Bent glass sheet held during the cooling thereof

A method for preparing a bent glass sheet, comprising thermal bending of a glass sheet to form the bent glass sheet and then cooling the bent glass sheet by air blowing, wherein the cooling is carried out by a cooling device comprising a cooling frame and air-blowing boxes configured to blow air onto two main faces of the bent glass sheet, wherein the cooling frame comprises a support track for the bent glass sheet and a removable bearing piece that, in a bearing position and during cooling of said bent glass sheet by air blowing with said air-blowing boxes, bears on a top face of the bent glass sheet and at a periphery thereof, said air-blowing boxes being adapted to supply air flow onto the two main faces of the bent glass sheet when the removable bearing piece is in the bearing position to impart rapid cooling of a skin of the bent glass sheet forming said two main faces at a rate of cooling of at least 15° C./seconds,

• wherein the removable bearing piece is movable between the bearing position and a separated position in which the removable bearing piece is out of contact with said top face, and wherein the device is adapted to move the removable bearing piece from the separated position to the bearing position after the bent glass sheet rests on the cooling frame and prior to cooling the bent glass sheet.