Of Glass Product Patents (Class 65/85)
  • Patent number: 10611898
    Abstract: Glass flakes according to the present invention include: glass flake substrates; and a coating covering at least a portion of a surface of each of the glass flake substrates and composed of a binder. The binder includes an epoxy-modified polyolefin resin and a silane coupling agent. The proportion of the coating in the glass flakes is 0.05 to 3 mass %.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: April 7, 2020
    Assignee: NIPPON SHEET GLASS COMPANY, LIMITED
    Inventors: Shinichi Kato, Nobuaki Tai
  • Publication number: 20150087105
    Abstract: Methods and apparatuses are provided for casting silicon for photovoltaic cells and other applications. With such methods and apparatuses, a cast body of geometrically ordered multi-crystalline silicon may be formed that is free or substantially free of radially-distributed impurities and defects and having at least two dimensions that are each at least about 10 cm is provided.
    Type: Application
    Filed: December 5, 2014
    Publication date: March 26, 2015
    Inventor: Nathan G. Stoddard
  • Patent number: 8728961
    Abstract: A method is described for making a float glass convertible into a glass ceramic, by which a largely crystal fault-free glass can be produced. In this method the glass is cooled from a temperature (TKGmax), at which a crystal growth rate is at a maximum value (KGmax), to another temperature (TUEG), at which practically no more crystal growth occurs, with a cooling rate, KR, in ° C. min?1 according to: KR UEG KGmax ? ? ? ? T UEG KGmax 100 · KG ? ? max , wherein ?T=TKGmax?TUEG, and KGmax=maximum crystal growth rate in ?m min?1. The float glass has a thickness below an equilibrium thickness, a net width of at least 1 m and has no more than 50 crystals with a size of more than 50 ?m, especially no crystals with a size of more than 10 ?m, per kilogram of glass within the net width.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: May 20, 2014
    Assignee: Schott AG
    Inventors: Gerhard Lautenschlaeger, Andreas Langsdorf, Ulrich Lange, Bernd Ruedinger, Klaus Schneider, Michael Jacquorie, Friedrich Siebers, Wolfgang Schmidbauer
  • Publication number: 20140013805
    Abstract: The method for producing a glass sheet by down-drawing includes an air pressure controlling step of controlling the air pressure of a furnace outside space formed between a furnace and a covering part that covers the furnace, the furnace including a forming furnace and a lehr, a melting step of melting glass raw materials to form molten glass, a supplying step of supplying the molten glass to a forming cell disposed inside the forming furnace, a forming step of forming a glass sheet by allowing the molten glass to flow down the forming cell, an annealing step of cooling the glass sheet while allowing the glass sheet to flow in one direction in the lehr, and a cutting step of cutting the glass sheet that has been cooled. In the air pressure controlling step, air pressure is controlled such that the air pressure is higher, inside the furnace outside space, at a position more toward the upstream side of the flow direction of the glass sheet.
    Type: Application
    Filed: March 27, 2012
    Publication date: January 16, 2014
    Applicants: AVANSTRATE KOREA INC., AVANSTRATE INC.
    Inventors: Hiroyuki Kariya, Kimihiko Nakashima
  • Publication number: 20130316194
    Abstract: To provide a method for manufacturing a glass blank for magnetic disk and a method for manufacturing a glass substrate for magnetic disk, which are capable of producing a glass blank for magnetic disk having a good surface waviness by press forming, and a method for manufacturing a glass substrate for magnetic disk. A method for manufacturing a glass blank for magnetic disk, which includes a forming process of press-forming a lump of molten glass using a pair of dies, wherein in the forming process, press forming is performed using thermally equalizing means for reducing a difference in temperature in the press forming surface of the die during pressing of the molten glass.
    Type: Application
    Filed: April 17, 2013
    Publication date: November 28, 2013
    Applicant: HOYA CORPORATION
    Inventors: Hideki ISONO, Hidekazu TANINO, Akira MURAKAMI, Takashi SATO, Masamune SATO
  • Publication number: 20130283859
    Abstract: An apparatus and method for removing volatilized chemical compounds from within enclosed or partially enclosed spaces containing molten glass. One or more condensing devices are positioned within the enclosure to produce preferential condensation of the vapor on condensing elements of the condensing devices, thereby facilitating easy removal of the condensates from the enclosure. The condensing elements may have a variety of shapes and sizes depending on the design of the enclosure.
    Type: Application
    Filed: June 27, 2013
    Publication date: October 31, 2013
    Inventors: Robert Delia, Ahdi El Kahlout, Anca Daniela Fountain
  • Publication number: 20130255314
    Abstract: A method of making glass through a glass ribbon forming process in which a glass ribbon is drawn from a root point to an exit point is provided. The method comprises the steps of: (I) cooling the glass ribbon at a first cooling rate from an initial temperature to a process start temperature, the initial temperature corresponding to a temperature at the root point; (II) cooling the glass ribbon at a second cooling rate from the process start temperature to a process end temperature; and (III) cooling the glass ribbon at a third cooling rate from the process end temperature to an exit temperature, the exit temperature corresponding to a temperature at the exit point, wherein an average of the second cooling rate is lower than an average of the first cooling rate and an average of the third cooling rate.
    Type: Application
    Filed: March 27, 2012
    Publication date: October 3, 2013
    Inventors: Douglas C. Allan, Bradley F. Bowden, Xiaoju Guo, John C. Mauro, Marcel Potuzak
  • Publication number: 20130239619
    Abstract: A solar concentrator includes a solid body of a transparent material, which comprises a light coupling-in surface and a light coupling-out surface. A supporting frame and a light-transmitting part are located between the light coupling-in surface and the light coupling-out surface.
    Type: Application
    Filed: November 11, 2011
    Publication date: September 19, 2013
    Applicant: DOCTER OPTICS SE
    Inventors: Wolfram Wintzer, Lars Arnold, Hagen Goldammer
  • Patent number: 8127569
    Abstract: An I.S. machine has a blow station where a parison is blown into a bottle. The parison is blown with a blow head at the “on” position on the blow mold and following the blowing of the parison, the blow head is lifted away from the blow mold. The spacing between the blow head and the mold is defined by a Pressure Profile which is responsive to the sensed pressure within the mold.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: March 6, 2012
    Assignee: Emhart Glass S.A.
    Inventor: Wolfgang Anheyer
  • Patent number: 8015842
    Abstract: A method for making a float glass convertible into a glass ceramic, by which a largely crystal fault-free glass can be produced. In this method the glass is cooled from a temperature (TKGmax), at which a crystal growth rate is at a maximum value (KGmax), to another temperature (TUEG), at which practically no more crystal growth occurs, with a cooling rate, KR, in ° C. min?1 according to: KR UEG KG max ? ? ? ? T UEG KG max 100 · KG max , wherein ?T=TKGmax?TUEG, and KGmax=maximum crystal growth rate in ?m min?1. The float glass has a thickness below an equilibrium thickness, a net width of at least 1 m and has no more than 50 crystals with a size of more than 50 ?m, especially no crystals with a size of more than 10 ?m, per kilogram of glass within the net width.
    Type: Grant
    Filed: July 13, 2006
    Date of Patent: September 13, 2011
    Assignee: Schott AG
    Inventors: Gerhard Lautenschlaeger, Andreas Langsdorf, Ulrich Lange, Bernd Ruedinger, Klaus Schneider, Michael Jacquorie, Friedrich Siebers, Wolfgang Schmidbauer
  • Patent number: 7963122
    Abstract: The invention relates to a method and an apparatus for producing optical glass elements, in particular optical prisms or optical rod lenses, using a drawing process. The geometry of the glass strand which is to be produced is controlled by means of cooling or heating elements positioned at least around portions of the periphery or longitudinal axis of the glass strand, inside or outside the heating apparatus.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: June 21, 2011
    Assignee: Schott AG
    Inventors: Frank Büellesfeld, Andreas Langsdorf, Ulrich Lange, Volker Plapper
  • 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: 20100126220
    Abstract: In one aspect, there is provided a process for manufacturing a lower mold for receiving a falling molten glass droplet, in which without narrowing the option for material for a lower mold, any occurrence of air retention can be favorably prevented and a lower mold excelling in durability can be obtained. The process comprises the film forming step of forming a coating layer on a base material and the surface roughening step of roughening the surface of the coating layer. Preferably, the coating layer contains at least one element selected from among chromium, aluminum and titanium.
    Type: Application
    Filed: July 22, 2008
    Publication date: May 27, 2010
    Inventors: Shunichi Hayamizu, Naoyuki Fukumoto
  • Publication number: 20090314034
    Abstract: The invention relates to a process for manufacturing a flat ribbon of precursor glass for a glass-ceramic, comprising the continuous floating of the molten glass on a bath of molten metal in a float chamber, said glass being poured in the molten state at a temperature above its devitrification onset temperature onto the molten metal upstream of the chamber, said glass progressively forming a ribbon that runs along said metal bath, the cooling rate of the glass being at least 18° C./min between, on the one hand, the moment when the glass is at the theoretical temperature for which the devitrification rate is a maximum and, on the other hand, the later moment when the glass is at the theoretical temperature at which the devitrification crystal growth rate becomes less than 1 micron per minute. The glass thus floated does not undergo any devitrification.
    Type: Application
    Filed: November 5, 2007
    Publication date: December 24, 2009
    Applicant: EUROKERA
    Inventors: Catherine Goulas, Rémi Jacques, Gilles Querel
  • Publication number: 20090205372
    Abstract: A large number of fine and deep holes are fanned in a glass substrate with high positional and dimensional accuracy. With a use of an etching of a photolithography technique, a large number of fine holes are formed in a silicon substrate. Hole forming pins are stood in the holes. The silicon substrate is held by a holding member of a hole forming apparatus. The glass substrate is housed in a container having an opened upper surface. The container is heated, and the glass substrate housed in the container is melted. The silicon substrate is lowered using the holding member, and the hole forming pins are inserted into the glass substrate. Thereafter, the container is cooled, and the glass substrate is solidified while having the hole forming pins inserted therein. The glass substrate is taken out from the container, the hole forming pins are dissolved in an aqua regia to thereby form the holes in the glass substrate.
    Type: Application
    Filed: July 12, 2006
    Publication date: August 20, 2009
    Applicant: TOYKO ELECTRON LIMITED
    Inventor: Kiyoshi Takekoshi
  • Publication number: 20090176641
    Abstract: An optical class comprising, by mass %, 12 to 30% of total of B2O3 and SiO2, 55 to 80% of total of La2O3, Gd2O3, Y2O3, ZrO2, Nb2O5 and WO3, 2 to 10% of ZrO2, 0 to 15% of Nb2O5, 0 to 15% of ZnO and 0% or more but less than 13% of Ta2O5, wherein the ratio of the content of Ta2O5 to the total content of La2O3, Gd2O3, Y2O3, Yb2O3, ZrO2, Nb2O5 and WO3 is 0.23 or less, the ratio of the total content of La2O3, Gd2O3, Y2O3 and Yb2O3 to the total content of B2O3 and SiO2 is from 2 to 4, the optical glass having a refractive index nd of 1.86 or more and an Abbe's number ?d of 38 or more, and a rod shaped glass shaped material and an optical element formed of the above optical glass each.
    Type: Application
    Filed: June 19, 2007
    Publication date: July 9, 2009
    Inventors: Yuta Kobayashi, Yoichi Hachitani, Yunoshin Kanayama
  • Publication number: 20090163344
    Abstract: The invention starts from a known component of quartz glass for use in semiconductor manufacture, which component at least in a near-surface region shows a co-doping of a first dopant and of a second oxidic dopant, said second dopant containing one or more rare-earth metals in a concentration of 0.1-3% by wt. each (based on the total mass of SiO2 and dopant). Starting from this, to provide a quartz glass component for use in semiconductor manufacture in an environment with etching action, which component is distinguished by both high purity and high resistance to dry etching and avoids known drawbacks caused by co-doping with aluminum oxide, it is suggested according to the invention that the first dopant should be nitrogen and that the mean content of metastable hydroxyl groups of the quartz glass is less than 30 wtppm.
    Type: Application
    Filed: September 4, 2007
    Publication date: June 25, 2009
    Applicants: Heraeus Quarzglas GmbH & Co., KG, Shin-Etsu Quartz Products Co., Ltd.
    Inventors: Juergen Weber, Tatsuhiro Sato, Ralf Schneider, Achim Hofmann, Christian Gebauer
  • Publication number: 20090137379
    Abstract: To provide a float glass for a display substrate, of which the high temperature viscosity is low, without impairing properties for a substrate glass for a display. A float glass for a display substrate, characterized in that its composition consists essentially of, as represented by mass % based on oxide, from 52 to 62% of SiO2, from 5 to 15% of Al2O3, from more than 0% to 9% of MgO, from 3 to 12% of CaO, from 9 to 18% of SrO, from 0 to 13% of BaO, from 25 to 30% of MgO+CaO+SrO+BaO, from 6 to 14% of Na2O+K2O+Li2O, from 0 to 6% of ZrO2 and from 0 to 1% of SO3, the temperature of glass melt corresponding to the viscosity of 102 dPa·s is at most 1,520° C., the temperature of glass melt corresponding to the viscosity of 104 dPa·s is at most 1,120° C., the glass transition temperature is at least 610° C., and the specific gravity is at most 2.9.
    Type: Application
    Filed: November 10, 2008
    Publication date: May 28, 2009
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Kensuke NAGAI, Tetsuya Nakashima, Kei Maeda
  • Publication number: 20090100873
    Abstract: Methods of drawing glass sheet via a downdraw process are provided. In certain aspects, the methods utilize rapid cooling below the root (70) of the forming apparatus (10). Such rapid cooling can, for example, facilitate the use of glass having a liquidus viscosity less than about 100,000 poise. In other aspects, the methods utilize slow cooling between the viscosities of 1011 poises and 1014 poises. Such slow cooling can facilitate the production of glass substrates which exhibit low levels of compaction. In further aspects, substrates are removed from the glass sheet at elevated temperatures which can facilitate increases in the production rates of downdraw machines. In still further aspects, rapid cooling below the root, slow cooling between the viscosities of 1011 poises and 1014 poises, and/or substrate removal at elevated temperatures are combined. Such combinations can facilitate economically effective utilization of downdraw equipment.
    Type: Application
    Filed: July 21, 2006
    Publication date: April 23, 2009
    Inventors: Douglas Clippinger Allan, Olus Naili Boratav, Andrey V. Filippov, Allan Mark Fredholm, Leonard R. Kent, Lewis Kirk Klingensmith, Terry Jay Ott, Randy Lee Rhoads
  • Publication number: 20090099002
    Abstract: The present invention relates to an optical glass having optical constants in the form of a refractive index nd of 1.70 or higher and an Abbé number nud of 50 or higher, a preform for precision press molding comprised of this glass, an optical element comprised of this glass, and methods for manufacturing the preform and the optical element.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 16, 2009
    Applicant: HOYA CORPORATION
    Inventor: Yasuhiro FUJIWARA
  • Publication number: 20080190140
    Abstract: A method for manufacturing anti-microbial glass particles where anti-microbial glasses or known substances for anti-microbial glasses are melted, broken or pulverized and put into an extruder in this form. In addition, heavy metals or other anti-microbial effective substances are put into the extruder, where they are melted or smelted and mixed with the anti-microbial glass and, after cooling, the additionally added heavy metals or other anti-microbial effective substances are present in the anti-microbial glass in crystalline or in the original condition, whereby they are enveloped and evenly distributed.
    Type: Application
    Filed: November 8, 2006
    Publication date: August 14, 2008
    Inventor: Harald Selig
  • Patent number: 7357839
    Abstract: The present invention provides an SOI wafer having at least an SOI layer, in which a plain orientation of the SOI layer is off-angled from {110} only in a direction to <100>, and an off-angle is from 5 minutes to 2 degrees, and a method of producing an SOI wafer comprising at least bonding a base wafer and a bond wafer consisting of a silicon single crystal, and forming an SOI layer by thinning the bond wafer, wherein the bond wafer is used where a plain orientation thereof is off-angled from {110} only in a direction to <100>, and an off-angle is from 5 minutes to 2 degrees. Thereby, there can be provided an SOI wafer having both high uniformity of film thickness and good micro-roughness to be suitable for fabricating high speed devices, and provided a method of producing the SOI wafer.
    Type: Grant
    Filed: May 7, 2004
    Date of Patent: April 15, 2008
    Assignee: Shin-Etsu Handotai Co., Ltd.
    Inventors: Kiyotaka Takano, Hitoshi Tsunoda
  • Publication number: 20080083249
    Abstract: It is an object of the present invention to provide a method for producing glass in which the temperature distribution between around a central portion and around a side wall of a shaping mold (temperature distribution between around a central portion and around a side wall of molten glass in the shaping mold) is regulated within a range of ±150° C. to produce large-size glass, and to provide a device for shaping glass used in the method for producing glass. The object may be attained by carrying out a step of flowing the molten glass in a melting furnace, through a pipe to which a heat-insulating member is fixed to prevent the heat dissipation of the molten glass, into the shaping mold covered with a low heat-conductive member, and a step of maintaining the distance between the lower portion of the heat-insulating member and the liquid surface of the molten glass.
    Type: Application
    Filed: August 24, 2007
    Publication date: April 10, 2008
    Inventors: Naoyuki Goto, Naoto Sato, Takayuki Kishi
  • Patent number: 6823694
    Abstract: A method for manufacturing a glass optical element having at least one concave surface, including: softening a glass molding material by heating, molding the softened material with a first mold having a first molding surface and a second mold having a second molding surface by applying a pressure, the first molding surface including a first concave forming surface, the second molding surface including a convex forming surface, a planar forming surface or a second concave forming surface, the second concave forming surface having a curvature radius greater than that of the first concave forming surface, whereby the applying of the pressure starts when the first mold and the second mold are at temperatures above a glass transition temperature of said glass molding material, the glass material is cooled so that a temperature of the glass material reaches a temperature equal to or lower than a glass transition temperature (Tg) of the glass material, and the cooled glass material is removed from either of the firs
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: November 30, 2004
    Assignee: Hoya Corporation
    Inventors: Hiroyuki Sawada, Yoshitaka Goto, Yuka Miyashita
  • Patent number: 6766661
    Abstract: Provided is a method for manufacturing a glass optical element comprising steps of: molding a glass material softened with a molding device which comprises an upper mold having a molding surface and a lower mold having a molding surface so that optically functional surfaces are formed on the glass material by applying a molding pressure, cooling the glass material so that the glass material obtains a predetermined viscosity, and removing the cooled glass material from the molding device, wherein a temperature of the glass material is maintained, in the cooling step, within a range of (Tg+30) to (Tg−50) degree centigrade at least for a predetermined time, and a secondary pressure is applied to the glass material at least during the predetermined time, so that the strain in the glass material is reduced, where Tg represents glass transition temperature of the glass.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: July 27, 2004
    Assignee: Hoya Corporation
    Inventors: Hiroyuki Sawada, Yoshitaka Goto
  • Patent number: 6701750
    Abstract: On molding a glass product by pressing a glass gob by the use of a mold composed of upper and lower dies each of which has a molding surface, a molten glass is supplied as the glass gob onto the molding surface of the lower die. Cooling is carried out for an upper surface of the glass gob supplied onto the molding surface of the lower die. After the cooling, heat radiation suppression is carried out to suppress heat radiation from the glass gob so that an inner part and an upper part of the glass gob are close in temperature to each other. Thereafter; the glass gob is pressed by the molding surfaces of the upper and the lower dies when the glass gob has a viscosity within a range between 103.5 and 106.5 poises (dPa·s). Preferably, the heat radiation suppression is carried out by making a heat shielding member lower in temperature than the inner part of the glass gob approach the upper part of the glass gob in a non-contact state.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: March 9, 2004
    Assignee: Hoya Corporation
    Inventors: Nobuhiro Maeda, Jun Saitou
  • Publication number: 20040007019
    Abstract: A method of forming a glass sheet includes obtaining a preform generated from a glass composition and conveying the preform through a channel having a temperature that decreases along a length of the channel to form a glass sheet having a predetermined width and thickness.
    Type: Application
    Filed: July 12, 2002
    Publication date: January 15, 2004
    Inventor: Jeffrey T. Kohli
  • Patent number: 6626010
    Abstract: A method of floating glass gobs by means of a gas flow. A method of manufacturing glass gobs by floating a molten glass gob and simultaneously cooling it. A method of manufacturing glass spheres by floating a softened glass gob and simultaneously rendering it spherical. These methods employ a device having a depression for floating and holding a glass gob or the like, with a gas flow being supplied along all or part of the inner surface of the depression from the opening side of the depression toward the bottom. A manufacturing method comprising the steps of adjusting a glass gob to a temperature suited to press molding while floating said glass gob by means of a gas flow injected along part or all of the depression-shaped forming surface of a lower mold from the opening side of the lower mold toward the bottom of the lower mold; and a step of press forming the glass gob.
    Type: Grant
    Filed: October 19, 2000
    Date of Patent: September 30, 2003
    Assignee: Hoya Corporation
    Inventor: Masahiro Yoshida
  • Patent number: 6401491
    Abstract: Apparatus for monitoring application of air through a dual-stage blowhead to blow mold a container includes a first solenoid valve for applying final blow air through the blowhead to a container in a mold and a second solenoid valve for applying finish cooling air through the blowhead around the finish of the container in the mold. Electronic circuitry is coupled to the first and second solenoid valves for detecting timing of application of first and second electrical valve control signals to the valves. Air pressure sensors are operatively coupled to the first and second solenoid valves for generating associated electrical signals indicative of timing of application of air by the first and second solenoid valves to the blowhead.
    Type: Grant
    Filed: April 19, 2000
    Date of Patent: June 11, 2002
    Assignee: Owens-Brockway Glass Container Inc.
    Inventor: Robert S. Wacke
  • Publication number: 20020059812
    Abstract: Provided is a method for manufacturing a glass optical element having at least one concave surface, comprising the following steps: softening a glass molding material by heating, molding the softened material with a first mold having a first molding surface and a second mold having a second molding surface by applying a pressure, the first molding surface comprising a first concave surface, the second molding surface comprising a convex surface, planar surface or second concave surface, the second concave surface having a curvature radius greater than that of said first concave surface, whereby shapes of the first molding surface and the second molding surface are transferred to the material, cooling the material so that a temperature of the material reaches a temperature equal to or lower than glass transition temperature (Tg), and removing the cooled material from either of said first mold or said second mold.
    Type: Application
    Filed: August 31, 2001
    Publication date: May 23, 2002
    Applicant: HOYA CORPORATION
    Inventors: Hiroyuki Sawada, Yoshitaka Goto, Yuka Miyashita
  • Publication number: 20020053222
    Abstract: Provided is a method for manufacturing a glass optical element comprising steps of: molding a glass material softened with a molding device which comprises an upper mold having a molding surface and a lower mold having a molding surface so that optically functional surfaces are formed on the glass material by applying a molding pressure, cooling the glass material so that the glass material obtains a predetermined viscosity, and removing the cooled glass material from the molding device, wherein a temperature of the glass material is maintained, in the cooling step, within a range of (Tg+30) to (Tg−50) degree centigrade at least for a predetermined time, and a secondary pressure is applied to the glass material at least during the predetermined time, so that the strain in the glass material is reduced, where Tg represents glass transition temperature of the glass.
    Type: Application
    Filed: August 31, 2001
    Publication date: May 9, 2002
    Applicant: HOYA CORPORATION
    Inventors: Hiroyuki Sawada, Yoshitaka Goto
  • Publication number: 20020046577
    Abstract: On molding a glass product by pressing a glass gob by the use of a mold composed of upper and lower dies each of which has a molding surface, a molten glass is supplied as the glass gob onto the molding surface of the lower die. Cooling is carried out for an upper surface of the glass gob supplied onto the molding surface of the lower die. After the cooling, heat radiation suppression is carried out to suppress heat radiation from the glass gob so that an inner part and an upper part of the glass gob are close in temperature to each other. Thereafter; the glass gob is pressed by the molding surfaces of the upper and the lower dies when the glass gob has a viscosity within a range between 103.5 and 106.5 poises (dPa·s). Preferably, the heat radiation suppression is carried out by making a heat shielding member lower in temperature than the inner part of the glass gob approach the upper part of the glass gob in a non-contact state.
    Type: Application
    Filed: August 31, 2001
    Publication date: April 25, 2002
    Applicant: HOYA CORPORATION
    Inventors: Nobuhiro Maeda, Jun Saitou
  • Patent number: 5958100
    Abstract: A process of making hermetically sealed glass semiconductor packages by injecting molding an electronic device within a body of molten thermoplastic glass which is solidified by cooling. The glass has a sealing temperature not over 350.degree. C. and a CTE not over 110.times.10.sup.-7 /.degree.C. and may be made of tin-phosphorus oxyfluoride or lead sealing glasses.
    Type: Grant
    Filed: July 31, 1996
    Date of Patent: September 28, 1999
    Assignee: Micron Technology, Inc.
    Inventors: Warren M. Farnworth, Alan G. Wood
  • Patent number: 5837026
    Abstract: Air is blowed before an annealing step to corner portions in an inner face portion of a glass panel which has been press-formed in a mold to cool that portions to be stronger than the other portion whereby a temperature difference between the corner portions and the other portion is reduced.
    Type: Grant
    Filed: December 8, 1997
    Date of Patent: November 17, 1998
    Assignee: Asahi Glass Company Ltd.
    Inventors: Tsunehiko Sugawara, Toshikazu Ikezawa, Naoya Shimizu, Hiroshi Yamasaki
  • Patent number: 5823011
    Abstract: In the press-molding method for producing molded glass bodies, the molding plug remains in contact with the molded glass body in the mold after the molding process until the regions close to the surface have cooled to a temperature at which the molded body at least temporarily possesses sufficient inherent stability to be removed from the mold. To prevent re-heating of the regions near the surface from causing undesirable deformation of the molded glass body, the body is transferred to a cooling station after being removed from the press mold. With this method, the waiting period during which the molded glass body is in the mold is minimized, so this mold is available for another molding process after a very short time. The capability of a glass-molding apparatus operated according to the method of the invention is thus increased.
    Type: Grant
    Filed: December 6, 1996
    Date of Patent: October 20, 1998
    Assignee: Poting GmbH & Co. KG
    Inventor: Klaus Poting
  • Patent number: 5779752
    Abstract: The present invention pertains to an apparatus for forming glass. The apparatus comprises a mold for holding molten glass. Additionally, the apparatus comprises a mechanism for applying pressure to the molten glass in the mold. The apparatus comprises a controller for controlling the applying mechanism such that pressure is applied to the glass at predetermined times. The present invention pertains to a method for forming glass. The method comprises the steps of placing molten glass in a mold. Preferably, the placing step includes the step of placing the molten glass at a temperature greater than 800.degree. C. into the mold. Next there is the step of applying pressure greater than ambient pressure to the molten glass in the mold. Before the applying step, there is preferably the step of cooling the molten glass to a predetermined temperature. The applying step preferably includes the step of applying the pressure until the pressure reaches a peak when the molten glass is cooled to a quench temperature T.sub.
    Type: Grant
    Filed: February 21, 1995
    Date of Patent: July 14, 1998
    Inventors: Leonid M. Landa, Ksenia A. Landa
  • Patent number: 5683482
    Abstract: A device for shaping rods, in particular, of a glassy material, by casting said material in a molten state in a mold, characterized by the fact that said mold comprises a) a cylindrical internal wall of a porous material and b) a means to inject a gas in this wall and cause it to come out of the wall on the side facing the glassy material accumulated in the mold, so as to constitute an interstitial flow of a film of gas that separates the glassy material from the inside wall of the mold.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: November 4, 1997
    Assignee: Corning Incorporated
    Inventor: Allan Mark Fredholm
  • Patent number: 5656051
    Abstract: The invention relates to a cooling method and a mold arrangement for the manufacture of glass articles or similar materials. The mold arrangement of this type includes a plurality of cooling passageways distributed independently and longitudinally around of the periphery of said mold, for the flow of a cooling fluid. A fluid distribution chamber coupled in coincidence with the cooling passageways, for the flow of the cooling flow, independently for each one of said passageway of the mold. A fluid regulating plate is coupled with the fluid distribution means, to regulate independently the flow of cooling in each one of the passageways of the mold, to regulate and control the cooling curve of said mold.
    Type: Grant
    Filed: September 5, 1996
    Date of Patent: August 12, 1997
    Assignee: Vidriera Monterrey, S.A.
    Inventor: Rafael Mares-Benavides
  • Patent number: 5626641
    Abstract: In manufacturing a glass material used for a re-heat press method of manufacturing high-precision optical glass components including a lens, prism or the like, a glass material can be manufactured which has no defect inside of or on the surface of the glass, and without requiring a process of grinding and polishing the glass. The glass material is manufactured by dropping melted glass from the glass outlet of a glass melting furnace to a mold and cooling the dropped glass on the mold. The distance between the mold and the glass outlet is in a range which maintains the temperature of the stretched area of dropping glass--the area where the melted glass dropped on the mold is spontaneously separated by its own weight and surface tension at its softening temperature or above. The temperature of the glass around the stretched area is at least its softening temperature, and the glass around that area is instantaneously incorporated into the glass on the mold after separation.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: May 6, 1997
    Assignees: Matsushita Electric Industrial Co., Ltd., Sumita Optical Glass Co., Ltd.
    Inventors: Tadayoshi Yonemoto, Yoshiyuki Shimizu, Takashi Inoue, Toshihiko Muroi
  • Patent number: 5601627
    Abstract: There is disclosed a method for molding an optical element, by preparing an upper mold member and a lower mold member for press molding a glass material, heating the mold members together or individually to a predetermined temperature, deforming the glass material according to molding faces of the mold members by a pressing force applied to the mold members, then transferring the mold members and the molded glass to a cooling step and subsequently taking out the molded glass by opening the mold members, thereby transferring the optically functional faces corresponding to the molding faces of the mold members, to the glass material.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: February 11, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masashi Mashige
  • Patent number: 5482526
    Abstract: The instant invention describes a method for preparing a stable, anhydrous non-hygroscopic zinc phosphate compound which is suitable for use as a batch material in the preparation of zinc-phosphate glasses. This method comprises three basic steps: first, forming an aqueous slurry mixture by intimately mixing a mixture containing phosphoric acid and a zinc-containing compound whereby the so-formed slurry mixture is comprised of a mixture of zinc hydrogen phosphates and exhibits a P.sub.2 O.sub.5 /ZnO weight ratio range between about 1.2 to 2.0; second, heating the so-formed slurry mixture to a temperature and for a time sufficient to achieve both a removal of a sufficient amount of water and the phase transformation of the zinc hydrogen phosphates resulting in zinc-phosphate material comprised of granular solid mixture of zinc metaphosphates and zinc pyrophosphate and third, cooling the zinc-phosphate material to room temperature.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: January 9, 1996
    Assignee: Corning Incorporated
    Inventors: Noshir B. Havewala, Kevin T. Morris, Robert D. Shoup
  • Patent number: 5322541
    Abstract: A method of producing a glass blank, comprising the steps of: supplying a desired weight of molten glass material to a bearer heated to a temperature of not more than a softening point of the glass material; performing and cancelling, at a temperature of not less than the softening point, pressing of the glass material supplied to the bearer so as to adjust a thickness of the glass material; and cooling the glass material to a temperature of not more than the softening point.
    Type: Grant
    Filed: March 26, 1992
    Date of Patent: June 21, 1994
    Assignees: Matsushita Electric Industrial Co., Ltd., Sumita Optical Glass, Inc.
    Inventors: Yoshiyuki Shimizu, Shoji Nakamura, Tadayoshi Yonemoto, Masaaki Sunohara, Tadao Shioyama, Noriyuki Kawata
  • Patent number: 5228894
    Abstract: A method for press-forming a glass preform includes the steps of applying positioning pressure to an upper mold as the temperature of the upper mold and a lower mold increase to set values, maintaining a first temperature difference between the upper and lower molds of at least 10.degree. C. and increasing the temperature of the glass preform to a value above its glass transition temperature. Additional steps include cooling the upper and lower molds at a rate of 30.degree. to 100.degree. C. per minute while maintaining a temperature difference between the upper and lower molds at at least the first temperature difference, applying pressure to the lower mold, and opening the upper and lower molds to release the formed optical element after the temperatures of the upper and lower molds decrease to below a set value and a temperature difference between the upper and lower molds becomes greater than the first temperature difference.
    Type: Grant
    Filed: June 22, 1992
    Date of Patent: July 20, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Bunryo Sato, Takeshi Nomura, Kiyoshi Yamamoto, Masaki Ohmori
  • Patent number: 5173100
    Abstract: A method of molding an optical element by pressing glass material uses a cavity composed of a pair of mold members and a side mold member. Either or both of the pair of mold members are rendered slidable along the axial direction of the optical element within the side mold member used during the pressurized molding operation, so that the pair of mold members move in close contact with the contracting glass along the axial direction in the side mold member, during the cooling subsequent to the pressurized molding due to adhesion between the contracting glass and either or both of the pair of mold members. The contraction of the glass during the cooling phase is limited by the adhesive force between the glass and the mold members when at least one of the pair of mold members traverses a gap and reaches a limit of travel; thus tension will be created in the glass.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: December 22, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Isamu Shigyo, Masaki Ohmori, Fumitaka Yoshimura
  • Patent number: 5151119
    Abstract: A method of forming glass containers, including the steps of drying a stream of air, passing the dried air into a vacuum-insulated mixing chamber, evaporating liquid cryogen in the mixing chamber, allowing the resulting cryogen vapor to mix with the air to form a mixture at a temperature below -20.degree. C., passing the gas mixture into a vacuum-insulated manifold, and causing the gas mixture to flow from the manifold and into the insides of glass containers being formed in molds to cool the containers.
    Type: Grant
    Filed: February 28, 1991
    Date of Patent: September 29, 1992
    Assignee: The BOC Group plc
    Inventors: Stephen Clements, Brian King
  • Patent number: 5147436
    Abstract: This invention contemplates a near net-shape method of making thin glass-ceramic articles possessing substantially uniform thickness and parallel opposing surfaces comprising the steps of: (a) heating the receiving and opposing molding surfaces of a mold to predetermined different temperatures; (b) bringing the receiving and opposing molding surfaces of the mold into close proximity to each other to press a delivered charge of molten glass to fill said mold, while thermally providing and maintaining a substantially parallel fit between the receiving and opposing surfaces of the mold, to achieve substantially uniform thickness in the pressed charge, (c) pressing the glass charge for a time sufficient to remove enough heat from the glass charge that the temperatures of the molding surfaces and the glass article surfaces are all nearly at equilibrium, wherein the press time and mold temperature differential combine to result in symmetric heat removal thereby causing all the aforementioned temperatures to reach e
    Type: Grant
    Filed: April 9, 1991
    Date of Patent: September 15, 1992
    Assignee: Corning Incorporated
    Inventors: William W. Blakeslee, deceased, Ronald A. Davidson, Edwin Q. Giles, Robert M. Menihan, David L. Naylor, Richard B. Pitbladdo, Martin J. Schad, Kevin B. Sterner, Jackson P. Trentelman, Jason S. Watts
  • Patent number: 5073182
    Abstract: A process for manufacturing glass objects such as bottles, in which a cold fluid containing a cryogen is sprayed around and/or under the bottles in the region of the transfer tongs and/or of the standby table in order to accelerate the cooling of the bottles and improve the quality of the latter and the productivity of the manufacturing machines. This cooling may be accompanied by a localized, or complete quenching of the bottle.
    Type: Grant
    Filed: March 5, 1990
    Date of Patent: December 17, 1991
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etudeet l'Exploitation des Procedes Georges Claude
    Inventors: Franck Virey, Daniel Goumy
  • Patent number: 4969944
    Abstract: The present invention is directed to a four-step process for molding glass articles of high precision and excellent surface figure. A glass preform having an overall geometry closely approximating that of the desired final product is placed into a mold, the mold and preform are brought to a temperature at which the glass exhibits a viscosity between 10.sup.8 -10.sup.12 poises, a load is applied to shape the glass into conformity with the mold, and thereafter the resulting glass article is removed from the mold at a temperature above the transformation range of the glass. The glass article is then annealed.
    Type: Grant
    Filed: December 4, 1989
    Date of Patent: November 13, 1990
    Assignee: Corning Incorporated
    Inventors: Jean-Pierre Marechal, Richard O. Maschmeyer
  • Patent number: 4906269
    Abstract: A glass object having protrusions and/or recesses, for example a glass lid (1) with a handle (2), is produced in an IS machine by pressing molten glass from above in a mould with the cover of the mould, in a mould defined by said cover, by a shaping mould (11) and by a mouth mould (13) disposed under the shaping mould. When the glass lid is formed its handle projects downwards and lies in the mouth mould. SUbsequently the glass lid is transferred together with the mouth mould to the finishing mould (12) and is at the same time returned into a position in which the handle projects upwards in the finishing mould in which it is cooled supported by the finishing mould.
    Type: Grant
    Filed: April 20, 1989
    Date of Patent: March 6, 1990
    Assignee: Riihimaen Lasi Oy
    Inventors: Esko Harkonen, Pekka Leppanen
  • Patent number: 4854958
    Abstract: The present invention is directed to a four-step process for molding glass articles of high precision and excellent surface figure. A glass preform having an overall geometry closely approximating that of the desired final product is placed into a mold, the mold and preform are brought to a temperature at which the glass exhibits a viscosity between 10.sup.8 -10.sup.12 poises, a load is applied to shape the glass into conformity with the mold, and thereafter the glass shape is removed from the mold at a temperature above the transformation range of the glass and annealed.
    Type: Grant
    Filed: December 11, 1987
    Date of Patent: August 8, 1989
    Assignee: Corning Glass Works
    Inventors: Jean-Pierre Marechal, Richard O. Maschmeyer