Patent ID: 9284209
Filing Date: 2016-03-15
CPC Classification: C03B

Claim Text:
1. An apparatus for forming a glass sheet comprising: a forming wedge comprising weirs at the top of the forming wedge and forming surfaces below the weirs that converge to a root at the bottom of the forming wedge; a plurality of heating elements disposed proximate to the forming wedge, at least one of the heating elements comprising a center portion disposed between end portions, wherein the end portions of the at least one heating element have a higher resistance than the center portion of the at least one heating element and the end portions of the at least one heating element radiate a greater amount of heat than the center portion of the at least one heating element; an enclosure disposed about the forming wedge, the enclosure comprising an inner wall separating the forming wedge from the plurality of heating elements; and an insulating thermal barrier positioned in the enclosure and horizontally disposed between an adjacent pair of heating elements, wherein the insulating thermal barrier thermally isolates heating elements positioned above the insulating thermal barrier from heating elements positioned below the thermally insulating barrier.