The new transmission belts "Nylmag" leather and nylon had expanded the range of production and began manufacturing the first rubber belt conveyors. In these years, Paolo registered the first patent for a steel conveyor belt where the supporting plates were connected with steel wire mesh and the first prototypes of a new steel belt conveyor, able to withstand high temperatures and to carry difficult materials were created and installed in mining and cement companies. Trials and tests were then performed in order to achieve the optimized design of this new conveyor concept, based on the highest operational dependability.