| 摘要 |
There is traversed over the outer surface of the windscreen (P), beginning at the bottom on one side, a head (T) fitted with one or more rotating brushes (42) of felt or other material, while a solution in liquid phase with cerium oxide or other material suitable for fine lapping and polishing of optical glasses is fed to the portion of windscreen on which the brushes are working. At the end of each traverse, the head with the brushes is raised by a precise amount, so as essentially to scan the entire surface of the windscreen. A small gutter (1) is fixed to the perimeter of the windscreen, except along its upper edge, to collect the polishing solution and return it via a lower pipe (2) to the tank (57) from which it was taken. At the end of the process the outer surface of the windscreen is washed down with a jet of water that carries away any residues of said lapping and polishing solution. <IMAGE> |
