Rock Products

MAR 2013

Rock Products is the aggregates industry's leading source for market analysis and technology solutions, delivering critical content focusing on aggregates-processing equipment; operational efficiencies; management best practices; comprehensive market

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SCREENING SIZING Deister Machine Co.: More Than a Century of Screening Solutions By Carol Wasson Deister Machine Co. Inc. recently cele��� brated its 100th anniversary as a leading manufacturer of high���quality feeding, scalping and screening equipment. As a family���owned business with a history of in��� novation that began prior to World War I, Deister says that ���it continues to build upon its century of service via solid engi��� neering and customized screening solu��� tions that allow today���s aggregate producers to efficiently meet the most stringent specifications.��� Irwin F. Deister Jr., chairman, and E. Mark Deister, president, represent the family���s third generation at the company���s helm. Their coveted tradition of quality and cus��� tomer satisfaction began with their grand��� father, Emil Deister, the company���s founder. Company founder Emil Deister established Deister Machine Co., Inc. in 1912. Founder Emil Deister and his employees outside the Deister plant in 1912. Born in Germany in 1872, Emil Deister mi��� grated to the United States with his par��� ents as a youth. He grew up in Woodburn, Ind., and took his first job as a lathe opera��� tor at the Bass Foundry and Machine Co. in Fort Wayne in 1893. As of 1905, he had risen to the position of draftsman and erecting engineer. Throughout his career with Bass, Emil Deister took up the study of ore separation. Eventually, Emil Deister would patent his own equipment, starting with a centrifugal separator that extracted gold from mer��� cury amalgam, and continuing on to de��� velop ore separating tables. His differential���motion ore separating table had riffles attached to its surface. These riffles collected the heavier ore particles and conveyed them in one direction to��� ward a collector, while water washing across them carried the lighter impurities away. The table is praised in Taggert���s Handbook of Ore Dressing, the official text��� book at many mining schools, as the first serious competition to the only other kind of ore separating table available at the time. Emil Deister built his first ore���separating table in his basement and took his invention to Arizona, where he begged space from mill owners for its demonstration. Success��� ful and armed with orders for the new equipment, Emil returned to Fort Wayne to set up business in 1906, as the Deister Con��� centrator Co. In 1912, Emil sold his inter��� ests in Deister Concentrator Co. and established Deister Machine Co. Inc. Deister Machine Co. began manufacturing operations at 1933 East Wayne Street in Fort Wayne, Ind., its current location. The original building, a 5,500 sq.���ft. plant, is still in active use amidst a total operation Circa 1915. Ninety-six Deister ore concentrating tables are readied for shipment to Ticonderoga, N.Y. 50 ROCKproducts ��� MARCH 2013

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