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U.S. Patent No. 10,966,879
June 3, 2021
By: Karen McIntyre
Editor
Takuya Inoue, Kanonji, Japan; Shunsuke Takino, Kanonji, Japan; and Hideaki Maki, Kanonji, Japan. Assigned to Unicharm Corporation, Ehime, Japan. Filed: 5/13/16 Issued: 4/6/21 A disposable diaper, comprising: a front waist region, a rear waist region and a crotch region located between the front and rear waist regions and includes a vertically elongated absorbent chassis extending toward the front and rear waist regions and centering on the crotch region, wherein the absorbent chassis includes an absorbent structure and a pair of side flaps extending outward in the lateral direction from both side edges of the absorbent structure, each of the side flaps is formed of layered sheet materials and includes a distal edge being spaced apart in the lateral direction from the side edge of the absorbent structure and extending in the vertical direction, a cuff branch line defined between the side edge of the absorbent structure and the respective distal edge so as to extend in the vertical direction, a leg-opening elasticized area extending between the cuff branch line and the distal edge and a leakage-barrier cuff branched from the cuff branch line and extending in a direction intersecting with the leg-opening elasticized area, the leg-opening elasticized area has a plurality of leg-elastic members extending in the vertical direction and at a predetermined interval in the lateral direction, the leakage-barrier cuff has a free edge parallelly-spaced in the lateral direction from the cuff branch line so as to extend in the vertical direction, a distance from the cuff branch line to the distal edge is larger than a distance from the cuff branch line to the free edge, the number of sheet material layers included in the leg-opening elasticized area is larger than the number of the sheet material layers included in the leakage-barrier cuff, and a single leg-elastic member, among the plurality of leg-elastic members, overlaps the cuff branch line in a thickness direction perpendicular to the lateral direction and the vertical direction.
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