Method of bending glass sheets in unison to complicated shapes

摘要

In shaping a pair of glass sheets simultaneously to a complicated shape including a longitudinal component of bend and a complicated transverse component of bend such as one that is S-shaped in elevation or other complicated shapes, the pair is sag bent in unison on an outline mold to sag bend the sheets to a shape approximating their longitudinal component of bend, then the pair of sag bent sheets is lifted on a solid mold having a complicated shape including said complicated transverse component of bend to impress said transverse component of bend (into engagement with an upper pressing mold of complementary curvature, if needed) and supported on said solid mold for the minimum time sufficient to develop said complicated shape. The pair of glass sheets bent to said complicated shape is returned as rapidly as possible to said outline mold and cooled at a controlled rate while supported on said outline mold to a temperature below the strain point to insure that the pair of glass sheets retain their complicated conformed shapes so that they can be laminated subsequently with minimum difficulty. The viewing area of the bent glass is engaged with a solid mold while at an elevated temperature at which the glass surface is likely to be marred for a minimum time needed to impart the transverse component of bend thereon.