Patent ID: 7449016

Claim:
A disposable wearing article having a back-and-forth direction and a transverse direction orthogonal to said back-and-forth direction, said disposable wearing article comprising: as viewed in said back-and-forth direction, a crotch region, a front waist region lying in front of said crotch region and a rear waist region lying behind said crotch region, wherein each of said regions has a pair of side edges opposed to each other in said transverse direction and extending in said back-and-forth direction, said front and rear waist regions further having front and rear ends, respectively, opposed to each other in said back-and-forth direction and extending in said transverse direction, and one of said front and rear waist regions being provided on lateral margins extending along said side edges with connector sheet strips adapted to be detachably secured to the other waist region; and each of said connector sheet strips comprising (i) a proximal end overlapped and bonded together with one of said lateral margins on an inner surface of said wearing article adapted to face a wearer's body in use, and (ii) a deformable flap portion extending inward in said transverse direction from said proximal end and provided on a side facing the inner surface of said wearing article with a fastening element detachably engageable with an outer surface of said wearing article in the other waist region, said outer surface being adapted to face away from the wearer's body in use; wherein the proximal end of each of said connector sheet strips and the corresponding lateral margin contain a thermoplastic polymer and are bonded together at welding spots which comprise said thermoplastic polymer in a molten and then solidified state, the thermoplastic polymer in the molten and then solidified state defining a curved structure which has opposite exposed surfaces, wherein one of said exposed surfaces is concave and the other is convex, and wherein said proximal end lies on the side of the convex, exposed surface and the corresponding lateral margin lies on the side of the concave, exposed surface.