Society of Glass Technology · [Sheffield] · leaf 535
1917, No. 191230, andOctober 6th, 1917, No. 195039).—Relates to a process of forminglens blanks which consists in heating glass stock to a plastic con-dition, puddling the stock while heating to eliminate bubbles andstrise, pressing the stock into form after puddling and while plastic,and annealing… … Fig. 96. placed in a heating chamber, 2, on a rotating table, 12, whichcarries the glass beneath a number of gas burners, 36. The glassis thus gradually heated and when plastic is squeezed into the de-sired form by puddling-slides, 27. The puddled glass is thencarried by the table to rotating…
Glass
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