Abstract:
The upstream end of a rectangular glass melting furnace is provided with a doghouse of isosceles trapezoidal shape having three openings through which batch material is introduced in discrete elongated masses, or charges by three batch chargers. Two out of three batch chargers in these openings are operated simultaneously in a predetermined sequence. The two side batch chargers operate along angularly related lines of action which converge with one another at a point also located on the line of action of the center batch charger. During operation of the two angularly related side chargers a composite batch, or mass, is formed so as to travel in a downstream direction in the furnace, and by operation of the center batch charger with one or the other of the two side batch chargers a composite mass or batch is directed angularly outwardly with respect to the downstream direction. Thus, operation of three batch chargers, in pairs, in a sequential fashion, provides a convenient means and method for charging a furnace at a rate double the rate possible with a single charger, or with two chargers operated alternately. Further, the three chargers can be operated in alternate pairs at their respective optimum speeds to provide the desired distribution of batch across the furnace.
Abstract:
A FEEDER BOWL IS MOUNTED AT ONE END OF A GLASS FEEDING FURNACE, OR FOREHEARTH, AND A RECIPROCATING MECHANISM FEEDS SUCCESSIVE GOBS OF MOLTEN GLASS DOWNWARDLY THROUGH AN OUTLET SPOUT IN THE BOWL. ELECTRODE MEANS IN THE FEEDER BOWL IS MAINTAINED AT A RELATIVELY HIGH POTENTIAL, AND ELECTRIC CURRENT FLOWS DOWNWARDLY THEREFROM TOWARD A PRIMARY ANNULAR ELECTRODE ADJACENT THE OUTLET SPOUT. AN AUXILIARY ANNULAR ELECTRODE, LOCATED BELOW THE PRIMARY ONE, DEFINES THE OUTLET SPOUT AND IS MAINTAINED AT GROUND POTENTIAL TO PREVENT ARCING BETWEEN THE GLASS GOB BEING EJECTED THROUGH THE SPOUT AND THE GLASS GOB SHEARING APPARATUS NORMALLY PROVIDED BELOW THE FEEDER BOWL.