Glass Preform Treating Patents (Class 65/111)
  • Patent number: 10472270
    Abstract: A porous glass base material sintering method comprising measuring a feeding speed Vf of a porous glass base material and a movement speed Vw of a bottom end of the glass base material; performing a sintering treatment of the porous glass base material presetting, for each feeding distance L of the porous glass base material, a greater-than-1 target value ?S (L) of an elongation rate in a straight body portion of the porous glass base material calculated based on a ratio Vw/Vf, and controlling at least one of a temperature of the heating furnace and a feeding speed of the porous glass base material such that a measured value ? of the elongation rate of the porous glass base material matches with the target value ?S (L).
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: November 12, 2019
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventor: Tetsuya Otosaka
  • Patent number: 10329184
    Abstract: Annealing treatments for modified titania-silica glasses and the glasses produced by the annealing treatments. The annealing treatments include an isothermal hold that facilitates equalization of non-uniformities in fictive temperature caused by non-uniformities in modifier concentration in the glasses. The annealing treatments may also include heating the glass to a higher temperature following the isothermal hold and holding the glass at that temperature for several hours. Glasses produced by the annealing treatments exhibit high spatial uniformity of CTE, CTE slope, and fictive temperature, including in the presence of a spatially non-uniform concentration of modifier.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: June 25, 2019
    Assignee: Corning Incorporated
    Inventors: Sezhian Annamalai, Carlos Alberto Duran, Kenneth Edward Hrdina, William Rogers Rosch
  • Patent number: 9517969
    Abstract: The present invention provides an optical member having a high transmittance, wherein a composition change of a phase-separable base material glass film is suppressed. A method for manufacturing an optical member provided with a porous glass film on the base member includes the steps of forming a glass powder film containing a glass powder on the base member, forming a phase-separable base material glass film on the base member by heating and fusing the glass powder film in an atmosphere having an oxygen concentration of more than 20%, forming a phase-separated glass film on the base member by heating the base material glass film, and forming a porous glass film on the base member by subjecting the phase-separated glass film to an etching treatment.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: December 13, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoyuki Koketsu, Zuyi Zhang, Yoshinori Kotani, Akiko Takei, Akira Sugiyama, Kenji Takashima
  • Patent number: 9487439
    Abstract: Heavy-metal-free glass enamels are applied to glass and fired. After firing, the coated glass can subsequently be ion exchanged to give a chemically strengthened, decorated glass article.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: November 8, 2016
    Assignee: Ferro Corporation
    Inventors: Enos A. Axtell, III, George E. Sakoske
  • Patent number: 9409808
    Abstract: A bottom machine is provided for a glass processing device to manufacture glass containers from glass tubes. The bottom machine includes one or a plurality of holding units for holding the glass container or glass tube, with the holding units being mounted so as to rotate around an axis of rotation of the bottom machine in order to convey the glass container or glass tube to various processing positions, a pressure source for supplying a gas flow, a duct system communicating with the pressure source for directing the gas flow to the holding units and for feeding the gas flow into the glass tube or into the glass container, with the duct system being designed to be free of gaps.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: August 9, 2016
    Assignee: SCHOTT AG
    Inventors: Doris Moseler, Robert Frost, Ulrich Lange, Boban Markovic, Volker Rupertus, Bernhard Hladik
  • Publication number: 20150135772
    Abstract: An apparatus and method are provided for sintering a hollow cylindrical body of porous synthetic silica. The apparatus comprises a hollow mandrel for supporting the body in a horizontal position, and the mandrel is housed within a vacuum furnace having heating elements arranged to surround the body circumferentially along its entire length. The method includes supporting the body on a hollow horizontally-oriented mandrel in a vacuum furnace in which heating elements are disposed surrounding the body, and heating the body by means of the elements to a sintering temperature.
    Type: Application
    Filed: November 11, 2014
    Publication date: May 21, 2015
    Inventors: Alan Mundy, Ian George Sayce, Richard Benjamin Coapes
  • Publication number: 20150111040
    Abstract: A method capable of forming a sufficiently thick low alkali concentration region without heating glass to a high temperature and even in an atmosphere which is not an atmosphere of plasma formation gas such as helium and argon, is provided. A glass substrate having a pair of main surfaces and being made of glass containing an alkali oxide in its composition, is disposed between a first electrode and a second electrode so that one main surface is separated from the first electrode and the other main surface is brought into contact with the second electrode, and a corona discharge is generated by applying a direct-current voltage to the first electrode as a positive electrode and the second electrode as a negative electrode, in a positive-electrode-side surface layer portion of the glass substrate, at least one positive ion including an alkali ion migrate toward the negative-electrode-side.
    Type: Application
    Filed: December 22, 2014
    Publication date: April 23, 2015
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Shiro FUNATSU, Akio KOIKE, Kiyoshi YAMAMOTO, Yuichi YAMAMOTO, Hiroshi WAKATSUKI, Junji NISHII, Kenji HARADA, Hiroshi IKEDA, Daisuke SAKAI
  • Publication number: 20140373574
    Abstract: A bottom machine is provided for a glass processing device to manufacture glass containers from glass tubes. The bottom machine includes one or a plurality of holding units for holding the glass container or glass tube, with the holding units being mounted so as to rotate around an axis of rotation of the bottom machine in order to convey the glass container or glass tube to various processing positions, a pressure source for supplying a gas flow, a duct system communicating with the pressure source for directing the gas flow to the holding units and for feeding the gas flow into the glass tube or into the glass container, with the duct system being designed to be free of gaps.
    Type: Application
    Filed: June 25, 2014
    Publication date: December 25, 2014
    Inventors: Doris Moseler, Robert Frost, Ulrich Lange, Boban Markovic, Volker Rupertus, Bernhard Hladik
  • Publication number: 20140220309
    Abstract: A glass film has a first and a second surface which are both defined by like edges, wherein the surface of at least two edges which are located opposite one another have an average surface roughness of an maximum of 2 nanometers.
    Type: Application
    Filed: April 7, 2014
    Publication date: August 7, 2014
    Applicant: Schott AG
    Inventors: Jürgen Vogt, Thomas Wiegel, Holger Wegener, Ulrich Neuhäusler, Angelika Ullmann
  • Patent number: 8735308
    Abstract: The present invention relates to an optical member including a TiO2-containing silica glass having: a TiO2 concentration of from 3 to 10% by mass; a Ti3+ concentration of 100 wt ppm or less; a thermal expansion coefficient at from 0 to 100° C., CTE0-100, of 0±150 ppb/° C.; and an internal transmittance in the wavelength range of 400 to 700 nm per a thickness of 1 mm, T400-700, of 80% or more, in which the optical member has a ratio of variation of Ti3+ concentration to an average value of the Ti3+ concentration, ?Ti3+/Ti3+, on an optical use surface, is 0.2 or less.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: May 27, 2014
    Assignee: Asahi Glass Company, Limited
    Inventors: Akio Koike, Chikaya Tamitsuji, Kunio Watanabe, Tomonori Ogawa
  • Publication number: 20140120311
    Abstract: A thermo-electric method for texturing a glass surface including, for example, simultaneously heating a glass substrate to a temperature less than its glass transition temperature and applying a bias across the glass substrate using a template electrode. The applied bias at the processing temperature induces localized ion migration within the glass, which results in the formation in the glass surface of a negative topographical image of the pattern formed in the electrode.
    Type: Application
    Filed: October 25, 2012
    Publication date: May 1, 2014
    Inventor: Nicholas James Smith
  • Publication number: 20140109619
    Abstract: An improved system and method is disclosed for providing cooling air to mating mold halves during the entire cycle and an additional degree of cooling during the portion of the cycle when hot glass material is enclosed within mating mold halves. Countercurrent cooling air flows are established in separate arrays of cooling passages located in each mold half, with one of the cooling air flows being capable of actively cooling the mold halves over the full cycle rather than only when the mold halves are in their closed position. The cooling air flowing in the separate arrays of cooling passages allows separate timing and control of the cooling air flows supplied to the arrays of cooling passages in the molds.
    Type: Application
    Filed: December 21, 2012
    Publication date: April 24, 2014
    Inventors: Pedro Pontes, Stefano Vecchi
  • Patent number: 8650911
    Abstract: Glass is heated from above and below while the glass resides on rolls (3) in a tempering furnace (1). The upper surface of the glass (4) is heated by hot air jets formed by sucking air from inside the furnace (1) and pressurizing the hot air and recycling it back to the upper surface of the glass. Air which has been taken from outside the furnace (1) and pressurized by a compressor (17) and heated is blown to the lower surface of the glass.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: February 18, 2014
    Assignee: Uniglass Engineering Oy
    Inventor: Jukka Vehmas
  • Publication number: 20140026622
    Abstract: Methods and apparatus for convective heat treatment of thin glass sheets (17) are provided. The glass sheets (17) are held in a fixture (9) which has a processing volume (19) which has an open top and an open bottom. A bottom support system (15) supports the bottom edges of the glass sheets (17) without blocking a substantial portion of the processing volume's open bottom. A side support system (13) holds the vertical edge regions of the glass sheets during the convective heat treatment, thus reducing vibration and distortion (warp) of the sheets as a result of the heat treatment. The side support system (13) can include vertical members (33) having arms (37) that can include lips (73) for engaging the major surfaces of the glass sheets (17).
    Type: Application
    Filed: April 17, 2012
    Publication date: January 30, 2014
    Applicant: Corning Incorporated
    Inventor: Wenchao Wang
  • Publication number: 20130301127
    Abstract: To provide a low-cost wave plate that does not cause any diffracted light and wavefront aberrations. The challenge is met by providing a wave plate characterized by including a first region, a second region, and a third region which are placed on a glass substrate. The first region and the second region exhibit each uniaxial birefringence at least in their portions. The third region exhibits uniaxial birefringence and is interposed between the first region and the second region. Phase advance axes of birefringence of the first region and the second region are substantially parallel to each other. A phase advance axis of birefringence of the third region is substantially orthogonal to the phase advance axes of birefringence of the first and second regions.
    Type: Application
    Filed: July 19, 2013
    Publication date: November 14, 2013
    Applicant: Asahi Glass Company, Limited
    Inventors: Gousuke Yoshida, Motoshi Ono, Mitsuru Watanabe
  • Publication number: 20130291592
    Abstract: A method for heating glass sheets includes alternately loading on a conveyor system two different sets of glass sheets with the glass sheets of each set having different properties than those of the other set so as to require different heating than each other; conveying the alternately loaded sets of glass sheets on the conveyor system along a plane of conveyance through a heating chamber having a heating system; and controlling operation of the heating system to provide two different sets of heating zones alternating along the direction of conveyance and respectively moving with the two sets of glass sheets so as to provide heating in the heating chamber of each set of glass sheets as required and in a different way than the heating of the other set of glass sheets.
    Type: Application
    Filed: July 8, 2013
    Publication date: November 7, 2013
    Inventors: Troy R. Lewandowski, James P. Schnabel, JR.
  • Publication number: 20130287977
    Abstract: A reed switch glass tube is capable of preventing, for example, chipping and cracking of end parts thereof by forming a compressive stress layer having a length (A) from an end face within a range of 0.1 mm to 0.6 mm on an outer circumference surface of the end part of the glass tube.
    Type: Application
    Filed: November 30, 2011
    Publication date: October 31, 2013
    Applicant: NIPPON ELECTRIC GLASS CO., LTD.
    Inventors: Ryota Mashima, Masahiro Kobayashi, Ken Kashiwadani
  • Patent number: 8479540
    Abstract: Glass is heated from above and below while the glass resides on rolls (3) in a tempering furnace (1). The upper surface of the glass (4) is heated by hot air jets formed by sucking air from inside the furnace (1) and pressurizing the hot air and recycling it back to the upper surface of the glass. Air which has been taken from outside the furnace (1) and pressurized by a compressor (17) and heated is blown to the lower surface of the glass.
    Type: Grant
    Filed: June 9, 2004
    Date of Patent: July 9, 2013
    Assignee: Uniglass Engineering Oy
    Inventor: Jukka Vehmas
  • Publication number: 20130126573
    Abstract: A method is provided for the internal processing of a transparent substrate in preparation for a cleaving step. The substrate is irradiated with a focused laser beam that is comprised of pulses having an energy and pulse duration selected to produce a filament within the substrate. The substrate is translated relative to the laser beam to irradiate the substrate and produce an additional filament at one or more additional locations. The resulting filaments form an array defining an internally scribed path for cleaving said substrate. Laser beam parameters may be varied to adjust the filament length and position, and to optionally introduce V-channels or grooves, rendering bevels to the laser-cleaved edges.
    Type: Application
    Filed: July 12, 2011
    Publication date: May 23, 2013
    Applicant: FILASER INC.
    Inventors: S. Abbas Hosseini, Peter R. Herman
  • Patent number: 8402786
    Abstract: A process for producing a synthetic silica glass optical component which contains at least 1×1017 molecules/cm3 and has an OH concentration of at most 200 ppm and substantially no reduction type defects, by treating a synthetic silica glass having a hydrogen molecule content of less than 1×1017 molecules/cm3 at a temperature of from 300 to 600° C. in a hydrogen gas-containing atmosphere at a pressure of from 2 to 30 atms.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: March 26, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Yoshiaki Ikuta, Shinya Kikugawa, Akio Masui, Noriaki Shimodaira, Shuhei Yoshizawa
  • Publication number: 20130047671
    Abstract: Disclosed is a method of reducing the compaction of glass formed by a down draw process. The glass may be a glass sheet or a glass ribbon. Once the glass is formed, it is thermally treated on a molten metal bath for a time and at a temperature effective to reduce the fictive temperature of the glass below a predetermined level. In one embodiment, a glass ribbon is formed in a fusion process and the glass ribbon redirected onto a molten metal bath where the ribbon is thermally treated.
    Type: Application
    Filed: August 29, 2011
    Publication date: February 28, 2013
    Inventor: Jeffrey T. Kohli
  • Patent number: 8359885
    Abstract: An object of the present invention is to provide a surface-treated glass having a concave portion on the order of nanometers, in which the depth of the concave portion is sufficiently large for the size thereof and which is free from an abnormal bump portion and excellent in the transparency to visible light. The present invention relates to a surface-treated glass having a plurality of the concave portions provided in a glass surface, in which a plane of the glass surface, excluding a region in which the concave portions are formed, is a flat plane, and the concave portions have an average open pore diameter of 10 nm to less than 1 ?m in a cross-sectional view thereof.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: January 29, 2013
    Assignee: Asahi Glass Company, Limited
    Inventor: Shirou Tanii
  • Patent number: 8336332
    Abstract: Provided are a process for the production of a precision press-molded article having a high transmittance a method of treating a glass to color or decolor the glass, the process comprising heat-treating a press-molded article containing at least one selected from WO3, Nb2O5 or TiO2 in an oxidizing atmosphere to produce a glass molded article, and the method comprising heat-treating a colored glass containing at least one oxide of WO3 and Nb2O5 in an oxidizing atmosphere to decolor the glass, or heat-treating a glass containing at least one oxide selected from WO3, Nb2O5 or TiO2 in a non-oxidizing atmosphere to color the glass.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: December 25, 2012
    Assignee: Hoya Corporation
    Inventors: Kazutaka Hayashi, Hiromasa Tawarayama, Xuelu Zou, Hiroshi Kawazoe
  • Publication number: 20120308760
    Abstract: A luminescent glass comprises glass matrix. Said glass matrix comprises a glass part and a complex part of glass and fluorescent powder, which is embedded in said glass part. Said complex part of glass and fluorescent powder comprises glass material and fluorescent powder dispersed in said glass material. Said fluorescent powder is of cerium-doped yttrium aluminum garnet series. A method for producing the luminescent glass and a luminescent device comprising the luminescent glass are also provided. The luminescent glass and the luminescent device have good luminescence reliability, high luminescence stability and long service life. The method can be carried out at a relatively low temperature.
    Type: Application
    Filed: September 25, 2009
    Publication date: December 6, 2012
    Applicant: OCEAN'S KING LIGHTING SCIENCE & TECHNOLOGY CO., LTD.
    Inventors: Mingjie Zhou, Wenbo Ma, Guitang Chen
  • Patent number: 8322162
    Abstract: The invention relates to a method of heating glass panels for tempering. The horizontal glass panels are heated in a lehr by upper and lower convection blast and by upper and lower radiation heating, information representing a load of the glass panels and used for the control and/or regulation of heating is read, the upper radiation heating is controlled and/or regulated in the way of a matrix by a profiling both in a conveying direction and a direction lateral thereto. At least the upper convection blast is controlled and/or regulated in various sections of the lehr in the way of a matrix by a profiling both in a conveying direction and a direction lateral thereto, and the relative blast effects of convection blowing elements successive in the conveying direction are regulated for a profiling in the conveying direction. The invention relates also to an apparatus applying the method.
    Type: Grant
    Filed: March 16, 2005
    Date of Patent: December 4, 2012
    Assignee: Glaston Services Ltd. Oy
    Inventors: Toivo Janhunen, Tarmo Pesonen
  • Publication number: 20120297830
    Abstract: A method for improving the thermo-mechanical properties of an aluminum-titanate composite, the composite including at least one of strontium-feldspar, mullite, cordierite, or a combination thereof, including: combining a glass source and an aluminum-titanate source into a batch composition; and firing the combined batch composite composition to produce the aluminum-titanate composite. Another method for improving the thermo-mechanical properties of the composite dips a fired composite article into phosphoric acid, and then anneal the dipped composite article. The resulting composites have a thin glass film situated between the ceramic granules of the composite, which can arrest microcrack propagation.
    Type: Application
    Filed: May 27, 2011
    Publication date: November 29, 2012
    Inventors: Monika Backhaus-Ricoult, Christopher Raymond Glose
  • Publication number: 20120258022
    Abstract: The present invention discloses a vacuum chamber having operating pressures in the ultra-high vacuum (UHV) range (10?8 torr to 10?13 torr) and incorporating transparent windows, said windows constructed from transparent materials (preferably glass), and having low helium permeability velocity under operating and storage conditions. Embodiments may also contain surface coatings on windows to reduce helium permeation. Also disclosed herein is a method for vacuum processing said chamber by heating entire chamber and exposing the inside and outside of the chamber windows to helium free environments. Methods for final sealing said chamber are also discussed. The vacuum chamber is useful as a container for optically-cooled atoms for use in quantum information and atomic clocks and as a sensor for magnetic fields, gravitational fields, and inertial effects.
    Type: Application
    Filed: April 6, 2012
    Publication date: October 11, 2012
    Applicant: TRIAL TECHNOLOGY, INC.
    Inventors: Kenneth Jeramiah Hughes, Charles Ackley Sackett, Archie Theodore Brown
  • Patent number: 8225627
    Abstract: It is an object of the present invention to provide a new method for reducing the diameter of a bubble existing in a glass plate. Specifically, the present invention provides a method for reducing the diameter of a bubble existing in a glass plate, which comprises irradiating the vicinity of the bubble existing in the glass plate with a light beam emitted from a light source, to raise the temperature of the glass in the vicinity of the bubble to at least the melting point of the glass to reduce the maximum diameter of the bubble.
    Type: Grant
    Filed: October 15, 2007
    Date of Patent: July 24, 2012
    Assignee: Asahi Glass Company, Limited
    Inventors: Yutaka Kuroiwa, Setsuro Ito, Motoichi Iga
  • Patent number: 8206789
    Abstract: A method for forming a glass substrate comprises the steps of forming a glass blank with opposing substantially planar surfaces and at least one edge, coating the glass blank in silica-alumina nanoparticles, the silica-alumina nanoparticles comprising an inner core of silica with an outer shell of alumina, annealing the coated glass blank to form a conformal coating of silica-alumina around the glass blank, and polishing the coated glass blank to remove the conformal coating of silica-alumina from the opposing substantially planar surfaces thereof.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: June 26, 2012
    Assignee: WD Media, Inc.
    Inventor: Shoji Suzuki
  • Patent number: 8201421
    Abstract: To obtain an optical component having excellent secondary optical nonlinear properties by irradiating a surface and/or inside of glass having at least one member selected from Ni, Fe, V, Cu, Cr and Mn as a heat source material for absorbing and converting a laser beam to heat, incorporated to a glass matrix comprising at least one glass-forming oxide-selected from SiO2, GeO2, B2O3, P2O5, TeO2, Ga2O3, V2O5, MoO3 and WO3 and at least one member selected from alkali metals, alkaline earth metals, rare earth elements and transition elements, with a laser beam with a wavelength to be absorbed by the heat source material, to convert the irradiated portion to a single crystal or a group of crystal grains comprising components contained in the glass matrix and not containing the heat source material, thereby to form a pattern.
    Type: Grant
    Filed: August 11, 2008
    Date of Patent: June 19, 2012
    Assignees: Asahi Glass Company, Limited, Nagaoka University of Technology
    Inventors: Takayuki Komatsu, Tsuyoshi Honma, Takumi Fujiwara, Yasuhiko Benino
  • Publication number: 20120131960
    Abstract: High intensity plasma-arc heat sources, such as a plasma-arc lamp, are used to irradiate glass, glass ceramics and/or ceramic materials to strengthen the glass. The same high intensity plasma-arc heat source may also be used to form a permanent pattern on the glass surface—the pattern being raised above the glass surface and integral with the glass (formed of the same material) by use of, for example, a screen-printed ink composition having been irradiated by the heat source.
    Type: Application
    Filed: November 30, 2010
    Publication date: May 31, 2012
    Inventors: David C. Harper, Andrew A. Wereszczak, Chad E. Duty
  • Publication number: 20120111056
    Abstract: Apparatus, systems and methods for improving chemical strengthening of glass are disclosed. In one embodiment, a mechanical stress can be induced on a glass article while undergoing chemical strengthening. In another embodiment, vibrations, such as ultrasonic vibrations, can be induced during chemical strengthening of a glass article. The use of mechanical stress and/or vibrations during chemically strengthening of a glass article can enhance the effectiveness of the chemical strengthening process. Accordingly, glass articles that have undergone chemical strengthening processing are able to be not only thin but also sufficiently strong and resistant to damage. The strengthened glass articles are well suited for use in consumer products, such as consumer electronic devices (e.g., portable electronic devices).
    Type: Application
    Filed: May 14, 2011
    Publication date: May 10, 2012
    Inventor: Christopher Prest
  • Publication number: 20120111061
    Abstract: In a method for producing a fluorophosphate optical glass comprising melting a glass raw material to give a molten glass, and refining, homogenizing and then quickly quenching the molten glass to produce the fluorophosphate optical glass, even if the glass is flown from a refining tank that is set to a high temperature to an operation tank that is set to a low temperature, bubbles are not generated in the glass. The content of Fe in terms of Fe2O3 and the content of Cu in terms of CuO is controlled so that the total of the contents of Fe and Cu is 20 ppm or more, and the obtained fluorophosphate optical glass has such transmittance property that the internal transmittance in terms of a thickness of 10 mm becomes 98% or more at a wavelength region of at least from 400 to 500 nm.
    Type: Application
    Filed: October 21, 2011
    Publication date: May 10, 2012
    Applicant: HOYA CORPORATION
    Inventor: Mikio IKENISHI
  • Patent number: 8136372
    Abstract: A method of making a fused silica article having a combined concentration of protium and deuterium in a range from about 1×1016 molecules/cm3 up to about 6×1019 molecules/cm3. In some embodiments, deuterium is present in an amount greater than its natural isotopic abundance. The method includes the steps of providing a fused silica boule, diffusing at least one of protium and deuterium into the boule, and annealing the boule to form the fused silica article. A method of diffusing hydrogen into fused silica and a fused silica article loaded with hydrogen formed by the method are also described.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: March 20, 2012
    Assignee: Corning Incorporated
    Inventors: Michael A Mueller, Michael Thomas Murtagh
  • Publication number: 20120060558
    Abstract: Reducing the adjustment complexity during the forming of glass products, such as the forming of glass tubes to obtain syringe bodies. The glass of a glass pre-product may be heated to be formed, a laser may be used that emits light having a wavelength for which the glass of the glass pre-product is at most partially transparent so that the light is at least partially absorbed in the glass.
    Type: Application
    Filed: September 13, 2011
    Publication date: March 15, 2012
    Inventors: Georg Haselhorst, Thomas Risch
  • Patent number: 8124258
    Abstract: There is provided a glass substrate for a magnetic disk in which a maximum height of bumps forming a roughness pattern at a period of smaller than 2 ?m is 6 nm or lower in an annular area having a width of 30 ?m on a main surface on which a magnetic recording area is formed, a number of bumps having a height of 3 nm or higher in a unit area having a circular arc length of 30 ?m within the annular area is one or less, and a difference in arithmetic average roughness between unit areas within the annular area is 0.2 nm or smaller.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: February 28, 2012
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Shinpei Todo, Yasuhiro Naka
  • Publication number: 20120031145
    Abstract: A method of fabricating a decoratively-cracked glass vessel includes gathering a gob of molten glass and depositing the molten-glass gob into a pre-form mold. A quantity of gas is injected into the pre-form mold in order to form the gob into a pre-form vessel having at least one pre-form wall defining a pre-form vessel exterior surface and a pre-form vessel interior surface defining a pre-form cavity. The self-supporting, but still hot, pre-form vessel is removed from the pre-form mold and a surface of the pre-form vessel is rapidly cooled in order to crack in the cooled surface. The heated pre-form vessel is situated within a finish mold and a quantity of gas is injected into the pre-form cavity in order to seal cracks and form the pre-form vessel into a finished vessel having at least one finished vessel wall defining finished vessel interior and exterior surfaces between which cracks are visible.
    Type: Application
    Filed: August 2, 2011
    Publication date: February 9, 2012
    Inventor: Michael Arnold Albert Kramer
  • Patent number: 8104385
    Abstract: The brittle workpiece splitting system 1 includes a substrate holding mechanism 10 for holding a substrate 51, and a processing unit 5 for splitting the substrate 51 held by the substrate holding mechanism 10 by a splitting process. The substrate holding mechanism 10 has an edge damper 12 adapted to clamp an edge part of the substrate 51 from the sides of the opposite surfaces of the edge part, and support members 19 for supporting the substrate 51 thereon at a predetermined height. The support members 19 are disposed on the side opposite the side of the edge damper 12 with respect to the intended split line 61 parallel to the edge part of the substrate 51. The edge damper 12 has an edge holder 15 on which the substrate 51 is seated, and a pressure bar 14 for pressing the substrate 51 against the edge holder 15 to hold the substrate 51 between the edge holder 15 and the pressure bar 14.
    Type: Grant
    Filed: October 7, 2005
    Date of Patent: January 31, 2012
    Assignees: Shibaura Mechatronics Corporation, Kabushiki Kaisha Toshiba
    Inventors: Masakazu Hayashi, Shinji Nakata, Susumu Yahagi
  • Publication number: 20110259052
    Abstract: Unit for the surface treatment of flat glass, in particular in the form of a ribbon or a sheet, especially by modifying the chemical, optical or mechanical properties, or the deposition of one or more thin films, comprising heating and cooling means for creating a controlled temperature gradient through the thickness of the glass, means for heating that face to be treated, in order for it to always be at the required temperatures and for the times necessary for obtaining effective treatments of the surface thereof and means for cooling the opposite face in order for this opposite face to have a viscosity of between 1013 dPa·s and 2.3×1010 dPa·s.
    Type: Application
    Filed: July 24, 2009
    Publication date: October 27, 2011
    Applicant: FIVES STEIN
    Inventor: Wolf Stefan Kuhn
  • Patent number: 8042359
    Abstract: Methods for heat treating glass sheets (13) are disclosed in which the sheets (13) are held in a vertical orientation in a treatment container (15) during the heat treatment. The container (15) includes a support system for the glass sheets (13) that comprises a bottom support (17), two side supports (19a, 19b), and a top support (21). The sheets (13) are slid into the container (15) without contact between their side edges (23a, 23b) and the side supports (19a, 19b). The top support (21) is then slid onto the tops of the sheets (13) without contacting the sheets' top edges (25). In certain embodiments, flushing air which has been HEPA filtered and pre-heated is passed through the container (15) during the heat treatment. Apparatus for practicing the methods of the invention are also disclosed.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: October 25, 2011
    Assignee: Corning Incorporated
    Inventors: Frank Thomas Coppola, Ronald Alan Davidson, Michael Brian Gildea, Gerard Kaper, Jason C Lail, Monica Jo Mashewske
  • Publication number: 20110252834
    Abstract: A wave plate is disclosed which includes a glass plate having a thickness of at least 0.1 mm and at most 5 mm. The glass plate has a plurality of strip-shaped birefringent regions substantially in parallel with a surface of the glass plate. The axial directions of the strip-shaped birefringent regions are the same with one another, and substantially in parallel with the surface of the glass plate. The wave plate has a retardation value of from 80 to 450 nm as measured with incident light having a wavelength of 540 nm.
    Type: Application
    Filed: June 10, 2011
    Publication date: October 20, 2011
    Inventor: Motoshi Ono
  • Publication number: 20110257000
    Abstract: The invention relates to a lithium silicate glass ceramic, which contains at least 8.5 wt.-% transition metal oxide selected from the group consisting of oxides of yttrium, oxides of transition metals with an atomic number from 41 to 79 and mixtures of these oxides. The invention also relates to a corresponding lithium silicate glass, a process for the preparation of the glass ceramic and of the glass as well as their use.
    Type: Application
    Filed: April 4, 2011
    Publication date: October 20, 2011
    Applicant: IVOCLAR VIVADENT AG
    Inventors: Christian RITZBERGER, Wolfram HOLAND, Marcel SCHWEIGER, Volker RHEINBERGER
  • Publication number: 20110256409
    Abstract: Lithium silicate glass ceramics and glasses are described which can advantageously be applied to zirconium oxide ceramics in particular by pressing-on in the viscous state and form a solid bond with these.
    Type: Application
    Filed: April 5, 2011
    Publication date: October 20, 2011
    Applicant: IVOCLAR VIVADENT AG
    Inventors: Christian RITZBERGER, Ricardo DELLAGIACOMO, Marcel SCHWEIGER, Harald BURKE, Wolfram H?LAND, Volker RHEINBERGER
  • Patent number: 8028541
    Abstract: Disclosed is a method of producing a barium-titanium-based ferroelectric glass using a containerless solidification process, such as an electrostatic levitation process or a gas levitation process, which comprises the steps of levitating a sample 1 of a barium-titanium-based compound by a levitating force of compressed air, heating the sample up to a temperature greater than its melting point (1330° C.) by about 100° C. to allow the sample to be molten, and, after maintaining the molten state for a given time period (at least several second), quenching the sample from a given temperature range (1400 to 1000° C.) at a cooling rate of about 103 K/sec, so as to allow the sample to be solidified while inhibiting nucleation and mixing of impurities from a container. The present invention makes it possible to provide a glass exhibiting an unprecedented, extremely large permittivity.
    Type: Grant
    Filed: March 8, 2006
    Date of Patent: October 4, 2011
    Assignee: Japan Aerospace Exploration Agency
    Inventors: Kentei Yono, Takehiko Ishikawa, Yasutomo Arai, Shinichi Yoda
  • Patent number: 7980096
    Abstract: In order to avoid deposition of evaporating alkali compounds on an inner surface of a hollow glass body during thermal processing to form a glass container from the hollow glass body, an overpressure is provided in the hollow glass body during the thermal processing. Either rinsing the hollow glass body with a gas, such as air, or at least partially closing the glass body at one end so that sufficiently rapid pressure equilibration is avoided, can provide this overpressure. The glass containers made by these methods are especially suited for food or pharmaceuticals because they have a reduced alkali release from their inner surfaces, for example at most about 2.0 mg/l sodium oxide.
    Type: Grant
    Filed: July 23, 2003
    Date of Patent: July 19, 2011
    Assignee: Schott AG
    Inventor: Reiner Bartsch
  • Patent number: 7966844
    Abstract: A first sleeve 30 regulates the horizontal relative position between an upper mold 10 and a lower mold 20 that are insertable into the first sleeve 30 from its both end sides. A second sleeve 40 provided inside the first sleeve 30 and surrounding the outer periphery of a molding surface 21 of the lower mold 20 supports at least part of an outer peripheral portion of a molding material 50 placed on the molding surface 21 of the lower mold 20, thereby preventing position offset and slip-off of the molding material 50. In this state, the molding material 50 is press-molded between the upper mold 10 and the lower mold 20.
    Type: Grant
    Filed: January 19, 2006
    Date of Patent: June 28, 2011
    Assignee: Hoya Corporation
    Inventor: Kenji Yamanaka
  • Patent number: 7964522
    Abstract: An F-doped silica glass, a process for making the glass, an optical member comprising the glass, and an optical system comprising such optical member. The glass material comprises 0.1-5000 ppm by weight of fluorine. The glass material according to certain embodiments of the present invention has low polarization-induced birefringence, low LIWFD and low induced absorption at 193 nm.
    Type: Grant
    Filed: August 14, 2007
    Date of Patent: June 21, 2011
    Assignee: Corning Incorporated
    Inventors: Lisa Anne Moore, Charlene Marie Smith
  • Patent number: 7954340
    Abstract: When a synthetic quartz glass substrate is prepared from a synthetic quartz glass block, (I) the block has a hydrogen molecule concentration of 5×1017-1×1019 molecules/cm3, (II) the substrate has a hydrogen molecule concentration of 5×1015-5×1017 molecules/cm3, (III) the substrate has an in-plane variation of its internal transmittance at 193.4 nm which is up to 0.2%, and (IV) the substrate has an internal transmittance of at least 99.6% at 193.4 nm. The synthetic quartz glass substrate has a high transmittance and a uniform transmittance distribution, and is adapted for use with excimer lasers, particularly ArF excimer lasers.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: June 7, 2011
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Hisatoshi Otsuka, Kazuo Shirota, Osamu Sekizawa
  • Publication number: 20110107795
    Abstract: A method of coloring a surface of a zirconium-based metallic glass component that includes the step of imparting interference colors by carrying out an anodizing process using an alkaline solution to form a film having a thickness of 300 nm or less on the surface of the zirconium-based metallic glass component.
    Type: Application
    Filed: January 19, 2011
    Publication date: May 12, 2011
    Applicants: NGK Insulators, Ltd., Tohoku University
    Inventors: Naokuni MURAMATSU, Ken Suzuki, Akihisa Inoue, Hisamichi Kimura
  • Patent number: 7934390
    Abstract: The invention relates to a method for the manufacture of a lens of synthetic quartz glass with increased H2 content, in particular for a lens for an optical system with an operating wavelength of less than 250 nm, in particular less than 200 nm, with the steps: providing a precursor product of synthetic quartz glass, in particular with a first H2 content of less than 2·1015 molecules/cm3, with a circumferential border surface and two base surfaces lying on opposite sides, wherein at least one partial surface of at least one of said base surfaces has a curvature, and treating the precursor product in an H2-containing atmosphere in order to produce a precursor product of synthetic quartz glass with a second H2 content that is increased in relation to the first H2 content, in particular with a second H2 content of more than 1016 molecules/cm3, and measuring at least one optical property of said precursor product with said second H2 content.
    Type: Grant
    Filed: May 14, 2007
    Date of Patent: May 3, 2011
    Assignee: Carl Zeiss SMT GmbH
    Inventor: Eric Eva