Patent ID: 7958748
Filing Date: 2011-06-14
Classification: C03B

Abstract:
1. An isopipe for use in a fusion process for the manufacture of sheet glass from molten glass in which a compressive load is applied to the isopipe, comprising: a refractory body comprising: wherein the refractory body further defines a cavity positioned between the upper portion, the root portion, and the outer surfaces that extends along a longitudinal axis between the respective proximal and distal ends, and wherein a cross-sectional area of the cavity varies along the longitudinal length of at least a portion of the cavity, wherein the cavity has a lower surface, wherein at least a portion of the lower surface has a curved shape in the plane of the longitudinal axis, and wherein a center portion of the lower surface is spaced downwardly away from the longitudinal axis of the refractory body relative to the respective ends of the cavity.