Patents by Inventor Tsutomu Kido

Tsutomu Kido 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: 5665083
    Abstract: An absorbent member comprises an absorbent core, a liquid permeable covering sheet and a reticulated sheet interposed between the absorbent core and the covering sheet 11, wherein the reticulated sheet has a relatively higher open ratio over at least an inwardly facing surface of the absorbent core than over any of oppsite side regions and opposite end regions thereof.
    Type: Grant
    Filed: April 12, 1996
    Date of Patent: September 9, 1997
    Assignee: Uni-Charm Corporation
    Inventors: Takamitsu Igaue, Tsutomu Kido
  • Patent number: 5656232
    Abstract: A topsheet of body fluid absorptive articles comprising a first sheet made of thermoplastic synthetic resin sheet and having liquid passages each downwardly extending therethrough and a second sheet containing 70 to 100% by weight of cellulose fibres bonded to said first sheet around lower openings of the respective liquid passages and comprises mechanically intertwined fibres only. The second sheet has a density higher than a density of fibres contained in the liquid-absorbent core.
    Type: Grant
    Filed: June 19, 1995
    Date of Patent: August 12, 1997
    Assignee: Uni-Charm Corporation
    Inventors: Hisashi Takai, Tsutomu Kido
  • Patent number: 5628844
    Abstract: A topsheet for use in body fluid absorptive articles is so improved that collapse and clogging of liquid passages therein may be reliably avoided. The topsheet includes an upper sheet, provided with skin-contacting areas and liquid passages, and a lower sheet provided with skin-non-contacting areas, areas welded to the liquid passages, and exposed areas. The exposed areas are welded to each of the liquid passages around lower openings thereof so as to protect the liquid passage against collapse and clogging. The exposed areas define a skin-contacting surface which rises up into each of the liquid passages without extending above the upper surface of the skin-contacting areas. The upper sheet cooperates with the lower sheet to define cavities extending in the direction of the topsheet thickness.
    Type: Grant
    Filed: November 30, 1994
    Date of Patent: May 13, 1997
    Assignees: Mitsui Petrochemical Industries, Ltd., Uni-Charm Corporation
    Inventors: Kazunari Nishino, Shigeyuki Motomura, Shizuo Shimizu, Takamitsu Igaue, Tsutomu Kido, Hisashi Takai
  • Patent number: 5620712
    Abstract: A topsheet for use in body fluid absorptive articles is so improved that collapse and clogging of liquid passages therein may be reliably avoided. The topsheet includes an upper sheet, provided with skin-contacting areas and liquid passages, and a lower sheet provided with skin-non-contacting areas, areas welded to the liquid passages, and exposed areas. The exposed areas are welded to each of the liquid passages around lower openings thereof so as to protect the liquid passage against collapse and clogging. The exposed areas define a skin-contacting surface which rises up into each of the liquid passages without extending above the upper surface of the skin-contacting areas. The upper sheet cooperates with the lower sheet to define cavities extending in the direction of the topsheet thickness.
    Type: Grant
    Filed: November 30, 1994
    Date of Patent: April 15, 1997
    Assignees: Mitsui Petrochemical Industries, Ltd, Uni-Charm Corporation
    Inventors: Kazunari Nishino, Shigeyuki Motomura, Shizuo Shimizu, Takamitsu Igaue, Tsutomu Kido, Hisashi Takai
  • Patent number: 5554243
    Abstract: An absorbent member comprises an absorbent core, a liquid permeable covering sheet and a reticulated sheet interposed between the absorbent core and the covering sheet 11, wherein the reticulated sheet has a relatively higher open ratio over at least an inwardly facing surface of the absorbent core than over any of opposite side regions and opposite end regions thereof.
    Type: Grant
    Filed: June 20, 1995
    Date of Patent: September 10, 1996
    Assignee: Uni-Charm Corporation
    Inventors: Takamitsu Igaue, Tsutomu Kido
  • Patent number: 5522811
    Abstract: A topsheet for use in body fluid absorptive goods includes an upper sheet having a skin-contacting area and a plurality of liquid passages each having upper and lower openings. A lower sheet underlies the upper sheet. The lower sheet is welded to the upper sheet around the lower openings and extends into each of the liquid passages along a limited extent thereof.
    Type: Grant
    Filed: November 18, 1993
    Date of Patent: June 4, 1996
    Assignees: Uni-Charm Corporation, Mitsui Petrochemical Industries, Ltd.
    Inventors: Takamitsu Igaue, Tsutomu Kido, Hisashi Takai
  • Patent number: 5449352
    Abstract: A topsheet for use in body fluid absorptive articles is so improved that collapse and clogging of liquid passages therein may be reliably avoided. The topsheet includes an upper sheet, provided with skin-contacting areas and liquid passages, and a lower sheet provided with skin-non-contacting areas, areas welded to the liquid passages, and exposed areas. The exposed areas are welded to each of the liquid passages around lower openings thereof so as to protect the liquid passage against collapse and clogging. The exposed areas define a skin-contacting surface which rises up into each of the liquid passages without extending above the upper surface of the skin-contacting areas. The upper sheet cooperates with the lower sheet to define cavities extending in the direction of the topsheet thickness.
    Type: Grant
    Filed: March 21, 1994
    Date of Patent: September 12, 1995
    Assignees: Mitsui Petrochemical Industries, Ltd., Uni-Charm Corporation
    Inventors: Kazunari Nishino, Shigeyuki Motomura, Shizuo Shimizu, Takamitsu Igaue, Tsutomu Kido, Hisashi Takai
  • Patent number: 5383870
    Abstract: A topsheet for body fluid absorptive articles improved so that liquid passages formed in the topsheet may be stabilized during use of the goods and the topsheet may offer cloth-like feeling and appearance, the topsheet being composed of an upper sheet layer made from melt blown nonwoven fabric containing downwardly extending liquid passageways and an underlying fibrous layer 11 bonded thereto adjacent the lower openings of said liquid passageways, whereby the liquid passageways will not be collapsed and the lower openings of these passageways will not be distorted.
    Type: Grant
    Filed: September 2, 1993
    Date of Patent: January 24, 1995
    Assignees: Mitsui Petrochemical Industries, Ltd., Uni-Charm Corporation
    Inventors: Hisashi Takai, Tsutomu Kido
  • Patent number: 5275884
    Abstract: Bulky split fibers having bond strength are produced by preparing a composite synthetic resin film of three layer structure having a polypropylene layer formed of a polypropylene/polyethylene blend and a polyethylene layer on either surface of the polypropylene layer, slitting and stretching the composite film to thereby form stretched tapes, and causing splitting of the stretched tapes for fibrillation. An integral article is prepared from the resultant split fibers by mixing them alone or with plant fibers and then heating at a temperature between the melting points of polyethylene and polypropylene, thereby integrating together the split fibers with each other or with the plant fibers.
    Type: Grant
    Filed: September 3, 1992
    Date of Patent: January 4, 1994
    Assignees: Mitsui Petrochemical Industries, Ltd., Uni Charm Corporation
    Inventors: Kazunari Nishino, Shuzo Sasagawa, Hirofumi Katsurayama, Takamitsu Igaue, Tsutomu Kido
  • Patent number: 5188895
    Abstract: Bulky split fibers having bond strength are produced by preparing a composite synthetic resin film of three layer structure having a polypropylene layer formed of a polypropylene/polyethylene blend and a polyethylene layer on either surface of the polypropylene layer, slitting and stretching the composite film to thereby form stretched tapes, and causing splitting of the stretched tapes for fibrillation. An integral article is prepared from the resultant split fibers by mixing them alone or with plant fibers and then heating at a temperature between the melting points of polyethylene and polypropylene, thereby integrating together the split fibers with each other or with the plant fibers.
    Type: Grant
    Filed: August 29, 1990
    Date of Patent: February 23, 1993
    Assignees: Mitsui Petrochemical Industries, Ltd., Uni Charm Corporation
    Inventors: Kazunari Nishino, Shuzo Sasagawa, Hirofumi Katsurayama, Takamitsu Igaue, Tsutomu Kido