Draft
An allowance of taper on a pattern, or the parting of a joint; the object being to obtain a free separation of mould and pattern-surfaces which, if left straight, would ceate friction and cause damage to the mould. See TAPER.
Twelve hundred entries from the golden age of cast metal — how bells are founded, why brass is not bronze, what a cupola melts and a core withstands — by Simpson Bolland, the trade's great teacher.
An allowance of taper on a pattern, or the parting of a joint; the object being to obtain a free separation of mould and pattern-surfaces which, if left straight, would ceate friction and cause damage to the mould. See TAPER.