Apparatus and methods for separating edge portions from a glass ribbon

A method of separating an edge portion from a moving glass ribbon, comprising:

• forming a glass ribbon with a forming apparatus, the glass ribbon moving along a draw path in a draw direction along a draw plane, the glass ribbon comprising a central portion having a first thickness, and a first edge portion including an outside edge of the glass ribbon, the first edge portion adjacent the central portion and comprising a second thickness greater than the first thickness;
• scoring the glass ribbon with a scoring tool to form a score along a length of the glass ribbon extending in the draw direction a predetermined distance from the outside edge while supporting the glass ribbon with a backing roller, wherein the scoring tool forces the glass ribbon against the backing roller to produce the score between the scoring tool and the backing roller while the glass ribbon moves along the draw path in the draw direction;
• pinching the central portion of the glass ribbon during the scoring between a pair of stabilizing rollers inboard of the score;
• and
• contacting the edge portion of the glass ribbon downstream of the scoring tool with a separation roller, the separation roller applying a force to the edge portion outboard of the score that forms a tensile stress across the score and causes the edge portion to separate from the central portion downstream of the scoring tool, thereby forming a separated edge portion.