A spiral seam construction for lower caliper, multi-layer papermaking fabrics. The spiral seam members have a plurality of headcurves which are interconnected by a plurality of winding legs. Each of the winding legs has a cross-section in which the vertical dimension is less than the horizontal dimension,...http://www.google.es/patents/US4862926?utm_source=gb-gplus-sharePatente US4862926 - Shaped monofilament coil seam and fabrics
