Method and device for bending sheets

A furnace for bending panes, comprising:

• a pre-bending ring,
• a movable bending ring holder,
• a final bending ring,
• a preheating region for preheating at least one pane on the pre-bending ring on the movable bending ring holder,
• a pre-bending region with a vertically displaceable, bent suction device, comprising at least a counter framework with a bent contact surface as well as a cover surrounding the counter framework with an air baffle for a further bending of the pre-bent pane,
• a heating region for a final bending of an edge of the at least one pane on the final bending ring on the movable bending ring holder and for a surface pre-bending of the at least one pane by thermal irradiation,
• a second bending region with a second vertically displaceable suction device and a horizontally displaceable, bent counter mold configured for a further surface bending of the at least one pane, and
• a cooling region.