Society of Glass Technology · [Sheffield] · leaf 658
Fig. 129. Fig. 130. March 12th, 1918, No. 1259281. Filed July 3rd, 1915, No. 176 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY. 37847).-—In order to avoid the use of a two-part ring mould, par-ticularly with automatic or semi-automatic machines, the pressplunger, Fig. 129, which forms the parison, has…
Glass
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