Herb Lotman, chairman of the board of Philadelphia-based Penn Emblem Co. (asi/77120), died this spring from complications of heart failure. He was 80.

Lotman was most well-known as the founder of Keystone Foods, which developed the mass-production system for making McDonald’s frozen hamburgers. Over four decades, Lotman built Keystone into a massive operation that generated annual sales of $5 billion. A noted philanthropist, Lotman co-founded the McDonald’s LPGA Championship, which has raised nearly $50 million for Ronald McDonald charities since its inception. Lotman was also an active board member of the Children’s Cancer Research Foundation and the Philadelphia College of Osteopathic Medicine.

Lotman is survived by his wife, Karen, children Shelly and Jeff, several grandchildren and a sister.