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US6264643: Pull-on type disposable diaper

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Filing Information

Inventor(s) Harumitsu Toyoda ·
Assignee(s) Kao Corporation ·
Attorney/Agent(s) Birch, Stewart, Kolasch & Birch, LLP ·
Primary Examiner John G. Weiss ·
Assistant Examiner K. M. Reichle ·
Application Number US8550521
Filing date 10/30/1995
Issue date 07/24/2001
Predicted expiration date 04/01/2017
Patent term adjustment 956
U.S. Classifications 604/385.29  · 604/385.13  · 604/396  · 604/385.3  ·
International Classifications --
Kind CodeB1
International Classifications 6043851-387 · 604389-396 · 60438501 ·
Related U.S. Application DataThis application is a continuation of application Ser. No. 08/293,097 filed on Aug. 19, 1994, now abandoned.
Foreign Priority JP5218912 - 09/02/1993 · JP5267064 - 10/26/1993 ·
8 Claims, 4 Drawings


Abstract

A shorts type disposable diaper includes a body having a liquid permeable topsheet, a liquid impermeable backsheet, and an absorbent member interposed between the topsheet and the backsheet. The body includes a stomach-side portion which is located on the stomach side of a diaper wearer when the diaper is worn, a back-side portion which is located on the back side of the wearer when the diaper is worn, and a crotch portion which is located between the stomach-side portion and the back-side portion. The body has a pair of first expansible side panels, each of the first expansible side panels being affixed to each longitudinal side of the stomach-side portion and a pair of second expansible side panels, each of the second expansible side panels being affixed to each longitudinal side of the back-side portion. The first expansible side panels of the stomach-side portion are affixed to the second expansible side panels of said back-side portion to thereby define a waist opening portion, a pair of leg opening portions and a body-surrounding portion located around the wearers body when the diaper is worn. Elastic members are arranged on an area adjacent to the waist opening portion and on the body-surrounding portion in the stomach-side and back-side portions. A substantially continuous gather is formed along an entire periphery of the diaper through the stomach-side portion, the back-side portion and the first and second expansible panels.

Independent Claims | See all claims (8)

  1. 1. A pull-on disposable diaper comprising: a rectangular body having opposing longitudinal sides, said body further having a topsheet formed of a liquid permeable first material, a backsheet formed of a liquid impermeable second material different from said first material, and an absorbent member interposed between said topsheet and said backsheet; a stomach-side portion located on a stomach side of a diaper wearer when the diaper is worn, a back-side portion located on a back side of the wearer when the diaper is worn, and a crotch portion located between said stomach-side portion and said back-side portion; a pair of first expansible side panels separately formed of a third material different from said first material, each of said first expansible side panels being affixed to said opposing longitudinal sides of said body adjacent to said stomach-side portion; a pair of second expansible side panels separately formed of said third material, each of said second expansible side panels being affixed to said opposing longitudinal sides of said body adjacent to said back-side portion; affixing means for affixing said pair of first expansible side panels to said opposing longitudinal sides of said body adjacent to said stomach-side portion and for affixing said pair of second expansible side panels to said opposing longitudinal sides of said body adjacent to said back-side portion; said first expansible side panels of said stomach-side portion being affixed to said second expansible side panels of said back-side portion to thereby define a waist opening portion, a pair of leg opening portions and a body-surrounding portion located around the wearers body when the diaper is worn; and first elastic members arranged on an area adjacent to said waist opening portion and second elastic members arranged on said body-surrounding portion in said stomach-side and back-side portions, each of said first and second elastic members having opposing ends which terminate within said body; wherein a substantially continuous gather is formed along an entire periphery of the diaper through said stomach-side portion, said back-side portion and said first and second expansible side panels, and wherein a plurality of said first elastic members in the area adjacent to said waist opening portion are arranged substantially in parallel with a peripheral edge of said waist opening portion with a predetermined space between each of said plurality of first elastic members; and said second elastic members in said body-surrounding portion are arranged in such a manner that at least a part of said second elastic members cooperatively form a loop.
  2. 3. A pull-on disposable diaper comprising: a rectangular body having opposing longitudinal sides, said body further having a topsheet formed of a liquid permeable first material, a backsheet formed of a liquid impermeable second material different from said first material, and an absorbent member interposed between said topsheet and said backsheet; a stomach-side portion located on a stomach side of a diaper wearer when the diaper is worn, a back-side portion located on a back side of the wearer when the diaper is worn, and a crotch portion located between said stomach-side portion and said back-side portion; a pair of first expansible side panels separately formed of a third material different from said first material, each of said first expansible side panels being affixed to said opposing longitudinal sides of said body adjacent to said stomach-side portion; a pair of second expansible side panels separately formed of said third material, each of said second expansible side panels being affixed to said opposing longitudinal sides of said body adjacent to said back-side portion; affixing means for affixing said pair of first expansible side panels to said opposing longitudinal sides of said body adjacent to said stomach-side portion and for affixing said pair of second expansible side panels to said opposing longitudinal sides of said body adjacent to said back-side portion; said first expansible side panels of said stomach-side portion being affixed to said second expansible side panels of said back-side portion to thereby define a waist opening portion, a pair of leg opening portions and a body-surrounding portion located around the wearers body when the diaper is worn; and first elastic members arranged on an area adjacent to said waist opening portion and second elastic members arranged on said body-surrounding portion in said stomach-side and back-side portions, each of said first and second elastic members having opposing ends which terminate within said body; wherein a substantially continuous gather is formed along an entire periphery of the diaper through said stomach-side portion, said back-side portion and said first and second expansible side panels, and wherein said first elastic members in the areas adjacent to said waist opening portion are different in contracting stress from said second elastic members in said body-surrounding portions and said first elastic members in the areas adjacent to said waist opening portion have a greater stress at 50% stretch than said second elastic members in said body-surrounding portion.
  3. 5. A pull-on disposable diaper comprising: a rectangular body having opposing longitudinal sides, said body further having a topsheet formed of a liquid permeable first material, a backsheet formed of a liquid impermeable second material different from said first material, and an absorbent member interposed between said topsheet and said backsheet; a stomach-side portion located on a stomach side of a diaper wearer when the diaper is worn, a back-side portion located on a back side of the wearer when the diaper is worn, and a crotch portion located between said stomach-side portion and said back-side portion; a pair of first expansible side panels separately formed of a third material different from said first material, each of said first expansible side panels being affixed to said opposing longitudinal sides of said body adjacent to said stomach-side portion; a pair of second expansible side panels separately formed of said third material, each of said second expansible side panels being affixed to said opposing longitudinal sides of said body adjacent to said back-side portion; affixing means for affixing said pair of first expansible side panels to said opposing longitudinal sides of said body adjacent to said stomach-side portion and for affixing said pair of second expansible side panels to said opposing longitudinal sides of said body adjacent to said back-side portion; said first expansible side panels of said stomach-side portion being affixed to said second expansible side panels of said back-side portion to thereby define a waist opening portion, a pair of leg opening portions and a body-surrounding portion located around the wearers body when the diaper is worn; and first elastic members arranged on an area adjacent to said waist opening portion and second elastic members arranged on said body-surrounding portion in said stomach-side and back-side portions, each of said first and second elastic members having opposing ends which terminate within said body; wherein a substantially continuous gather is formed along an entire periphery of the diaper through said stomach-side portion, said back-side portion and said first and second expansible side panels, and wherein said first elastic members in said back-side portion and said stomach-side portion defining said waist opening portion are different in stress at 50% stretch.
  4. 6. A pull-on disposable diaper comprising: a rectangular body having opposing longitudinal sides, said body further having a topsheet formed of a liquid permeable first material, a backsheet formed of a liquid impermeable second material different from said first material, and an absorbent member interposed between said topsheet and said backsheet; a stomach-side portion located on a stomach side of a diaper wearer when the diaper is worn, a back-side portion located on a back side of the wearer when the diaper is worn, and a crotch portion located between said stomach-side portion and said back-side portion; a pair of first expansible side panels separately formed of a third material different from said first material, each of said first expansible side panels being affixed to said opposing longitudinal sides of said body adjacent to said stomach-side portion; a pair of second expansible side panels separately formed of said third material, each of said second expansible side panels being affixed to said opposing longitudinal sides of said body adjacent to said back-side portion; affixing means for affixing said pair of first expansible side panels to said opposing longitudinal sides of said body adjacent to said stomach-side portion and for affixing said pair of second expansible side panels to said opposing longitudinal sides of said body adjacent to said back-side portion; said first expansible side panels of said stomach-side portion being affixed to said second expansible side panels of said back-side portion to thereby define a waist opening portion, a pair of leg opening portions and a body-surrounding portion located around the wearers body when the diaper is worn; and first elastic members arranged on an area adjacent to said waist opening portion and second elastic members arranged on said body-surrounding portion in said stomach-side and back-side portions, each of said first and second elastic members having opposing ends which terminate within said body; wherein a substantially continuous gather is formed along an entire periphery of the diaper through said stomach-side portion, said back-side portion and said first and second expansible side panels, and wherein said first and second expansible side panels are formed of longitudinally arranged alternating expansible and non-expansible portions.

References Cited

U.S. Patent Documents

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US4319572* Molnlycke AB Widlund et al. Mar 1982
US4641381 Kimberly-Clark Corporation Heran et al. Feb 1987
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Foreign Patent Documents

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EP0320991KIMBERLY-CLARK CORPORATIONJun 1989
EP0487921KAO CORPORATIONMar 1992
EP0526868KIMBERLY-CLARK CORPORATIONFeb 1993
EP0547497KIMBERLY-CLARK WORLDWIDE, INC.Jun 1993
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* cited by examiner

Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
US7459050 SCA Hygiene Products AG Birgitta Karlsson et al. Dec 2008
US6645190 Kimberly-Clark Worldwide, Inc. Christopher Peter Olson et al. Nov 2003
US6752796 First Quality Products, Inc. Hamzeh Karami Jun 2004
US6849067 Kimberly-Clark Worldwide, Inc. Amy Lynn Fletcher et al. Feb 2005
US6764475 Kimberly-Clark Worldwide, Inc. Christopher Peter Olson Jul 2004
US7419562 Kimberly-Clark Worldwide, Inc. Paul T. Van Gompel et al. Sep 2008
US6905488 Kimberly-Clark Worldwide, Inc. Christopher Peter Olson Jun 2005
US6620146 Paragon Trade Brands, Inc. Bernadette Mary Gibbs Sep 2003
US6575953 Kimberly-Clark Worldwide, Inc. Christopher Peter Olson Jun 2003
US7220335 Kimberly-Clark Worldwide, Inc. Paul T. Van Gompel et al. May 2007
US6554816 Kimberly-Clarke Worldwide, Inc. Christopher Peter Olson Apr 2003
US6726669 Uni-Charm Corporation Takaaki Shimada et al. Apr 2004
US6979380 Kimberly-Clark Worldwide, Inc. Russell E. Thorson et al. Dec 2005
US7534237 Kimberly-Clark Worldwide, Inc. Christopher Peter Olson et al. May 2009
US6761711 Kimberly-Clark Worldwide, Inc. Amy Lynn Fletcher et al. Jul 2004
US7887526 Kimberly-Clark Worldwide, Inc. Paul T. Van Gompel et al. Feb 2011
US7695464 Kimberly-Clark Worldwide, Inc. Amy Lynn Fletcher et al. Apr 2010
US7708857 Uni-Charm Corporation Kazuo Ukegawa May 2010
US7749211 Kimberly-Clark Worldwide, Inc. Paul T. Van Gompel et al. Jul 2010
US7837665 Kimberly-Clark Worldwide, Inc. Paul T. Van Gompel et al. Nov 2010
US7972459 Uni-Charm Corporation Kazuo Ukegawa Jul 2011
US8012296 Uni-Charm Corporation Kazuo Ukegawa Sep 2011
US8043273 Kimberly-Clark Worldwide, Inc. Paul T. Van Gompel et al. Oct 2011
US8216414 Paul Hartman AG Fridmann Hornung et al. Jul 2012
US8419882 --
US8568377 --
US8551064 --
US8672824 --

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