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 217
Fig. 342. Drag and Cope Machines in Position for Melding … Fig. 343. Pattern Expanded Ready to Be Drawn through the Stripping Plate Brag Mold. Fig. 342 illustrates the cope and drag machine,with the patterns in position for molding. As the sand is rammedto cover the pattern c, the operator pinches the facing sand into I PATTERN MAKING 199 the hole d with…
Patternmaking
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