Patents by Inventor Andre Witzmann
Andre 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).
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Publication number: 20210309556Abstract: A glass tube element is provided that includes hollow cylindrical section that has a shell enclosing a lumen and a path extending on a surface of the shell facing away from the lumen. The path extends across a first area of the shell where the stress values are within a first interval. The path also extends across a second area of the shell where the stress values are within a second interval.Type: ApplicationFiled: April 2, 2021Publication date: October 7, 2021Applicant: SCHOTT AGInventors: Volker Trinks, André Witzmann
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Publication number: 20210310587Abstract: A glass tube element having hollow cylindrical section that has a shell enclosing a lumen and extends along a main extension and an optical delay of a light ray. The shell has a surface facing away from the lumen. The optical delay has values that all fall within a range having a size of between 3 and 30 nm. The optical delay being an optical measurement of the glass tube element by the light ray extending along a measurement path in a direction of perpendicular to the main extension and tangent to a surface of the shell. The measurement path touches the surface for different measurements at different positions each having a different azimuth angle within a cylindrical coordinate system fixedly attached to the glass tube element and having an origin on a center axis of the glass tube element.Type: ApplicationFiled: April 2, 2021Publication date: October 7, 2021Applicant: SCHOTT AGInventors: Volker Trinks, André Witzmann
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Publication number: 20210207953Abstract: An inspection device for a cylindrical body, a bundle of cylindrical bodies having improved straightness, and methods of inspecting are provided. The inspection device includes a transport device, a rotation device, and a measuring device. The transport device moves the cylindrical body relative to the measuring device. The rotation device and the transport device rotate the cylindrical body while the cylindrical body is moving relative to the measuring device. The measuring device measures the cylindrical body while the cylindrical body is moving relative to the measuring device and while the cylindrical body is rotating.Type: ApplicationFiled: January 8, 2021Publication date: July 8, 2021Applicant: SCHOTT AGInventors: André Witzmann, Armin Eisner, Robert Witkowski
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Publication number: 20200369551Abstract: 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: ApplicationFiled: May 22, 2020Publication date: November 26, 2020Applicant: SCHOTT AGInventors: Andreas Ortner, Ulla Trinks, Fabian Wagner, Carsten Etz, Daniela Seiler, Michael Kluge, Peter Czepelka, Frank-Thomas Lentes, André Witzmann, Reiner Artmann
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Patent number: 10670855Abstract: 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: GrantFiled: September 1, 2017Date of Patent: June 2, 2020Assignee: SCHOTT AGInventors: Hans Wiedenmann, André Witzmann
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Publication number: 20190322565Abstract: 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: ApplicationFiled: April 23, 2019Publication date: October 24, 2019Applicant: Schott AGInventors: André Witzmann, Fabian Wagner
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Publication number: 20180168928Abstract: 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: ApplicationFiled: December 8, 2017Publication date: June 21, 2018Applicant: SCHOTT AGInventors: André Witzmann, Ulla Trinks, Reinhard Männl
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Publication number: 20180170804Abstract: 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: ApplicationFiled: December 8, 2017Publication date: June 21, 2018Applicant: SCHOTT AGInventors: André Witzmann, Ulla Trinks, Reinhard Männl
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Publication number: 20180162765Abstract: 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: ApplicationFiled: December 8, 2017Publication date: June 14, 2018Applicant: SCHOTT AGInventors: André Witzmann, Andreas Wirth, Ulla Trinks
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Publication number: 20180164226Abstract: 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: ApplicationFiled: December 8, 2017Publication date: June 14, 2018Applicant: SCHOTT AGInventors: André Witzmann, Andreas Wirth, Ulla Trinks
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Publication number: 20180059401Abstract: 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: ApplicationFiled: September 1, 2017Publication date: March 1, 2018Applicant: SCHOTT AGInventors: Hans Wiedenmann, André Witzmann
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Patent number: 8872870Abstract: 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: GrantFiled: August 30, 2011Date of Patent: October 28, 2014Assignee: Schott AGInventors: Andre Witzmann, Ulla Trinks
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Publication number: 20130169732Abstract: 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: ApplicationFiled: August 30, 2011Publication date: July 4, 2013Applicant: SCHOTT AGInventors: Andre Witzmann, Ulla Trinks
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Patent number: 7414740Abstract: 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: GrantFiled: July 13, 2005Date of Patent: August 19, 2008Assignee: Schott AGInventors: Thorsten Wilke, Andre Witzmann, Rupert Fehr, Johann Faderl, Otmar Schmittel, Ernst-Walter Schaefer, Christopher Fritsch
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Publication number: 20070141348Abstract: 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: ApplicationFiled: March 26, 2005Publication date: June 21, 2007Inventors: Andre Witzmann, Ulla Trinks, Reiner Artmann
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Publication number: 20060012804Abstract: 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: ApplicationFiled: July 13, 2005Publication date: January 19, 2006Inventors: Thorsten Wilke, Andre Witzmann, Rupert Fehr, Johann Faderl, Otmar Schmittel, Ernst-Walter Schaefer, Christopher Fritsch
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Publication number: 20040025539Abstract: 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: ApplicationFiled: August 19, 2003Publication date: February 12, 2004Inventors: Erich Fischer, Alexander Hummer, Volker Trinks, Rupert Fehr, Alfons Wolfrum, Markus Reindl, Gottfried Haas, Andre Witzmann, Ulla Trinks, Hubertus Kramer, Klaus Rustler
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Patent number: 6674043Abstract: 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: GrantFiled: May 6, 2002Date of Patent: January 6, 2004Assignee: Schott GlasInventors: Ulla Trinks, André Witzmann
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Publication number: 20030029849Abstract: 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: ApplicationFiled: May 6, 2002Publication date: February 13, 2003Inventors: Ulla Trinks, Andre Witzmann
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Patent number: 6055829Abstract: 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: GrantFiled: July 7, 1998Date of Patent: May 2, 2000Assignee: Schott GlasInventors: Andre Witzmann, Ulls Trinks