METHOD OF CONTROLLING THE TEMPERATUR OF A GLASS PLATE IN AN OVEN WITH SEVERAL COMPARTMENTS

摘要

The invention relates to a process for regulating the temperature of a glass sheet in a furnace as the glass sheet is moved at a determined rate and heated according to a preestablished program. The furnace is characterized by only slight thermal inertia thereby to provide rapid adjustment of the internal temperature within each of several cells. The physical presence of the glass sheet is checked in synchronization with its step-by-step advance at least at one location upstream of one furnace cell to correct the regulation of the radiation heating output should these be a variance from that of the preestablished program. The process may be carried out with limited fabrication rejects by virtue of the capability of regulation of variations of the conveying rate or as required due to gaps in the succession of glass sheets being treated.