Pattern making; a practical treatise for the pattern maker on wood-working and wood turning, tools and equipment, construction of simple and complicated patterns, modern molding machines and molding practice (1916)
Ritchey, James, Monroe, Walter W. (Walter William), b. 1869 · Chicago, American technical society · leaf 181
Fig. 282. … WoodScrews Fig. 28JL_Core Box for Bottom Core strike, it is possible to ram thesand firmly under each drawpiece, where it would be ratherdifficult to ram in any otherway. Sand is now cut out atthe top nearly to the shape ofthe. top crown, and the top ofthe core box pressed into place.This top may…
Patternmaking
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