With Severing Or Perforating Patents (Class 65/97)
  • Patent number: 10040713
    Abstract: A method for producing a glass film is provided. The method includes: heating a portion of a glass preform so that in the heated portion the glass has a viscosity of less than 109 dPa·s, or drawing a glass from a melt; withdrawing the glass using a drawing device, wherein in case of drawing from a preform the drawn glass film is thinner than the glass preform; heating at least one point by means of a laser, the point being located in an edge region of the drawn glass film that is being formed by withdrawing the glass, wherein at the site of the laser focus the glass has a viscosity of not more than 109 dPa·s before the laser is switched on and wherein heating is performed in such a manner that at least one notch is provided in parallel to the drawing direction.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: August 7, 2018
    Assignee: SCHOTT AG
    Inventors: Bernhard Hunzinger, Doris Moseler, Frank Buellesfeld, Ulrich Lange
  • Patent number: 9399593
    Abstract: A method of forming a glass article includes drawing a glass ribbon from a draw housing in a downstream direction, heating portions of only a bead of the glass ribbon to form compressive stress regions in the bead, scoring the glass ribbon to form a score line on which the glass ribbon is broken. The bead is heated at a position upstream from the score line. An apparatus for manufacturing a glass article includes a draw housing for forming a glass ribbon having a bead, a heating apparatus with a heat source for forming compressive stress regions in portions of only the bead of the glass ribbon, and a scoring apparatus that forms a score line on which the glass ribbon is broken to form the glass article. The heat source moves downstream simultaneously with the glass ribbon.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: July 26, 2016
    Assignee: CORNING INCORPORATED
    Inventors: Anatoli Anatolyevich Abramov, Steven Roy Burdette, Priyank Paras Jain, Jingru Zhang, Rui Zhang
  • Patent number: 9027815
    Abstract: Apparatus and equipment for making glass sheet from a glass ribbon including scoring, bending and separation in vertical state with improved glass ribbon stability provided by edge restrainers located above the score-line that also travel with substantially the same vertical velocity with the elastic ribbon. The edge restrainers on both sides of the glass ribbon serve to limit the motion and perturbation of the ribbon during scoring, bending and separation, advantageously by tensioning the glass ribbon where needed. The invention can reduce disturbance of the glass ribbon in upstream visco-elastic and/or viscous zones due to scoring, bending and separation, therefore enhance forming process stability and product attributes such as thickness variation, stress and stress variation, and the like. The invention can be particularly advantageous for making glass sheet with large width and/or low thickness using the fusion down-draw, slot down-draw, re-draw down-draw, and other down-draw processes.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: May 12, 2015
    Assignee: Corning Incorporated
    Inventors: Gautam Narendra Kudva, Liming Wang, Wei Xu, Naiyue Zhou
  • Patent number: 9010151
    Abstract: A glass sheet cutting device fuses and divides a glass substrate using a preset cutting line as a boundary while supplying an assist gas and a laser beam from above the glass substrate along the preset cutting line of the glass substrate. The glass sheet cutting device includes a first laser irradiator for radiating a fusing laser beam and a second laser irradiator for radiating an annealing laser beam. Through a fusing gap formed between fused end surfaces by fusing, the second laser irradiator radiates the annealing laser beam obliquely from above onto the fused end surface to be annealed.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: April 21, 2015
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Takahide Fujii, Setsuo Uchida, Naotoshi Inayama, Takayuki Noda, Sho Itoh, Michiharu Eta
  • Publication number: 20150096330
    Abstract: A glass manufacturing apparatus comprises a forming device configured to produce a glass ribbon and a control device configured to independently operate a first pull roll apparatus, a second pull roll apparatus, and a third pull roll apparatus such that at least one of a first upstream pair of draw rolls rotates with a substantially constant torque, at least one of a first midstream pair of draw rolls rotates with a substantially constant torque, and at least one of a first downstream pair of draw rolls rotates with a substantially constant angular velocity. In further examples, methods of manufacturing a glass ribbon are provided.
    Type: Application
    Filed: October 4, 2013
    Publication date: April 9, 2015
    Applicant: Corning Incorporated
    Inventors: Tomohiro Aburada, Steven Roy Burdette, Masumi Kihata, Chris Scott Kogge, Gautam Narendra Kudva, Michael Yoshiya Nishimoto, Gary Graham Squier, David John Ulrich
  • Patent number: 8978417
    Abstract: Disclosed is a method of separating a glass sheet from a moving glass ribbon, wherein the glass ribbon comprises thickened bead portions. The method comprises weakening the bead portions of the ribbon using laser-initiated ablation at the bead portions to overcome the potential for uncontrolled cracking through the bead portion.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: March 17, 2015
    Assignee: Corning, Incorporated
    Inventors: Anatoli A. Abramov, Jae H. Yu, Naiyue Zhou
  • Patent number: 8950217
    Abstract: A method of cutting an object to be processed comprises the steps of irradiating an object to be processed with a laser light which is an elliptically-polarized light having an ellipticity other than 1 such that a direction of polarization of the laser light intersects a line to cut the object and a thickness direction of the object, while locating a converging point of the laser light within the object, so as to form a modified region within the object along the line and generate a fracture from the modified region in the thickness direction of the object, and causing the fracture to reach front and rear faces of the object so as to cut the object along the line.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: February 10, 2015
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Hiroyuki Iwaki, Takafumi Ogiwara, Takeshi Sakamoto, Masaharu Hoshikawa, Kazuhiro Atsumi, Daisuke Kawaguchi, Takafumi Tsunematsu
  • Patent number: 8943855
    Abstract: A method of cutting an article (172) from a chemically strengthened glass substrate (110) includes generating a pulsed laser beam (108) from a laser source (106). The pulsed laser beam (108) may have a pulse duration of less than about 1000 fs and an output wavelength such that the chemically strengthened glass substrate (110) is substantially transparent to the pulsed laser beam (108). The pulsed laser beam (108) may be focused to form a beam waist (109) that is positioned in the same horizontal plane as an inner tensile region (124) of the chemically strengthened glass substrate (110). The beam waist (109) may be translated in a first pass along a cut line (116), wherein the beam waist (109) traverses an edge (111) of the chemically strengthened glass substrate. The beam waist (113) may then be translated in a second pass along the cut line (116) such that a crack (119) propagates from the edge (113) along the cut line (116) ahead of the translated beam waist (109) during the second pass.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: February 3, 2015
    Assignee: Corning Incorporated
    Inventors: Sinue Gomez, Lisa Anne Moore, Sergio Tsuda
  • Patent number: 8935942
    Abstract: Provided is a manufacturing device (1) of a glass film, the device including: a forming apparatus (10) of a glass film ribbon (G) for forming molten glass or a glass base material for secondary processing into a glass film ribbon (G); a winding apparatus (20) for winding, into a roll shape, the glass film ribbon (G), which is drawn downward while being cooled; and a width direction cutting apparatus (30) for cutting the glass film ribbon (G) along its width direction at a position before being wound by the winding apparatus (20). A vertical distance (h) from the glass film ribbon (G) forming start position by the forming apparatus (10) to a glass film ribbon (G) cutting position by the width direction cutting apparatus (30) is set as five times or more of a dimension in the width direction of the glass film ribbon (G).
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: January 20, 2015
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventor: Michiharu Eta
  • Publication number: 20150002932
    Abstract: Invention relates to lenticular sheets made of thermally or chemically hardened mineral glass used for decorative panels, to create three-dimensional visual effects combined with an encoded image. One of the advantages of invention is the fact that it is a proposed mineral lenticular sheet, which underwent chemical or mechanical hardening of its outer parts 18. This increases the mechanical strength and impact resistance. This aspect makes it safer for use under the influence of external factors and in contact with a person. This allows for applying the invention in large scopes in comparison with plastic lenticular screens. Pre-stressing is achieved by thermal or chemical hardening.
    Type: Application
    Filed: January 31, 2013
    Publication date: January 1, 2015
    Inventors: Denys Bityutskyy, Andrii Karlov, Ievegen Viunskovskyi, Roman Kulniev
  • 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
  • Patent number: 8887530
    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: Grant
    Filed: June 20, 2014
    Date of Patent: November 18, 2014
    Assignee: Corning Incorporated
    Inventors: Shawn Rachelle Markham, Jae Hyun Yu
  • Publication number: 20140264356
    Abstract: Described herein are aluminoborosilicate glass compositions that are substantially alkali-free and exhibit desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs). The glass compositions can be formed into glass sheets by, for example, the float process. When used as substrates, the glass sheets exhibit dimensional stability during processing and damage resistance during cutting.
    Type: Application
    Filed: March 11, 2014
    Publication date: September 18, 2014
    Applicant: Corning Incorporated
    Inventor: Adam James Ellison
  • Publication number: 20140216108
    Abstract: A method for separating a thin glass sheet, such as a glass film along a predefined cutting line provides the cutting line immediately has a temperature of greater than 250 K below the transformation point Tg of the glass of the thin sheet of glass, including the input of energy along the cutting line using a laser beam which acts such that a separation of the thin glass sheet occurs.
    Type: Application
    Filed: April 7, 2014
    Publication date: August 7, 2014
    Applicant: SCHOTT AG
    Inventors: Thomas Wiegel, Jürgen Vogt, Andreas Habeck, Georg Sparschuh, Holger Wegener, Gregor Kübart, Angelika Ullmann
  • Patent number: 8794036
    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: Grant
    Filed: November 23, 2011
    Date of Patent: August 5, 2014
    Assignee: Corning Incorporated
    Inventors: Shawn R. Markham, Jae H. Yu
  • Patent number: 8776549
    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: Grant
    Filed: September 3, 2008
    Date of Patent: July 15, 2014
    Assignee: Grenzebach Maschinenbau GmbH
    Inventor: Edwin Lang
  • Patent number: 8769989
    Abstract: A cleaving apparatus holds at least one surface (effective surface) of a band-like glass film in a non-contact state to suppress a situation that wavy portions reach a region in which the band-like glass film is to be cleaved. The cleaving apparatus cleaves the band-like glass film, which is being conveyed in a longitudinal direction thereof, along a conveyance direction thereof using a thermal stress generated through localized heating and cooling of a heated region. The localized heating and the cooling is performed on a preset cleaving line extending along the conveyance direction of the band-like glass film. The cleaving apparatus includes an air knife for supplying air to a front surface of the band-like glass film to retain the film on a conveyor at a position on an upstream side of a cleaving region in the conveyance direction.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: July 8, 2014
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Kaoru Mitsugi, Naohiro Ikai, Hiroshi Adachi, Hiroki Mori
  • Publication number: 20140182338
    Abstract: Disclosed is a method of separating a glass sheet from a moving glass ribbon, wherein the glass ribbon comprises thickened bead portions. The method comprises weakening the bead portions of the ribbon using laser-initiated ablation at the bead portions to overcome the potential for uncontrolled cracking through the bead portion.
    Type: Application
    Filed: March 7, 2014
    Publication date: July 3, 2014
    Applicant: Corning Incorporated
    Inventors: Anatoli A. ABRAMOV, Jae H. YU, Naiyue ZHOU
  • Patent number: 8733130
    Abstract: A process for coating a ribbon of float glass is disclosed. It comprises the steps of forming a glass ribbon, depositing a first transparent conductive coating upon a major surface of the ribbon which does not extend to the edges of the ribbon while the ribbon is at an elevated temperature, cooling said coated ribbon under controlled conditions in an annealing lehr and cutting off the edges of the ribbon so as to produce a ribbon having a uniform coating extending across the full width of the cut ribbon which is characterized in that a second conductive coating is deposited upon the uncoated edges of the ribbon while that edge is at a temperature which is above the ambient temperature. The invention finds particular application in the production of coated glass products where the thickness of the glass ribbon is at least 8 mm and most particularly where the thickness of the glass is at least 10 mm.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: May 27, 2014
    Assignee: Pilkington Group Limited
    Inventors: Kevin Sanderson, Gerhard Lingl, Hans-Eckhard Leitl, Franz Michael Josef Scharnagl, Douglas M Nelson
  • Publication number: 20140130552
    Abstract: Methods and apparatuses for separating sheets of brittle material are disclosed. According to one embodiment, a separation apparatus for separating a sheet of brittle material includes a first separation cam positioned adjacent to a sheet conveyance pathway and a second separation cam positioned opposite from and downstream of the first separation cam. The first and second separation cams may be rotated such that the contact faces of the separation cams periodically extend across a centerline of the conveyance pathway. Rotation of the first and second separation cams may be synchronized such that at least the portion of the contact face of the first separation cam and at least the portion of the contact face of the second separation cam periodically extend across the centerline of the conveyance pathway at a separation time and periodically do not extend across the centerline of the conveyance pathway at a non-separation time.
    Type: Application
    Filed: November 15, 2012
    Publication date: May 15, 2014
    Inventors: Keith Mitchell Hill, Ritesh Satish Lakhkar, Mark Thomas Massaro, Liming Wang, Naiyue Zhou
  • Patent number: 8720228
    Abstract: Methods of separating a strengthened glass substrate having a compressive surface layer and an inner tension layer include translating a laser beam on a surface of the strengthened glass substrate along a line of desired separation from a first edge of the strengthened glass substrate toward a second edge of the strengthened glass substrate. Methods further include backward-propagating a controlled full-body crack within the strengthened glass substrate from the second edge toward the first edge substantially along the line of desired separation. A scribe line may be formed on a surface of the strengthened glass substrate such that the strengthened glass substrate self-separates along the scribe line. A residual stress field may be created within the strengthened glass substrate such that a full-body crack backward-propagates from an exit defect located at the second edge toward the first edge along a line of desired separation, thereby separating the strengthened glass substrate.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: May 13, 2014
    Assignee: Corning Incorporated
    Inventor: Xinghua Li
  • 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
  • Patent number: 8677783
    Abstract: Disclosed is a method of separating a glass sheet from a moving glass ribbon, wherein the glass ribbon comprises thickened bead portions. The method comprises weakening the bead portions of the ribbon using laser-initiated ablation at the bead portions to overcome the potential for uncontrolled cracking through the bead portion.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: March 25, 2014
    Assignee: Corning Incorporated
    Inventors: Anatoli A. Abramov, Jae H. Yu, Naiyue Zhou
  • Publication number: 20140060117
    Abstract: A method for manufacturing a glass substrate for magnetic disk, the internal strain of which is reduced without performing annealing treatment, is provided. The method includes a forming process of forming a plate-shaped glass blank by pressing a lump of molten glass using a pair of dies, wherein the method includes: a removing process of removing at least a part of a residual stress layer formed on the principal face of the glass blank press-formed in the forming process; and a process of forming a donut-shaped glass substrate by subjecting the glass blank after the removing process to machining.
    Type: Application
    Filed: May 23, 2012
    Publication date: March 6, 2014
    Applicant: HOYA CORPORATION
    Inventors: Hideki Isono, Hidekazu Tanino, Akira Murakami, Takashi Sato, Masamune Sato
  • Patent number: 8656738
    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: Grant
    Filed: October 31, 2008
    Date of Patent: February 25, 2014
    Assignee: Corning Incorporated
    Inventors: Michael Albert Joseph, II, Steven Edward DeMartino
  • Publication number: 20130319050
    Abstract: A glass manufacturing apparatus is described herein that comprises a forming device configured to produce a glass ribbon and a pull roll device which draws the glass ribbon downward from the forming device. The pull roll device has a first roll apparatus, a second roll apparatus, and a third roll apparatus. The pull roll device is configured to at least independently operate the first roll apparatus and the second roll apparatus such that at least one of a first upstream pair of draw rolls rotates with a substantially constant torque and at least one of a first downstream pair of draw rolls rotates with a substantially constant angular velocity. In further examples, methods of manufacturing a glass ribbon are provided.
    Type: Application
    Filed: May 29, 2013
    Publication date: December 5, 2013
    Applicant: Corning Incorporated
    Inventors: Anmol Agrawal, Steven Roy Burdette, Gautam Narendra Kudva, Michael Yoshiya Nishimoto, Vinay Patel
  • Publication number: 20130291596
    Abstract: Methods and apparatus for manufacturing high purity polysilicon. The apparatus includes a vacuum chamber; first and second electron guns disposed at an upper side of the vacuum chamber to irradiate electron beams into the vacuum chamber; a silicon melting unit which is placed on a first electron beam-irradiating region corresponding to the first electron gun and to which powdery raw silicon is fed and melted by the first electron beam; and a unidirectional solidification unit placed on a second electron beam-irradiating region corresponding to the second electron gun. The unidirectional solidification unit is provided therein with a start block driven in a downward direction to transfer molten silicon in the downward direction and is formed at a lower side thereof with a cooling channel. The start block includes a dummy bar having a silicon button joined to an upper portion of the dummy bar.
    Type: Application
    Filed: May 4, 2012
    Publication date: November 7, 2013
    Applicant: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Bo Yun Jang, Jin Seok Lee, Joon Soo Kim, Young Soo Ahn
  • Patent number: 8539795
    Abstract: Methods for cutting a fragile material are provided. The methods comprise the step of heating the fragile material along a separation path to separate the fragile material into a first portion and a second portion. At least the first portion includes a first thermal affected zone extending along the separation path. The methods further include the steps of spontaneously splitting at least part of the first thermal affected zone from the remainder of the first portion along a first split path extending a first distance from the separation path. The spontaneous splitting occurs as a consequence of the step of heating the fragile material.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: September 24, 2013
    Assignee: Corning Incorporated
    Inventors: Thierry Luc Alain Dannoux, Philippe Lehuede
  • Publication number: 20130233019
    Abstract: Methods are disclosed for treating zircon-containing forming structures, e.g., zircon isopipes, with one or more treatment glass compositions in which defect-causing reactions between the zircon of the forming structure and molten glass are suppressed at the delivery temperature of the treatment glass. The treatment compositions can be used during start-up of a forming structure, between runs of the same production glass on a given forming structure, and/or when transitioning between runs of two production glasses on a given forming structure. The treatment compositions can be used with production glasses that are ion-exchangeable.
    Type: Application
    Filed: March 12, 2012
    Publication date: September 12, 2013
    Inventors: Adam J. Ellison, Timothy J. Kiczenski, John C. Mauro
  • Publication number: 20130133371
    Abstract: A glass manufacturing apparatus comprises a forming device configured to produce a glass ribbon and a control device configured to independently operate a first pull roll apparatus and a second pull roll apparatus such that at least one of a first upstream pair of draw rolls rotates with a substantially constant torque and at least one of a first downstream pair of draw rolls rotates with a substantially constant angular velocity. In further examples, methods of manufacturing a glass ribbon are provided.
    Type: Application
    Filed: November 29, 2011
    Publication date: May 30, 2013
    Inventors: Steven Roy Burdette, Liam Ruan de Paor, Gautam Narendra Kudva, Gary Graham Squier, David John Ulrich
  • Publication number: 20130133367
    Abstract: Disclosed is a method of separating a glass sheet from a moving glass ribbon, wherein the glass ribbon comprises thickened bead portions. The method comprises weakening the bead portions of the ribbon using laser-initiated ablation at the bead portions to overcome the potential for uncontrolled cracking through the bead portion.
    Type: Application
    Filed: November 28, 2011
    Publication date: May 30, 2013
    Inventors: Anatoli A. Abramov, Jae H. Yu, Naiyue Zhou
  • Publication number: 20130042649
    Abstract: A manufacturing method of a glass blank for magnetic disk including a pair of principal surfaces, the method including: dropping process for dropping a lump of molten glass; pressing process for forming a sheet glass material by sandwiching simultaneously the lump from both sides of the dropping path of the lump with surfaces of the pair of dies facing together, and performing press forming to the lump; and temperature adjusting process for adjusting temperature of the lump before the pressing process such that viscosity variation of the lump is reduced with respect to positions over the entirety of the lump in the pressing process.
    Type: Application
    Filed: February 15, 2012
    Publication date: February 21, 2013
    Applicant: HOYA CORPORATION
    Inventors: Hideki ISONO, Akira Murakami, Shinji Eda
  • Publication number: 20120304695
    Abstract: A process and apparatus for precision glass roll forming a supply of molten glass at a glass temperature of 1000° C. or higher. A pair of hot forming rolls having a surface temperature of about 500° C. or higher, vertically below the glass feed, that thin the supplied stream of molten glass to produce a formed glass ribbon. A pair of cold sizing rolls maintained at a surface temperature of about 400° C. or lower, vertically below the forming rolls, that thin the formed glass ribbon glass to produce a sized glass ribbon having a desired thickness and a desired thickness uniformity. The sized glass ribbon may have a thickness of 1 mm or less that varies in thickness by no more than +/?0.025 mm.
    Type: Application
    Filed: May 30, 2012
    Publication date: December 6, 2012
    Inventors: Alexander Lakota, William E. Lock, Joel A. Schultes, John C. Thomas
  • Patent number: 8312741
    Abstract: In a cleaving apparatus for a glass film, an initial crack, which is formed at a leading end portion of a preset cleaving line of a glass film, is propagated along the preset cleaving line by a thermal stress generated in the glass film through localized heating performed along the preset cleaving line and cooling of a heated region resulting from the localized heating. At this time, a resin sheet having higher flexibility than the glass film is arranged in a cleaving region, and the resin sheet is floated by blowing a gas on a lower surface of the resin sheet by a floating unit. Then, a preset cleaving portion of the glass film including the preset cleaving line is lifted and supported while being covered with the floated resin sheet from below, and in this state, the glass film is cleaved.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: November 20, 2012
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Yasuo Teranishi, Yasuhiro Matsumoto, Taiki Minari, Takaya Furuta
  • 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: 20120144865
    Abstract: The present invention provides a manufacturing method of a sheet glass material excellent in flatness. A manufacturing method of glass substrate for magnetic disk including a pair of principal surfaces, the method comprising the steps of: dropping process for dropping a lump of molten glass; pressing process for forming a sheet glass material by performing press forming to the lump while sandwiching the lump from both sides of the dropping path of the lump with facing surfaces of a pair of dies, the pair of dies being set to substantially the same temperature; and processing process for processing the sheet glass material, while the lump drops down while revolving around its dropping axis.
    Type: Application
    Filed: December 7, 2011
    Publication date: June 14, 2012
    Applicant: HOYA CORPORATION
    Inventors: Shinji EDA, Hideki Isono, Akira Murakami
  • 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
  • Patent number: 8146386
    Abstract: A scoring device is described herein that applies a constant force while scoring a piece of material so that there is a consistent score quality (or vent depth) within the scored piece of material. In one embodiment, the piece of material is a bowed shaped glass sheet that is supported by a conformable nosing device which has been configured to have a bowed shape that substantially matches the bowed shape of the glass sheet.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: April 3, 2012
    Assignee: Corning Incorporated
    Inventors: Mohamed Dahroug, Scott Winfield Deming, Michael Albert Joseph, II, Thomas Achille Yorio, Naiyue Zhou
  • Patent number: 8146385
    Abstract: Methods for separating glass sheets from glass ribbons are disclosed. One method includes forming a glass ribbon having a curvature in a lateral direction. A conformable nosing is engaged with a first surface of the glass ribbon such that the conformable nosing conforms to the curvature of the glass ribbon. The glass ribbon is scored along a scoring line on a second surface of the glass ribbon. The conformable nosing is then at least partially disengaged from the first surface of the glass ribbon by adjusting a bow of the conformable nosing. A bending moment is applied to the glass ribbon to separate a glass sheet from the glass ribbon at the scoring line. Application of the bending moment conforms the curvature of the glass ribbon to the bow of the conformable nosing prior to the glass sheet separating from the glass ribbon.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: April 3, 2012
    Assignee: Corning Incorporated
    Inventors: Julie A. Delia, Marvin W. Kemmerer, Naiyue Zhou
  • Patent number: 8132427
    Abstract: A spray nozzle is used in a process of quenching a hot glass sheet during a laser scoring process or other high energy glass heating process. The scoring is conducted by a high energy means such as a laser. The nozzle is located in proximity to the glass sheet, creating gas in liquid used to quench the glass located in the nozzle (e.g., water). The gas (e.g., air bubbles) is removed from the quenching liquid. Then, the spray nozzle is used to spray the quenching liquid onto the sheet at a location trailing laser scoring of the sheet, such as using a traveling anvil machine at the bottom of the draw. The spray nozzle (purge nozzle) has a purge opening and tubing leading to a discharge location. The purge nozzle can have a sloped passageway that pre-stages gas bubbles near the purge opening in the nozzle. The spray nozzle can include a cooling coil passing around the nozzle passageway that enables a coolant to travel along the coil.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: March 13, 2012
    Assignee: Corning Incorporated
    Inventors: James William Brown, Patrick Michael Gargano, Keith Mitchell Hill, Xinghua Li, William Paul Ryszytiwskyj, Naiyue Zhou
  • Publication number: 20120006059
    Abstract: Isopipes (13) for making glass sheets using a fusion process are provided. The isopipes are made from alumina materials which have low levels of the elements of group IVB of the periodic chart, i.e., Ti, Zr, and Hf, as well as low levels of Sn. In this way, the alumina isopipes can be used with glasses that contain tin (e.g., as a fining agent or as the result of the use of tin electrodes for electrical heating of molten glass) without generating unacceptable levels of tin-containing defects in the glass sheets, specifically, at the sheets' fusion lines. The alumina isopipes disclosed herein are especially beneficial when used with tin-containing glasses that exhibit low tin solubility, e.g., glasses that have (RO+R2O)/Al2O3 ratios between 0.9 and 1.1, where, in mole percent on an oxide basis, (RO+R2O) is the sum of the concentrations of the glass' alkaline earth and alkali metal oxides and Al2O3 is the glass' alumina concentration.
    Type: Application
    Filed: May 20, 2011
    Publication date: January 12, 2012
    Inventors: Matthew J. Dejneka, Benjamin Z. Hanson, Thomas D. Ketcham
  • Patent number: 8083974
    Abstract: Molten glass (G) is set and press-molded in a molding die (60) having dies (621A1, 621A2) corresponding to a lens array. After the molding, the molded article is removed from the molding die (60) and separated by bending at a bend-separation face (121C), which is a boundary part of adjacent lens arrays, so that two lens arrays are produced.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: December 27, 2011
    Assignee: Seiko Epson Corporation
    Inventor: Motoyuki Fujimori
  • Publication number: 20110283739
    Abstract: Provided are a method of manufacturing a glass blank, the method including press-molding a molten glass gob under a state in which a separation mark formed on an upper surface of the molten glass gob faces at least one of the molding surface sides of a pair of press molds arranged facing each other in a horizontal direction, when the molten glass gob falls into a space between the pair of press molds, and a method of manufacturing a magnetic recording medium substrate and a method of manufacturing a magnetic recording medium, both using the glass blank.
    Type: Application
    Filed: March 24, 2011
    Publication date: November 24, 2011
    Applicant: HOYA CORPORATION
    Inventors: Makoto OSAWA, Akira MURAKAMI, Nobuhiro SUGIYAMA, Takashi SATOU, Hideki ISONO, Kinobu OSAKABE, Hidekazu TANINO, Takao MOTOHASHI
  • Publication number: 20110277507
    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: Application
    Filed: May 13, 2010
    Publication date: November 17, 2011
    Inventors: Hung Cheng Lu, Dean G. Sakona, Naiyue Zhou
  • Publication number: 20110277508
    Abstract: Provided is a method of manufacturing a glass blank for a magnetic recording medium glass substrate, including: manufacturing a glass blank by at least press molding a falling molten glass gob with a pair of press molds both so as to face each other in a direction perpendicular to a direction in which the molten glass gob falls, in which: the molten glass gob is formed of a glass material having a glass transition temperature of 600° C. or more; and when the press molding is carried out so that the molten glass gob is completely extended by pressure and molded into a flat glass between press-molding surfaces of the pair of press molds, at least a region in contact with the flat glass in each of the press-molding surfaces of the pair of press molds forms a substantially flat surface.
    Type: Application
    Filed: March 24, 2011
    Publication date: November 17, 2011
    Applicant: HOYA CORPORATION
    Inventors: Makoto OSAWA, Akira MURAKAMI, Nobuhiro SUGIYAMA, Takashi SATOU, Naomi MATSUMOTO, Youichi HACHITANI, Kinobu OSAKABE, Hideki ISONO, Hidekazu TANINO, Takao MOTOHASHI
  • Patent number: 8056367
    Abstract: A situation where glass chip produced as a result of breakage of waste glass sheets floats in a cutting chamber when the waste glass sheets produced in glass sheet producing steps are collected is suppressed. Provided is a glass sheet production installation (1), in which a sheetshaped glass ribbon (B) is formed by supplying molten glass (A) into a forming body (2) and causing the molten glass (A) to flow downward on a conveyance path extending in an upper and lower direction from the forming body (2), and the glass ribbon (B) is cut into a predetermined dimension in a cutting chamber (6) provided on the conveyance path so that glass substrates (C) are produced.
    Type: Grant
    Filed: April 2, 2008
    Date of Patent: November 15, 2011
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Shusei Kin, Hidetaka Oda, Masahiro Tomamoto
  • Publication number: 20110265519
    Abstract: Methods for separating glass sheets from glass ribbons are disclosed. One method includes forming a glass ribbon having a curvature in a lateral direction. A conformable nosing is engaged with a first surface of the glass ribbon such that the conformable nosing conforms to the curvature of the glass ribbon. The glass ribbon is scored along a scoring line on a second surface of the glass ribbon. The conformable nosing is then at least partially disengaged from the first surface of the glass ribbon by adjusting a bow of the conformable nosing. A bending moment is applied to the glass ribbon to separate a glass sheet from the glass ribbon at the scoring line. Application of the bending moment conforms the curvature of the glass ribbon to the bow of the conformable nosing prior to the glass sheet separating from the glass ribbon.
    Type: Application
    Filed: April 29, 2010
    Publication date: November 3, 2011
    Inventors: Julie A. Delia, Marvin W. Kemmerer, Naiyue Zhou
  • Patent number: 8037716
    Abstract: Methods and apparatus for controlling the stress in, and the shape of, the glass ribbon (15) formed in a downdraw glass manufacturing process (e.g., the fusion downdraw process) are provided. In certain embodiments, the control is achieved by cooling the bead portions (21a, 21b) of the ribbon (15) at a rate which provides a heat flux Q?b at the thickest part of the bead (23a, 23b) which is given by Q?b=Q?q+?Q?, where (i) Q?q is the heat flux at a transverse position adjacent to the bead portion (21a, 21b) at which the ribbon's thickness equals 1.05*tcenter, where tcenter is the final thickness at the ribbon's center line (17), and (ii) ?Q??(tb/tq?1)Q?q+10 kilowatts/meter2, where tb is the thickness of the thickest part of the bead portion. The cooling can take place along the entire length of the ribbon (15) or at selected locations, e.g.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: October 18, 2011
    Assignee: Corning Incorporated
    Inventors: Kenneth William Aniolek, Steven Roy Burdette, Liam Ruan de Paor, Eunyoung Park