| 摘要 |
The semi-cylindrical one-piece glass profiles, for support posts for electrical and telephone cables and the like, has a semi-cylindrical wall of at least 3 m length, a width of at least 0.1 m and a thickness of at least 5 mm, with edges at right angles to the wall. Also claimed is a mfg. process where the molten glass is shaped between two rotating profiled units. They form a glass strip with a lateral section where the centre is thinner than the edges with relatively strong zones between the centre of the strip and the edges. The strip is distorted into a concave profile between its edges with a depth, as a spout with a hollow increasing curvature as far as the edges next to the shaping units, according to the required shape of the semi-cylindrical glass profile. The profile are annealed and cut to length.
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