method for influencing the temperature of molten glass in the tank of vitrification and ring out of drops of a feeding device

摘要

A melt of vitreous material is heated uniformly by means of a heat tube or heat pipe, wherein circulation of a heat-exchange medium is effected independently of gravitational forces and exclusively as a function of a temperature differential existing within the heat tube. Various apparatus for accommodating and extruding melt of vitreous material are disclosed, and utilize the heat tube in different forms for controlling the temperature of the melt in desired manner.