Schott Ag

Schott Glaswerke

Schott Glas

André Witzmann

Ulla Trinks

Volker Trinks

Reinhard Männl

Fabian Wagner

Johann Faderl

Ernst-Walter Schaefer

Thorsten Wilke

Andreas Wirth

Thomas Lenz

Robert Witkowski

Rupert Fehr

Hans Wiedenmann

Otmar Schmittel

Christopher Fritsch

Ulls Trinks

Armin Eisner

Reiner Artmann

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.

Method and apparatus for producing hollow glass body products, and hollow glass body products and their use

A bundle includes five or more cut elongated glass elements. Each cut elongated glass element includes a first end, a cylindrical portion, and a second end. At least one of the following equations is fulfilled: i) (I(max)−I(min))/I(mean)≤4.0×10[μm/μm]; or ii) (I(max)−I(min))/I(mean)≤4.0×10[μm/μm]. I(max) is a maximum center inner diameter of the cylindrical portions of all cut elongated glass elements; I(min) is a minimum center inner diameter of the cylindrical portion of all cut elongated glass elements; I(mean) is a mean of inner diameters at a center of the cylindrical portions of all cut elongated glass elements; I(max) is a maximum continuous inner diameter of the cylindrical portion of any single cut elongated glass element; and I(min) is a minimum continuous inner diameter of the cylindrical portion of the single cut elongated glass element.

Method and system for obtaining cut elongated elements

At least one glass tube has an azimuthal wall thickness deviation WTD of not more than 6.0%, the azimuthal wall thickness deviation being determined based on a lowest wall thickness value and a highest wall thickness value measured within a cross-section of the at least one glass tube, the azimuthal wall thickness deviation WTD being calculated according to the following formula:

Glass tube

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.

Inspection device for cylindrical bodies

A glass tube element having a hollow cylindrical section with a shell having an outer diameter is provided. A first ratio is a difference value to a mean value. The difference value is a difference of a minimal and maximal value of the outer diameter. The mean value is a mean of the minimal and maximal values. A sub-section having a start, an end, and a distance of 1 meter measured along a straight line from the start to the end and intersecting with a center axis of the sub-section at the start and the end. The sub-section having, for every point of the center axis, a shortest distance to the straight line. A second ratio of a specific distance to 1 meter, the specific distance being defined as a largest of all shortest distances. A product of the first and second ratio is smaller than 4×10.

Glass tube element with improved quality

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.

Method for further processing of a glass tube semi-finished product including thermal forming

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.

Method for manufacturing a glass tube semi-finished product or a hollow glass product made therefrom with markings, and uses of the same

A glass tube element having a hollow cylindrical section with a shell having an outer diameter is provided. A first ratio is a difference value to a mean value. The difference value is a difference of a minimal and maximal value of the outer diameter. The mean value is a mean of the minimal and maximal values. A sub-section having a start, an end, and a distance of 1 meter measured along a straight line from the start to the end and intersecting with a center axis of the sub-section at the start and the end. The sub-section having, for every point of the center axis, a shortest distance to the straight line. A second ratio of a specific distance to 1 meter, the specific distance being defined as a largest of all shortest distances. A product of the first and second ratio is smaller than 4&#xd7;10.

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.

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.

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.

Method for manufacturing a hollow glass product from a glass tube semi-finished product having markings, and uses of the same

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.

Method and apparatus for imaging the inner contour of a tube

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.

Method and apparatus for marking glass

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&#xb0; C. during the measuring of the thickness and substantially preventing heat radiation from reaching the focusing device using at least one heat-blocking filter.

Method and apparatus for contactless optical measurement of the thickness of a hot glass body by optical dispersion

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.

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Waldershof, Germany

André Witzmann