Bolingbrook, IL, In response to continued demand for IST Metz ultraviolet equipment among printers and converters, IST America"the North American subsidiary of IST Metz"has expanded its service staff. Hartmut Volberg will service IST equipment customers in the eastern United States and Canada. Volberg, a master electrician trained in Germany, has nearly 20 years experience servicing complex electronic and electromechanical equipment. Robert J. Rowley has joined IST America with more than 25 years experience in the service and manufacture of ultraviolet curing equipment. He will assist IST customers in the central United States and Canada, based at the IST America headquarters near Chicago.