Society of Glass Technology · [Sheffield] · leaf 644
Fig. 174. 368. An Improved Glass-drawing Ring. J. Durieux,New Eagle, Pa. (U.S.A. Pat.,No. 1367027, February 1st, 1921.Filed July 15th, 1919, No. 310961).—In order to exclude stones andother foreign substances from thearea of metal from which drawingtakes place, a floating ring is madewith inner and… … Fig. 175. G. D. 214 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY. 369. Rolling Plate Glass. H. A. Reynolds, Ford City, Pa.,Assignor to The Pittsburgh Plate Glass Co. (U.S.A. Pat., No. 1375014, April 29th, 1921. FiledMay 26th, 1920, No. 384461).—Theobject.of the invention is to preventor minimise…
Glass
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