It quickly became apparent that not only the outer surface of the roller but also the inner layer showed unique features. One step led to another, and in 1957 the first centrifugally cast pipe made of glass-fibre reinforced plastic was produced. In the same year, the Swiss firm patented the production process and started to manufacture “rollers” for their own use in the dyeing mill. The first external application in the form of pipes and pipe couplings took place a little later and the products installed at the time are still in use without any problems.
