Pull-on disposable diaper

• US 7,329,244 B2
• Filed: 02/14/2005
• Issued: 02/12/2008
• Est. Priority Date: 08/31/2002
• Status: Expired due to Fees

• Current Assignee: Unicharm Corporation
• Original Assignee: Unicharm Corporation
• Inventors: Otsubo, Toshifumi, Shimoe, Nariaki
• Primary Examiner(s): Stephens; Jacqueline F.
• Application Number:
  US11/056,277
• Publication Number:
  US 20050143711A1
• Time in Patent Office: 1,093 Days
• Field of Search: 604/385.201, 604/385.01, 604/385.21, 604/385.24, 604/385.25, 604/385.26
• US Class Current: 604/385.201
• CPC Class Codes: A61F 13/496 in the form of pants or briefs

Abstract

A pull-on disposable diaper has a body fluid absorbing component folded inward in a transverse direction of the diaper so that a width of the body fluid absorbing component may be reduced in a crotch covering region. In vicinities of leg-holes, elastic members intersect transversely opposite side edges of the body fluid absorbing component above points X, Y at which the side edges of the body fluid absorbing component intersect folding guides.

Claims

1. A pull-on disposable diaper having a height direction, a transverse direction being orthogonal to said height direction and a back-and-forth direction, said diaper being substantially symmetric about a longitudinal center line extending in said height direction and bisecting a dimension of said diaper in said transverse direction, said diaper having an inner surface facing a wearer'"'"'s body, an outer surface facing wearer'"'"'s clothes, said diaper being composed of a front waist covering region destined to cover a wearer'"'"'s front waist region, a rear waist covering region destined to cover a wearer'"'"'s rear waist region and a crotch covering region destined to cover a wearer'"'"'s crotch region so as to define a pants-like configuration having a waist-hole and a pair of leg-holes, and provided on said inner surface with a body fluid absorbing component extending over said crotch covering region and further extending into said front and rear waist covering regions, said pull-on disposable diaper further comprising:

said body fluid absorbing component comprising a liquid-absorbent core and a liquid-pervious cover sheet at least partially covering said core, having an inner surface facing said wearer'"'"'s body, an outer surface facing away from said wearer'"'"'s body and transversely opposite side edges extending parallel to each other beyond said crotch covering region into said front and rear waist covering regions and connecting said inner and outer surfaces to each other, said body fluid absorbing component being formed in said crotch covering region with a first folding guide extending from a transversely middle point between transversely opposite side edges to respective said side edges in said front waist covering region so as to describe a substantially V-shape, a second folding guide extending from a transversely middle point between transversely opposite side edges to respective said side edges to respective said side edges in said rear waist covering region so as to describe a substantially V-shape and a third folding guide extending in said transverse direction between said first and second folding guides, and said absorbing component being folded at least transversely opposite side edges on both sides of said longitudinal center line along said third folding guide so that said outer surfaces thereof face to each other and along said first and second folding guides so that said inner surfaces thereof face to each other; and

elastic members provided in one of said front waist covering region, said rear waist covering region and said crotch covering region so as to intersect said side edges in vicinities of said leg-holes, one of said elastic members provided in said front waist covering region intersecting said side edges above first crossing points at which said side edges of said absorbing component intersect said first folding guide and one of said elastic members provided in said rear waist covering region intersecting said side edges above second crossing points at which said side edges of said absorbing component intersect said second folding guide;

wherein

said absorbing component is folded along said first, second and third folding guides and tucked inwardly of said diaper to define inwardly portions;

opposing surfaces of said inwardly tucked portions are free of direct attachment to each other, allowing said absorbing component to be unfolded along all said first, second article third folding guides;

the opposing surfaces of said inwardly tucked portions are parts of the outer surface of said absorbing component; and

said inwardly tucked portions are free of all elastic members which are directly bonded to at least one of said front waist covering region and said rear waist covering region.