The Lorain Creamery had its roots in a company called the Sumner Creamery Company. I couldn't find the company in the Lorain Public Library's oldest city directory (1905) but I did find it in the second-oldest directory (1912). The 1912 ad is shown above.
Sumner G. Crooks was listed as in charge of the company, which was located at 112 Seventh Street. By 1915, the company was listed as the Sumner Company and was located at 212 Seventh Street.
The Lorain Creamery wouldn't show up in the city directory until 1919, as "Successors to Sumner Company".
Next: Into the 1920s and 30s