Patent ID: 8978417
Filing Date: 2015-03-17
Classification: B65G,C03B

Abstract:
1. A method of separating a glass sheet from a ribbon of glass comprising: drawing a glass ribbon from a forming body, the glass ribbon comprising a central portion and first and second edge portions; irradiating a first surface of the edge portion with a pulsed laser beam from a first laser at a first position on the first surface, the pulsed laser beam comprising a depth of focus, and a focus point of the pulsed laser beam is positioned outside the glass ribbon a distance from a second surface of the first edge portion opposite the first surface within the laser beam forming a defect channel through at least a portion of a thickness of the glass ribbon at the first position; traversing the laser in a direction parallel to a surface of the central portion and repeating the irradiating with the first laser to form a plurality of discrete defect channels in the second edge portion along a line perpendicular to the outer edge; scoring the central portion of the glass ribbon, wherein a score line formed by the scoring aligns with the line of defect channels; and separating the glass ribbon along the score line.