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 (1921)
Ritchey, James, Monroe, Walter W. (Walter William), b. 1869 · Chicago, American technical society · leaf 194
terbored for threeflat-head wooden screws, or, better yet, tapped for three flat-headstove bolts, which will be passed up through the plate stock. Coun-terbore holes in the stripping plate and cope plate, for the flangesof the-se flask pins, beuig veiy careful to center these holes accurately.… … Fig. 300. Jig for Locating Centers of Flask Pins on Machines pin jig shown in Fig. 300. This jig is made of flat steel stock, andthe holes are drilled with the same jig which is used for drillingthe holes in the flask, Fig. 301. Test the distance from the checkingline to the flask pins with…
Patternmaking
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