A chemical, such as a dye, is applied to a textile substrate, such as carpet, by continuously moving the substrate past an application position. At the application position a liquid formulation containing the chemical, heated to a temperature below the boiling point thereof, is sprayed toward the substrate,...http://www.google.ca/patents/US4790043?utm_source=gb-gplus-sharePatent US4790043 - Process and apparatus for applying a chemical to a textile substrate
