A deformable vacuum holder having a glass facing wall of flexible sheet material subject to local distortion for shaping heat-softened material, such as glass sheets, has a deformable sheet of insulator material attached mechanically to said glass facing wall for engaging the flexible glass facing sheet...http://www.google.es/patents/US4511386?utm_source=gb-gplus-sharePatente US4511386 - Deformable vacuum holder used to shape glass sheets
Deformable vacuum holder used to shape glass sheets
