The Screen Machine Screen Machine Industries, Inc is one of the largest manufacturers of portable tracked and wheeled crushing and screening plants in North America and a global leader in machinery design and innovation. A complete line of mobile impact and jaw crushers, portable screening plants, trommel screens and radial stacking conveyors are designed and manufactured for the aggregate, construction, recycling, topsoil, landscaping and mining industries. Crushing Screening Trommels Conveyors