Society of Glass Technology · [Sheffield] · leaf 641
rily the flow of glassthrough the outlet port. Thispush-back mechanism is arrangedto enter the outer end of the dis-charge port, thus forcing a chilledneck of glass inwardly towardsthe zone of very hot glass, the impinging of the push-backagainst the glass chilling the surface, thereby forming a… … i 4*^ w-ra1- Fig. 157. MACHINERY FOR THE WORKING OF GLASS. 241 down and the hot glass to flow through in a stream to form thenext gathering. The contact end of the push-back is rounded ortapered so as to impart an arched formation to the wall of chilledglass, and during the time it is in contact…
Glass
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