Preform Reshaping Means Patents (Class 65/286)
  • Patent number: 9981844
    Abstract: A source material, which is based on a glass, is arranged on a working surface of a mold substrate. The mold substrate is made of a single-crystalline material. A cavity is formed in the working surface. The source material is pressed against the mold substrate. During pressing a temperature of the source material and a force exerted on the source material are controlled to fluidify source material. The fluidified source material flows into the cavity. Re-solidified source material forms a glass piece with a protrusion extending into the cavity. After re-solidifying, the glass piece may be bonded to the mold substrate. On the glass piece, protrusions and cavities can be formed with slope angles less than 80 degrees, with different slope angles, with different depths and widths of 10 micrometers and more.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: May 29, 2018
    Assignee: Infineon Technologies AG
    Inventors: Alexander Breymesser, Andre Brockmeier, Carsten von Koblinski, Francisco Javier Santos Rodriguez
  • Publication number: 20150047393
    Abstract: According to one embodiment, a method of manufacturing a glass article having a three-dimensional shape includes heating a glass article blank to a temperature above a setting temperature and coupling the glass article blank to an open-faced mold. The open-faced mold includes a molding region that has a three-dimensional shape that generally corresponds to the shape of the glass article and has an anisothermal temperature profile within the molding region. The method further includes maintaining an anisothermal temperature profile along the glass article blank and cooling the glass article blank while the glass article blank is coupled to the molding region of the open-faced mold to set the shape of the glass article.
    Type: Application
    Filed: July 30, 2014
    Publication date: February 19, 2015
    Inventors: Weiwei Luo, Rohit Rai, Ljerka Ukrainczyk, Zheming Zheng, Sam Samer Zoubi
  • Patent number: 8869563
    Abstract: The invention relates to a device for marking the inside of a hollow glass item having at least one plunger comprising at least one raised and/or hollow pattern and a support assembly for said at least one plunger that can be moved between a first position in which the plunger is outside the item, and a second position in which the plunger is inside the item, and having radial movement means for moving said at least one plunger in a passive position spaced away from the inner surface of the side wall of the item and an active position pressed against said inner surface to imprint said at least one raised and/or hollow pattern.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: October 28, 2014
    Assignee: Pochet du Courval
    Inventors: Pascal Froissart, Sebastien Baliteau
  • Patent number: 8776550
    Abstract: A glass sheet is placed on a mold and heated to a first temperature. The glass sheet is then formed into a glass article having a three-dimensional shape using the mold. An isothermal heat transfer device comprising at least one heat pipe is provided in thermal contact with the mold. With the glass article on the mold and the isothermal heat transfer device in thermal contact with the mold, the glass article, mold, and isothermal heat transfer device are transported along a thermally-graded channel to cool the glass article to a second temperature. During the transporting, the isothermal heat transfer device transfers heat from a relatively hot region of the mold to a relatively cold region of the mold.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: July 15, 2014
    Assignee: Corning Incorporated
    Inventors: Nikolaos P Kladias, Kenneth Spencer Morgan, Elias Panides, Rohit Rai, John R Ridge, Ljerka Ukrainczyk
  • Patent number: 8596093
    Abstract: Provided is an optical element manufacturing method by which optical elements, such as a beam shaping element having a molded side surface, are highly efficiently and accurately manufactured by pressure-molding a molten glass drop. After supplying a lower molding die with the molten glass drop of a prescribed volume at a temperature higher than that of the molding die, the molten glass drop is pressure-molded by the molding die, and a free surface solidified without being in contact with the molding die is formed between a molded upper surface and the molded side surface. The volume of the molten glass drop to be supplied is 0.8 times or more but not more than 0.97 times the volume of a space configured by an extended molded upper surface, an extended molded side surface and the molded lower surface when the molded upper surface and the molded side surface are extended.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: December 3, 2013
    Assignee: Konica Minolta Opto, Inc.
    Inventors: Kazuyuki Ogura, Yoshihiro Kamada
  • Publication number: 20130258485
    Abstract: A method of making a glass lenticular array is provided. The method comprises: heating a sheet of glass, the sheet of glass comprising contact regions located thereupon in substantially parallel linear rows; and deforming the heated sheet of glass by contacting the contact regions with a forming body so as to form a plurality of cylindrical lenses in the heated sheet of glass, the plurality of cylindrical lenses arranged in substantially parallel rows with depressed regions between adjacent cylindrical lenses. The depressed regions are formed at the contact regions while apex regions of the cylindrical lenses are kept untouched during the step of deforming.
    Type: Application
    Filed: March 27, 2012
    Publication date: October 3, 2013
    Inventors: Heather D. Boek, Robert A. Boudreau, Thierry L.A. Dannoux, Jacques Gollier, Mark O. Weller
  • Patent number: 8518544
    Abstract: A glass sheet for a laminated glass to be fit into a frame of an automobile in a flash-mount structure, that is a glass sheet having a good strength, is provided. In the glass sheet of the present invention, the maximum value of the plane compressive stress on the edge of the glass sheet is at least 10 MPa and at most 18 MPa, and the maximum value of the plane compressive stress inside from the edge of the glass sheet is at most 2.4 MPa.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: August 27, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Yasumasa Kato, Akira Sugahara
  • Publication number: 20130125588
    Abstract: A glass sheet is placed on a mold and heated to a first temperature. The glass sheet is then formed into a glass article having a three-dimensional shape using the mold. An isothermal heat transfer device comprising at least one heat pipe is provided in thermal contact with the mold. With the glass article on the mold and the isothermal heat transfer device in thermal contact with the mold, the glass article, mold, and isothermal heat transfer device are transported along a thermally-graded channel to cool the glass article to a second temperature. During the transporting, the isothermal heat transfer device transfers heat from a relatively hot region of the mold to a relatively cold region of the mold.
    Type: Application
    Filed: October 22, 2012
    Publication date: May 23, 2013
    Inventors: Nikolaos P. Kladias, Kenneth Spencer Morgan, Elias Panides, Rohit Rai, John R. Ridge, Ljerka Ukrainczyk
  • Patent number: 8418502
    Abstract: The present invention relates to a heating apparatus for glass-sheet-forming, which prevents formation of a heater distortion in a portion of a glass sheet facing to a temperature-distributing heat shield.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: April 16, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Tatsuo Yajima, Akira Sugahara, Hiroshi Yamakawa, Akio Imaichi
  • Patent number: 8413467
    Abstract: The invention relates to a device for cambering a glass sheet, said device comprising a pressing station provided with a male press and a female press which are arranged opposite each other in a complementary manner. The male press is formed from at least two distinct resilient parts, a base and at least one forming complement, which are adapted in such a way as to be fixed to each other. Said forming complement is detachable and interchangeable according to the form to be applied to the glass sheet, and comprises a fixing surface which is adapted in such a way as to be fixed to a fixing surface of the base, and a forming surface which is adapted in such a way as to be pressed against the glass sheet in order to apply the desired form thereto. The invention also relates to an industrial installation comprising one such device, and to a method for implementing said device.
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: April 9, 2013
    Assignee: AGC Flat Glass Europe SA
    Inventor: Jean-Francois Guillaume
  • Patent number: 8343393
    Abstract: In a molding apparatus in which upper and lower dies are held in a bearing, there are provided pipes for introducing N2 gas used for controlling temperatures of balls of the bearing, whereby difference in temperature between the guide member and the upper and lower dies is controlled. With this structure, it is possible to prevent generation of an excessive compressive force between the upper die and the lower die and the bearing, to thereby prevent breakage of the dies. Further, it is also possible to prevent formation of gaps between the upper die and the lower die and the bearing, to thereby mold an optical element excellent in accuracy of an optical axis.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: January 1, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takeshi Nomura
  • Publication number: 20120297834
    Abstract: An apparatus for shaping at least one glass sheet. The apparatus includes a lower press ring and an upper press ring configured to clamp a perimeter section of the glass sheet between the lower press ring and the upper press ring. The apparatus also includes an upper press at least partially disposed within the upper press ring, the upper press configured to shape at least a section of the glass sheet inside the perimeter section of the glass sheet.
    Type: Application
    Filed: May 27, 2011
    Publication date: November 29, 2012
    Applicant: Pittsburgh Glass Works, LLC
    Inventors: David V. King, David T. Perry, Kurt Steinbacher
  • Publication number: 20120287057
    Abstract: The present invention discloses an integrated glass including opposite outer and inner surfaces and a solid sculpted area formed either on the outer surface or the inner surface. The solid sculpted area includes a number of concave shapes or convex shapes which can be used to form letters, numbers or patterns for user decorating or identifying. Besides, a mold for fabricating the integrated glass, a method for making the integrated glass, and a touch sensor device with such integrated glass are also disclosed by the present invention.
    Type: Application
    Filed: June 28, 2011
    Publication date: November 15, 2012
    Applicant: Weis Limited
    Inventor: Kang WEI
  • Publication number: 20120047954
    Abstract: An apparatus and method for heat treating a plurality of glass substrates. The glass substrates are supported on support platform and housed in a heat treating furnace. The substrates are supported in a substantially vertical orientation by restraining pins extending through walls of the furnace, and are separated from each other by frame-shaped spacing members. The spacing members reduce convection currents between the substrates and reduce or eliminate the post-heat treating distortion of each glass substrate to less than 100 ?m over the entire surface of the substrate.
    Type: Application
    Filed: August 30, 2010
    Publication date: March 1, 2012
    Inventors: Frank T. Coppola, Monica J. Mashewske
  • Publication number: 20110185770
    Abstract: There is provided a device for manufacturing a molded glass body, including a fall-prevention means for preventing the glass molded body which has stuck on the upper mold from falling down on the lower mold. Thus, the molded glass body does not damage the lower mold, even if the molded glass body which has stuck on the upper mold falls down from the upper mold, during a period from an end of the pressure molding to releasing and withdrawing the molded glass body obtained by the pressure molding from the any one of the upper mold and the lower mold.
    Type: Application
    Filed: September 10, 2009
    Publication date: August 4, 2011
    Inventors: Kazuyuki Ogura, Yoshihiro Kamada
  • Publication number: 20110067450
    Abstract: An apparatus for making shaped articles includes a container having at least one vacuum port and a surface for receiving a sheet of glass-based material. At least one positive mold is supported in the container, where the at least one positive mold has an exterior surface including a profile defining an interior of a shaped article. An open volume is defined between the container and the at least one positive mold and is in communication with the vacuum port.
    Type: Application
    Filed: September 23, 2009
    Publication date: March 24, 2011
    Inventors: Allan Mark Fredholm, Christophe Pierron, Patrick Jean Pierre Herve, Thierry Luc Alain Dannoux
  • Publication number: 20100326138
    Abstract: A processing device is configured to irradiate a laser beam onto a glass substrate for processing. The processing device has a work table, a laser beam output section, a multi-spot focus section, a rotation drive mechanism, an optical system, and a laser beam scan section. The multi-spot focus section receives a laser beam, and splits and focuses the laser beam inputted therein into a plurality of beam focus spots. The rotation drive mechanism rotates the plurality of beam focus spots about a single center axis that is arranged in a center of the plurality of beam focus spots. The optical system guides the laser beam to the multi-spot focus section. The laser beam scan section moves all the plurality of beam focus spots rotating about the single center axis in a desired direction within a predetermined range of a plane arranged along a surface of the glass substrate.
    Type: Application
    Filed: June 30, 2010
    Publication date: December 30, 2010
    Inventors: Issei KUMATANI, Seiji SHIMIZU
  • Publication number: 20100319401
    Abstract: An ultra-thin glass sheet is formed using a roll-to-roll glass soot deposition and sintering process. The sintering involves initially heating and sintering one or more central segments of a glass soot sheet, and progressively heating and sintering glass soot sheet segments that are located laterally or axially adjacent to previously-sintered segments such that, along respective width directions of the glass soot sheet, only a portion of the width is sintered at a given time interval during the heating.
    Type: Application
    Filed: June 19, 2009
    Publication date: December 23, 2010
    Inventors: Calvin Thomas Coffey, Daniel Warren Hawtof, Stanley Zinn
  • Publication number: 20100307195
    Abstract: A device for processing a usable surface extending on a usable side of a substrate (11) having a large surface area, particularly such having a length or width >0.5 m and a thickness <1 cm, through the substrate, has at least three bearing elements (21, 23, 25) disposed at a distance from each other for receiving the substrate (11), and a movable processing device for processing the substrate between the bearing elements from the rear of the substrate. The bearings support the substrate, and processing of the glass substrate can be carried out in the at least two intermediate regions between the bearing elements from the rear. At least one non-terminal bearing element is disposed displaceable or movable relative to the substrate in order to make the entire usable surface of the substrate accessible to the processing device by displacement or movement.
    Type: Application
    Filed: January 12, 2009
    Publication date: December 9, 2010
    Applicant: IWORKS AG
    Inventor: Arthur Buchel
  • Publication number: 20100242544
    Abstract: An optical lens forming mold is adapted to press and form a glass preform into an optical lens. The forming mold includes a sleeve, a lower mold core, and an upper mold core. The upper mold core and the lower mold core are disposed within the sleeve opposite to each other, and the glass preform is disposed between the upper mold core and the lower mold core. At least one edge of the upper mold core and the lower mold core is surroundingly arrangement with a baffle. The glass preform is pressed and formed into an optical lens by the upper mold core and the lower mold core, and a shape of the optical lens to be formed is controlled by the battle.
    Type: Application
    Filed: June 11, 2009
    Publication date: September 30, 2010
    Applicant: KINIK COMPANY
    Inventors: Wen Jen Liao, Tsai Lung Wang, Wen Hao Chuang, Wen Yu Liang, Tzu Yu Lin
  • Patent number: 7665331
    Abstract: A method and machine for obtaining bent glass sheets. Glass sheets are brought to their softening temperature, then they are caused to travel over a shaping bed of advancing elements for advancing them which are arranged along a path having a circular arc-shaped profile, the sheets progressively assuming their shape on entering the bed and over a first shaping zone, then being hardened by tempering or cooling in a second zone of the bed until they leave, and then the bent glass sheets thus obtained are recovered. The shaping bed is produced with a profile extending in a circular arc of more than 90°, and, on leaving the shaping bed, the hardened glass sheets are moved in a direction opposite that in which they were fed in.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: February 23, 2010
    Assignee: Saint-Gobain Glass France
    Inventors: Jacques Leclercq, Gilles Garnier
  • Publication number: 20090217706
    Abstract: The invention relates to a method for producing a low-radiation cover glass with low intrinsic ?-radiation for radiation-sensitive sensors, in particular for use with semiconductor technology, without the production of intermediate moulds, by the direct shaping of plate glass with appropriate dimensions. The invention also relates to a device for carrying out said method.
    Type: Application
    Filed: October 2, 2006
    Publication date: September 3, 2009
    Applicant: Schott AG
    Inventors: Andreas Weber, Holger Wegener, Reinhard Kassner, Peter Brix
  • Publication number: 20090162623
    Abstract: The invention relates to a process for structuring a surface, that is to say for forming at least one array of features with a submillimeter-scale lateral characteristic dimension on a plane surface of a product comprising a rigid glass element (1) and at least one layer (1a) attached to said glass element (1), the structuring being carried out on said layer (1a) and a surface structuring, by plastic or viscoplastic deformation, being carried out by contact with a structured element called a mask (10) with application of pressure, the structuring taking place by a continuous movement, parallel to the surface, of the product and by a movement of the mask about an axis parallel to the plane of the surface of the product. The invention also relates to a glass product having a structured surface and to its uses.
    Type: Application
    Filed: November 14, 2006
    Publication date: June 25, 2009
    Inventors: Maud Foresti, Elin Sondergard, Ludivine Menez
  • Publication number: 20080110207
    Abstract: A preform manufacture apparatus is provided which can produce a preform at low cost. A preform manufacture apparatus 1 has a first mold 20 which receives molten glass, and a second mold 50 which receives a molten glass block moved from the first mold 20. The first mold 20 has a receiving surface 20A which receives molten glass, and is dividable into two or more of split dies 30 and 40 at the receiving surface 20A.
    Type: Application
    Filed: December 9, 2005
    Publication date: May 15, 2008
    Inventors: Shigeki Fukuda, Makoto Kidachi, Ryosuke Sakai, Futoshi Ishizaki
  • Patent number: 7341442
    Abstract: An exemplary mold for molding lenses includes an upper mold core, a lower mold core, and a shell. The upper mold core has a first convex molding surface. The lower mold core has a second convex molding surface opposite to the first convex molding surface. The shell has an upper portion and a lower portion for respectively accommodating the upper mold core and the lower mold core therein. The shell has an inner step support formed between the upper portion and the lower portion.
    Type: Grant
    Filed: May 12, 2006
    Date of Patent: March 11, 2008
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Shih-Chieh Yen
  • Publication number: 20070204655
    Abstract: A pair of upper die and lower die having forming surfaces corresponding to optical glass elements are prepared. A locating member having a plurality of locating holes for locating preforms is arranged on the lower die. A plurality of preforms are supplied to the locating holes, respectively, and the preforms are hot-press-molded between the paired upper die and lower die. According to this method, since a plurality of optical glass elements can be formed simultaneously, the high-precision optical glass elements can be manufactured at low cost.
    Type: Application
    Filed: February 28, 2007
    Publication date: September 6, 2007
    Inventor: Kinya Kato
  • Patent number: 6823695
    Abstract: An object of the present invention is to enable to use a common transfer machine for transferring performs to and for transferring products from a press-forming system for glass having a plurality of press units. The press-forming system for glass has a plurality of press units. A linear moving stage is arranged in the proximity of the press units. A transfer robot is mounted on the linear moving stage. A pallet changer is arranged in the proximity of an end of the linear moving stage. A tray presently in use is mounted on a first mount and a new tray on standby is mounted on a second mount on the pallet changer. The inner space of the tray is partitioned into sections so as to correspond to press units in number. In each section, a plurality of pockets is arranged for storing preforms or products one by one.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: November 30, 2004
    Assignee: Toshiba Machine Co., Ltd.
    Inventors: Satoshi Fukuyama, Hiroaki Fujii, Isao Matsuzuki, Hirotaka Masaki
  • Patent number: 6766660
    Abstract: A molding die has a shell having a penetration hole, a lower pattern installed in the lower opening of the shell, and an upper pattern slidably disposed from the upper opening of the shell. The shell includes an outer shell and an inner shell disposed inside of the outer shell. The inner shell is includes plural split shells. The inner shell can be separated from the outer shell. The inner shell, lower pattern, and upper pattern form a cavity. As a result, if the molded product sticks to the inner circumference of the shell, the molded product can be easily taken out of the molding die by disassembling the shell. Further, a molded product having an excellent dimensional precision can be manufactured.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: July 27, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masaaki Tojo, Kazuo Morioka
  • Publication number: 20040025538
    Abstract: An method and apparatus for shaping a floor of a glass vessel including a source of pressurized gas, a pressure-sealed housing in fluid communication with the source of pressurized gas and a mold at least partially within the pressure-sealed housing. The mold includes a shaping floor with a first side subjected to the source of pressurized gas.
    Type: Application
    Filed: June 5, 2003
    Publication date: February 12, 2004
    Inventors: Christian Kunert, Andreas Langsdorf, Friedrich Lampart, Heinz Franz, Roman Oberhnsli
  • Publication number: 20030182968
    Abstract: The invention is directed to a method of apply controllable pneumatic force in a multibarrel pipette puller to pull single and multibarrel pipettes. A multibarrel pipette puller has a top mechanical portion and a bottom control box. In the top mechanical portion, a metal base is mounted with a pneumatic cylinder, a linear motion guide rail with its movable block connected a clamp body, a pneumatic rotator connected a drill chuck and a pair of heater fixture located between the clamp body and the drill chuck. An optical grid plate is attached on side of the clamp body. An optical sensor is mounted on the metal base along side of the optical grid plate moving path. The piston rod of pneumatic cylinder is connected to the clamp body to deliver pulling and pushing force. The rotator can turn the drill chuck up to 180 degree clockwise or turn counter clockwise back to original position. Both the cylinder and rotator are actuated by pressured air.
    Type: Application
    Filed: March 28, 2003
    Publication date: October 2, 2003
    Inventor: Zong Yuen Cai
  • Publication number: 20030115907
    Abstract: A method for forming a plurality of optical elements simultaneously includes placing a transfer material against an inner surface of a master die, which has a shape commensurate with a desired shape of a plurality of optical elements to form a molding die, which thereby has an inner surface substantially a negative of the master die's inner surface. A moldable sheet, such as glass, is pressed against the molding die to form a unitary molded sheet, and the molded sheet is cut apart to form a plurality of optical elements, including lenses or other optical elements as desired.
    Type: Application
    Filed: September 7, 2001
    Publication date: June 26, 2003
    Inventors: Edward K. Patton, Layne Howell, Jean-Luc Nogues
  • Patent number: 6574992
    Abstract: During a process for bending and quenching a window pane, the latter is bent to the desired shape using a forming frame. Next, by means of this same forming frame, the entire surface of both sides of the bent window pane is rapidly cooled, in a quenching station which follows the bending station, by blowing cold air using blowing boxes provided with blowing nozzles. While the entire surface is being rapidly cooled, the edge regions of the window pane which rest on the forming frame are subjected to a blast of additional cold air by the suitable supply of compressed air to the openings passing through the forming frame.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: June 10, 2003
    Assignee: Saint-Gobain Glass France
    Inventors: Hans-Werner Kuster, Werner Diederen, Knut Dahlhoff, Karl-Josef Ollfisch, Wilfried Korsten
  • Patent number: 6560994
    Abstract: Disclosed is a mold including upper and lower molds for obtaining glass optical elements by press molding a glass molding material softened by heat, in which either one of the upper and lower molds is made of a ceramic matrix and the matrix has no surface hole having a diameter of 300 microns or more on the molding surface, and a method for manufacturing glass optical elements using the mold. For example, on the upper mold 21 and the lower mold 22, formed is a &bgr; type silicon carbide having a thickness that a molding surface can be reproduced by grinding and a density of 3.20 g/cm3 or more so as to include at least the molding surface facing a surface of the glass molding material G. The mold according to the invention can be reused even where pullouts occur from repetitive use.
    Type: Grant
    Filed: July 17, 1998
    Date of Patent: May 13, 2003
    Assignee: Hoya Corporation
    Inventor: Shinichiro Hirota
  • Patent number: 6370918
    Abstract: A press forming machine for optical devices which manufactures, an optical device from silica glass with a high glass transition point. A transparent quartz tube surrounds an upper die unit, lower die unit, fixed shaft, and moving shaft to form an airtight chamber inside it. Infrared lamps are arranged along the outer surface of the transparent quartz tube, and a reflecting mirror is arranged behind the infrared lamps. A cooling gas jacket is formed to cover the rear surface of the reflecting mirror. The inner-diameter side wall surface of the jacket and the reflecting mirror have many through holes. A cooling gas is sprayed from the interior of the jacket toward the transparent quartz tube through the through holes, thereby cooling the reflecting mirror, quartz bulbs constituting the outer surfaces of the infrared lamps, and the transparent quartz tube.
    Type: Grant
    Filed: February 15, 2001
    Date of Patent: April 16, 2002
    Assignee: Toshiba Machine Co., Ltd.
    Inventors: Satoshi Fukuyama, Toshihisa Kamano, Isao Matsuzuki, Hiroshi Murakoshi
  • Patent number: 6363747
    Abstract: A method for making working mold tools for use in a compression molding process for molding optical glass elements from high temperature glasses having Tg's in the range of from about 400° C. to about 850° C. An yttria aluminosilicate glass is fabricated by traditional melting and casting processes to thereby make an amorphous base material having a minimum apparent viscosity of 1015 poise at the temperature at which the optical glass elements are to be molded. A mold preform is made from the base material. A first surface figure for the optical element to be molded with the working mold tool is defined. A second surface figure for a master mold tool and a third surface figure for the working mold tool are computed based upon the first surface figure and the coefficients of thermal expansion of the optical element, the master mold tool, and the working mold tool, the temperature at which the working mold tool is molded, and the temperature at which the optical element is to be molded.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: April 2, 2002
    Assignee: Eastman Kodak Company
    Inventors: Michael K. Budinski, John C. Pulver, Jayson J. Nelson, Eugene G. Hill, David A. Richards
  • Patent number: 6343489
    Abstract: A variable radius bending apparatus is disclosed for bending a glass plate. The variable radius bending apparatus includes a bending rail having a longitudinal rail member and a drive drum and a tension drum rotatably attached thereto. A drive band is positioned around the drive drum and tension drum and in frictional engagement therewith. A plurality of rollers are in driven contact with the drive band and are tiltable to a desired bend radius for forming the desired bend radius in the glass plate. Finally, a band guide is fixedly attached to the bending rail and in juxtaposition with the drive band for preventing the drive band from moving transversely with respect to the drive drum and tension drum, whereby the band is prevented from contacting a surface adjacent to the band.
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: February 5, 2002
    Assignee: Visteon Global Technologies Inc.
    Inventor: Larry Gene Smith
  • Patent number: 6318125
    Abstract: A process for shaping glass sheets with a surface-shaping mould, against which the glass sheets are pressed using a pressure drop produced by sucking out the air from the space lying between the moulding face and that face of the glass sheet on the opposite side from the glass sheet, in which the pressure drop is a maximum at the edge of the glass sheet and decreases towards the center of the glass sheet, because of fact that air is introduced via air-inlet apertures opening into the moulding face, the air is again extracted by subjecting suction apertures made in the moulding face inside the region covered by the respective glass sheet to a vacuum. Furthermore, pressure between the glass sheet and the moulding face also in the region where the air is introduced is set to a value at most equal to the pressure beyond the glass sheet, in order to avoid any formation of bulging. A shaping mould suitable in particular for implementing this process is also described.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: November 20, 2001
    Assignee: Saint-Gobain Vitrage
    Inventors: Werner Diederen, Karl-Josef Ollfisch, Klaus-Peter Heining, Knut Dahlhoff, Wilfried Korsten, Herbert Radermacher
  • Patent number: 6299429
    Abstract: The substrate of a magnetic recording medium is laser textured employing a dual fiber-optic laser delivery system which enables separate control of nucleation and crystallization. An embodiment of the invention includes laser texturing glass, ceramic and glass-ceramic substrates without microcracking to form a texture comprising uniform protrusions.
    Type: Grant
    Filed: April 13, 1998
    Date of Patent: October 9, 2001
    Assignee: Seagate Technology LLC
    Inventor: Jialuo Jack Xuan
  • Publication number: 20010020371
    Abstract: A machine for processing hollow glass objects (8) is described. The machine includes a sequence of like processing units (1) to (15) and (A, B) on which a small number of processing steps can be carried out on the workpiece (8). The workpieces (8) are brought to the processing unit on a clock-driven loading belt (4) and taken therefrom. A workpiece, which is being processed in a unit, is held during the entire sequence by one and the same workpiece holder. Each processing unit includes two separate handling units with which two workpieces run through the workstations time displaced. The machine arrangement permits processing units to be taken out or switched into the line without a production standstill.
    Type: Application
    Filed: March 12, 2001
    Publication date: September 13, 2001
    Inventors: Wolfgang Fischer, Alois Christ, Michael Kaus, Angelika Kaus, Heiner Muhl
  • Patent number: 6279347
    Abstract: This invention provides a method and an apparatus for producing a bent glass sheet. A heated glass sheet (4, 24, 24*) conveyed from a heating furnace (1, 21) is bent by pressing with at least one belt (5, 9, 25) made of a heat-resistant material against a bending member (6, 10, 26, 28). The bent glass sheet is further conveyed and cooled for quenching or annealing in a cooling apparatus (3, 23). The bent glass is cooled after separating the belt. According to this invention, the bent glass sheets having surfaces on which defects, such as marks of rolls, are suppressed can be produced efficiently.
    Type: Grant
    Filed: July 12, 2000
    Date of Patent: August 28, 2001
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventor: Hideo Yoshizawa
  • Patent number: 6099765
    Abstract: A method of forming an optical component wherein imperfections in molding the optical component, such as a lens, are removed by: heating an optical material to its plastic state; forming the optical material into the desired shape by employing a mold apparatus and applying a molding pressure; releasing all pressure from the shaped optical material by separating sections of the mold in order to relieve internal stress in the optical material while the optical material is at its plastic state temperature; slowly and controllably reducing the temperature of the optical material.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: August 8, 2000
    Assignee: Fuji Photo Optical Co., Ltd.
    Inventors: Hajime Yamanaka, Yasuhiko Sato
  • Patent number: 6003336
    Abstract: A die for press-molding glass optical elements which can press-mold glass optical elements having high melting points and various shapes repeatedly, which includes a base material having high strength on which a cutting layer having heat resistance and free cutting machinability is formed. After cutting the cutting layer into the desired shape with high accuracy, the die is coated with a surface protective film.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: December 21, 1999
    Assignee: Matsushita Electric Industrial Co. Ltd.
    Inventors: Yoshinari Kashiwagi, Makoto Umetani, Hidenao Kataoka, Kenji Inoue, Shoji Nakamura, Satoru Morimoto
  • Patent number: 5992180
    Abstract: A glass plate is heated in a heating furnace and is bend-shaped to be a complexly curved glass plate while the glass plate is passed on curved rollers wherein support pads of a pushing mechanism push the complexly curved glass plate from an upstream side to a downstream side of a transferring device in a state that a rear edge of the complexly curved glass plate is supported by the support pads whereby the complexly curved glass plate is delivered to a cooling device side while a turning movement of the complexly curved glass plate is controlled during the transfer.
    Type: Grant
    Filed: August 5, 1998
    Date of Patent: November 30, 1999
    Assignee: Asahi Glass Company Ltd.
    Inventors: Masahiro Tsuchiya, Tsuyoshi Kawaguchi, Ken Nomura, Kohei Yoshino
  • Patent number: 5974836
    Abstract: A device used for the bending of plate glass sections (3) includes an oven (1), a bending chamber (6), an upper bending mold installed in the bending chamber (6) in such a manner as to be able to be raised and lowered, a duct producing a flow of hot gas in order to raise the plate glass sections (3) against the upper bending mold, a lower bending mold in the form of a frame that works together with the upper bending mold to ensure bending by compression of the plate glass that is held by the flow of hot gas against the upper bending mold, as well as a movable transport frame (20) which is used to pick up the bent plate glass from the upper bending mold and to transport it to a cooling station located downstream.
    Type: Grant
    Filed: June 15, 1998
    Date of Patent: November 2, 1999
    Assignee: Saint-Gobain Vitrage
    Inventors: Herbert Radermacher, Karl-Josef Ollfisch, Werner Diederen, Knut Dahlhoff
  • Patent number: 5938807
    Abstract: In press molding, a shaft (metal mold 13) is moved by positional or torque control to cause upper and lower molds to reach a set position slightly before a position where the upper and lower molds are set in a final mold closed state. As soon as the upper and lower molds reaches the set position, the control is switched to torque control using a small force which does not deform a glass material to perform feedback control. For this reason, when the cooling process is started, the mobile shaft is moved by the same amount as a contraction amount of the shaft, the actual position of the shaft is moved. However, a tight contact state between the molds and the glass material is kept without changing the thickness of the glass material, and positional control and torque control can be apparently performed at once. Thereafter, when temperature reaches an almost glass transition point, final pressing is performed.
    Type: Grant
    Filed: February 5, 1998
    Date of Patent: August 17, 1999
    Assignee: Toshiba Machine Co., Ltd.
    Inventors: Yoshizo Komiyama, Tetsuya Tanioka, Toshihisa Kamano, Hirotaka Masaki
  • Patent number: 5888268
    Abstract: A glass-plate working apparatus (A) includes a base (2) on which a glass plate (1) is placed; Y-direction movable bases (3) and (4) which are supported by the base (2) movably in a Y-direction perpendicular to an X-direction; a Y-direction moving device (5) for moving the movable bases (3) and (4) in the Y-direction; a frame (8) which is supported by the Y-direction movable bases (3) and (4) via scuffing preventing devices (6) and (7); an X-direction movable base (9) which is supported by the frame (8) movably in the X-direction; an X-direction moving device (10) for moving the X-direction movable base (9) in the X-direction; and a working head (12) mounted on the X-direction movable base (9) so as to form a cut line (11) for bend-breaking on the glass plate (1).
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: March 30, 1999
    Assignee: Bando Kiko Co., Ltd.
    Inventor: Shigeru Bando
  • Patent number: 5855641
    Abstract: Molds for press molding an optical element of glass are disclosed. Proposed are: (1) A mold contains oxygen at the interface between a mold base of the mold and a carbon film formed at least on the molding surface of the mold base with an oxygen amount of 0-10 atom % and with the interface of a width of 0-500 .ANG., (2) a mold subjected to carbon ion injection at least on the molding surface of the mold base, and (3) a mold subjected to ion injection during or after formation of a carbon film at least on the molding surface of the mold base material.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: January 5, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yasushi Taniguchi
  • Patent number: 5817161
    Abstract: In forming a piano-convex lens from a column-like lens blank by heating the blank to a temperature higher than the transition temperature thereof and by pressurizing an upper die with a closed space formed between the blank and the upper die, there are alternately repeated operations of pressurizing the upper die and stopping the application of pressure thereto. Through the control of the amount of displacement of the upper die, the maximum pressure of gas in the closed space at each pressurizing step is so controlled: as to be low according to the surface viscosity of the blank to the extent that no local concave deformation in the surface of the blank is produced; and as to be high to the extent that gas caught in the closed space is discharged at each step of stopping the application of pressure.
    Type: Grant
    Filed: January 15, 1997
    Date of Patent: October 6, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuaki Takagi, Kenji Yamaguchi
  • Patent number: 5788732
    Abstract: A method and apparatus for forming an optical device of a desired shape presses a heat-softened optical material using a set of molds. The optical material is aligned with respect to the molds by two or more aligning members which move around the center of the mold relative to each other. The optical material may also be aligned by inserting a pin into an aligning hole which is fixed to the mold body and has been aligned with respect to the molds.
    Type: Grant
    Filed: April 18, 1996
    Date of Patent: August 4, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Nomura, Nobuyuki Nakagawa, Kiyoshi Yamamoto, Sunao Miyazaki
  • Patent number: 5766294
    Abstract: A method and an apparatus for producing an optical element capable of performing a molding temperature control required for a plurality of independent molding blocks in a short period of time, and continuously and simultaneously producing a plurality of different optical elements having a high degree of accuracy at a low cost is provided.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: June 16, 1998
    Assignee: Matsushita Electric Industrial Co, Ltd.
    Inventors: Kazuaki Takagi, Tadayoshi Yonemoto, Takashi Inoue, Shoji Nakamura