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 210
rn are attached to the plate with flat-head machine screws. Alignment. Of course the alignment of the patterns on thecope and drag machinesmust be very exact toproduce perfect castings,but this is the work ofthe metal-pattern maker.To avoid errors, thereshould always be atrial casting made… … Fig. 328. Master Pattern for Gate 192 PATTERN MAKING feature of the pattern for the cover is the roll-back method of drawingthe pattern on the cope machine, which is illustrated in section
Patternmaking
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