Society of Glass Technology · [Sheffield] · leaf 477
transversesection. The metalfrom which the sheetis drawn is containedin an extension, 1, ofthe tank which hasmovable roof sections,5, 6, suspended fromtrucks, 9, running onoverhead tracks, 10.The sections, 5,6, havedepending curtainblocks, 7,8, respective-ly, which reach almostto the surface of… … MACHINERY FOR THE WORKING OF GLASS. 47 atmosphere. Thus by adjusting the distance between the sections,5, 6, the temperature of the metal between the curtains, from whichthe sheet is drawn, can be controlled. A chilling-bar, 11, of refractory material and shaped as shown,extends across the tank…
Glass
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