10.]
[Illustration: Fig. 11.]
The mold-carrying wheel is sustained by a horizontal slide, and as soon
as the matrix line is lowered to the casting position, a cam at the
rear pushes the slide and mold wheel forward until the front face of the
mold is closed tightly against the rear face of the matrix line, as
shown in Fig. 12.
[Illustration: Fig. 12.]
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.
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