A nappable, dimensionally stable fabric is produced on a three bar warp knitting machine by over feeding the yarns fed by the bottom bar to provide nappable loops, and by knitting the yarns fed by the top bar in a pattern providing nappable floats, longitudinal stability being provided by yarns knit...http://www.google.fr/patents/US4567075?utm_source=gb-gplus-shareBrevet US4567075 - Double faced knit fabric and method
