A dye printing system for multi-color patterning or pile face sheet materials, such as tufted carpet, includes a stencil, in which the pattern elements are formed by divider walls extending perpendicularly to the plane of the sheet material. The stencil is lowered into contact with the pile face of the...http://www.google.fr/patents/US4336753?utm_source=gb-gplus-shareBrevet US4336753 - Rug printing system
