Patents by Inventor Kenji Nakaoka

Kenji Nakaoka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20130110065
    Abstract: A pants-type disposable diaper has an outer covering sheet formed of a nonwoven fabric. An absorbent body is attached on the outer covering sheet to absorb excrement from the wearer. Sheet members are bonded, (also called “end sheets” or “end holding sheets”) on the front and back, each end portion of the absorbent body being positioned and fixed between the sheet member and the outer covering sheet. The sheet member may be a laminated sheet of plastic film and nonwoven fabric, stretching of the sheet member is suppressed and it is possible to easily bring the absorbent body in close contact with the crotch region of the wearer when putting the disposable diaper on the wearer. The sheet member may also be formed of nonwoven fabric, a fiber orientation of nonwoven fabric on the sheet member then being orthogonal to the edges of end portions of the outer covering sheet in the longitudinal direction, to suppress longitudinal stretching of the sheet member.
    Type: Application
    Filed: June 20, 2011
    Publication date: May 2, 2013
    Inventors: Yuki Takahashi, Emi Amano, Kenji Nakaoka
  • Publication number: 20130110070
    Abstract: A disposable diaper has an absorbent body, an outer covering sheet and two end holding sheets, and both end portions of the absorbent body are fixed between the end holding sheets and the outer covering sheet. Since a turndown portion of an upper end portion of the end holding sheet is bonded on an upper end portion of a first covering sheet, a waist covering portion has structure where the first covering sheet is laminated on the two-layered end holding sheet. Therefore, a thickness of the outer covering sheet can be reduced, while maintaining strength of the waist covering portion by appropriately selecting material of the end holding sheet, thereby to easily improve softness of the disposable diaper. Since an upper end of a second covering sheet is positioned below the turndown portion, softness and breathability in an area between the turndown portion and the second covering sheet is increased.
    Type: Application
    Filed: July 11, 2011
    Publication date: May 2, 2013
    Inventors: Kenji Nakaoka, Yuki Takahashi
  • Publication number: 20130102988
    Abstract: An outer covering sheet (4) of a pants-type disposable diaper (1) has a front part and a back part (403) to be positioned on a front side and a back side of a wearer, and a middle part lying between the both. An absorbent body (20) is attached on the outer covering sheet (4), to absorb excrement from the wearer. In the absorbent body (20), both end portions positioned in the front part and the back part (403) are folded toward the inner surface (40) of the outer covering sheet (4) to be bonded on the inner surface (40). It is therefore possible to prevent skin of the wearer from being irritated by edges (241) of the both end portions of the absorbent body (20) when the disposable diaper (1) is worn.
    Type: Application
    Filed: June 15, 2011
    Publication date: April 25, 2013
    Inventors: Kenji Nakaoka, Yuki Takahashi, Emi Amano
  • Patent number: 8235961
    Abstract: A disposable pants-type diaper of the present invention comprises a diaper main body including a front portion, a back portion, and a crotch portion positioned therebetween, and having a waist opening and a pair of leg openings formed by joining the front portion and the back portion; an absorbent core disposed in the crotch portion; a first elastic means disposed along an upper part of an edge of the both leg openings; and a second elastic means disposed in a middle part in a front-back direction of the crotch portion, extending in a diaper width direction to near the edge of the both leg openings, and having straight side edge portions. According to the disposable pants-type diaper of the above, a foot is hardly caught by the edge of the leg opening in wearing, resulting in easily wearing; and a fitting property of the crotch portion is excellent.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: August 7, 2012
    Assignee: Livedo Corporation
    Inventors: Kenji Nakaoka, Yuki Takahashi
  • Publication number: 20120095430
    Abstract: A pants-type disposable diaper 1 comprising: a diaper main body 2 having a front part P, a back part Q, and a crotch part R therebetween, and having a waist opening 3 and a pair of leg openings 4; an absorbent core 10 disposed at the crotch part R; a first elastic member 13 disposed continuously, and having a first crotch-crossing part 13A which extends across the crotch part R and a first leg opening edge part 13B which extends along edges 15 of a front side of the both leg openings 4; and a second elastic member 14 disposed so as to be spaced from the first elastic member 13, and having a second crotch-crossing part 14A which extends intermittently across the crotch part R and a second leg opening edge part 14B which extends along edges 15 of a back side of the both leg openings 4.
    Type: Application
    Filed: July 13, 2010
    Publication date: April 19, 2012
    Applicant: LIVEDO CORPORATION
    Inventors: Kenji Nakaoka, Yuki Takahashi
  • Publication number: 20120083757
    Abstract: A pants-type disposable diaper comprising: a pants-shaped outer member having a front part, a back part, and a crotch part positioned between the front part and the back part, and having a waist opening and a pair of leg openings formed by joining the front part and the back part; and an absorbent main body disposed on an inner surface of the pants-shaped outer member at the crotch part, and comprising a top sheet, a back sheet, and an absorbent core disposed between the top sheet and the back sheet; wherein the pants-shaped outer member comprises an inner sheet and an outer sheet, and the inner sheet and the outer sheet are made of a spunbonded nonwoven fabric produced by melting a polymer composition containing polyolefin and/or polyester and a surfactant. According to the pants-type disposable diaper on the above, the pants-shaped outer member is excellent in water resistance and softness.
    Type: Application
    Filed: March 9, 2010
    Publication date: April 5, 2012
    Inventors: Yuki Takahashi, Kenji Nakaoka
  • Publication number: 20120083756
    Abstract: A pants-type disposable diaper comprises: a pants-shaped outer member having a front part, a back part, and a crotch part positioned between the front part and the back part, and having a waist opening and a pair of leg openings formed by joining the front part and the back part; an absorbent main body disposed on an inner surface of the pants-shaped outer member at the crotch part, and comprising a top sheet, a back sheet, and an absorbent core disposed between the top sheet and the back sheet; and an end-holding sheet covering a longitudinal end of the absorbent main body at the front part and/or the back part of the pants-shaped outer member, and attached to the pants-shaped outer member and the absorbent main body with a hot-melt adhesive; wherein the end-holding sheet includes a composite nonwoven fabric in which a spunbonded nonwoven fabric layer is laminated on an inner surface of a meltblown nonwonven fabric layer.
    Type: Application
    Filed: March 15, 2010
    Publication date: April 5, 2012
    Inventors: Yuki Takahashi, Kenji Nakaoka
  • Publication number: 20120078213
    Abstract: A pants-type disposable diaper 1 comprising: a diaper main body 2 having a front part P, a back part Q, and a crotch part R therebetween, and having a waist opening 3 and a pair of leg openings 4; an absorbent core 10 disposed at the crotch part R; a first elastic member 13 having a first crotch-crossing part 13A which extends intermittently across the crotch part R and a first leg opening edge part 13B which extends along edges 15 of a front side of the both leg openings 4; and a second elastic member 14 disposed continuously so as to be spaced from the first elastic member 13, and having a second crotch-crossing part 14A which extends across the crotch part R and a second leg opening edge part 14B which extends along edges 15 of a back side of the both leg openings 4.
    Type: Application
    Filed: July 13, 2010
    Publication date: March 29, 2012
    Applicant: LIVEDO CORPORATION
    Inventors: Kenji Nakaoka, Yuki Takahashi
  • Publication number: 20120065605
    Abstract: A pant-type disposable diaper comprises: a pants-shaped outer member having a front part, a back part, and a crotch part positioned between the front part and the back part, and having a waist opening and a pair of leg openings formed by joining the front part and the back part; and an absorbent main body disposed on an inner surface of the pants-shaped outer member at the crotch part, and comprising a top sheet, a back sheet, and an absorbent core disposed between the top sheet and the back sheet; wherein the pants-shaped outer member comprises a first sheet made of a spunbonded nonwoven fabric produced by melting a polymer composition containing polyolefin and/or polyester and a surfactant. According to the pants-type disposable diaper on the above, the pants-shaped outer member is excellent in water resistance and softness.
    Type: Application
    Filed: March 9, 2010
    Publication date: March 15, 2012
    Inventors: Yuki Takahashi, Kenji Nakaoka
  • Patent number: 8034039
    Abstract: Disposable pants allow a crotch section and a front abdominal section to be bonded securely while ensuring the stretchability of the front abdominal section in a pants structure in which the crotch section and front abdominal section formed as separate members are bonded. The disposable pants have functions of both pants and a diaper, and a left front abdominal part and a right front abdominal part can be developed to the left and right by breaking left and right breaking parts. The left front abdominal part and right front abdominal part are provided with adhesive pieces to be attached/detached to/from adhesive parts of a central front abdominal part. A crotch section on which an absorber is provided is connected to the central front abdominal part using sheet members so as not to interfere with stretchability of the central front abdominal part resulting from an elastic member.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: October 11, 2011
    Assignee: Livedo Corporation
    Inventors: Kenji Nakaoka, Masaru Fujioka
  • Patent number: 7753899
    Abstract: In a rising gathered member 4 of an absorbent main body 3 attached to an external sheet 2, an inward folded base end 4b is joined astride a side end 13a of a top sheet 13 as a top surface of the absorbent main body 3 and a side end 14a of a back sheet 14 so that the rising gathered member 4 rises from a most side edge 3a in a width direction of the absorbent main body 3 and, also, the back sheet 14 of the absorbent main body 3 is attached onto a skin-contacting surface side of a crotch part R of a second external sheet 8 at an inward position at a prescribed width W5 from the most side edge 3a of the absorbent main body 3 as an outermost joint position. With the above constitution, it is possible to effectively prevent any lateral leakage of urine and the like, even if a disposable absorbent article is shifted.
    Type: Grant
    Filed: June 20, 2003
    Date of Patent: July 13, 2010
    Assignee: Livedo Corporation
    Inventors: Kazuyo Mori, Kenji Nakaoka, Masaru Fujioka, Taichiro Suzuki, Sayaka Sato
  • Publication number: 20100100069
    Abstract: In an absorbent product (1), each of a pair of side wall parts 34 has two side wall end parts (341) bonded on both end portions of a bonded part (33) and a standing part (342) standing up from the main body part (2) between the two side wall end parts (341). The side wall part (34) is folded outwardly at an inner edge of the bonded part (33) and further folded inwardly. Each side wall end part (341) has a bonded section (3411) and a half standing part (3412) which is continuous from the standing part (342). The half standing part (3412) stands up from the main body part (2) lower than the standing part (342) and fits the vicinity of wearer's crotch in wearing. Thus, it is possible to prevent side leakage from the vicinity of end portions in a longitudinal direction of the absorbent product (1).
    Type: Application
    Filed: October 6, 2009
    Publication date: April 22, 2010
    Inventor: Kenji NAKAOKA
  • Publication number: 20100094239
    Abstract: A disposable pants-type diaper of the present invention comprises a diaper main body including a front portion, a back portion, and a crotch portion positioned therebetween, and having a waist opening and a pair of leg openings formed by joining the front portion and the back portion; an absorbent core disposed in the crotch portion; a first elastic means disposed along an upper part of an edge of the both leg openings; and a second elastic means disposed in a middle part in a front-back direction of the crotch portion, extending in a diaper width direction to near the edge of the both leg openings, and having straight side edge portions. According to the disposable pants-type diaper of the above, a foot is hardly caught by the edge of the leg opening in wearing, resulting in easily wearing; and a fitting property of the crotch portion is excellent.
    Type: Application
    Filed: October 1, 2009
    Publication date: April 15, 2010
    Inventors: Kenji NAKAOKA, Yuki Takahashi
  • Patent number: 7338479
    Abstract: A bondable innermost edge e? of a hot melt adhesive to be applied to a base end 4a of each of a pair of raisable flaps 4 is disposed outside away from an inner edge 4d of the base end 4a in a state that each raisable flap 4 is folded into a multi-layered manner in bonding the base ends 4a of the raisable flaps 4 to an outer sheet at the opposite sides of an absorbent member 3 with the hot melt adhesive. This arrangement eliminates the likelihood that a free end 4b of each raisable flap 4 may be adhered to the base end 4a by an excessively and extensively applied adhesive portion even if the adhesive is excessively and extensively applied.
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: March 4, 2008
    Assignee: Livedo Corporation
    Inventors: Masaru Fujioka, Kenji Nakaoka, Kazuyo Mori, Taichiro Suzuki, Sayaka Sato
  • Publication number: 20080021425
    Abstract: The present invention provides disposable pants allowing a crotch section and a front abdominal section to be bonded securely while ensuring stretchability of the front abdominal section in a pants structure in which the crotch section and front abdominal section formed as separate members are bonded. The disposable pants (1) have functions of both pants and a diaper, and a left front abdominal part (2a) and a right front abdominal part (2b) can be developed to the left and right by breaking left and right breaking parts (17a, 17b). The left front abdominal part (2a) and right front abdominal part (2b) are provided with adhesive pieces (22a, 22b) to be attached/detached to/from adhesive parts (23a, 23b) of a central front abdominal part (2c). A crotch section (4) on which an absorber (43) is provided is connected to the central front abdominal part (2c) using sheet members (45a, 45b) so as not to interfere with stretchability of the central front abdominal part (2c) resulting from an elastic member (19c).
    Type: Application
    Filed: December 6, 2005
    Publication date: January 24, 2008
    Applicant: LIVEDO CORPORATION
    Inventors: Kenji Nakaoka, Masaru Fujioka
  • Publication number: 20070093164
    Abstract: A disposable absorbent article includes an absorbent mat provided between a liquid-permeable top sheet and a liquid-impermeable back sheet. Herein, the absorbent mat includes a sheet-like water-absorbent layer that contains a water-absorbent resin powder but that does not contain pulp fibers, and a fiber assembly layer that contains both the water-absorbent resin powder and the pulp fibers, the sheet-like water-absorbent layer and the fiber assembly layer arranged sequentially in this order from a top sheet side. The fiber assembly layer includes a fiber presence region in which both the pulp fibers and the water-absorbent resin powder are present, and a fiber absence region in which both the pulp fibers and the water-absorbent resin powder are absent, the fiber presence region and the fiber absence region formed to be adjacent with each other.
    Type: Application
    Filed: May 10, 2004
    Publication date: April 26, 2007
    Applicant: Livedo Corporation
    Inventor: Kenji Nakaoka
  • Patent number: 6991622
    Abstract: Inventive disposable underpants are provided with an underpants member formed of a first sheet as an outermost layer and a second sheet located inside the first sheet; an absorbent member provided on the second sheet at the inner side of the underpants member; and a trunk fittable elastic member for fitting the trunk tightly held between the first and second sheets, wherein absorbent member fixing sheets each folded to form an upper and a lower portions are transversely arranged below the absorbent member, and the upper portions of the absorbent member fixing sheets are joined with a lower surface of the absorbent member, whereas the lower portions thereof are joined with an upper surface of the second sheet. Thus, even if the disposable underpants were formed using a thin absorbent member, the absorbent member could suppress a lateral leak of urine without being twisted while the disposable underpants were worn.
    Type: Grant
    Filed: February 8, 2001
    Date of Patent: January 31, 2006
    Assignee: Livedo Corporation
    Inventors: Kenji Nakaoka, Masaru Fujioka, Satoshi Maeda, Kazuyo Mori
  • Patent number: D621032
    Type: Grant
    Filed: April 14, 2009
    Date of Patent: August 3, 2010
    Assignee: Livedo Corporation
    Inventors: Kenji Nakaoka, Yuki Takahashi
  • Patent number: D621033
    Type: Grant
    Filed: April 14, 2009
    Date of Patent: August 3, 2010
    Assignee: Livedo Corporation
    Inventors: Kenji Nakaoka, Yuki Takahashi
  • Patent number: D621034
    Type: Grant
    Filed: April 14, 2009
    Date of Patent: August 3, 2010
    Assignee: Livedo Corporation
    Inventors: Kenji Nakaoka, Yuki Takahashi