Patents by Inventor Hirotomo Mukai

Hirotomo Mukai 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).

  • Patent number: 11357670
    Abstract: An absorbent article including an absorbent main body including an absorbent core; and a pair of leak-proof walls. The pair of leak-proof walls are on respective widthwise side portions of the absorbent main body. Each of the leak-proof walls is capable of standing on a skin side in the thickness direction. The absorbent core includes a low-basis-weight portion in a widthwise central portion. The low-basis-weight portion has a basis weight of the absorbent core smaller than the basis weight in a surrounding portion. A joined part is formed by joining a surface of the skin-side portion and a surface of the non-skin-side portion, the surfaces facing to each other. The joined part is provided inside a distal end of the leak-proof wall and outside the low-basis-weight portion in the width direction. A part of the joined part and a part of the low-basis-weight portion overlap in the longitudinal direction.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: June 14, 2022
    Assignee: UNICHARM CORPORATION
    Inventors: Hirotomo Mukai, Takahito Nagai
  • Patent number: 11318053
    Abstract: An absorbent article includes: an absorbent main body including an absorbent core; and leak-proof walls on respective widthwise side portions of the absorbent main body. Each leak-proof wall is capable of standing on a skin side in the thickness direction, and includes a skin-side portion and a non-skin-side portion. A joined part is formed by joining at least partially facing surfaces of the skin-side and non-skin-side portions. The absorbent main body includes a crotch stretchable portion in a central portion in the width direction and the longitudinal direction, and the crotch stretchable portion stretches/contracts in at least one of the longitudinal direction and the width direction. The joined part is provided inside a distal end of the leak-proof wall and outside the crotch stretchable portion in the width direction. A part of the joined part and a part of the crotch stretchable portion at least overlap in the longitudinal direction.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: May 3, 2022
    Assignee: UNICHARM CORPORATION
    Inventors: Hirotomo Mukai, Takahito Nagai
  • Patent number: 11129758
    Abstract: An absorbent article includes an absorbent core, a top sheet provided on a skin-side of a thickness direction of the absorbent core, and a second sheet arranged between the absorbent core and the top sheet in the thickness direction and to be placed in a wearer's inseam. The top sheet has a plurality of protrusions formed along a longitudinal direction and spaced apart in a horizontal direction. The second sheet is smaller than the top sheet in the horizontal direction. The top sheet has an overlapping region overlapping with the second sheet in the thickness direction and both end regions separated by a predetermined distance outward from the overlapping region in the horizontal direction and provided to overlap with the overlapping region in the longitudinal direction. A horizontal pitch of the protrusions in the overlapping region is larger than a horizontal pitch of the protrusions in the two end regions.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: September 28, 2021
    Assignee: UNICHARM CORPORATION
    Inventor: Hirotomo Mukai
  • Patent number: 10925778
    Abstract: An absorbent article includes an absorbent main body; a stomach-side member at an end portion on one side of the absorbent main body; and a back-side member at an end portion on another side. The absorbent main body has a pair of leak-proof walls in respective side end portions. Each of the leak-proof walls has a skin-side portion that includes a plurality of elastic members and a non-skin-side portion. The pair of leak-proof walls each have a joining portion in which mutually opposing surfaces of the skin-side portion and the non-skin-side portion are joined, and a non-joining portion above the joining portion. The mutually opposing surfaces are not joined in the non-joining portion. The joining portions are inward, with respect to the width direction, of leading ends of the leak-proof walls. Each of the joining portions is overlapped with the stomach-side member or the back-side member in an up-down direction.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: February 23, 2021
    Assignee: UNICHARM CORPORATION
    Inventors: Hirotomo Mukai, Takahito Nagai, Kuniyoshi Kawabata, Naotaka Mimura
  • Patent number: 10729596
    Abstract: A pants-type absorbent article for which damage during wearing motions can be suppressed. The pants-type absorbent article includes: a front waist region; a rear waist region; a crotch region; a waist opening defined by the front waist region and the rear waist region and disposed to surround a waist of the wearer; an external topsheet provided on at least one of the front waist region and the rear waist region; and an external backsheet bonded to the external topsheet. The external backsheet has a folded-back portion folded back at the waist opening, the folded-back portion extending beyond the external topsheet toward to the waist opening. A reinforcing sheet extends in a transverse direction orthogonally crossing the front-back direction and to overlap at least part of the folded-back portion. The reinforcing sheet has a length in the front-back direction longer than a length of the folded-back portion in the front-back direction.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: August 4, 2020
    Assignee: UNICHARM CORPORATION
    Inventors: Hirotomo Mukai, Akihide Ninomiya, Akihisa Shiomi
  • Publication number: 20190328586
    Abstract: An absorbent article includes: an absorbent main body including an absorbent core; and leak-proof walls on respective widthwise side portions of the absorbent main body. Each leak-proof wall is capable of standing on a skin side in the thickness direction, and includes a skin-side portion and a non-skin-side portion. A joined part is formed by joining at least partially facing surfaces of the skin-side and non-skin-side portions. The absorbent main body includes a crotch stretchable portion in a central portion in the width direction and the longitudinal direction, and the crotch stretchable portion stretches/contracts in at least one of the longitudinal direction and the width direction. The joined part is provided inside a distal end of the leak-proof wall and outside the crotch stretchable portion in the width direction. A part of the joined part and a part of the crotch stretchable portion at least overlap in the longitudinal direction.
    Type: Application
    Filed: June 5, 2017
    Publication date: October 31, 2019
    Inventors: Hirotomo MUKAI, Takahito NAGAI
  • Publication number: 20190262194
    Abstract: An absorbent article including an absorbent main body including an absorbent core; and a pair of leak-proof walls. The pair of leak-proof walls are on respective widthwise side portions of the absorbent main body. Each of the leak-proof walls is capable of standing on a skin side in the thickness direction. The absorbent core includes a low-basis-weight portion in a widthwise central portion. The low-basis-weight portion has a basis weight of the absorbent core smaller than the basis weight in a surrounding portion. A joined part is formed by joining a surface of the skin-side portion and a surface of the non-skin-side portion, the surfaces facing to each other. The joined part is provided inside a distal end of the leak-proof wall and outside the low-basis-weight portion in the width direction. A part of the joined part and a part of the low-basis-weight portion overlap in the longitudinal direction.
    Type: Application
    Filed: June 5, 2017
    Publication date: August 29, 2019
    Inventors: Hirotomo MUKAI, Takahito NAGAI
  • Publication number: 20190254884
    Abstract: An absorbent article includes an absorbent main body; a stomach-side member at an end portion on one side of the absorbent main body; and a back-side member at an end portion on another side. The absorbent main body has a pair of leak-proof walls in respective side end portions. Each of the leak-proof walls has a skin-side portion that includes a plurality of elastic members and a non-skin-side portion. The pair of leak-proof walls each have a joining portion in which mutually opposing surfaces of the skin-side portion and the non-skin-side portion are joined, and a non-joining portion above the joining portion. The mutually opposing surfaces are not joined in the non-joining portion. The joining portions are inward, with respect to the width direction, of leading ends of the leak-proof walls. Each of the joining portions is overlapped with the stomach-side member or the back-side member in an up-down direction.
    Type: Application
    Filed: May 18, 2017
    Publication date: August 22, 2019
    Inventors: Hirotomo MUKAI, Takahito NAGAI, Kuniyoshi KAWABATA, Naotaka MIMURA
  • Publication number: 20190133844
    Abstract: An absorbent article includes an absorbent core, a top sheet provided on a skin-side of a thickness direction of the absorbent core, and a second sheet arranged between the absorbent core and the top sheet in the thickness direction and to be placed in a wearer's inseam. The top sheet has a plurality of protrusions formed along a longitudinal direction and spaced apart in a horizontal direction. The second sheet is smaller than the top sheet in the horizontal direction. The top sheet has an overlapping region overlapping with the second sheet in the thickness direction and both end regions separated by a predetermined distance outward from the overlapping region in the horizontal direction and provided to overlap with the overlapping region in the longitudinal direction. A horizontal pitch of the protrusions in the overlapping region is larger than a horizontal pitch of the protrusions in the two end regions.
    Type: Application
    Filed: January 25, 2017
    Publication date: May 9, 2019
    Inventor: Hirotomo MUKAI
  • Patent number: 10098795
    Abstract: An absorbent article that has an exterior body. In the exterior body is an edge part which is forming a part of the leg opening unit. A rear end of the absorber is positioned in the crotch region so as not to overlap with a waistline elastic member. In an absorber disposition region in which the absorber is disposed, an end in a widthwise direction of the exterior body is positioned inside in the widthwise direction more significantly than an end in the widthwise direction of the absorber, and a part of a leg-holes elastic member is disposed.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: October 16, 2018
    Assignee: Unicharm Corporation
    Inventors: Hirotomo Mukai, Takaya Arayama
  • Patent number: 10092458
    Abstract: An absorbent article is provided with a central elastic material for positioning in a state in which it is extended in the front/rear direction in the outer direction in relation to an absorbent body, and an elastic material cover sheet which abuts the outer direction side surface of the central elastic material. The elastic material cover sheet covers an extension region where the central elastic material is positioned in an extended state, and a non-extension region where the central elastic material is positioned in a non-extended state. An adhesive agent for fixing in the extended state is coated onto the central elastic material of the extension region. An adhesive agent is coated onto at least the non-extension region of the outer direction side surface of the elastic material cover sheet, and the adhesive agent coated onto the outer direction side surface penetrates to the inner direction side surface of the elastic material cover sheet.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: October 9, 2018
    Assignee: UNICHARM CORPORATION
    Inventors: Hirotomo Mukai, Kenji Takeuchi, Takaya Arayama
  • Patent number: 10052238
    Abstract: A method of manufacturing a pants-type diaper comprises: a step (A) of conveying a first continuous sheet; a step (B) of laminating a plurality of continuous elastic bodies on an inner side of the first continuous sheet, laminating a second continuous sheet, and bonding at least a part of the continuous elastic bodies and the second continuous sheet; a step (C) of cutting a part of continuous elastic bodies from an outer side of the second continuous sheet or an outer side of the first continuous sheet; and a step (D) of disposing the absorbent body so as to arrange the absorber in a predetermined region. In the step (C), a part of the continuous elastic bodies that is not bonded to the first continuous sheet is cut in a region for forming the pants-type diaper, the region other than a predetermined region for arranging the absorber.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: August 21, 2018
    Assignee: UNICHARM CORPORATION
    Inventors: Hirotomo Mukai, Akihide Ninomiya, Akihisa Shiomi
  • Publication number: 20180185203
    Abstract: A pants-type absorbent article for which damage during wearing motions can be suppressed. The pants-type absorbent article includes: a front waist region; a rear waist region; a crotch region; a waist opening defined by the front waist region and the rear waist region and disposed to surround a waist of the wearer; an external topsheet provided on at least one of the front waist region and the rear waist region; and an external backsheet bonded to the external topsheet. The external backsheet has a folded-back portion folded back at the waist opening, the folded-back portion extending beyond the external topsheet toward to the waist opening. A reinforcing sheet extends in a transverse direction orthogonally crossing the front-back direction and to overlap at least part of the folded-back portion. The reinforcing sheet has a length in the front-back direction longer than a length of the folded-back portion in the front-back direction.
    Type: Application
    Filed: May 25, 2016
    Publication date: July 5, 2018
    Inventors: Hirotomo MUKAI, Akihide NINOMIYA, Akihisa SHIOMI
  • Patent number: 9889050
    Abstract: An absorbent article that has an absorber which is disposed in the crotch region and an absorber backsheet which is positioned at the outer direction side of the absorber. At least either one of a front end of the absorber and a rear end of the absorber is disposed in the crotch region. In the front end of the absorber backsheet and the rear end of the absorber backsheet, an end at a side at which the absorber is positioned in the crotch region is disposed outboard of the crotch region in the longitudinal direction.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: February 13, 2018
    Assignee: Unicharm Corporation
    Inventors: Takaya Arayama, Hirotomo Mukai
  • Patent number: 9801764
    Abstract: A disposable wearing article includes a urination region to be in contact with a urination unit of the wearer, a buttocks region to be in contact with buttocks of the wearer, and an absorbent sheet which includes an absorbent polymer sandwiched between liquid-impermeable layers. The absorbent sheet is disposed in the buttocks region but not in the urination region.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: October 31, 2017
    Assignee: UNICHARM CORPORATION
    Inventors: Takaya Arayama, Hirotomo Mukai
  • Patent number: 9782305
    Abstract: An absorbent article is provided with a central elastic material for positioning in a state in which it is extended in the front/rear direction in the outer direction in relation to an absorbent body, and an elastic material cover sheet which abuts the outer direction side surface of the central elastic material. The elastic material cover sheet covers an extension region where the central elastic material is positioned in an extended state, and a non-extension region where the central elastic material is positioned in a non-extended state. An adhesive agent for fixing in the extended state is coated onto the central elastic material of the extension region. An adhesive agent is coated onto at least the non-extension region of the outer direction side surface of the elastic material cover sheet, and the adhesive agent coated onto the outer direction side surface penetrates to the inner direction side surface of the elastic material cover sheet.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: October 10, 2017
    Assignee: UNICHARM CORPORATION
    Inventors: Hirotomo Mukai, Kenji Takeuchi, Takaya Arayama
  • Publication number: 20170266063
    Abstract: An absorbent article is provided with a central elastic material for positioning in a state in which it is extended in the front/rear direction in the outer direction in relation to an absorbent body, and an elastic material cover sheet which abuts the outer direction side surface of the central elastic material. The elastic material cover sheet covers an extension region where the central elastic material is positioned in an extended state, and a non-extension region where the central elastic material is positioned in a non-extended state. An adhesive agent for fixing in the extended state is coated onto the central elastic material of the extension region. An adhesive agent is coated onto at least the non-extension region of the outer direction side surface of the elastic material cover sheet, and the adhesive agent coated onto the outer direction side surface penetrates to the inner direction side surface of the elastic material cover sheet.
    Type: Application
    Filed: June 6, 2017
    Publication date: September 21, 2017
    Inventors: Hirotomo MUKAI, Kenji TAKEUCHI, Takaya ARAYAMA
  • Patent number: 9668925
    Abstract: A disposable diaper having: an absorbent main body having an absorber; and an exterior body including an exterior body sheet which is disposed in an outward direction than the absorbent main body. On a face of an outer direction's side of the disposable diaper, an opening unit into which a finger can be inserted is formed. The exterior body has an overlap region which overlaps with an absorber, and the opening unit is provided in the overlap region.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: June 6, 2017
    Assignee: Unicharm Corporation
    Inventors: Hirotomo Mukai, Takeshi Shimazu
  • Publication number: 20170087028
    Abstract: A method of manufacturing a pants-type diaper comprises: a step (A) of conveying a first continuous sheet; a step (B) of laminating a plurality of continuous elastic bodies on an inner side of the first continuous sheet, laminating a second continuous sheet, and bonding at least a part of the continuous elastic bodies and the second continuous sheet; a step (C) of cutting a part of continuous elastic bodies from an outer side of the second continuous sheet or an outer side of the first continuous sheet; and a step (D) of disposing the absorbent body so as to arrange the absorber in a predetermined region. In the step (C), a part of the continuous elastic bodies that is not bonded to the first continuous sheet is cut in a region for forming the pants-type diaper, the region other than a predetermined region for arranging the absorber.
    Type: Application
    Filed: September 21, 2016
    Publication date: March 30, 2017
    Inventors: Hirotomo MUKAI, Akihide NINOMIYA, Akihisa SHIOMI
  • Patent number: 9561138
    Abstract: In the disclosed absorbent article, in a first region, a first elastic member extends linearly in the widthwise direction, in a second region, a second elastic member extends linearly in the widthwise direction, the elongational stress of the first elastic member is greater than the elongational stress of the second elastic member, and the length in the widthwise direction of the joining region that is of both the main body of an absorbent body and a chassis in the first region is configured in a manner so as to be shorter than the length in the widthwise direction of the joining region that is of both the main body of the absorbent body and the chassis in the second region.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: February 7, 2017
    Assignee: UNICHARM CORPORATION
    Inventors: Hirotomo Mukai, Yoshihisa Watabe