Bending of sheets of glass running on a bed of rolls

A device for bending sheets of glass running between a bed of upper rolls and a bed of lower rolls forming a shaping bed that pinches the sheets of glass as the sheets of glass run, said device comprising said shaping bed that is disposed in a path having a curved profile in a running direction of the sheets of glass, a rotating assembly and a clamp,

• wherein said shaping bed comprises at least one roll, said roll comprising a metal rod preformed in a curved profile lengthwise and a flexible sheath that is able to rotate about the rod, said sheath comprising a first envelope made of a polymer material and a second envelope made of a flexible metal material disposed around the first envelope so that the sheath is sufficiently deformable to follow the curved profile of the preformed metal rod, the first and the second envelope arranged to rotate together as one,
• wherein said clamp is arranged to clamp the flexible sheath to the rotating assembly only by way of the second envelope so that rotation of the flexible sheath by the rotation assembly is carried out only by way of the second envelope and rotation of the second envelope by the rotating assembly rotates the first envelope.