as toenable him to make patterns so that they can bepulled without injury to the mold. This should bethe first consideration of the pattern-maker, as on itdepends in la large degree the accuracy of the casting.If the mold is injured in any way by the pulling of thepattern, so that the molder has to… … o a to O CHAPTER VIII. CONSTRUCTIONAL JOINTS In a consideration of this part of the general subjectof pattern-making, two things must be given prominence,viz.: the strength and durability of the pattern, and itspermanence of form. This latter is very likely to beinterfered with by the absorption of…
Patternmaking
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