Patent ID: 9643873
Date: 2017-05-09
CPC Classifications: C03B

Claim:
1. A method for manufacturing glass sheets using an apparatus that includes a trough for receiving molten glass that has sides attached to a wedged shaped sheet forming block that has downwardly sloping sides converging at the bottom of the wedge such that a glass sheet is formed when molten glass flows over the sides of the trough, down the downwardly sloping sides of the wedged shaped sheet forming block and meets at the bottom of wedge, wherein the method comprises the step of: moving a surface of the forming block relative to at least one end edge director fixed to a support structure at that end of the forming block as the forming block changes shape due to thermal creep without changing a distance between a far end edge director at a far end of the forming block and an inflow end edge director at an inflow end of the forming block, such that a width of a glass sheet does not change as a consequence of the surface of the forming block moving relative to the at least one edge director, and then further comprising the step of adjusting a distance between the inflow end edge director and the far end edge director relative to a moving surface of the forming block as the forming block changes shape due to thermal creep, such that a width of a glass sheet is changed.