    Inventor: Adrianus Geppaard
  • Patent number: 4618538
    Abstract: A glass glazing is provided with a coating of a colored enamel composition along one or more edges. The enamel composition includes a vitreous matrix pigment and from 2 to 5% by weight of powdered tin dioxide which preferably is an additive during a comminution step. The vitreous matrix which represents at least 75% by weight of the enamel composition includes the following constituentsSiO: 25-33 (% by weight)PbO: 47-65B.sub.2 O.sub.3 : 3-7Na.sub.2 O: 1-4K.sub.2 O: 0-2Li.sub.2 O: 0-0.8ZnO: 0.2-0.5and provides a molar ratio of SiO.sub.2 to PbO between 1.6 and 2.7. The total content of the alkaline oxide are less than 5% by weight.The linear thermal expansion coefficient of the vitreous matrix is less than the glazing to be coated.
    Type: Grant
    Filed: September 12, 1985
    Date of Patent: October 21, 1986
    Assignee: Saint-Gobain Vitrage
    Inventors: Heinfried Emonts, Franz Gebhardt
  • Patent number: 4612023
    Abstract: A method of manufacturing practically stria-free, bubble-free, and homogeneous quartz-glass plates of any desired configuration and with a surface area that exceeds the cross-section of the full circular quartz-glass cylinder that is employed as a starting material. The cylinder is continuously lowered into a furnace shell flooded with an inert gas, in which it is heated to a flowing temperature in the range of 1700.degree. to 1900.degree. C. until some of the quartz-glass flows off into a graphite crucible. The crucible is preferably clad with zirconium-oxide.
    Type: Grant
    Filed: April 23, 1985
    Date of Patent: September 16, 1986
    Assignee: Heraeus Quarzschmelze GmbH
    Inventors: Karl Kreutzer, Fritz Simmat