Patent ID: 9512025
Filing Date: 2016-12-06
CPC Classification: C03B

Claim Text:
1. An apparatus for making a glass ribbon comprising: a forming wedge including a pair of downwardly inclined forming surface portions converging along a downstream direction to form a root; an edge director intersecting with the pair of downwardly inclined forming surface portions; a plurality of edge rollers positioned downstream from the root and edge director, wherein the plurality of edge rollers are positioned to engage an edge portion of the glass ribbon; a housing enclosing the forming wedge, edge director and the plurality of edge rollers; and a heating cartridge removably positioned in a port of the housing below the edge director, the heating cartridge comprising an enclosure having a heat directing surface that is inclined at an angle of less than about 90° with respect to a bottom surface of the enclosure, the heat directing surface comprising at least one heating element positioned on or adjacent to a face thereof, wherein the heating cartridge is oriented such that the heat directing surface faces the edge director, a view factor from the heat directing surface is greater at the edge director than at the plurality of edge rollers, and a lower edge of the heat directing surface and the bottom surface of the heating cartridge are at least partially positioned between the edge director and the plurality of edge rollers to thermally shield the edge director from the plurality of edge rollers.