Patent ID: 8627684
Filing Date: 2014-01-14
Classification: C03B

Abstract:
1. A method for manufacturing a glass sheet, said method comprising the steps of: a) melting batch materials and forming the glass sheet; b) delivering the glass sheet to a pull roll apparatus; c) drawing the glass sheet and creating a cross-tension in the glass sheet using the pull roll apparatus which comprises: d) monitoring the torque of at least one of the pull rolls in the pull roll pair; e) monitoring the torque of at least one of the stub rolls in the first stub roll pair and at least one of the stub rolls in the second stub roll pair; f) controlling the torque of at least one of the pull rolls in the pull roll pair; and g) controlling the torque of at least one of the stub rolls in the first stub roll pair and the torque of at least one of the stub rolls in the second stub roll pair to be a predetermined percentage of the torque of the at least one pull roll.