Herb Lotman, a food industry entrepreneur who founded Keystone Foods and developed a mass-production system for making McDonald's frozen hamburgers, has died. He was 80.
Lotman died Thursday at a suburban Philadelphia hospital from complications of heart failure, his family announced.
The Philadelphia native began his career in the food industry with his family's wholesale beef business.
Keystone Foods developed the first total distribution concept for McDonald's in the late-1960s with the use of cryogenics and helped conceive the Chicken McNugget in the 1980s. Over a 40-year period, Lotman turned Keystone into a multinational operation with $5 billion in sales,...