A high speed fabric napping apparatus is provided in which the fabric is fed in a straight line overpairs of worker rolls, one of each pair rotating in the direction of the pile of the fabric and the other rotating counter to the pile direction. The speed of each of the worker rolls is individually adjustable...http://www.google.fr/patents/US4463483?utm_source=gb-gplus-shareBrevet US4463483 - Fabric napping apparatus
