GLASS SHEET BENDING

摘要

The present invention relates to a technique for bending glass sheets by gravity, in which the sheets, which are placed in a frame for imparting them the final peripheral shape, are heated during a first step to a temperature close to the softening temperature by passing them in a tunnel furnace essentially heated with resistors in which the glass sheets optionally experience a first or partial bending, and in which during a second step, and optionally simultaneously with the completion of the bending of the first step, the sheets are submitted to the local and controlled application of microwaves for increasing the temperate and facilitating the bending in the exposed areas.