Patents by Inventor André Witzmann

André Witzmann 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).

  • Publication number: 20200369551
    Abstract: A method for processing glass elements is provided. The method includes introducing a perforation line for parting a glass element introduced into the glass element during or after a hot processing process at an elevated temperature of at least 100° C. Spaced-apart filamentary flaws are introduced into the glass element along the predetermined course of the perforation line by a pulsed laser beam of an ultrashort pulse laser, and, during or after the introduction of the filamentary flaws, the glass element is cooled down so as to produce a temperature gradient, which induces a mechanical stress at the filamentary flaws, whereby the breaking force required for parting the glass element along the perforation line is reduced.
    Type: Application
    Filed: May 22, 2020
    Publication date: November 26, 2020
    Applicant: SCHOTT AG
    Inventors: Andreas Ortner, Ulla Trinks, Fabian Wagner, Carsten Etz, Daniela Seiler, Michael Kluge, Peter Czepelka, Frank-Thomas Lentes, André Witzmann, Reiner Artmann
  • Patent number: 10670855
    Abstract: An apparatus and to a method for imaging the inner contour of a tube are provided. The method includes radiating light having a first polarization direction onto a first tube end in the longitudinal direction of the tube; reflecting the light downstream of a second tube end, wherein the light that is returning through the tube due to the reflection has a second polarization direction that is orthogonal with respect to the first polarization direction; and filtering the returning light with a polarization filter to transmit only the returning light.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: June 2, 2020
    Assignee: SCHOTT AG
    Inventors: Hans Wiedenmann, André Witzmann
  • Publication number: 20190322565
    Abstract: A method and apparatus is provided for producing a hollow glass body product including a hollow glass body having an outer surface with a first end portion and a second end portion, the first end portion being sealed by a first bottom and the second end portion being sealed by a second bottom. A plurality of spaced apart filamentary defects are provided in the outer surface and at least part of the filamentary defects form open passages connecting an interior of the hollow glass body to the outer surface thereof. Each individual passage has a diameter in the micrometer range between more than 0 micrometers and less than 50 micrometers. A plurality of the micrometer range-sized open passages provides a total cross-sectional area sufficiently large for venting and/or pressure equalization.
    Type: Application
    Filed: April 23, 2019
    Publication date: October 24, 2019
    Applicant: Schott AG
    Inventors: André Witzmann, Fabian Wagner
  • Publication number: 20180168928
    Abstract: A glass tube semi-finished product or a hollow glass product manufactured from the glass tube semi-finished product is provided with a first marking with information regarding origin and manufacture of the glass tube semi-finished product and a second marking, the information of which second marking is linked to the information of the first marking, so as to enable a determination regarding authenticity of the glass tube semi-finished product, origin of the glass tube semi-finished product, and/or origin of an apparatus with which the first and/or second marking was generated on the glass tube semi-finished product. The first marking is a marking that is produced at temperatures above the transformation temperature of the glass in a counterfeit-proof manner. The combination of two markings provides a high level of protection against counterfeiting.
    Type: Application
    Filed: December 8, 2017
    Publication date: June 21, 2018
    Applicant: SCHOTT AG
    Inventors: André Witzmann, Ulla Trinks, Reinhard Männl
  • Publication number: 20180170804
    Abstract: A glass tube semi-finished product or a hollow glass product manufactured from the glass tube semi-finished product is provided with a first marking with information on the origin and/or tube-specific production data of the glass tube semi-finished product, which marking is read from the hollow glass product after its manufacture to determine the origin and/or the tube-specific production data of the glass tube semi-finished product, e.g., to identify the semi-finished glass tube from which the hollow glass product has been made, and/or trace the tube-specific production data of this glass tube semi-finished product. This means that the entire supply chain for the hollow glass product from the supplier of the originally used glass tube semi-finished product up to the end product can be determined. The physical and chemical characteristics of the glass tube semi-finished product are not altered for producing the first marking.
    Type: Application
    Filed: December 8, 2017
    Publication date: June 21, 2018
    Applicant: SCHOTT AG
    Inventors: André Witzmann, Ulla Trinks, Reinhard Männl
  • Publication number: 20180164226
    Abstract: A method for further processing a glass tube semi-finished product includes: providing the glass tube semi-finished product, along with defect data for the glass tube semi-finished product; reading the defect data for the glass tube semi-finished product; and further processing the glass tube semi-finished product, for example by cutting to length or sorting out. The further processing of the glass tube semi-finished product is adapted to the defect data, which were read out for the glass tube semi-finished product. In this way, the further processing can be more efficiently adapted to the respective characteristics of a glass tube semi-finished product to be processed or a specific sub-section thereof, and the relevant defects of the respective glass tube semi-finished product do not need to be determined or measured again.
    Type: Application
    Filed: December 8, 2017
    Publication date: June 14, 2018
    Applicant: SCHOTT AG
    Inventors: André Witzmann, Andreas Wirth, Ulla Trinks
  • Publication number: 20180162765
    Abstract: A method for further processing of a glass tube semi-finished product includes: providing the glass tube semi-finished product, along with tube-specific data for the glass tube semi-finished product; reading the tube-specific data for the glass tube semi-finished product; and further processing of the glass tube semi-finished product including a step of thermal forming carried out at least in sections. At least one process parameter during the further processing of the glass tube semi-finished product including the step of thermal forming carried out at least in sections is controlled as a function of the tube-specific data for the glass tube semi-finished product. In this way, the further processing can be matched more efficiently to the particular characteristics of a glass tube semi-finished product to be processed or a particular subsection thereof, and the relevant characteristics of the particular glass tube semi-finished product do not need to be measured again.
    Type: Application
    Filed: December 8, 2017
    Publication date: June 14, 2018
    Applicant: SCHOTT AG
    Inventors: André Witzmann, Andreas Wirth, Ulla Trinks
  • Publication number: 20180059401
    Abstract: An apparatus and to a method for imaging the inner contour of a tube are provided. The method includes radiating light having a first polarization direction onto a first tube end in the longitudinal direction of the tube; reflecting the light downstream of a second tube end, wherein the light that is returning through the tube due to the reflection has a second polarization direction that is orthogonal with respect to the first polarization direction; and filtering the returning light with a polarization filter to transmit only the returning light.
    Type: Application
    Filed: September 1, 2017
    Publication date: March 1, 2018
    Applicant: SCHOTT AG
    Inventors: Hans Wiedenmann, André Witzmann
  • Patent number: 8872870
    Abstract: In a method and apparatus for marking glass or a glass-like material a writing laser beam and the glass or the material are moved relative to each other in order to form an array of marks on the glass surface or material surface consisting of a plurality of discrete marks which are formed in discrete marking steps and are distributed along at least one direction. Marks directly adjacent to each other in a predetermined direction are formed in two marking steps, which are not carried out directly in succession one after the other. Thus, at least two series of marks are produced in the predetermined direction, wherein said marks are spaced at regular intervals from each other and are interleaved in the predetermined direction. As a result, and because of the temperature regime according to the invention during encoding, a particularly low-stress, crack-free marking of glass can be accomplished.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: October 28, 2014
    Assignee: Schott AG
    Inventors: Andre Witzmann, Ulla Trinks
  • Publication number: 20130169732
    Abstract: In a method and apparatus for marking glass or a glass-like material a writing laser beam and the glass or the material are moved relative to each other in order to form an array of marks on the glass surface or material surface consisting of a plurality of discrete marks which are formed in discrete marking steps and are distributed along at least one direction. Marks directly adjacent to each other in a predetermined direction are formed in two marking steps, which are not carried out directly in succession one after the other. Thus, at least two series of marks are produced in the predetermined direction, wherein said marks are spaced at regular intervals from each other and are interleaved in the predetermined direction. As a result, and because of the temperature regime according to the invention during encoding, a particularly low-stress, crack-free marking of glass can be accomplished.
    Type: Application
    Filed: August 30, 2011
    Publication date: July 4, 2013
    Applicant: SCHOTT AG
    Inventors: Andre Witzmann, Ulla Trinks
  • Patent number: 7414740
    Abstract: The method measures the thickness of a hot glass body without direct contact with the glass body and is based on chromatic aberration. This method includes focusing a light beam from a light source on the hot glass body using a focusing device immediately after formation; conducting reflected light from the glass body into a spectrometer to obtain a reflected light spectrum; finding two wavelengths of the reflected light from the front side and the rear side of the glass body respectively at which reflected light intensities are maximum; determining the thickness of the glass body from the difference between the two wavelengths; maintaining the focusing device at a temperature below 120° C. during the measuring of the thickness and substantially preventing heat radiation from reaching the focusing device using at least one heat-blocking filter.
    Type: Grant
    Filed: July 13, 2005
    Date of Patent: August 19, 2008
    Assignee: Schott AG
    Inventors: Thorsten Wilke, Andre Witzmann, Rupert Fehr, Johann Faderl, Otmar Schmittel, Ernst-Walter Schaefer, Christopher Fritsch
  • Publication number: 20070141348
    Abstract: The invention relates to a method for treating refractory material which consists of fireclay, light-weight refractory bricks, silimanite bricks, zirconium and zirconium-containing bricks, and fusion-cast bricks with compositions from Al2O3, SiO2, ZrO2 and/or MgO or CrO in order to render it corrosion-resistant so that it withstands contact with a glass melt for a longer time. The surface of the material is treated by laser radiation, forming a vitreous surface layer having a thickness of 100 to 1000 ?m.
    Type: Application
    Filed: March 26, 2005
    Publication date: June 21, 2007
    Inventors: Andre Witzmann, Ulla Trinks, Reiner Artmann
  • Publication number: 20060012804
    Abstract: The method measures the thickness of a hot glass body without direct contact with the glass body and is based on chromatic aberration. This method includes focusing a light beam from a light source on the hot glass body using a focusing device immediately after formation; conducting reflected light from the glass body into a spectrometer to obtain a reflected light spectrum; finding two wavelengths of the reflected light from the front side and the rear side of the glass body respectively at which reflected light intensities are maximum; determining the thickness of the glass body from the difference between the two wavelengths; maintaining the focusing device at a temperature below 120° C. during the measuring of the thickness and substantially preventing heat radiation from reaching the focusing device using at least one heat-blocking filter.
    Type: Application
    Filed: July 13, 2005
    Publication date: January 19, 2006
    Inventors: Thorsten Wilke, Andre Witzmann, Rupert Fehr, Johann Faderl, Otmar Schmittel, Ernst-Walter Schaefer, Christopher Fritsch
  • Publication number: 20040025539
    Abstract: The invention relates to a method for cutting glass tubes, characterised by the following steps: a glass strand is drawn; a heating device is driven synchronously with the glass strand and is directed towards the region of a desired separation point; the glass strand is drawn in the region of the desired separation point; a separation device is driven synchronously with the glass strand; the separation device is actuated in such a way that it severs the glass strand at the desired separation point.
    Type: Application
    Filed: August 19, 2003
    Publication date: February 12, 2004
    Inventors: Erich Fischer, Alexander Hummer, Volker Trinks, Rupert Fehr, Alfons Wolfrum, Markus Reindl, Gottfried Haas, Andre Witzmann, Ulla Trinks, Hubertus Kramer, Klaus Rustler
  • Patent number: 6674043
    Abstract: In an apparatus and a method for marking glass with a laser, the glass is first brought to a temperature above the transformation temperature of the glass. The glass is then acted upon by a laser pulse which produces a mark on the surface of the glass. The peak power of the laser pulse is preferably selected so that it is merely a thermal interaction with the glass surface which occurs. This has the advantage that the material properties of the marked glass remain unchanged compared with the unmarked product.
    Type: Grant
    Filed: May 6, 2002
    Date of Patent: January 6, 2004
    Assignee: Schott Glas
    Inventors: Ulla Trinks, André Witzmann
  • Publication number: 20030029849
    Abstract: In an apparatus and a method for marking glass with a laser, the glass is first brought to a temperature above the transformation temperature of the glass. The glass is then acted upon by a laser pulse which produces a mark on the surface of the glass. The peak power of the laser pulse is preferably selected so that it is merely a thermal interaction with the glass surface which occurs. This has the advantage that the material properties of the marked glass remain unchanged compared with the unmarked product.
    Type: Application
    Filed: May 6, 2002
    Publication date: February 13, 2003
    Inventors: Ulla Trinks, Andre Witzmann
  • Patent number: 6055829
    Abstract: A process is described for producing a desired breaking point for breaking the glass wall of a glass body, in particular a break-open ampule or a tube, or for separating parts out of a pane of glass by generating microcracks in the breaking zone, in which process the microcracks are generated in the interior of the glass wall or the pane of glass.
    Type: Grant
    Filed: July 7, 1998
    Date of Patent: May 2, 2000
    Assignee: Schott Glas
    Inventors: Andre Witzmann, Ulls Trinks
  • Patent number: 5902368
    Abstract: Disclosed is a method for the heat-softened severance of thin-walled glass tubes or plates with a wall thickness of no more than 0.2 mm, wherein the glass is softened on a width of no more than 0.4 mm, the softened area is reduced by drawing to a wall thickness of no more than 0.05 mm, and then is separated by additional heating in the drawn-out area.
    Type: Grant
    Filed: January 15, 1998
    Date of Patent: May 11, 1999
    Assignee: Schott-Glaswerke
    Inventors: Andre Witzmann, Ulla Trinks