Patent ID: 9670086
Date: 2017-06-06
CPC Classifications: C03B

Claim:
1. A method of manufacturing a glass ribbon comprising the steps of: (I) providing a first pull roll apparatus including a first upstream pair of draw rolls and a second pull roll apparatus including a first downstream pair of draw rolls positioned downstream along a draw path from the first upstream pair of draw rolls; (II) forming a glass ribbon with a width extending between a first edge portion and a second edge portion; (III) independently operating the first pull roll apparatus such that at least one of the first upstream pair of draw rolls rotates with a substantially constant torque to draw the first edge portion of the glass ribbon along the draw path; and (IV) independently operating the second pull roll apparatus such that at least one of the first downstream pair of draw rolls rotates with a substantially constant angular velocity to further draw the first edge portion of the glass ribbon along the draw path.