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    Patents

    Disposable Pull-On Diaper:

    U.S. Patent No. 9,592,163

    05.04.17
    Koichi Morimoto, Beijing, Japan; Takashi Umeo, Nishinomiya, Japan; Hiroyuki Ueno, Kobe, Japan; and Katsuhiro Yonemura, Kobe, Japan.
    Assigned to The Procter & Gamble Company, Cincinnati, OH.

    Filed: 1/27/16
    Issued: 3/14/17

    A disposable pull-on diaper comprising: an absorbent main body comprising a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent core disposed therebetween, wherein the absorbent main body has left and right longitudinally extending side edges, front and back transversely extending end edges, longitudinally opposing front and back waist panels, and a crotch panel between the waist panels, at least one leg elastic material disposed in proximity to each of said side edges and extending generally longitudinally along said side edges; an elastic belt comprising a front belt portion and a back belt portion joined to each other at side seams, each of said front belt portion and back belt portion has transversely extending proximal and distal edges, the distal edge of the elastic belt defines a waist opening, the proximal edge being located closer than the distal edge relative to the crotch panel of the absorbent main body, each of said front belt portion and back belt portion has a central panel; wherein the elastic belt comprises a belt substrate layer and a plurality of waist elastic strands and a plurality of side panel elastic strands each extending in the transverse direction and attached to the belt substrate layer; wherein said waist elastic strands are disposed in proximity to the distal edge and said side panel elastic strands are disposed at least in the left and right side panels, and wherein the elastic belt has a stretched waist circumferential length and a free-state waist circumferential length; wherein, the central panel of the front belt portion is joined to the front waist panel of the absorbent main body, the central panel of the back belt portion is joined to the back waist panel of the absorbent main body, and the proximal edge of the respective left and right side panels of the front belt portion and the back belt portion together with the left and right side edges of the crotch panel of the absorbent main body defines two leg openings, each of the leg opening has a leg opening length which can be calculated according to the following formula: leg opening length=Le+Sf+√{square root over (Sb2+La2)} wherein Le indicates leg elastic length, Sf indicates front side panel elastic length, Sb indicates back side panel elastic length and La indicates the difference in the longitudinal length of the front belt portion and back belt portion; wherein the stretched waist circumferential length is no greater than about 700 mm; and wherein the leg opening length is no greater than about 300 mm; and wherein a longitudinal length of the front belt (LF) is less than a longitudinal length of the back belt (LB).
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