Society of Glass Technology · [Sheffield] · leaf 537
Fig. 33. fluid, such as water, air, or steam. U.S.A. Pat. No. 1187025 isreferred to in the specification. G. D. 64. Drawing Glass Cylinders. William E. Standley (U.S.A.Pat., June 24th, 1919, No. 1307381. Filed November 17th,1915, No. 61974).—A blowhead used in drawing cylinders is pro-vided with… … Fio. 34. The blowhead consists of a bait, 2 (Fig. 34), a pipe, 1, throughwhich air is supplied to the bait, and air ports, 8, in the bait,adjacent to the lower end of the pipe, 1, through which the excessair is allowed to escape. In order to regulate this escape of air,the ports, 8, instead of…
Glass
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