A versatile carpet dyeing applicator capable of producing novel and visually pleasing multicolor pattern effects ranging from apparently completely random to fairly well-defined. An inclined distributing plate such as a conventional doctor blade extends across the width of the carpet web, transverse...http://www.google.com.au/patents/US4547921?utm_source=gb-gplus-sharePatent US4547921 - Pattern dyeing of textile materials such as carpet
