| 摘要 |
<p>"Method of and apparatus for toughening or prestressing at least one of the simultaneously bent sheets of a sandwich type safety glass" In a method of prestressing at least one of the individual glass sheets making up a sandwich safety pane, after the superimposed individual sheets have been bent in a bending zone of a bending furnace on a bending die conveyed through the furnace, the sheets are taken past a blow system, disposed in a zone of the furnace where the general temperature is above the transformation point of glass but below its deformation point, at least one of the individual sheets being subjected, by said blow system, to the action of cooling air over the entire surface of the sheet, at least on one side thereof. In one embodiment, the top sheet of the superimposed bent sheets on the die is lifted from the die in the last-mentioned zone and is conveyed along an elevated path whilst the die proceeds below, the lifted sheet passing between upper and lower curved blow pipes supplying the cooling air to the upper and lower surfaces of the lifted sheet, which is thereafter placed in position again on the sheet or sheets remaining on the die, the latter then proceeding out of the furnace.</p> |
