ally opposite one; so shown in Fig. 71, the taper pins being fast to the cope lugs that, after the mold is made, it can be detached from the per- shown on the sides, fitting into holes provided in the nowel fected mold and can be used to make another. Forthe de- lugs, similarly shown, serving to… … has been no opportunity to loosen the pattern in the mold. sand, lightly rammed, the taper pin, R, Fig. 68, being insert- It is true that, in some cases, a bar is passed through the ed to leave in the mold the hole, R, Fig. 71, through which cope and driven into the pattern, and by rapping it the…
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