ATF (American Type Founders Company) was a business trust created in 1892 by the merger of 23 type foundries, representing about 85% of all type manufactured in the United States. ATF was the dominant American manufacturer of metal type from its creation in 1892 until at least the 1940s; it continued to be influential into the 1960s.
Kingsley, a manufacturer of imprinting and marking equipment, acquired ATF in 1986, and the type division became Kingsley/ATF Type Corporation. [MyFonts]
In the 2010s, Mark van Bronkhorst claimed the ATF trademark and established a new label for digitizations: ATF Collection.