US Patent No.: 8,663,187 B2
Inventor(s): Satoru Sakaguchi, Kagawa, Japan.
Company: Uni-Charm Corporation, Ehime-Ken, Japan.
Filed: 3/5/09
Issued: 3/4/14

A female member of a hook-and-loop fastener formed of a fibrous material, the female member engageable with a mating male member, the female member comprising: a plurality of lines of dense fiber portions in which the fibrous material has a high basis weight; and a plurality of lines of sparse fiber portions provided between the dense fiber portions, the fibrous material in the sparse fiber portions having a basis weight lower than in the dense fiber portions, and wherein the dense fiber portions are continuous convex ribs which are formed on the fibrous material being piled up, and the sparse fiber portions are continuous concave grooves provided between the ribs.