Abstract: A forehearth for molten glass having at least one cooling zone which includes a trough and a roof over the trough. A pair of spaced projections extending downwardly from the roof to define a central channel over the molten glass and side channels over the respective side portions of the molten glass. The roof has an area of reduced thickness in the portion over the central channel. An enclosed upper cooling channel extends longitudinally over the area of reduced thickness and has an inlet and an outlet spaced from the inlet, and heating means are provided for each side portion of the forehearth.

Abstract: A forehearth for the conveyance of molten glass has at least one cooling zone which includes a trough and a roof over the trough. A pair of spaced projections extend downwardly from the roof to define in the space below the roof a central channel over the central portion of the stream of molten glass and side channels over respective side portions of the stream of glass. The roof has at least one area of reduced thickness in the portion over the central channel. An enclosed upper cooling channel extends longitudinally of the forehearth over the area of reduced thickness and has an inlet and an outlet spaced longitudinally from the inlet. Heating means are provided for applying heat to each side portion of the stream of glass.