Method for producing an isopipe having a step at the compression end and a glass ribbon

摘要

The disclosure relates to an apparatus for making a glass ribbon, the apparatus comprising a trough-shaped upper portion having two trough walls and a trough bottom, a wedge-shaped lower portion, a delivery end and an edge step (243) configured to receive molten glass. And a molded body (100) having a compression end (237) with an end cap (205) coupled to the compression end (237) and extending toward the upper surface of the edge step (243), of the edge step (243) The height is greater than the height of the two trough walls at a point close to the compression end (237). The specification also discloses a method of making a glass ribbon using such an apparatus. This minimizes the glass that flows into the end cap and exceeds the compression end of the compact and minimizes gob formation.