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 122
cylindricaldry-sand cores, whether the cores are made in wood or in metal coreboxes or with the core machine. The value of the fixed taper and length to the cope core printis most apparent. This form can then be made at one end of thecore box, and the machine-made cores can be ground to a… … flight Draft Fig. 184 Proportions of Standard Core Print fit the print mold. It will -also save the pattern maker the expenseof turning a pair of prints every time their use is required. A patternshop, having a dozen pattern makers employed, will get a dozendifferent forms to the cylindrical core…
Patternmaking
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