Luebben Hay Baler - Historic Landmark of Agricultural Engineering. In 1892, Hugh Luebben from Sutton, Nebraska, with sons Melchior and Ummo built a mobile machine to produce round hay bales between two sets of rotating flat belts. They began manufacturing the baler in 1909 in Beatrice and later moved to Omaha, Nebraska. Allis-Chalmers purchased the patent in 1939 and eventually sold 77,200 "Roto-Balers." The Luebben baler made handling easier, improved hay quality, and reduced costs. The same basic design is used on modern large round balers. Dedicated by the American Society of Agricultural Engineers 1993