English prose literature; Exposition (Rhetoric); Readers -- Science
While this is taking place, the pot, having its supporting legs mounted
on a horizontal shaft, swings forward until its mouth is closed tightly
against the back of the mold, as shown in Fig. 12. While the parts are
in this position, the justifying bar _Q_ is driven up and pushes the
spaces or justifiers upward through the line of matrices until the line
is expanded or elongated to fill completely the gap between jaws _P_,
_P_.
In order to secure exact alignment of the matrices vertically and
horizontally, the bar _Q_ acts repeatedly on the spaces, and the line
is slightly unlocked endwise and relocked. This is done that the
matrices may be temporarily released to facilitate the accurate
adjustment demanded. While the justified line is locked fast between the
jaws, the elevator, and the mold, the plunger _m2_ in the pot
descends and drives the molten metal before it through the spout or
mouth of the pot into the mold, which is filled under pressure, so that
a solid slug is produced against the matrices. The pot then retreats,
and its mouth breaks away from the back of the slug in the mold, while,
at the same time, the mold retreats to draw the type-characters on the
contained slug out of the matrices. The mold wheel now revolves,
carrying the rear edge of the slug past a stationary trimming-knife, not
shown, and around to the position in front of the ejector, as previously
described and shown in Fig. 4, whereupon the ejector advances and drives
the slug between two side trimming-knives into the galley at the front.
DISTRIBUTION
After the casting action the first elevator _O_ rises and carries the
matrix line above the original or composing level, as shown in Fig. 13.
The line is then drawn horizontally to the right until the teeth of the
matrices engage the toothed elevator bar _R_, which swings upward with
the matrices, thus separating the matrices from the spaces or justifiers
_I_, which remain suspended in the frame, so that they may be pushed to
the right, as indicated by the arrow, into their magazine.
[Illustration: Fig. 13.]
[Illustration: Fig. 14.]
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