Schott Ag

Martin Lotze

Clemens Ottermann

Volker Seibert

Thomas Roßmeier

A method for testing the strength of a sheet-like element having two opposite faces and made of hard brittle material under tensile stress is provided. The method includes passing each of the faces of the element over a roller and thereby bending the element so that each of the faces is subjected to a first tensile stress in a portion in which the opposite face is in contact with a surface of the roller; exerting a second tensile force on the element in the direction of advancement so that both faces are subjected to the second tensile stress of at least 2 MPa so that the first and second tensile stresses add up to define a resultant tensile stress; and monitoring the element and determining whether the element has a defined breaking strength equal to the resultant tensile stress or whether the element breaks under the resultant tensile stress.

Apparatus for testing the strength of sheets made of hard brittle material under tensile stress

A method and an apparatus for stabilizing the position of a sheet-like element made of hard brittle material during transportation thereof along a transport path is provided in which the element is guided through a roller chicane having three rollers.

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Nieder-Olm, Germany

Martin Lotze