A method and apparatus for treatment of relatively moving substrate materials by preheating the substrate before precise selective application of discrete, high temperature pressurized streams of fluid against the surface of the materials to impart a visual and tactile change thereto. The apparatus includes...http://www.google.co.uk/patents/US5035031?utm_source=gb-gplus-sharePatent US5035031 - Method and apparatus for heated pressurized fluid stream treatment of substrate material
