Patents by Inventor Katsuhiro Uematsu
Katsuhiro Uematsu 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).
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Patent number: 9492331Abstract: To provide an absorbent article that can further reduce leakage of body fluid from an end portion in a longitudinal direction. An elongated shaped absorbent article includes: a top sheet that has a skin contacting surface; a back sheet; and an absorbent core that is disposed between the top sheet and the back sheet, in which a compressed groove is formed on the skin contacting surface; the skin contacting surface has an excretory contact region, a front region, and a rear region; the compressed groove has a pair of first central grooves and a first circular groove that is provided in at least any one of the front region and the rear region; and the first circular groove is arranged at a position overlapping a vertical center line.Type: GrantFiled: August 30, 2011Date of Patent: November 15, 2016Assignee: UNICHARM CORPORATIONInventors: Katsuhiro Uematsu, Quing Cao, Yukihiro Ito, Hiroyuki Harada, Kazuya Nishitani
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Patent number: 9315931Abstract: A sheet of nonwoven fabric which has surface irregularities, the shape of the surface irregularities being less apt to be changed by external pressure, etc. The sheet has a machine, cross and thickness directions which are perpendicular to one another. The upper surface has a plurality of protrusions continuously extending, in parallel, in the cross direction and further has a plurality of recesses that are located between the adjacent protrusions and extend in the cross direction. The sheet includes first and second fibrous layers located on the upper-surface side and the lower-surface side, respectively. The first fibrous layer comprises heat-fusible fibers, and the second fibrous layer comprises coil-shaped three-dimensional crimp fibers that are oriented mainly in the machine direction and form a network by entanglement thereof without having been fused at the sites where the crimp fibers cross one another.Type: GrantFiled: February 28, 2014Date of Patent: April 19, 2016Assignee: Unicharm CorporationInventors: Katsuhiro Uematsu, Toru Oba, Satoshi Mizutani
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Patent number: 9095477Abstract: A nonwoven sheet for use in absorbent articles such as disposable diapers which is capable of reducing the range of surface diffusion of, and reducing re-adhesion to the skin of, highly viscous fluid excretion. The nonwoven sheet has mutually perpendicular longitudinal, transverse and thickness directions, and has in the aforementioned thickness direction a front surface and a back surface opposite thereof. Ridges and grooves are formed alternately so as to extend in parallel in the aforementioned longitudinal direction and so as to form repeated undulations in the aforementioned transverse direction. The nonwoven sheet has a bottom surface which, when the aforementioned nonwoven sheet is placed on a horizontal surface with the back surface (opposite of the front surface in contact with the skin of the wearer) down, is the surface that contacts the aforementioned horizontal surface.Type: GrantFiled: June 21, 2011Date of Patent: August 4, 2015Assignee: Unicharm CorporationInventors: Masashi Yamaguchi, Toru Oba, Akihiro Kimura, Katsuhiro Uematsu
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Publication number: 20140174628Abstract: A sheet of nonwoven fabric which has surface irregularities, the shape of the surface irregularities being less apt to be changed by external pressure, etc. The sheet has a machine, cross and thickness directions which are perpendicular to one another. The upper surface has a plurality of protrusions continuously extending, in parallel, in the cross direction and further has a plurality of recesses that are located between the adjacent protrusions and extend in the cross direction. The sheet includes first and second fibrous layers located on the upper-surface side and the lower-surface side, respectively. The first fibrous layer comprises heat-fusible fibers, and the second fibrous layer comprises coil-shaped three-dimensional crimp fibers that are oriented mainly in the machine direction and form a network by entanglement thereof without having been fused at the sites where the crimp fibers cross one another.Type: ApplicationFiled: February 28, 2014Publication date: June 26, 2014Inventors: Katsuhiro Uematsu, Toru Oba, Satoshi Mizutani
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Publication number: 20130267926Abstract: To provide an absorbent article that can further reduce leakage of body fluid from an end portion in a longitudinal direction. An elongated shaped absorbent article includes: a top sheet that has a skin contacting surface; a back sheet; and an absorbent core that is disposed between the top sheet and the back sheet, in which a compressed groove is formed on the skin contacting surface; the skin contacting surface has an excretory contact region, a front region, and a rear region; the compressed groove has a pair of first central grooves and a first circular groove that is provided in at least any one of the front region and the rear region; and the first circular groove is arranged at a position overlapping a vertical center line.Type: ApplicationFiled: August 30, 2011Publication date: October 10, 2013Applicant: UNI-CHARM CORPORATIONInventors: Katsuhiro Uematsu, Quing Cao, Yukihiro Ito, Hiroyuki Harada, Kazuya Nishitani
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Publication number: 20130158497Abstract: A nonwoven sheet for use in absorbent articles such as disposable diapers which is capable of reducing the range of surface diffusion of, and reducing re-adhesion to the skin of, highly viscous fluid excretion. The nonwoven sheet has mutually perpendicular longitudinal, transverse and thickness directions, and has in the aforementioned thickness direction a front surface and a back surface opposite thereof. Ridges and grooves are formed alternately so as to extend in parallel in the aforementioned longitudinal direction and so as to form repeated undulations in the aforementioned transverse direction. The nonwoven sheet has a bottom surface which, when the aforementioned nonwoven sheet is placed on a horizontal surface with the back surface (opposite of the front surface in contact with the skin of the wearer) down, is the surface that contacts the aforementioned horizontal surface.Type: ApplicationFiled: June 21, 2011Publication date: June 20, 2013Applicant: UNICHARM CORPORATIONInventors: Masashi Yamaguchi, Toru Oba, Akihiro Kimura, Katsuhiro Uematsu
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Publication number: 20130022784Abstract: A sheet of nonwoven fabric which has surface irregularities, the shape of the surface irregularities being less apt to be changed by external pressure, etc. The sheet has a machine, cross and thickness which are perpendicular to one another. The upper surface has a plurality of protrusions continuously extending, in parallel, in the cross direction and further has a plurality of recesses (3) that are located between the adjacent protrusions and extend in the cross direction. The sheet includes first and second fibrous layers located on the upper-surface side and the lower-surface side, respectively. The first fibrous layer comprises heat-fusible fibers, and the second fibrous layer comprises coil-shaped three-dimensional crimp fibers that are oriented mainly in the machine direction and form a network by entanglement thereof without having been fused at the sites where the crimp fibers cross one another.Type: ApplicationFiled: March 22, 2011Publication date: January 24, 2013Applicant: UNICHARM CORPORATIONInventors: Katsuhiro Uematsu, Toru Oba, Satoshi Mizutani
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Publication number: 20120321839Abstract: A nonwoven-fabric sheet having a high liquid permeation rate and a process for producing the sheet. The nonwoven-fabric sheet comprises two layers, a first layer and a second layer, and is characterized in that the first layer has a plurality of ridges and grooves which extend in parallel in the lengthwise direction, that the first layer comprises heat-fusible fibers and the second layer comprises crimped fibers, and that the sheet has an average fiber angle of 70 or less in a cross-section parallel to the lengthwise direction.Type: ApplicationFiled: February 18, 2011Publication date: December 20, 2012Applicant: UNICHARM CORPORATIONInventors: Katsuhiro Uematsu, Toru Oba, Satoshi Mizutani
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Patent number: 8273941Abstract: The invention provides a nonwoven fabric having good fluid drawing properties, in which fluid hardly remains, a method for producing a nonwoven fabric, and an absorbent article. The nonwoven fabric has a thickness direction and a planar direction perpendicular to the thickness direction, and includes a high density region having a higher fiber density than an average fiber density. The high density region penetrates from one side to another side in the thickness direction.Type: GrantFiled: April 14, 2008Date of Patent: September 25, 2012Assignee: Uni-Charm CorporationInventors: Katsuhiro Uematsu, Hideyuki Ishikawa, Kouichirou Tani
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Publication number: 20120177889Abstract: Provided is a liquid-permeable nonwoven fabric having improved in air permeability in the thickness direction thereof, formed on its surface with ridges and troughs extending in parallel to each other in one direction. A nonwoven fabric formed of thermoplastic synthetic short fibers fused together is formed on its upper surface with ridges and troughs extending in parallel to each other in a longitudinal direction. In a cross section of each ridge taken in the transverse direction, the ridge includes opposite lateral regions in which the short fibers are densely distributed and a central region defined between the opposite lateral regions and in which the short fibers are sparsely distributed. The short fibers in the central region include short fibers in a crest of the ridge adapted to connect the opposite lateral regions to each other. This invention also discloses a method for manufacturing of the nonwoven fabric.Type: ApplicationFiled: August 16, 2010Publication date: July 12, 2012Applicant: UNICHARM CORPORATIONInventors: Katsuhiro Uematsu, Hiroki Goda, Satoshi Mizutani
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Patent number: 7867348Abstract: The present invention aims at providing a non-woven fabric having high-density regions and low-density regions dispersed horizontally, so as not to prevent liquid transfer from a surface sheet to an absorbent body and not to diffuse a liquid less during transfer, a manufacturing method thereof, and a disposable diaper made therefrom. The non-woven fabric 5 includes a plurality of high-density regions 11 and a plurality of low-density regions 12 dispersedly formed in a planar direction thereof. The high-density regions 11 are formed dominantly on at least one side of the non-woven fabric 5, and the low-density regions 12 are formed communicating both sides thereof.Type: GrantFiled: December 5, 2007Date of Patent: January 11, 2011Assignee: Uni-Charm CorporationInventors: Katsuhiro Uematsu, Hideyuki Ishikawa, Koichiro Tani
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Publication number: 20100137824Abstract: The invention provides a nonwoven fabric having good fluid drawing properties, in which fluid hardly remains, a method for producing a nonwoven fabric, and an absorbent article. The nonwoven fabric has a thickness direction and a planar direction perpendicular to the thickness direction, and includes a high density region having a higher fiber density than an average fiber density. The high density region penetrates from one side to another side in the thickness direction.Type: ApplicationFiled: April 14, 2008Publication date: June 3, 2010Inventors: Katsuhiro Uematsu, Hideyuki Ishikawa, Kouichirou Tani
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Publication number: 20080132136Abstract: The present invention aims at providing a non-woven fabric having high-density regions and low-density regions dispersed horizontally, so as not to prevent liquid transfer from a surface sheet to an absorbent body and not to diffuse a liquid less during transfer, a manufacturing method thereof, and a disposable diaper made therefrom. The non-woven fabric 5 includes a plurality of high-density regions 11 and a plurality of low-density regions 12 dispersedly formed in a planar direction thereof. The high-density regions 11 are formed dominantly on at least one side of the non-woven fabric 5, and the low-density regions 12 are formed communicating both sides thereof.Type: ApplicationFiled: December 5, 2007Publication date: June 5, 2008Applicant: Uni-Charm CorporationInventors: Katsuhiro Uematsu, Hideyuki Ishikawa, Koichiro Tani