Up: Glassmaking
How It Is Made
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being engraved very carefully in the walls of the mould. Machines are
now used for making bottles and lamp glasses partly by squeezing, partly
by blowing with compressed air. We may here mention a simple apparatus
for making glass stoppers with flat heads and tapering shanks, such as are
used for sauce bottles.
Fig. 59.--Glass Stopper Mould.
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A section of it is given in Fig. 59. The solid black
part C, the "bed," has a number of circular depressions
sunk in its upper face, immediately below an equal number of holes in the
"centre" B, and also two projecting pegs for maintaining
B in its correct position. When a "nest" of stoppers is
about to be pressed, the workman places B on C,
and lowers
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