Forming glass sheets with improved shape stability

A method of improving shape stability in a glass ribbon drawn from an isopipe overflowing with molten glass, the method comprising:

• forming the glass ribbon with a curved isopipe having a curvature in a plane extending generally perpendicular to and substantially transversely across the glass ribbon, thereby inducing a curvature transversely across the glass ribbon in a plane extending generally perpendicular to the glass ribbon during a downdraw process, thereby creating a curved glass ribbon;
• and
• cooling the curved glass ribbon through a glass transition temperature of the glass ribbon so that the curvature is set in the curved glass ribbon.

A method of improving shape stability in a glass ribbon drawn from an isopipe overflowing with molten glass, the method comprising:

• applying electrostatic force to a first side of the glass ribbon, thereby generating an electric field differential across the glass ribbon and inducing a curvature transversely across the glass ribbon in a plane extending generally perpendicular to the glass ribbon during a downdraw process, thereby creating a curved glass ribbon;
• and
• cooling the curved glass ribbon through a glass transition temperature of the glass ribbon so that the curvature is set in the curved glass ribbon.