Patents by Inventor Guido Rake
Guido Rake has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240010539Abstract: A method of making glass products includes: heating material to obtain a glass melt; heating the glass melt in a melting tank having a melting tank bottom, the glass melt having a melt volume, a melt surface, and a viscosity of 102 dPas at a temperature above 1580° C. The glass melt is heated such that at least some of the glass melt has a viscosity of 102.5 dPas or less. An amount of thermal energy introduced directly into the melt volume is more than 60% of a total amount of thermal energy introduced into the glass melt. A maximum difference between a temperature at a location on the melt surface and a temperature at a location at the melting tank bottom vertically underneath the location on the melt surface is such that a difference in glass melt densities is less than 0.05 g/cm3 per meter distance between the locations.Type: ApplicationFiled: September 20, 2023Publication date: January 11, 2024Applicant: Schott AGInventors: Hildegard Römer, Michael Hahn, Stefan Rosner, Volker Trinks, Rainer Eichholz, Christoph Bergmann, Armin Vogl, Jörg Hessenkemper, Horst Blei, Klaus Schönberger, Sybille Haas, Guido Räke, Stefan Schmitt, Christoph Berndhäuser, Olaf Claussen, Christopher Klein, Wolfgang Schmidbauer
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Patent number: 8424342Abstract: A method for melting inorganic materials, preferably glasses and glass-ceramics, in a melting unit with cooled walls is provided. The method includes selecting the temperature of at least one region of the melt is selected in such a way as to be in a range from Teff?20% to Teff+20%, where the temperature Teff is given by the temperature at which the energy consumption per unit weight of the material to be melted is at a minimum, with the throughput having been selected in such a way as to be suitably adapted to the required residence time.Type: GrantFiled: March 31, 2004Date of Patent: April 23, 2013Assignee: Schott AGInventors: Werner Kiefer, Hildegard Römer, Frank-Thomas Lentes, Guido Räke, Volker Ohmstede, Karin Naumann, Michael Leister, Gerhard Nuessle, Erich Rodek, Wolfgang Schmidbauer
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Patent number: 7905115Abstract: The invention relates to glass powder, especially a biologically active glass powder, which includes a plurality of glass particles and which is characterized by the following features: the glass particles are made up by >90% of non-spherical particles; the geometry of the individual non-spherical particle is characterized by a ratio of length to diameter of 1.1 to 105.Type: GrantFiled: December 21, 2005Date of Patent: March 15, 2011Assignee: Schott AGInventors: Guido Räke, Hildegard Römer, Peter Schreckenberg, Josè Zimmer, Frank Büllesfeld, Jörg Fechner, Cevin Czisch, Udo Fritsching
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Patent number: 7444837Abstract: A method and an apparatus for the rapid melting of glasses in a skull crucible is provided. The method and apparatus introduce high-frequency energy into the contents of the crucible by means of a coil arrangement surrounding the skull crucible, in order to heat the melt, and the batch is laid and the molten glass discharged in the upper region of the crucible, and undissolved constituents of the batch are retained by means of a cooled bridge which is immersed in the melt. The glass is taken off above the coil arrangement and is fed for further processing without flowing through the coil region.Type: GrantFiled: October 1, 2002Date of Patent: November 4, 2008Assignee: Schott AGInventors: Hildegard Römer, Michael Leister, Uwe Kolberg, Karl Mennemann, Guido Räke, Ernest Walter Schäfer, Sybill Nüttgens, Volker Ohmstede
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Publication number: 20080060382Abstract: The invention relates to glass powder, especially a biologically active glass powder, which includes a plurality of glass particles and which is characterized by the following features: the glass particles are made up by >90 % of non-spherical particles; the geometry of the individual non-spherical particle is characterized by a ratio of length to diameter of 1.1 to 105.Type: ApplicationFiled: December 21, 2005Publication date: March 13, 2008Inventors: Guido Rake, Hildegard Romer, Peter Schreckenberg, Jose Zimmer, Frank Bullesfeld, Jorg Fechner, Cevin Czisch, Udo Fritsching
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Publication number: 20060291528Abstract: A method for melting inorganic materials, preferably glasses and glass-ceramics, in a melting unit with cooled walls is provided. The method includes selecting the temperature of at least one region of the melt is selected in such a way as to be in a range from Teff?20% to Teff+20%, where the temperature Teff is given by the temperature at which the energy consumption per unit weight of the material to be melted is at a minimum, with the throughput having been selected in such a way as to be suitably adapted to the required residence time.Type: ApplicationFiled: April 2, 2003Publication date: December 28, 2006Inventors: Werner Kiefer, Hildegard Romer, Frank-Thomas Lentes, Guido Rake, Volker Ohmstede, Karin Naumann, Michael Leister, Gerhard Nuessle, Rodek Erich, Wolfgang Schmidbauer
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Publication number: 20060144089Abstract: A method and an apparatus for heating a melt in a melting vessel with cooled walls is provided. The melt is heated conductively by current flowing between at least two cooled electrodes, which each replace part of the wall of the melting vessel.Type: ApplicationFiled: November 27, 2003Publication date: July 6, 2006Inventors: Rainer Eichholz, Guido Rake, Volker Ohmstede, Gunter Weidmann, Frank-Thomas Lentes, Thomas Stelle, Ernst-Walter Schafer, Hildegard Romer, Jorg Schollmayer, Holger Hunnius, Frank-Jurgen Druschke
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Patent number: 7024888Abstract: The invention relates to a method for changing glass compositions in continuously operated melting installations which has a significantly shortened melt changeover time and therefore lower costs and in which the glass quality is not adversely affected.Type: GrantFiled: March 23, 2003Date of Patent: April 11, 2006Assignee: Schott GlasInventors: Guido Räke, Volker Ohmstede, Michael Leister, Sybill Nüttgens, Christoph Leuwer
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Patent number: 6889527Abstract: The invention relates to a skull pot (1) for melting, crystallizing or refining inorganic substances. Said pot comprises a pot wall (1.1), a pot bottom (1.2), an induction coil (2) which surrounds the pot wall (1.1) and by means of which high-frequency energy can be coupled into the content of the pot. The pot wall (1.1) is formed by a ring of metal pipes which can be connected to a cooling medium. Slits are embodied between adjacent metal pipes. The bottom (1.2) is provided with a discharge for the melt (3). A sleeve (4) is allocated to the discharge. The admission end (4.1) of the sleeve (4) protrudes far into the inner chamber of the skull pot (1) in such a way that, during use, the melt (3) can be withdrawn through the crystallized bottom layer (3.3) in a controlled manner without the danger of impairing quality.Type: GrantFiled: August 16, 2000Date of Patent: May 10, 2005Assignee: Schott GlasInventors: Hildegard Römer, Uwe Kolberg, Guido Räke
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Publication number: 20050083989Abstract: In order, inter alia, to provide an apparatus and a process for melting inorganic substances which allow a high product quality to be obtained and the technological outlay to be reduced, the invention provides a process and an apparatus in which the volumetric ratios between a melting region and a refining region can be flexibly adapted.Type: ApplicationFiled: July 1, 2004Publication date: April 21, 2005Inventors: Michael Leister, Volker Ohmstede, Andreas Grobeta, Ernst-Walter Schafer, Guido Rake, Hildegard Romer
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Publication number: 20050039492Abstract: The invention describes a method and an apparatus for the rapid melting of in particular high-purity, aggressive and/or high-melting glasses in a skull crucible, in which high-frequency energy is introduced into the contents of the crucible by means of a coil arrangement surrounding the skull crucible, in order to heat the melt, and the batch is laid and the molten glass discharged in the upper region of the crucible, and undissolved constituents of the batch are retained by means of a cooled bridge which is immersed in the melt. According to the invention, the glass is taken off above the coil arrangement (1.3) and is fed for further processing without flowing through the coil region. This has the advantage that simple, conventional components can be used to connect the melting unit to the further-processing stations, and the type of connection can be selected in such a way that it is possible to prevent the quality of the glass from being impaired by connection techniques which are less than optimum.Type: ApplicationFiled: October 1, 2002Publication date: February 24, 2005Inventors: Hildegard Romer, Michael Leister, Uwe Kolberg, Karl Mennemann, Guido Rake, Ernst Schafer, Sybill Nuttgens, Volker Ohmstede
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Publication number: 20050028560Abstract: The invention relates to a method for changing glass compositions in continuously operated melting installations which has a significantly shortened melt changeover time and therefore lower costs and in which the glass quality is not adversely affected.Type: ApplicationFiled: March 23, 2003Publication date: February 10, 2005Inventors: Guido Rake, Volker Ohmstede, Michael Leister, Sybill Nuttgens, Christoph Leuwer
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Patent number: 6817212Abstract: The invention relates to a skull pot for melting or refining glass or glass ceramics, comprising a pot wall (1), a pot base, and an induction coil (3) which surrounds said pot wall and through which high-frequency energy can be coupled into the contents of the pot. The pot wall is made up of a ring of metal pipes (1.1) which can be connected to a cooling medium, slot-type intermediate chambers being provided between adjacent metal pipes. The pot base has a run-off for the melt. The metal pipes (1.1) that form the pot wall (1) arm short-circuited with each other above the base in order to increase the degree of efficiency of the skull pot and especially, in order to even out the temperature profile of the melt throughout the depth of the melt.Type: GrantFiled: April 29, 2002Date of Patent: November 16, 2004Assignee: Schott GLASInventors: Hildegard Römer, Uwe Kolberg, Guido Räke, Werner Kiefer, Michael Kohl, Wolfgang Schmidbauer
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Patent number: 6810689Abstract: The invention relates to a process for the production of a glass melt. For the avoidance of the oxygen reboil the process is equipped with the following process stages or steps: a melting stage a refining stage a homogenizing and conditioning stage; in which before the homogenizing and conditioning stage the melt is heated to a temperature of over 1700° C.; in which polyvalent ions are present in the melt in a proportion of at least 0.5% by wt.Type: GrantFiled: January 25, 2001Date of Patent: November 2, 2004Assignee: Schott GlassInventors: Hildegard Römer, Werner Kiefer, Wolfgang Schmidbauer, Thomas Pfeiffer, Guido Räke
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Publication number: 20040196887Abstract: The invention relates to a device for melting or refining glass or glass ceramics. According to the invention, a device of this type is provided with the following characteristics: a plurality of tubes which are U-shaped and arrange side by side so that they form a cage like skull channel that is open on top, and a high frequency oscillation circuit which comprises an induction coil. The tubes can be connected to a cooling medium. The induction coil wraps around the channel in such a manner that winding sections extend along the lateral walls of the channel.Type: ApplicationFiled: April 15, 2004Publication date: October 7, 2004Applicant: Schott GlassInventors: Wolfgang Schmidbauer, Hildegard Romer, Guido Rake
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Patent number: 6751989Abstract: The invention relates to a device for melting or refining glass or glass ceramics. According to the invention, a device of this type is provided with the following characteristics: a plurality of tubes which are U-shaped and arrange side by side so that they form a cage like skull channel that is open on top, and a high frequency oscillation circuit which comprises an induction coil. The tubes can be connected to a cooling medium. The induction coil wraps around the channel in such a manner that winding sections extend along the lateral walls of the channel.Type: GrantFiled: July 12, 2001Date of Patent: June 22, 2004Assignee: Schott GlasInventors: Wolfgang Schmidbauer, Hildegard Römer, Guido Räke
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Patent number: 6577667Abstract: According to the invention, the skull pot is provided with the following characteristics: a pot wall (1), a bottom (3) and an induction coil (9) which surrounds the pot wall (1) and by means of which high-frequency energy can be coupled into the contents of the pot. The pot wall (1) is made of a ring of metal pipes (1.1) which can be connected to a cooling medium. Slits are embodied between adjacent metal pipes (1.1). The metal pipes (1.1) are bent at a right angle at the upper ends thereof in such a way that said pipes extend towards the outside, when the pot wall (1) is viewed from above, and form a collar (2). The collar (2) is surrounded by an additional wall (upper wall 4). The upper edge of said wall is situated on a higher level than the collar (2) in such a way that the melt covers the collar (2) during operation.Type: GrantFiled: June 12, 2002Date of Patent: June 10, 2003Assignee: Schott GlasInventors: Hildegard Römer, Wolfgang Schmidbauer, Werner Kiefer, Guido Räke, Frank-Thomas Lentes
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Publication number: 20030051510Abstract: A device for the melting of highly pure optical glasses and/or for the treatment of melts is provided. The device is intended for a subsequent refining or homogenization process making use of the skull technique. The device uses a number of coated metal tubes whose surface is free of glass-coloring ions.Type: ApplicationFiled: July 10, 2002Publication date: March 20, 2003Applicant: Schott GlasInventors: Hildegard Romer, Uwe Kolberg, Werner Kiefer, Ernst-Walter Schafer, Guido Rake
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Patent number: 6414982Abstract: A high-frequency device for melting and refining inorganic compounds having a high-frequency oscillation system and a crucible. The high-frequency system includes an induction coil looping around the crucible and at least two oscillator circuits connectable in parallel to the induction coil and providing redundant high frequency energy. Each self-exciting oscillator includes one of the capacitors and the induction coil. The device may further include a power supply, a control cabinet having operating units, and a process control system.Type: GrantFiled: August 18, 2000Date of Patent: July 2, 2002Assignee: Schott GlasInventors: Guido Räke, Michael Kohl, Hildegard Römer, Wolfgang Schmidtbauer, Werner Kiefer
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Publication number: 20010039812Abstract: The invention relates to a process for the production of a glass melt.Type: ApplicationFiled: January 25, 2001Publication date: November 15, 2001Inventors: Hildegard Romer, Werner Kiefer, Wolfgang Schmidbauer, Thomas Pfeiffer, Guido Rake