US 12,485,046 B2
Tape-type disposable diaper
Kohei Aochi, Tochigi (JP)
Assigned to Daio Paper Corporation, Ehime (JP)
Appl. No. 18/265,140
Filed by DAIO PAPER CORPORATION, Ehime (JP)
PCT Filed Jan. 26, 2022, PCT No. PCT/JP2022/002763
§ 371(c)(1), (2) Date Jun. 2, 2023,
PCT Pub. No. WO2022/185790, PCT Pub. Date Sep. 9, 2022.
Claims priority of application No. 2021-033331 (JP), filed on Mar. 3, 2021.
Prior Publication US 2024/0108518 A1, Apr. 4, 2024
Int. Cl. A61F 13/56 (2006.01); A61F 13/49 (2006.01)
CPC A61F 13/5644 (2013.01) [A61F 13/49012 (2013.01); A61F 13/49017 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A tape-type disposable diaper comprising:
a crotch section containing a middle of a front-back direction of the diaper;
ventral and dorsal regions extending forward and backward, respectively, of the middle of the front-back direction; and
a fastening tape extending in a width direction of the diaper from each of opposed lateral portions of the dorsal region,
wherein each fastening tape has a waist-side flap and a round-leg-side flap,
wherein the waist-side flap and the round-leg-side flap have a proximal portion integrated via a perforated line extending in the width direction and passing a center of a dimension in the front-back direction of the fastening tape, and distal portions spaced from each other in the front-back direction,
wherein the distal portion of the waist-side flap and the distal portion of the round-leg-side flap each have a fastening part provided with a hook member or an adhesive layer detachably fastenable to the ventral region,
wherein a shape of each fastening tape is symmetrical with respect to the perforated line,
wherein a shape of the waist-side flap and a shape of the round-leg-side flap are each symmetrical with respect to a virtual line extending in the width direction passing a center of a dimension in the front-back direction,
wherein each fastening part extends continuously in the front-back direction in a predetermined width along a predetermined position in a middle of the width direction of the distal portion,
wherein each distal portion has a tab part located distally from and exclusive of the fastening part,
wherein a contour of a part of a side edge of the fastening tape located between the fastening part of the waist-side flap and the fastening part of the round-leg-side flap is a contour of an edge of the tab part,
wherein, a part of a side edge of each fastening tape located between the fastening part of the waist-side flap and the fastening part of the round-leg-side flap is equally divided among three in the front-back direction,
wherein the three are defined as a first edge located closer to a waist, a second edge located closer to a round-leg area, and a third edge located between the first edge and the second edge, at least part of the third edge being provided with a notch dented proximally from the first and second edges,
wherein an initial point of the perforated line is positioned on a proximal-most side of the notch,
wherein an edge of a part located between the fastening part of the waist-side flap and the fastening part of the round-leg-side flap has a first straight line part extending linearly from a base point of a back side of the notch toward the back side and a second straight line part extending linearly from a base point of a front side of the notch toward the front side, and
wherein an entire edge of the notch has a curved contour without any inflection points.