Schott Ag

Jürgen Vogt

Andreas Habeck

Thomas Wiegel

Thomas Rossmeier

Andreas Ortner

Clemens Ottermann

Ulrich Lange

Kurt Nattermann

Rainer Liebald

Thomas Roßmeier

Stephan Zachmann

Dirk Förtsch

Markus Heiss-Chouquet

Stephan Behle

Holger Wegener

Feng He

Matthias Jotz

Ning Da

Pengxiang Qian

Georg Helmut Sparschuh

Markus Heiß-Chouquet

Gregor Kübart

Christian Breitbach

Rainer Schwertfeger

Angelika Ullmann

Frank Macherey

Marius Necel

Ulrich Battmer

Uwe Wilkens

Dirk Sprenger

Georg Sparschuh

A method for producing long-term bendable glass material includes: bending a glass material in a bending radius in a range of 1 mm to 10mm; storing the bent glass material for a time period of at least 1 day; inspecting at least a portion of the bent glass material for damage after the storing; and classifying the inspected bent glass material as a reject if damage is detected or as a long-term bendable glass material if no damage is detected.

Long-term bendable glass material, and method for the production of a long-term bendable glass material

An improved method and an improved apparatus are provided for producing a thin glass ribbon, which provide borders at the edges of the ribbon. The edges formed are of high mechanical quality and a formation of new secondary borders after the severing or at least the thickness of such secondary borders is reduced compared to the original borders. The method includes drawing the thin glass ribbon from a molten glass or from a preform, severing the borders, and cooling the resulting glass ribbon. The severing is effected at a location along the moving direction of the thin glass ribbon and at a time at which during the cooling of the thin glass ribbon the viscosity of the glass is in a range from 10dPa·s to 10dPa·s, so that the edges of the thin glass ribbon newly produced by the severing of the borders are rounded off.

Method and apparatus for producing a thin glass ribbon, and thin glass ribbon produced according to such method

A method for producing thing glass strips is provided that avoids camber defects. The method includes using a glass strip forming device that has a drawing device; drawing, using the drawing device, the thin glass strip away from the glass strip forming device; measuring, using a measuring device, variables that are dependent on a differing length of edges of the thin glass strip at at least two measurement locations spaced apart transversely to a longitudinal extension of the thin glass strip; determining a difference or a quotient of the variables. The difference or the quotient is used to determine a control variable by which the glass strip forming device is controlled so as to counteract a difference in velocities of the thin glass strip between the two opposite edges.

Method and apparatus for reducing the camber in thin glasses

A glass roll includes at least one glass film and one intermediate material one on top of the other in at least two layers onto a winding core. The glass film layers are held in place by the intermediate material layers. The glass roll is produced with a method including provision of a glass film, a winding core and a compressible intermediate material. At least one inside layer of the intermediate material is wound onto the winding core. The glass film and the intermediate material are wound onto the winding core in such a manner that the glass film is wound onto the winding core in alternating layers with the intermediate material. The intermediate material and/or the glass film is wound at a tensile stress acting in a longitudinal direction which causes a compression of the intermediate material and holds the glass film end in place on the glass roll.

Pre-stressed glass roll

A glass ribbon in the form of a glass roll is provided that is optimized with respect to the requirements of a long service life and at the same time compact dimensions. A bending radius on the inner side of the thin glass roll is determined by performing breakage tests on samples of the glass material, statistical parameters are determined on the basis of the breakage tests, and the statistical parameters are converted into a range of bending radii which meet the requirements on service life and the most compact dimensions possible of the thin glass roll.

Thin glass roll and method for producing same

An improved method and an improved apparatus are provided for producing a thin glass ribbon, which provide borders at the edges of the ribbon. The edges formed are of high mechanical quality and a formation of new secondary borders after the severing or at least the thickness of such secondary borders is reduced compared to the original borders. The method includes drawing the thin glass ribbon from a molten glass or from a preform, severing the borders, and cooling the resulting glass ribbon. The severing is effected at a location along the moving direction of the thin glass ribbon and at a time at which during the cooling of the thin glass ribbon the viscosity of the glass is in a range from 10dPa&#xb7;s to 10dPa&#xb7;s, so that the edges of the thin glass ribbon newly produced by the severing of the borders are rounded off.

A method for separating a thin glass, in which method the thin glass is progressively heated along a path which forms a parting line, wherein the heating of the glass is realized by way of the energy of at least one energy source within an area of action of the energy source on the thin glass, and, by way of a temperature gradient of the glass heated by way of the at least one energy source in relation to the surrounding glass, a mechanical stress is generated in the glass, by way of which mechanical stress, a crack propagates, following the mechanical stress, along the parting line.

Method and device for continuous separation of glass

A method for cutting a thin glass including the steps of guiding, by a transport device, the thin glass ribbon over a levitation support, and directing, within a range of the levitation support, a laser beam onto the thin glass ribbon, which heats up the thin glass ribbon at an impingement point of the laser beam. The method also includes the step of blowing, by a cooling jet generator, a cooling fluid onto the track heated by the laser beam so that a region heated by the laser beam is cooled down and a mechanical stress is created. The cooling fluid contains vapor of a liquid at a saturation ratio of at least 0.5 or a plurality of liquid droplets. The liquid droplets form a contact angle on a surface of the thin glass ribbon which is smaller than that of water on the same surface.

Method and apparatus for continuously cutting glass

A glass roll, as well as a device and a method for manufacturing the glass roll are provided. The glass roll includes a glass ribbon having a thickness, a length in an x-direction, and a width in a y-direction. The glass ribbon has at least one defect site at a position, as well as at least one error mark disposed on the glass ribbon, and is wound up into a glass roll.

Glass roll, product having a glass roll, device and method for the manufacture thereof

A method and apparatus for scoring thin glass for the purpose of score and break separation as well as an accordingly prepared scored thin glass are provided. The scoring tool is pressed onto the thin glass and drawn along the scoring line with an adjusted scoring contact pressure force as a vertical scoring force component. This permits to production of prescored ultrathin glass of Knoop hardness from 350 to 650 with a score depth from 1/20 to &#x2158; of the material thickness.

Method and apparatus for scoring thin glass and scored thin glass

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Oberheimbach, Germany

Jürgen Vogt