Edwin I. Groff patented the first commercially successful automatic pretzel twisting machine and founded Reading Pretzel Machinery, the forerunner of Reading Baking Systems, in 1947.
His machine was designed to manufacture spiral pretzels very uniform and quickly, which results in rapid overall production.
He is the son of Edwin C. Groff and Alberta Haas.
He married Kathryn S. Trostle
who died in March 1997, and is survived by a son, E. Terry.
"Pennsylvania, County Marriages, 1885-1950," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VFWQ-JFG : 23 September 2017), Edwin I. Groff and Kathryn S. Trostle, 12 May 1944; citing Marriage, West Reading, Berks, Pennsylvania, United States, various county courts and registers, Pennslyvannia; FHL microfilm 2,080,488.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MGW7-F8C : accessed 18 July 2020), Edwin I Groff in household of Edwin C Groff, Penn, Berks, Pennsylvania, United States; citing enumeration district (ED) ED 44, sheet 1B, family 13, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1313; FHL microfilm 1,375,326.
"Pennsylvania Obituaries, 1977-2010," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVF1-PWH5 : 17 March 2018), Edwin I Groff in entry for Kathryn S Groff, 1997; citing Pennsylvania, United States, Old Buncombe County Genealogical Society, Asheville.