Coin Production | U.S. Mint17 Feb 2017 ... Coin production. The Mint's coin production process has advanced greatly since 1792. The first Philadelphia Mint used harnessed horses to drive the crude machinery that produced our coinage. The manual process required heating metals in a blacksmith-like furnace, and flattening them into sheets by repeated trips through rollers. Coin shapes were then punched out of the metal sheets, and these were hand-fed into machines that stamped them with coin faces.