Most of SIG's earlier packaging equipment efforts were focused on small dry food items such as chocolates and candy. Following the 1982 FDA approval of hydrogen peroxide sterilization; on June 28, 1983, SIG acquired Doboy Packaging Machinery, Inc. of Wisconsin. SIG COMBIBLOC INC. was then incorporated on September 1, 1983, in Columbus, Ohio, where production commenced in 1984. In 1989, through the acquisition of PKL in Linnich, Germany, SIG entered the field of aseptic carton liquid packaging, later known as SIG Combibloc.Shurtleff, W., et al History of Soybeans and Soyfoods in Austria and Switzerland (1781-2015), by William Shurtleff and Akiko Aoyagi, Soyinfo Center, 2015, page 564. Retrieved August 22, 2018.Ohio-Register "SIG COMBIBLOC INC.", ohio-register.com. Retrieved August 22, 2018.
