Society of Glass Technology · [Sheffield] · leaf 570
rom the roof of thefurnace prevent too rapid descentof the raw material, and an inspec-tion opening, 12, is provided on thefurnace wall opposite the lip, 6.The cutter blades, 17, 18, are carriedby concentric shafts, 15, 16, and areoperated at regular intervals from arotating shaft, 28, of the… … Fig. 108. 192 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY,
Glass
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