Running Length Patents (Class 65/176)
  • Publication number: 20140373572
    Abstract: A glass ribbon engagement system is described herein that includes a robot tooling device with suction cups configured to engage a first side of a glass ribbon, and a guidance device with one or more devices (e.g., air nozzles, cylinder-wheel units) which are configured to apply one or more local forces to a second side of the glass ribbon to shift the glass ribbon towards the suction cups to assist the suction cups in engaging and securing the first side of the glass ribbon.
    Type: Application
    Filed: March 7, 2013
    Publication date: December 25, 2014
    Applicant: Corning Incorporated
    Inventors: James William Brown, Shawn Rachelle Markham, Naiyue Zhou, Zepei Zhu
  • Patent number: 8887529
    Abstract: A process and apparatus for cutting a continuous glass ribbon involving the use of edge restrainers such as suction cups and clamps connected to an actuator of a robot tooling through a flexible linkage capable of reciprocal motion in the direction of the ribbon velocity. The use of the flexible linkage reduces peak pulling-force when the glass ribbon is pulled or pushed laterally to during bending and separation along a pre-formed score-line. The invention can be advantageously used in the bottom of the draw of a vertical down-draw forming process.
    Type: Grant
    Filed: October 26, 2011
    Date of Patent: November 18, 2014
    Assignee: Corning Incorporated
    Inventors: Hung Cheng (Henry) Lu, Wei Xu, Liming Wang, Naiyue Zhou
  • Publication number: 20140298863
    Abstract: Disclosed are methods for compensating the varying weight of a glass ribbon the glass ribbon is drawn from a molten glass forming material, and an apparatus therefore. The weight compensating apparatus is configured to apply a force to the glass ribbon that is inversely proportional to the weight of the glass ribbon such that as the glass ribbon weight increases, the force applied to the glass ribbon by the weight compensating device decreases.
    Type: Application
    Filed: June 20, 2014
    Publication date: October 9, 2014
    Inventors: Shawn Rachelle Markham, Jae Hyun Yu
  • Publication number: 20140216107
    Abstract: A fusion draw apparatus includes a pair of engagement rollers. At least one of the pair of engagement rollers includes a circumferential knife edge configured to cooperate with the other of the pair of engagement rollers to thin the edge portion or sever the edge portion from a central portion of the glass ribbon within the viscous zone of the glass ribbon. In further examples, fusion draw methods include the step of thinning the edge portion or severing the edge portion from the central portion of the glass ribbon within the viscous zone.
    Type: Application
    Filed: February 24, 2012
    Publication date: August 7, 2014
    Inventors: Pierre Brunello, Allan Mark Fredholm, Claude Francois Maurice Gille, Kamel Madi, Xavier Tellier
  • Publication number: 20140123708
    Abstract: A scoreless separation device and method are described herein for separating a glass sheet without needing to score the glass sheet. In one embodiment, the device shears a stationary glass sheet without needing to score the glass sheet. In another embodiment, the device shears a moving glass sheet to remove outer edges from the moving glass sheet without needing to score the moving glass sheet.
    Type: Application
    Filed: January 10, 2014
    Publication date: May 8, 2014
    Applicant: Corning Incorporated
    Inventors: Michael Albert Joseph, II, Steven Edward DeMartino
  • Publication number: 20140123709
    Abstract: A scoreless separation device and method are described herein for separating a glass sheet without needing to score the glass sheet. In one embodiment, the device shears a stationary glass sheet without needing to score the glass sheet. In another embodiment, the device shears a moving glass sheet to remove outer edges from the moving glass sheet without needing to score the moving glass sheet.
    Type: Application
    Filed: January 10, 2014
    Publication date: May 8, 2014
    Applicant: Corning Incorporated
    Inventors: Michael Albert Joseph, II, Steven Edward DeMartino
  • Publication number: 20140013802
    Abstract: The invention relates to a device and a method for trimming a float glass strip that has a normal or structured surface, comprising the following features: a) a cutting slide having a lower running rail and a cutting slide having an upper running rail for a bottom cut for a structured surface or a top cut for a normal surface, wherein both running rails are arranged at an acute angle to the running direction of the glass strip and this angled position can be adjusted; b) a number of counter pressure rollers for the lower cutting slide; c) a hold-down apparatus (6) having a breaking roller (20) and a front hold-down roller (21) for a bottom cut; d) a hold-down apparatus (15) having a breaking roller (14) and a rear hold-down roller (18) for a top cut; e) apparatuses (10, 11, 12) for measuring the advance speed of the glass strip (11) and the current length of the glass strip.
    Type: Application
    Filed: April 2, 2012
    Publication date: January 16, 2014
    Applicant: GRENZEBACH MASCHINENBAU GMBH
    Inventor: Wolfgang Niewiera
  • Patent number: 8245539
    Abstract: Methods of producing a glass sheet comprise the step of fusion drawing a glass ribbon along a draw direction into a viscous zone downstream from a root of a forming wedge. The method further includes the steps of drawing the glass ribbon into a setting zone downstream from the viscous zone and an elastic zone downstream from the setting zone. The method also includes the step of creating a vacuum to force the entire lateral portion of the glass ribbon to engage an anvil portion of a breaking device in the elastic zone. The method still further includes the steps of forming a score line along the lateral portion of the glass ribbon and breaking away a glass sheet from the glass ribbon along the score line while the entire lateral portion is forced against the anvil portion by the vacuum.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: August 21, 2012
    Assignee: Corning Incorporated
    Inventors: Hung Cheng Lu, Dean G. Sakona, Naiyue Zhou
  • Publication number: 20120111058
    Abstract: One objective of the present invention was to provide a method of continuously forming crystallized glass, so as to reduce the thermal treatment time necessary for crystallizing a belt-shaped glass plate; and to provide an apparatus of continuously forming crystallized glass, so as to shorten the thermal treatment zone necessary for crystallizing a belt-shaped glass plate. A method of continuously forming crystallized glass according to the present invention includes: a melting step of melting a raw glass material to obtain molten glass; a shaping step of rolling the molten glass to form a belt-shaped glass plate; a crystallizing step of retaining the belt-shaped glass plate at a temperature necessary for nuclei formation and crystal growth, thereby forming nuclei and crystallizing the belt-shaped glass plate to a belt-shaped crystallized glass plate, and then slowly cooling the belt-shaped crystallized glass plate; and a cutting step of cutting the belt-shaped crystallized glass plate.
    Type: Application
    Filed: September 20, 2011
    Publication date: May 10, 2012
    Applicants: Ta Hsiang Containers Ind. Co., Ltd., Huzhou Ta Hsiang Glass Products Co., Ltd.
    Inventors: Kuo-Chuan Hsu, Yanbin Jiang
  • Patent number: 8171753
    Abstract: A method of scoring and/or separating a brittle material is described comprising heating a surface of the brittle material along a predetermined path with a laser, then quenching the heated surface with a stream of cooling liquid, such as water, formed by a nozzle. The portion of the cooling stream impinging on the surface of the brittle material is a substantially columnar flow.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: May 8, 2012
    Assignee: Corning Incorporated
    Inventors: Anatoli A. Abramov, Weiwei Luo
  • Publication number: 20120103018
    Abstract: A process and apparatus for cutting a continuous glass ribbon involving the use of edge restrainers such as suction cups and clamps connected to an actuator of a robot tooling through a flexible linkage capable of reciprocal motion in the direction of the ribbon velocity. The use of the flexible linkage reduces peak pulling-force when the glass ribbon is pulled or pushed laterally to during bending and separation along a pre-formed score-line. The invention can be advantageously used in the bottom of the draw of a vertical down-draw forming process.
    Type: Application
    Filed: October 26, 2011
    Publication date: May 3, 2012
    Inventors: Hung Cheng (Henry) Lu, Wei Xu, Liming Wang, Naiyue Zhou
  • Publication number: 20120094821
    Abstract: a method and to an apparatus for producing optical glass elements, in particular for producing what is referred to as low-cost optics for focusing light onto small areas, for example, for photovoltaic applications or optical couplers. The method for producing the optical glass elements includes: providing a glass rod having a selected cross-section, heating the glass rod such that it can be deformed in at least some sections, molding at least one optical glass element from the deformable section using a molding tool, separating the optical glass element from the glass rod at the connection, arranging a plurality of separated optical glass elements to form a group, and grinding and/or polishing at least one section of the separating surfaces of the grouped optical glass elements. The invention makes it possible to produce optical glass elements that meet low quality requirements in high quantities and with high output at low cost.
    Type: Application
    Filed: April 22, 2010
    Publication date: April 19, 2012
    Inventors: Christian Schenk, Ulrich Fotheringham
  • 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
  • Patent number: 7975581
    Abstract: The apparatus for cutting glass panes from a continuously produced glass sheet includes a conveying apparatus for the glass sheet and for crosscut pieces; a crosscutting device for cutting the crosscut pieces from the glass sheet; a glass pane cutting device for cutting glass panes from the crosscut pieces; a glass fault detecting device; a border trimming station for cutting away borders; an edge control device and a cutting optimization device. The cutting optimization device determines one or more optimized cutting patterns so that cutting lines are placed in each crosscut piece close to regions to be discarded containing glass faults so that widths of the regions are minimized while providing a maximum number of usable glass panes. A method of cutting off glass panes so that the discarded glass sheet regions are minimized is also disclosed.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: July 12, 2011
    Assignee: Schott AG
    Inventors: Peter Benischke, Klaus-Peter Lexow, Axel Werner
  • Publication number: 20100162758
    Abstract: The invention relates to a method and a device for severing a marked region of a glass strip (1) produced continuously on a conveyor belt (11), having the following characteristics: a) a line (12) highlighting the severing of the marked region is scored on the continuous glass strip (1), b) once the scored line (12) reaches the crusher roll (6), the two lock rolls (7, 8) following the crusher roll (6) are folded away downward, c) once the scored line (12) is located in the region of the highest area of the crusher roll (6), means for shearing off (5) push onto the glass strip (1) and break it off, d) after the broken-off glass piece (10) has dropped, the lock rolls (7, 8, 9) are folded back in the conveyor belt (11), and to a computer program and a machine-readable carrier with the program code thereof.
    Type: Application
    Filed: September 3, 2008
    Publication date: July 1, 2010
    Applicant: Grenzebach Maschinenbau GmbH
    Inventor: Edwin Lang
  • Publication number: 20090133442
    Abstract: An apparatus and a method for cutting float glass is disclosed. A burner and water spray are arranged to cause thermal stress cracking along a cutting line extending along a continuous glass ribbon, parallel with the edge of the ribbon. The thermal stress cracking is initiated without the use of mechanical force. Preferably, the burner is used to initiate the thermal stress crack, by increasing the power supplied to the glass.
    Type: Application
    Filed: September 18, 2006
    Publication date: May 28, 2009
    Inventor: Joachim Bretschneider
  • Patent number: 7516628
    Abstract: An on-line thickness gauge (OLTG) and method are described herein that are capable of measuring a thickness of a moving glass substrate. In the preferred embodiment, the OLTG includes a Y-guide and a stabilizing unit that respectively captures and stabilizes the moving glass substrate. The OLTG also includes a laser instrument which contains a laser source and a detector. The laser source emits a beam at the front surface of the moving glass substrate. And, the detector receives two beams one of which was reflected by the front surface of the moving glass substrate and the other beam which was reflected by the back surface of the moving glass substrate. The OLTG further includes a processor that analyzes the two beams received by the detector to determine a distance between the two beams which is then used to determine the thickness of the moving glass substrate.
    Type: Grant
    Filed: January 11, 2005
    Date of Patent: April 14, 2009
    Assignee: Corning Incorporated
    Inventors: Kenneth C. Chen, Edward J. Lenhardt, Daniel Y. K. Ma, Jeffrey C. McCreary, James P. Terrell, Jr.
  • Patent number: 7059154
    Abstract: The present invention relates to a float process for manufacturing glass sheets, in which molten glass is poured onto a liquid support denser than the glass and then the continuous ribbon which forms is advanced toward the downstream end, this process being characterized in that the thickened edges of the ribbon are trimmed continuously in the forming zone. This process makes it possible to obtain thin glass sheets, such as sheets of film glass, with good flatness, particularly in small plants. The invention also relates to a plant for implementing the process and to the products obtained. FIG. 1.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: June 13, 2006
    Assignee: Saint-Gobain Glass France
    Inventors: Christophe Quentin, Michel Bellettre, Robert Germar
  • 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: 6289696
    Abstract: In an apparatus (1) for the severing of gobs from one or more strands (2;3) of molten glass, the severing of each gob is effected by a shear blade pair (5;6). A shear blade (7,8;9,10) of each shear blade pair is arranged on an associated, pivotably mounted shear arm (11;12). The two shear arms (11;12) are coaxially and freely pivotably mounted relative to each other on a common column (13). Each shear arm is pivotably drivable synchronously in relation to the other by its own separate drive means (24;25).
    Type: Grant
    Filed: March 7, 1996
    Date of Patent: September 18, 2001
    Assignee: The Firm Herman Heye
    Inventors: Hermann Bögert, Gerhard Geisel
  • Patent number: 6143676
    Abstract: An object of the present invention is to provide a synthetic silica glass optical material which exhibits excellent transmittance as well as durability for high output power vacuum ultraviolet rays, being emitted from, for example, ArF excimer lasers and Xe.sub.2 excimer lamps, and to provide a method for producing the same. A synthetic silica glass optical material for high output power vacuum ultraviolet rays made from ultra high purity synthetic silica glass for use in the wavelength region of from 165 to 195 nm, containing OH groups at a concentration of from 5 to 300 wtppm with a fluctuation width in OH group concentration (.DELTA.OH/cm) of 10 wtppm or less, containing hydrogen molecules at a concentration of from 1.times.10.sup.17 to 1.times.10.sup.19 molecule/cm.sup.3 with a fluctuation width in hydrogen molecule concentration (.DELTA.H.sub.2 /cm) of 1.times.10.sup.17 molecule/cm.sup.3 or lower, and containing chlorine at a concentration of 50 wtppm or lower.
    Type: Grant
    Filed: January 14, 1999
    Date of Patent: November 7, 2000
    Assignees: Heraeus Quarzglas GmbH, Shin-Etsu Quartz Products Co., Ltd.
    Inventors: Norio Ohashi, Michiyo Kuriyama, Shigeru Yamagata, Shigemasa Sunada
  • Patent number: 6098862
    Abstract: An incrementally continuous cleaving system allows for sequential flow of "material-to-be-cleaved" through a cleaving apparatus. In particular, a continuous feed tape membrane is used to support sequentially loaded optical bars (or, perhaps, wafers) that are then transported into a cleaving apparatus. The tape is advanced in small increments so that individual cleaving operations are performed at each scribe mark location on the top surface of the optical material. A vacuum pen (assisted by a detach pin) is then used to remove the cleaved section from the cleaving system. A conventional pick-and-place device may be used in the first instance to continuously load the bars (or wafers) onto the tape membrane.
    Type: Grant
    Filed: May 18, 1998
    Date of Patent: August 8, 2000
    Assignee: Lucent Technologies Inc.
    Inventors: Utpal Kumar Chakrabarti, David Reese Peale
  • Patent number: 6050107
    Abstract: A method of forming barrier ribs for a display panel, comprising the steps of: forming a glass layer for an underlying layer having a first low-melting glass powder with a softening point of a temperature A dispersed in a vehicle, and a glass layer for a barrier-rib layer having a second low-melting glass powder with a softening point of a temperature B2 higher than the temperature A and a third low-melting glass powder with a softening point of a temperature B1 higher than the temperature A but lower than the temperature B2 dispersed in a vehicle, on a substrate in this order; heating up to sinter the glass layer for the underlying layer and the glass layer for the barrier-rib layer at a temperature Z higher than the temperature A but lower than the temperature B2, thereby burning out the vehicles therefrom, forming a carve-resistive underlying layer and a barrier-rib material layer easy to carve; forming a mask for carving in a pattern corresponding in plan to barrier ribs on the barrier-rib material layer,
    Type: Grant
    Filed: June 2, 1998
    Date of Patent: April 18, 2000
    Assignee: Fujitsu Limited
    Inventors: Osamu Toyoda, Keiichi Betsui, Akira Tokai, Hironobu Kawano
  • Patent number: 6012304
    Abstract: A number of unique processes are disclosed for manufacture of sintered high-purity quartz glass products in which a shaped silica body or preform is made from an aqueous slurry of micronized silica particles by gel casting, slip casting or electrophoretic deposition. The silica particles may comprise a major portion by weight of crystalline silica. In one embodiment of the invention the sintered quartz glass is transparent, substantially bubble-free and suitable for scientific or optical uses. In another embodiment the porous silica preform is fired in steam to increase the hydroxyl content and then nitrided in a nitrogen-hydrogen reducing atmosphere. A minute amount of chemically-combined nitrogen in the high-purity quartz glass is sufficient to provide a tremendous improvement in physical properties and an incredible increase in the resistance to devitrification.
    Type: Grant
    Filed: February 22, 1997
    Date of Patent: January 11, 2000
    Inventors: Ted A. Loxley, John F. Blackmer, Klaus-Markus Peters
  • Patent number: 5928773
    Abstract: A neutral pH foamed glass article is produced from a mixture of pulverized glass particles, foaming agent, binder, and water, wherein the glass article is heated to remove excess moisture and organic materals, then further heated to cause the foaming agent to emit a foaming gas, thereby causing foaming of the glass article. The foamed glass article is annealed in a controlled cooling fashion to avoid thermal stress, cracking and devitrification. The foamed glass articles may be used as artificial pumice stones in the stone-washed garment industry. Preferably, the mixture contains an amount of lignosulfonate to produce foamed glass having substantially neutral pH values in a range of from about 7.0 to 8.4.
    Type: Grant
    Filed: October 28, 1996
    Date of Patent: July 27, 1999
    Assignee: Vitric Corporation
    Inventor: James C. Andersen
  • Patent number: 5917103
    Abstract: Quartz powder is fed into a rotating mold to form a crucible-like quartz powder layer body with the help of centrifugal force in the mold. The layer is melted by heating through the inner surface with an arc discharge to manufacture an outer crucible member. A hollow cylindrical inner crucible member having a beveled lower edge is welded to the outer crucible member while a temperature of the inner surface portion of the outer crucible member remains at 1400.degree. C. or higher by a remaining heat.
    Type: Grant
    Filed: May 24, 1996
    Date of Patent: June 29, 1999
    Assignees: Heraeus Quarzglas GmbH, Shin-Etsu Quartz Products Co., Ltd.
    Inventors: Hiroyuki Watanabe, Tatsuhiro Sato, Hiroshi Matsui
  • Patent number: 5908482
    Abstract: A silica glass has a structure determination temperature of 1200K or lower and a hydrogen molecule concentration of 1.times.10.sup.17 molecules/cm.sup.3 or more. The silica glass is used together with light in a wavelength region of 400 nm or shorter. The silica glass is produced by heating a silica glass ingot having a hydrogen molecule concentration of 1.times.10.sup.17 molecules/cm.sup.3 or more to a temperature of 1200-1350K, retaining the ingot at that temperature for a given period of time, and then, cooling the ingot to a temperature of 1000K or lower at a temperature-lowering rate of 50K/hr or less to anneal the ingot.
    Type: Grant
    Filed: September 11, 1997
    Date of Patent: June 1, 1999
    Assignee: Nikon Corporation
    Inventors: Norio Komine, Hiroyuki Hiraiwa
  • Patent number: 5895511
    Abstract: A method of producing a resilient decorative construction material from waste products such as slag granulate or waste glass granulate is taught. The waste glass granulate may contain paper, adhesives, plastic, or other contaminants. The construction material may be in the shape of a tile and used in interior or exterior applications. A layer of material comprising glass granulate, slag granulate, or sand, or mixtures thereof, is placed in a heat-resistant mold. The layer has first and second surfaces. The layer is thermally treated, and is initially heated so that a temperature gradient is established throughout the layer, with the first surface having a first temperature no greater than the softening point, and the second surface having a second temperature less than the first temperature. These temperatures are held for a period of time, and the layer subjected to further heating.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: April 20, 1999
    Assignee: Futuristic Tile, L.L.C.
    Inventor: Nailia A. Tikhonova
  • Patent number: 5873922
    Abstract: Lines are scribed on glass panes in accordance with the sections to be produced and the glass panes are then broken into sections susbtantially in a vertical position. A device suitable therefor comprises a station (2) for scribing the glass panes (1) with a substantially vertical supporting surface (25) and a conveyor (13) at its lower edge. Adjoining the station (2) is a first breaking station (3) and second one (4) in which the X-notches are opened and frontal edge sections (XR) are separated. The sections (27) of glass panes (1) thus obtained are turned through 90.degree. about the axis perpendicular to the supporting surface (25) in a turning station (5). The Y notches are broken in another breaking station (8). After any edge strips (XR) and residual pieces (R) have been removed, the sections thus obtained are inserted directly into a device (12) for their intermediate storage or fed to a double-glazing line.
    Type: Grant
    Filed: July 8, 1997
    Date of Patent: February 23, 1999
    Inventor: Peter Lisec
  • Patent number: 5866062
    Abstract: A shaped body of amorphous silicon dioxide, which has a chemical purity of at least 99.9% and a cristobalite content of at most 1% and which is impermeable to gas, is known. To provide shaped bodies of amorphous silicon dioxide which have a high precision, which can be small or large in size and of simple to complicated shape, which have a chemical purity of at least 99.9%, are impermeable to gas above wall thicknesses of 1 mm, which have a high cold flexural strength, low thermal conductivity and low radiation of heat, which are thermal shock resistant and can be exposed repeatedly or also long-term to temperatures in the range from 1000.degree. to 1300.degree. C. and which can be welded in a sharply delineated manner without spreading joins and which have a low spectral transmission from the ultraviolet to the middle infrared spectral region, the shaped body is opaque, contains pores, at a wall thickness of 1 mm has a direct spectral transmission which is virtually constant in the wavelength range from .
    Type: Grant
    Filed: March 11, 1997
    Date of Patent: February 2, 1999
    Assignee: Heraeus Quarzglas GmbH
    Inventors: Stephan Moritz, Wolfgang Englisch
  • Patent number: 5820647
    Abstract: A process for producing stained crystallized glass and its articles which is characterized in meeting production of various crystallized glass articles in small quantity. By this process, crystallized glass is obtained with patterns and colors alike to that of granites, marble, and other natural stones. The process of heat-treatment to a prepared batch compounded of crystallizable glass granules, color powder and water at a temperature higher than the softening point thereof results in fusion bonding of the glass granules. The color powder is compounded by inorganic pigment, suspension stabilizing agent, agglomerant, deflocculant agent, and crystallizable glass powder. The surface pattern is formed by grain boundary part of crystallizable glass granules, and part of the inorganic pigment in the color powder moving with the crystallizable glass powder.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: October 13, 1998
    Inventors: Kuo-chuan Hsu, Ching-hsi Lin, Hsien-Chung Tsai
  • Patent number: 5766291
    Abstract: A porous silica body with a density of 0.1 g/cm.sup.3 to 0.5 g/cm.sup.3 and a density variation of less than 30% is subjected to a first heat-treatment in an ammonia-containing atmosphere, a second heat-sintering in non-oxidizing atmosphere, and further heat-treatment at a temperature in the range of 1400.degree. C. to 2000.degree. C. under an increased pressure of 500 kg/cm.sup.2 or more in a non-oxidizing atmosphere.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: June 16, 1998
    Assignee: Heraeus Quarzglas GmbH
    Inventors: Tatsuhiro Sato, Akira Fujinoki
  • Patent number: 5704959
    Abstract: The invention relates to a device for dividing laminated glass, especially two-pane laminated glass, comprising two, plate-shaped supports for the glass sheet in which one of the supports is rigidly attached in the machine from and the other support is mounted to swivel around a horizontal axis located in the area between the supports. Cutting tools can be moved in the abutting area between the two supports for scratching the laminated glass on both sides. A blade used for splitting the plastic film located between the two glass panes is mounted on a holder slide which can swivel around a horizontal axle which is aligned in a direction of movement of the holder slide.
    Type: Grant
    Filed: February 5, 1996
    Date of Patent: January 6, 1998
    Inventor: Peter Lisec
  • Patent number: 5676720
    Abstract: A glass material is formed from SiO.sub.2, CaO, Na.sub.2 O and P.sub.2 O.sub.5 and the porous, non-crystalline structure is most preferably created by melting the constituents, cooling and pulverizing the resulting glass, and then forming and hot pressing the powder. The glass of the present invention may be formed to produce templates that are useful for various indications, as well as granules that may be formed into a paste.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: October 14, 1997
    Assignee: The Trustees of the University of Pennsylvania
    Inventors: Paul Ducheyne, Ahmed El-Ghannam, Irving Shapiro
  • 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: 5668067
    Abstract: The invention relates to the production of high purity fused silica glass which is highly resistant to optical damage by ultraviolet radiation in the laser wavelength of about 300 nm or shorter. In particular, this invention relates to a fused silica optical member or blank which exhibits substantially no optical damage up to 10.sup.7 pulses (350 mJ/cm.sup.2) at the KrF laser wavelength region of about 248 nm, and at the ArF laser wavelength region of about 193 nm.
    Type: Grant
    Filed: August 19, 1996
    Date of Patent: September 16, 1997
    Assignee: Corning Incorporated
    Inventors: Roger J. Araujo, Nicholas F. Borrelli, Christine L. Hoaglin, Charlene Smith
  • Patent number: 5665133
    Abstract: Pure transparent quartz glass is provided by molding powdery amorphous silica into an article, converting the molded powdery amorphous silica into crystalline silica of high-temperature type cristobalite structure, and then fusing the crystalline silica, the quartz glass containing impurities respectively at a content of not higher than 1 ppm, and an OH group at a content of not higher than 20 ppm, and having a viscosity of 10.sup.12.0 poise or more at 1200.degree. C. The quartz glass is transparent and has high purity, and is excellent in high temperature viscosity characteristics. The quartz glass can be produced at a low cost.
    Type: Grant
    Filed: October 10, 1995
    Date of Patent: September 9, 1997
    Assignees: Tosoh Corporation, Nippon Silica Glass Co., Ltd.
    Inventors: Koichi Orii, Yukinobu Hara, Tomoyuki Akiyama, Koji Tsukuma, Yoshikazu Kikuchi
  • Patent number: 5641333
    Abstract: A method for forming a GeO.sub.2 -doped SiO.sub.2 glass article by depositing glass particles to form a porous preform and then drying and sintering the porous preform. A precursor of SnO.sub.2 is also present in the reactant stream used to form the particles, whereby the reaction produces particles of glass that contain GeO.sub.2, SiO.sub.2 and SnO.sub.2. The presence of SnO.sub.2 in the particles reduces the reaction of GeO.sub.2 with chlorine to form GeCl.sub.4 during the drying step. The GeCl.sub.4 that would have formed would have either escaped from the porous preform or caused GeO.sub.2 to be re-deposited in an undesirable portion of the preform. The retention of GeO.sub.2 in the article is therefore enhanced.
    Type: Grant
    Filed: December 1, 1995
    Date of Patent: June 24, 1997
    Assignee: Corning Incorporated
    Inventors: Gerald E. Burke, Carlton M. Truesdale
  • Patent number: 5630857
    Abstract: A method of manufacturing an optical device having a profile of refractive indices along its optical axis. A desired volume of each of a plurality of types of optical material are dispensed into a mold of known plan area in the form of a frit or a melt and the mold is heated to cause the materials to melt and fuse together to define a contiguous body of optical material having a desired profile. As the optical materials melt, the different types of material separate out so that they are arranged with the most dense material closest to the bottom of the mold and the least dense material closest to the top of the mold. To enhance this effect, the optical materials are layered in the mold in decreasing order of density of the materials from the bottom to the top so that the layers of optical material with the greater densities are closer to the bottom of the mold than the layers of materials with lesser densities.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: May 20, 1997
    Assignee: Lightpath Technologies, Inc.
    Inventors: Xiaojie Xu, Michael E. Savard
  • Patent number: 5616159
    Abstract: High purity fused silica glass which is highly resistant to optical damage by ultraviolet radiation in the laser wavelength of about 300 nm or shorter is produced. In particular, a fused silica optical member or blank exhibits substantially no optical damage up to 10.sup.7 pulses (350 mJ/cm.sup.2) at the KrF laser wavelength region of about 248 nm, and at the ArF laser wavelength region of about 193 nm.
    Type: Grant
    Filed: April 14, 1995
    Date of Patent: April 1, 1997
    Assignee: Corning Incorporated
    Inventors: Roger J. Araujo, Nicholas F. Borrelli, Christine L. Hoaglin, Charlene Smith
  • Patent number: 5607492
    Abstract: Disclosed is a nonfull aperture Luneburg-type lens for correction of an adjacent light source. The lens includes a core having a circular cross-section and a graded refractive index, and a cladding enclosing the core. The cladding has a circular cross-section and a homogenous refractive index. Also disclosed is a method for forming the nonfull aperture Luneburg-type lens with a graded index core and a homogenous cladding, and a high numerical aperture laser diode assembly including the nonfull aperture Luneburg-type lens.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: March 4, 1997
    Assignee: Institut National D'Optique
    Inventor: Sead Doric
  • Patent number: 5585173
    Abstract: The high-purity, opaque quartz glass containing 3.times.10.sup.6 -9.times.10.sup.6 of closed cells having an average size of 20-40 .mu.m per 1 cm.sup.3, a ratio of closed cells having sizes of 100 .mu.m or more to the whole of cells being 1% or less, thereby showing 5% or less of linear transmittance for near infrared rays (.lambda.=900 nm) at a thickness of 1 mm is produced by compacting amorphous silica powder having an average particle size of 0.5-10 .mu.m, in which each of impurities selected from Li, Na, K, Fe, Ti and Al is 1 ppm or less, if any, and sintering the resultant green body at 1730.degree.-1850.degree. C.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: December 17, 1996
    Assignees: Tosoh Corporation, Nippon Silica Glass Co., Ltd.
    Inventors: Kenji Kamo, Kouichi Ono, Koji Tsukuma, Hiroya Nagata, Emiko Abe, Yoshikazu Kikuchi, Yushiharu Funakoshi
  • Patent number: 5547482
    Abstract: This invention is directed to the production of essentially defect-free high purity fused silica glass articles, the method comprising the following steps: (a) forming a green body from silica particulates or a porous body of amorphous silica; (b) sintering said body in a chamber by raising the temperature of the chamber to above 1720.degree. C., while purging the chamber with helium or applying a vacuum to the chamber; and (c) consolidating the sintered body in a chamber by raising the temperature within the chamber to at least 1750.degree. C., introducing an inert gas into the chamber at a pressure less than about 6.9 MPa (1000 psig), and cooling the chamber while maintaining the pressurized atmosphere to a temperature at least below the annealing point of the glass. In the most preferred practice, a green body of silica particulates will be prepared via a sol-gel process.
    Type: Grant
    Filed: July 5, 1994
    Date of Patent: August 20, 1996
    Inventors: Julie B. Chalk, Jonathan C. Rowe, Paul M. Schermerhorn, Robert D. Shoup
  • Patent number: 5525137
    Abstract: A method for producing bas-relief stained glass comprises the steps of providing glass ground to a powder. The powdered glass is mixed with a vehicle to produce a paste which is applied to a sheet of glass. The applied layer of paste forms a design on the sheet of glass and has a raised appearance relative to the sheet of glass. The sheet of glass is heated for a period of time at a temperature high enough to bond the powdered glass paste to the sheet of glass, but low enough to prevent permanent deformation of the sheet of glass and to maintain the design formed by the paste on the sheet of glass.
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: June 11, 1996
    Assignee: Leonard DiCarlo
    Inventor: Leonard J. DiCarlo
  • Patent number: 5411563
    Abstract: A method for preparing strengthened ceramic/glass substrates by laminating and sintering multiple layers of ceramic/glass precursory substrates having different thermal expansion coefficients, with the inner layer having higher thermal expansion coefficient and the outer layers having lower thermal expansion coefficient. After the sintered substrates are cooled, a compressive stress will be permanently imparted in the sintered substrates which will be exerted onto the surface layer thereof. Such a compressive stress has the effect of impeding the growth of any defects and thus provides the strengthening effect. The method disclosed in the present invention can be used to strengthen ceramic/glass substrates that contain electronic parts or conductor circuits.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: May 2, 1995
    Assignee: Industrial Technology Research Institute
    Inventors: Tsung-Shou Yeh, Jane-Chyi Lin, Shiang-Po Hwang
  • Patent number: 5411565
    Abstract: In order to fabricate strip monomode active optical waveguides for optical elecommunications, a layer of vitreous soot is deposited on a substrate and is impregnated with a solution of a precursor of a rare-earth dopant, and a radiation with a wavelength comprised in an absorption band of the dopant is moved along the soot, along a trajectory corresponding to the geometrical shape desired for the guide, thereby forming a vitrified strip.
    Type: Grant
    Filed: August 6, 1993
    Date of Patent: May 2, 1995
    Assignees: SIP - Societa Italiana per L-Esbercizio Delle Telecommunicazioni P.A., Sirti S.p.A.
    Inventors: Livio Cognolato, Angelantonio Gnazzo
  • Patent number: 5352259
    Abstract: The present invention provides a method of manufacturing an optical fiber preform having the steps of disposing a rod member made of a silica-based material within a cavity of a mold, followed by loading a molding material within the mold cavity, and applying pressure to the mold from the outside to form a porous layer on the surface of the rod member and, thus, to obtain a porous preform, wherein at least one end portion of the rod member extends outside the mold cavity in the step of applying pressure to the mold. The particular method permits manufacturing a high quality porous preform free from splits or cracks, making it possible to obtain a high quality optical fiber preform free from residual bubbles.
    Type: Grant
    Filed: January 28, 1993
    Date of Patent: October 4, 1994
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Masato Oku, Noritsugu Enomoto, Hiroshi Hihara, Tsuguo Sato, Kazuaki Yoshida, Takayuki Morikawa, Takeshi Yagi
  • Patent number: 4828900
    Abstract: Glass shapes and sheets are cut directly from a heated glass ribbon while maintaining the optical quality of the cut glass. A float glass ribbon is removed from a glass forming chamber and prior to annealing, a line of cut is heated to its softening temperature. A blade arrangement thereafter penetrates the glass along the heated line of cut to sever the glass. The cut glass edge is shaped after cutting while the edge is still at the softening temperature. Duuring the line heating and cutting operation, the overall glass temperature is maintained above the strain point of the glass.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: May 9, 1989
    Assignee: PPG Industries, Inc.
    Inventor: Raymond J. Mouly
  • Patent number: 4743284
    Abstract: A sliding support table to support a continuously advancing glass ribbon during severing. The ribbon is supported by and moves over the sliding support table which moves along the direction of the glass ribbon travel between stationary upstream and downstream supports. Top and bottom line heaters supported on the table direct flames towards the major surfaces of the glass ribbon along a line cut. A blade and anvil arrangement supported on the table, sever the glass along the heated line of cut when the line of cut is positioned therebetween. The table advances along with the glass ribbon to support the ribbon during the heating and severing operation. The line heaters and blade and anvil arrangement may provide both a linear or nonlinear line of cut.
    Type: Grant
    Filed: December 29, 1986
    Date of Patent: May 10, 1988
    Assignee: PPG Industries, Inc.
    Inventors: Raymond J. Mouly, Dewitt W. Lampman
  • Patent number: 4698088
    Abstract: A glass plate fabrication machine under automatic control comprises a work table moving linearly along the direction of feeding glass plates, a block moving linearly in the direction in perpendicular to the linear moving direction of the work table, a grinding station disposed to the block by means of a rotating device that rotates around an axis, as the center, vertical to each of the linear moving directions of the work table and the block, a cutting station disposed along with the line in parallel with the linear moving direction of the work table passing through the center of the axis for the rotating device on the block, a glass plate fixing block and a glass plate cutting table disposed on the work table at the positions corresponding to the grinding station and the cutting station respectively, and a cracking station supported on a machine base above the linearly moving work table between the grinding station and the cutting station for raising and cracking the glass plate.
    Type: Grant
    Filed: September 30, 1986
    Date of Patent: October 6, 1987
    Assignee: Bando Kiko Co., Ltd.
    Inventor: Shigeru Bando