Society of Glass Technology · [Sheffield] · leaf 723
F». 214. 322 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY, 417. Automatic Test-tube Making Machine. P. Born-kessel, Berlin (Brit. Pat., No. 177884, January 7th, 1921).—Relates to automatic apparatus for making two glass tubes, withone end closed, such as test-tubes, from a single open-ended… … Fig. 215. They are lifted by an oscillating cam-operated conveyor, 7, fromthe position, /, on to supporting rollers, g, where they are heatedcentrally by a burner, h. They are removed to an intermediaterest, i, and from thence to a device, B, of known kind, whichdivides the blank centrally into two…
Glass
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
