Patent ID: 7699199
Filing Date: 2010-04-20
Classification: B28D,B65G,C03B,C03C,G11B,Y10T

Abstract:
1. A method of manufacturing glass plates of a circular contour from flat glasses involving the following steps: scribing separation lines of a depth T positioning the glass plate on a base pad having an aperture therethrough, wherein the base pad has a predetermined hardness, a defined force F is applied to the flat glass by means of a pressing facility so that a circular scribed line is created along the separation lines and the hardness of the base pad correlates to the force to be applied, the diameter of the aperture always being larger than the diameter of the scribed line, the scribed line being positioned over the aperture, the application of the defined force causing the scribed line to be driven through the entire thickness of the flat glass, the defined force to be applied and the hardness of the base pad being chosen such that, when the scribed line is driven through the entire thickness of the flat glass, the border of the glass plate is largely prevented from breaking off under transverse stresses.