Liquid dye deposited on the pile of a carpet tile can be fixed by inserting an array of heated pins into the pile. The pins, mounted on a block, penetrate the tufts of the pile which have liquid dye thereon but do not penetrate the backing of the carpet tile. A heating element to raise the pins to the...http://www.google.fr/patents/US5116243?utm_source=gb-gplus-shareBrevet US5116243 - Carpet dye fixation method and apparatus
