the vertical sidesof the pattern are tapered, and it is sometimes spoken of as the taper. The amount of draft to be allowed is governed bythe case in hand, some patterns requiring more thanothers. The usual amount is 1-8 inch for 1 ft. inheight; this is generally enough for small and compara-tively… … Fig stated thus: Give the pattern as much draft up to 1-4 Inch per foot in height as will not Interfere with the design. Whatever amount is allowed should be added to thesize of the casting as given in the drawing. For smalland plain work one-sixteenth of an inch will be enough,but if the pattern…
Patternmaking
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