in case you were wondering:
American Cheese is a processed cheese made of Cheddar, Colby, or similar, combined with Sodium citrate. The Sodium citrate keeps the cheese fats from separating during the pasteurization process.
The patent for processing American Cheese was granted in 1916 to James L. Kraft, a Canadian of German descent who had immigrated to the US in 1904. Pasteurizing the cheese prevents it from spoiling, allowing it to be shipped farther and stored longer. It was actually WW1 that gave Kraft (and his company) their big break, as the US government provided cheese (in tins) to the armed forces abroad.
So no, Project Paperclip here, although the US Armed Forces and Germans were involved. His ancestors left Germany for Mennonite reasons, not because they were Nazis.
Fun fact: His parents spelled their last name "Krafft". He dropped one of the Fs when he started J.L. Kraft & Bros. Company, which later became Kraft Foods.