Abstract: The invention relates to working molten glass in tank furnaces for continuous production. According to the process of the invention, the vitrifiable material being brought first to the molten bath state in a zone upstream from the tank, and said bath then having access to the successive downstream zones allocated to the other phases of the process of working the glass through at least one tank portion comprising a section reduction of the type usually called a neck, there is generated at the upper level of the opening available to the glass by said neck a glass current directed from downstream to upstream of said neck. The invention proves to be especially advantageous for electric melting furnaces with large production capacity.

Abstract: Device for continuous manufacture of fined glass in which the flow of molten material is transferred from a melting compartment (1) to a fining compartment (2) by a submerged throat (8), the fining compartment (2) comprising a chute (14) carrying the material, in an overall ascending current, and delivering it to the conditioning station (3), in a surface current, heating means (16-19) distributed in the chute (14) bringing the material to the usual debubbling temperature.This device is advantageously combined with a cupola type electric melting furnace, particularly for producing glasses with very volatile ingredients.