Patents by Inventor Kenichi Sasayama

Kenichi Sasayama 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: 20130304011
    Abstract: A disposable wearing includes a crotch chassis having a liquid-impervious sheet. The crotch chassis has a main region and opposite lateral portions lying outboard of the main region in the transverse direction and provided with leg elastic elements extending in the longitudinal direction. The opposite lateral portions respectively have fold lines extending in the longitudinal direction, outer side zones lying outboard of the respective fold lines in the transverse direction and inner side zones lying inboard of the respective fold lines in the transverse direction. The outer side zones of the respective lateral portions are folded inward and fixed to the associated inner side zones via associated bond zones extending in the longitudinal direction to form a pair of elastic lateral portions having folded back regions, respectively.
    Type: Application
    Filed: January 27, 2012
    Publication date: November 14, 2013
    Inventors: Kenichi Sasayama, Makoto Ichikawa, Kunihiko Katsuragawa
  • Publication number: 20130226119
    Abstract: An absorbent article is formed by interposing superabsorbent polymer particles between overlapping two sheets. The pad-shaped absorbent article is composed of superabsorbent polymer particles bonded to the sheet with a hot melt adhesive, absorbing areas where the sheets are not bonded and sealing areas where the sheets are bonded together and surrounding the absorbing areas. Opposed two adjacent bonding areas of the absorbing areas have the sealing areas in between and facing edges which has the sealing areas in between. One of the facing edges is defined by a wavy line having crest and trough portions.
    Type: Application
    Filed: January 25, 2012
    Publication date: August 29, 2013
    Applicant: UNICHARM CORPORATION
    Inventors: Kunihiko Katsuragawa, Kenichi Sasayama, Makoto Ichikawa
  • Publication number: 20130226124
    Abstract: A disposable pull-on wearing article includes a waist panel having a skin-facing side and non-skin-facing side and a crotch panel connected to the waist panel. The crotch panel includes a crotch inner sheet lying on the skin-facing side, a crotch outer sheet lying on the non-skin-facing side, a pair of side flaps and a pair of end flaps extending along opposite side edges and opposite end edges of the inner and outer sheets, respectively, and paired sets of leg elastics extending along the opposite side edges in a longitudinal direction. Crossover regions of longitudinally opposite end portions of the side flaps and transversely opposite lateral portions of the end flaps are folded onto the skin-facing side and the crossover regions define nonexistent regions in which none of the elastics exists and the nonexistent regions are attached to the front panel of the waist panel.
    Type: Application
    Filed: January 13, 2012
    Publication date: August 29, 2013
    Applicant: UNICHARM CORPORATION
    Inventors: Makoto Ichikawa, Kenichi Sasayama, Kunihiko Katsuragawa, Kazuo Ukegawa, Akihide Ninomiya
  • Publication number: 20130218115
    Abstract: An absorbent article having a pad configuration, including superabsorbent polymer particles. Superabsorbent polymer particles are interposed between opposed surfaces of first and second layers overlapping with each other to form an absorbent article. The article includes an absorbing region and a sealing region. In the absorbing region, the superabsorbent polymer particles are bonded to the second layer with a hot melt adhesive. In the sealing region, the first layer and the second layer are joined to each other to surround the absorbing region.
    Type: Application
    Filed: December 19, 2011
    Publication date: August 22, 2013
    Applicant: UNICHARM CORPORATION
    Inventors: Kunihiko Katsuragawa, Kenichi Sasayama, Makoto Ichikawa
  • Publication number: 20130184666
    Abstract: A disposable wearing article for reducing uncomfortable feeling of stiffness to a wearer includes a bodily fluid absorbent structure extending from front and rear waist regions to a crotch region. At least one of front and rear end portions of an intermediate panel is attached to a skin-facing side of an elastic waist panel by the intermediary of attachment zones except middle zones of the intermediate panel in a transverse direction. Between non-attachment zones provided in a middle of the intermediate panel as viewed in the transverse direction X and the elastic waist panel, middle void spaces are formed. The bodily fluid absorbent structure has a sheet shape formed of super-absorbent polymer particles wrapped with a liquid-pervious sheet. At least one of front and rear ends of the bodily fluid absorbent structure lies in the middle void spaces.
    Type: Application
    Filed: September 5, 2011
    Publication date: July 18, 2013
    Applicant: UNICHARM CORPORATION
    Inventors: Kenichi Sasayama, Makoto Ichikawa, Kunihiko Katsuragawa
  • Publication number: 20130172841
    Abstract: Disclosed is a disposable pants-type wearing article improved to prevent panels joined to one another from being peeled off from each other. A disposable pants-type wearing article includes a front panel 7, a rear panel 8 and a intermediate panel 6 joined to respective outer surfaces of these two panels 7, 8. Opposite lateral portions 34 of the intermediate panel 6 are formed by joining a pair of sheets together with a second hot melt adhesive 62. Zones coated with the second hot melt adhesive 62 include high density coated zones 72 formed by relatively large application quantity per 1 m2 and low density coated zones 71 formed by relatively small application quantity per 1 m2. Opposite end regions 36, 37 of the intermediate panel 6 joined to the front panel 7 and the rear panel 8 are at least partially formed with the high density coated zones 72.
    Type: Application
    Filed: September 8, 2011
    Publication date: July 4, 2013
    Applicant: UNICHARM CORPORATION
    Inventors: Makoto Ichikawa, Kenichi Sasayama, Hiroki Yamamoto, Kazuo Ukegawa, Akihide Ninomiya
  • Publication number: 20130123735
    Abstract: A diaper includes front and rear waist members and a crotch member. The front and rear waist members are respectively formed with first narrowly-spaced elastic zones, widely-spaced elastic zones and second narrowly-spaced elastic zones adjacent one to another. Front and rear ends of the crotch member are bonded to respective sides of the front and rear waist members so that the crotch member's front and rear ends may positionally correspond to the second narrowly-spaced elastic zones. Cover sheets are attached to the side of the crotch member to cover the crotch member's front and rear ends respectively. A length dimension of the cover sheet in the longitudinal direction is set to be smaller than those of the front and rear waist members and a length dimension of the cover sheet in the transverse direction is substantially equal to those of the front and rear waist members.
    Type: Application
    Filed: August 31, 2011
    Publication date: May 16, 2013
    Applicant: UNICHARM CORPORATION
    Inventors: Makoto Ichikawa, Kenichi Sasayama, Kunihiko Katsuragawa
  • Publication number: 20130123736
    Abstract: A diaper includes front and rear waist members and a crotch member. The front and rear waist members are respectively formed with first narrowly-spaced elastic zones, widely-spaced elastic zones and second narrowly-spaced elastic zones adjacent one to another. Front and rear ends of the crotch member are bonded to respective sides of the front and rear waist members so that the crotch member's front and rear ends may positionally correspond to the second narrowly-spaced elastic zones. Cover sheets are attached to the side of the crotch member to cover the crotch member's front and rear ends respectively. A length dimension of the cover sheet in the longitudinal direction is set to be smaller than those of the front and rear waist members and a length dimension of the cover sheet in the transverse direction is substantially equal to those of the front and rear waist members.
    Type: Application
    Filed: August 31, 2011
    Publication date: May 16, 2013
    Applicant: UNICHARM CORPORATION
    Inventors: Makoto Ichikawa, Kenichi Sasayama, Kunihiko Katsuragawa
  • Patent number: 8425485
    Abstract: The present invention provides an absorbent article having a composite sheet with a plurality of gathers on an inner surface facing a wearer's body, which fits and adheres comfortably to the wearer's skin. The composite sheet is provided which includes a stretchable non-woven fabric which expands and contracts in at least one direction, a non-stretchable non-woven fabric, a junction which binds intermittently the stretchable non-woven fabric to the non-stretchable non-woven fabric in the stretching direction, and a plurality of gathers which is formed by loosening a unbounded area of the non-stretchable non-woven fabric in a contracted state, and is arranged along a direction intersecting the stretching direction, in which an apex of each gather does not reach the neighboring gather when the gathers lean to one side of the stretchable direction.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: April 23, 2013
    Assignee: Uni-Charm Corporation
    Inventors: Tomoko Tsuji, Hirotomo Mukai, Kenichi Sasayama, Tatsuya Hashimoto, Kei Wakasugi
  • Publication number: 20130012907
    Abstract: A disposable pants-type wearing article adapted to prevent body waste from leaking out beyond the peripheries of the leg-openings when disposing of the used article. A disposable pants-type wearing article includes a front panel, a rear panel and a central panel. When the front panel and the rear panel are respectively folded with respective inner surfaces lying inside, opposite side edges of the central panel get close to each other in a midsection of a crotch region to a distance in a range of 0 to 50 mm.
    Type: Application
    Filed: March 31, 2011
    Publication date: January 10, 2013
    Applicant: UNICHARM CORPORATION
    Inventors: Kenichi Sasayama, Makoto Ichikawa, Hiroki Yamamoto, Kazuo Ukegawa, Akehide Ninomiya
  • Publication number: 20130012905
    Abstract: A disposable wearing article improved so that the crotch panel may be stably fastened to the outer surface of the waist panel and a relatively large amount of body waste may be absorbed and retained without deteriorating the absorption performance of the liquid-absorbent structure in the crotch panel. One of front and rear end portions of a crotch panel is attached to respective non-skin-facing sides of elasticized waist panels by the intermediary of bond-regions respectively including non-bond regions in midsections thereof. The waist region to which the one end portion is attached is formed at the midsection thereof with a separable portion extending in a longitudinal direction when a wearing article is put on the wearer's body.
    Type: Application
    Filed: March 29, 2011
    Publication date: January 10, 2013
    Applicant: UNICHARM CORPORATION
    Inventors: Kunihiko Katsuragawa, Kenichi Sasayama, Makoto Ichikawa
  • Publication number: 20120311771
    Abstract: A pant-type wearing article comprises a front panel, a rear panel and a central panel. The front panel cooperates with the rear panel to form a waist region. The central panel includes a front end portion separably joined to the outer side of the waist region and a rear end portion separably joined to the outer side of the waist region. Side edges of the front end portion opposed to each other in the transverse direction are formed with front side corner regions and side edges of the rear end portion opposed to each other in the transverse direction are formed with rear side corner regions. At least one of the paired front side corner regions and the paired rear side corner regions is not joined to the outer surface of the waist region to form a gripper region.
    Type: Application
    Filed: March 4, 2011
    Publication date: December 13, 2012
    Applicant: UNICHARM CORPORATION
    Inventors: Makoto Ichikawa, Kenichi Sasayama, Kunihiko Katsuragawa
  • Publication number: 20120271266
    Abstract: Provided is a disposable wearing article improved so that the tensile stress in the middle of the crotch region as well as in the vicinity thereof can be set to be higher than in the other regions without adjusting the number and thickness of the leg elastic elements and a relatively large body waist retaining space can be formed to protect the wearer's skin from being soiled with body waste. A crotch region is provided in both lateral portions thereof with a plurality of leg elastic elements extending in a longitudinal direction Y wherein the respective outermost elastic elements are laid so as to define concave curves in a middle zone of the crotch region and in the vicinity thereof.
    Type: Application
    Filed: January 5, 2011
    Publication date: October 25, 2012
    Applicant: UNICHARM CORPORATION
    Inventors: Kenichi Sasayama, Makoto Ichikawa, Hiroki Yamamoto, Kazuo Ukegawa, Akihide Ninomiya
  • Publication number: 20120259304
    Abstract: A disposable wearing article includes a liquid-absorbent structure that is adapted to be spaced from the wearer's skin to protect the wearer's skin from being soiled with body waste. A crotch member defining parts of front and rear waist regions and a crotch region has a front end lying in the front waist region and a rear end lying in the rear waist region wherein at least one of the front and rear ends defines non-bonded regions in an intermediate zone as viewed in the transverse direction X of the crotch member and is attached to the outer surface of an elastic waist panel by the intermediary of square U-shaped bonded regions opening toward the crotch region. In areas defining the non-bonded regions, body waste retaining space(s) are formed between the elastic waist panel and the crotch member.
    Type: Application
    Filed: December 16, 2010
    Publication date: October 11, 2012
    Applicant: UNICHARM CORPORATION
    Inventors: Makoto Ichikawa, Kenichi Sasayama, Hiroki Yamamoto, Kazuo Ukegawa, Akihide Ninomiya
  • Patent number: 8147474
    Abstract: The present invention provides an absorbent article 1 that does not easily warp in a leg-surrounding portion. The absorbent article 1 includes an absorbing member 2 in an elongated shape arranged along a longitudinal direction of the absorbent article, and a stretchable chassis 3 having a leg-surrounding portion 3a recessed inward in a width direction. At least a part of the chassis 3 is composed of a composite sheet 13 obtained by affixing a stretchable sheet 15 and a non-stretchable sheet 16 to each other by a plurality of adhesive portions 18. The leg-surrounding portion 3a has an intersection crossing an expansion and contraction direction of the chassis 3 at a predetermined angle. The plurality of adhesive portions 18 extend in a direction substantially perpendicular to the expansion and contraction direction.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: April 3, 2012
    Assignee: Uni-Charm Corporation
    Inventors: Kei Wakasugi, Hirotomo Mukai, Tomoko Tsuji, Kenichi Sasayama, Tatsuya Hashimoto
  • Publication number: 20120035572
    Abstract: A wearing article has crotch-elastic elements extending in a longitudinal direction. Front and rear waist members and the crotch member are bonded one another by front and rear bonded regions. The front bonded region is contoured by first and second ends and both side edges obliquely extending in the longitudinal direction so as to intersect with the first and second ends and, outboard of the both side edges in a transverse direction, non-bonded regions in which the crotch member and the front waist member are not bonded to each other are defined. Front waist-elastic elements extend between both side edges of the front waist member. The crotch-elastic elements extend from a front end to a rear end of the crotch member in the longitudinal direction. In the front bonded region, the front waist-elastic elements and the crotch-elastic elements substantially intersect one another and interlock with one another.
    Type: Application
    Filed: February 22, 2010
    Publication date: February 9, 2012
    Applicant: UNI-CHARM CORPORATION
    Inventors: Makoto Ichikawa, Kenichi Sasayama
  • Publication number: 20120035576
    Abstract: The present invention provides an absorbent article improved so that bodily fluids can be absorbed by an absorbent structure from a skin-facing side of the absorbent structure and a non-skin-facing side thereof and thereby a liquid-absorbent core can be efficiently utilized. In a diaper 10, a crotch member 40 includes a pair of skin-contactable sheets 50 spaced from each other in a transverse direction X and an outer sheet 60. Inner side edges 53, 53 of the respective skin-contactable sheets cooperate with respective second ends 25, 35 of front and rear waist members to define an opening 41. A plurality of crotch elastic members 55 are attached to the inner side edges 53, 53 of the respective skin-contactable sheets and, under the effect of these crotch elastic members 55, a length dimension of the skin-contactable sheets is substantially reduced.
    Type: Application
    Filed: February 2, 2010
    Publication date: February 9, 2012
    Applicant: UNI-CHARM CORPORATION
    Inventors: Makoto Ichikawa, Kenichi Sasayama
  • Patent number: 8105305
    Abstract: The present invention provides an absorbent article having a composite sheet with a plurality of gathers on an inner surface facing a wearer's body, which fits and adheres comfortably to the wearer's skin. The composite sheet is provided which includes a stretchable non-woven fabric which expands and contracts in at least one direction, a non-stretchable non-woven fabric, a junction which binds intermittently the stretchable non-woven fabric to the non-stretchable non-woven fabric in the stretching direction, and a plurality of gathers which is formed by loosening a unbounded area of the non-stretchable non-woven fabric in a contracted state, and is arranged along a direction intersecting the stretching direction, in which an apex of each gather does not reach the neighboring gather when the gathers lean to one side of the stretchable direction.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: January 31, 2012
    Assignee: Unicharm Corporation
    Inventors: Tomoko Tsuji, Hirotomo Mukai, Kenichi Sasayama, Tatsuya Hashimoto, Kei Wakasugi
  • Publication number: 20120022486
    Abstract: The present invention provides an absorbent article having a composite sheet with a plurality of gathers on an inner surface facing a wearer's body, which fits and adheres comfortably to the wearer's skin. The composite sheet is provided which includes a stretchable non-woven fabric which expands and contracts in at least one direction, a non-stretchable non-woven fabric, a junction which binds intermittently the stretchable non-woven fabric to the non-stretchable non-woven fabric in the stretching direction, and a plurality of gathers which is formed by loosening a unbounded area of the non-stretchable non-woven fabric in a contracted state, and is arranged along a direction intersecting the stretching direction, in which an apex of each gather does not reach the neighboring gather when the gathers lean to one side of the stretchable direction.
    Type: Application
    Filed: September 27, 2011
    Publication date: January 26, 2012
    Applicant: c/o Technical Center, Uni-Charm Corporation
    Inventors: Tomoko TSUJI, Hirotomo Mukai, Kenichi Sasayama, Tatsuya Hashimoto, Kei Wakasugi
  • Publication number: 20110301559
    Abstract: The present invention provides a disposable bodily fluid absorbent wearing article so that the article can be easily fitted to a desired region of a wearer's body. A disposable bodily fluid absorbent wearing article 1 is formed by bending a flat pad along the center line L thereof with a liquid-pervious skin-contactable sheet 2 facing outward so that a cross section taken in a transverse direction B may be invert V-shaped. In the bodily fluid-absorbent wearing article 1, respective halves of a garment-contactable sheet 3 are partially bonded to each other by means of bonding means 11 so that the posture of the pad bent in the inverted V-shape may be maintained. The garment-contactable sheet 3 is provided with fastening means 12 by which the bodily fluid absorbent wearing article 1 can be detachably fastened to the wearer's garment.
    Type: Application
    Filed: February 3, 2010
    Publication date: December 8, 2011
    Applicant: UNI-CHARM CORPORATION
    Inventors: Kenichi Sasayama, Takayoshi Konishi