"The boiler horsepower needed to operate a 6–8 roll Super-Sylon or Hypro at a constant 330° F and 120–125 psi is prohibitive. The heat energy cost can be double that of a modern self-contained thermal fluid ironer and 1.5 times the heat energy needed to operate a modern 2–3 roll steam ironer. The maintenance costs, in spare parts and technical expertise, is very high, compared to the newer machines. I can get into the intricacies of the interlinking chain drives, from roll to roll, dog bones and lubricating jets, but that would take a very long time. Nevertheless, an even ...