| 摘要 |
<PICT:1077329/C1/1> In a method for the production of flat glass by the "float" technique, the formed glass ribbon 21 is lifted away from the molten metal bath 8 and is passed over and supported by a fluid cushion 30, before passing into an annealing lehr 22 through which it is conveyed in a conventional manner. The air cushion is maintained in a separate zone 27 and is formed by controllably passing air under pressure, and at a temperature below that of the glass ribbon, into a box 28 having an arcuate and perforated top 30. Flexible sealing strips 35 and exhaust passages 36, 37 prevent any gases infiltrating into the zone 27 from the forming or annealing zones. The fluid may be air, a non-oxidizing gas, or a gas which will react chemically with any metal residue remaining on the glass ribbon surface. To reduce the weight of ribbon 21 on the first conveyer roll 23 in the lehr an additional air support cushion, supplied from a box 40, is interposed between the first two rolls. |
