When PPI Graphics opened its doors for business in 1932, Canton had already evolved into an economic powerhouse. It was home to dairies supplying most of northeast Ohio, Hoover Vacuum Company, today’s Diebold Nixdorf and Timken Company, and many other vital providers to a growing America. Most well-known about Canton is that the NFL was formed here in 1920 as the American Professional Football Association. Canton is the proud home of The Pro Football Hall of Fame.