About Vorti-Siv / MM Industries, Inc.
MM Industries, Inc. was founded in 1968 by Mr. Rudolf Maroscher, P.E. who was then heading the electrical engineering department at the nearby Kent State - Salem Technical Branch. The company was built in a truly unique location near Mr. Maroscher's 400 acre apple, tennis and cattle farm, which is approximately two miles south of Salem, Ohio.
A year later, the company began manufacturing several models of the early VORTI-SIV gyratory sieves for the Lehmann Division of Mulling Manufacturing also in Salem. In 1973, MM Industries purchased all rights tooling and expenses to the then 25 year old VORTI-SIV product range. All manufacturing was immediately moved to the company's Salem Grange Road facility.