Patents by Inventor Iwao Miyashita

Iwao Miyashita 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: 4835042
    Abstract: An absorbent member, suitable for a tampon, is produced by ejecting a liquid against a sheet of water-absorptive fibers in order to interlace the fibers with each other and molding under a pressure the sheet to form the absorbent member.
    Type: Grant
    Filed: May 15, 1987
    Date of Patent: May 30, 1989
    Assignee: KAO Corporation
    Inventors: Masatake Dohzono, Iwao Miyashita, Norihiro Abe
  • Patent number: 4804378
    Abstract: An absorbing article comprises a surface layer to be in contact with skins containing from 60 to 100% by weight of first fibers having a hydrophilic surface and a hydrophobic inside and from 40 to 0% by weight of second fibers which are hydrophilic at least at their surface, and a rearface constituted at least with one or more layers containing from 0 to 50% by weight of said first fibers and from 100 to 50% by weight of said second fibers, in which the surface hydrophilic property, after being wetted, is higher in said second fibers than in said first fibers.
    Type: Grant
    Filed: April 24, 1987
    Date of Patent: February 14, 1989
    Assignee: KAO Corporation
    Inventors: Daisuke Shiba, Akira Sakurai, Iwao Miyashita
  • Patent number: 4794034
    Abstract: A sanitary, liquid-absorbing article has as surface material a non-woven fabric comprising two layers integrated by a binder, the first layer having a basis weight of 5 to 15 g/m.sup.2, the second layer having a basis weight of 20 to 45 g/m.sup.2, wherein when the non-woven fabric is in the wet state, E=K.rho..sub.F.sup.a ; .rho..sub.FO .ltoreq.1.2.times.10.sup.-2 g/cm.sup.3 ; and K.gtoreq.1.2.times.10.sup.6 as defined in the following compression characteristic formula of the non-woven fabric: ##EQU1## wherein E is a Young's modulus (g/cm.sup.2), P is a pressure (g/cm.sup.2), .rho..sub.F is an apparent specific weight (g/cm.sup.3) and .rho..sub.FO is a .rho..sub.F value when the pressure is 0 g/cm.sup.2.
    Type: Grant
    Filed: May 3, 1982
    Date of Patent: December 27, 1988
    Assignee: Kao Soap Co., Ltd.
    Inventors: Kazunori Nishizawa, Osamu Ito, Iwao Miyashita
  • Patent number: 4714466
    Abstract: An absorbent member, suitable for a tampon, is produced by ejecting a liquid against a sheet of water-absorptive fibers in order to interlace the fibers with each other and moulding under a pressure the sheet to form the absorbent member.
    Type: Grant
    Filed: January 7, 1986
    Date of Patent: December 22, 1987
    Assignee: Kao Corporation
    Inventors: Masatake Dohzono, Iwao Miyashita, Norihiro Abe
  • Patent number: 4652484
    Abstract: An absorbent article such as a sanitary napkin and a diaper is improved in the surface material by use of a non-woven fabric of hot-melt fibers which melts at 90.degree. to 140.degree. C. It is disposable.
    Type: Grant
    Filed: July 18, 1985
    Date of Patent: March 24, 1987
    Assignee: Kao Corporation
    Inventors: Daisuke Shiba, Iwao Miyashita, Osamu Ito