Patents by Inventor Rumiko Yamada

Rumiko Yamada 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: 10760636
    Abstract: A second dynamic vibration absorber is higher in resonance frequency than a first dynamic vibration absorber. At least one of the resonance frequency of the first dynamic vibration absorber or the resonance frequency of the second dynamic vibration absorber is shifted from associated at least one of the first resonance frequency or the second resonance frequency such that a peak frequency of antiresonance occurring in a higher frequency region of the first dynamic vibration absorber than the resonance frequency of the first dynamic vibration absorber is substantially different from that of antiresonance occurring in a lower frequency region of the second dynamic vibration absorber than the resonance frequency of the second dynamic vibration absorber.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: September 1, 2020
    Assignee: Mazda Motor Corporation
    Inventors: Kiyonori Nagato, Takuya Kikuchi, Tsunehiro Mori, Koichi Hirata, Akira Sumitani, Rumiko Yamada, Toru Morishima, Rei Enokizono, Yuichi Shirasuna
  • Patent number: 10612615
    Abstract: A second dynamic vibration absorber is higher in resonance frequency than a first dynamic vibration absorber. At least one of a ratio of a mass of a body of the first dynamic vibration absorber to a reciprocating inertial mass of the reciprocative rotation mechanism or a ratio of a mass of a body of the second dynamic vibration absorber to the reciprocating inertial mass of the reciprocative rotation mechanism is set such that a peak frequency of antiresonance occurring in a higher frequency region of the first dynamic vibration absorber than the resonance frequency of the first dynamic vibration absorber is substantially different from that of antiresonance occurring in a lower frequency region of the second dynamic vibration absorber than the resonance frequency of the second dynamic vibration absorber.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: April 7, 2020
    Assignee: Mazda Motor Corporation
    Inventors: Kiyonori Nagato, Toru Morishima, Takuya Kikuchi, Tsunehiro Mori, Rei Enokizono, Yuichi Shirasuna, Koichi Hirata, Akira Sumitani, Rumiko Yamada
  • Publication number: 20190120318
    Abstract: A second dynamic vibration absorber is higher in resonance frequency than a first dynamic vibration absorber. At least one of a ratio of a mass of a body of the first dynamic vibration absorber to a reciprocating inertial mass of the reciprocative rotation mechanism or a ratio of a mass of a body of the second dynamic vibration absorber to the reciprocating inertial mass of the reciprocative rotation mechanism is set such that a peak frequency of antiresonance occurring in a higher frequency region of the first dynamic vibration absorber than the resonance frequency of the first dynamic vibration absorber is substantially different from that of antiresonance occurring in a lower frequency region of the second dynamic vibration absorber than the resonance frequency of the second dynamic vibration absorber.
    Type: Application
    Filed: October 19, 2018
    Publication date: April 25, 2019
    Inventors: Kiyonori Nagato, Toru Morishima, Takuya Kikuchi, Tsunehiro Mori, Rei Enokizono, Yuichi Shirasuna, Koichi Hirata, Akira Sumitani, Rumiko Yamada
  • Publication number: 20190120317
    Abstract: A second dynamic vibration absorber is higher in resonance frequency than a first dynamic vibration absorber. At least one of the resonance frequency of the first dynamic vibration absorber or the resonance frequency of the second dynamic vibration absorber is shifted from associated at least one of the first resonance frequency or the second resonance frequency such that a peak frequency of antiresonance occurring in a higher frequency region of the first dynamic vibration absorber than the resonance frequency of the first dynamic vibration absorber is substantially different from that of antiresonance occurring in a lower frequency region of the second dynamic vibration absorber than the resonance frequency of the second dynamic vibration absorber.
    Type: Application
    Filed: October 19, 2018
    Publication date: April 25, 2019
    Inventors: Kiyonori Nagato, Takuya Kikuchi, Tsunehiro Mori, Koichi Hirata, Akira Sumitani, Rumiko Yamada, Toru Morishima, Rei Enokizono, Yuichi Shirasuna
  • Patent number: 8906279
    Abstract: A process for producing a cellulose-ester-resin-containing protective film for polarizers through film formation by melt casting. The protective film diminishes long-period optical unevenness and suffers no unevenness even after long-term storage. Also provided are a protective film for polarizers, a polarizer employing the film, and a liquid-crystal display. The process for producing a protective film for polarizers is a process for producing by the melt casting method a polarizer-protective film containing a cellulose ester resin.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: December 9, 2014
    Assignee: Konica Minolta Opto, Inc.
    Inventors: Kenzo Kasahara, Koichi Saito, Rumiko Yamada
  • Patent number: 8158218
    Abstract: Provided is a method for producing an optical film which suffers neither flatness deterioration nor film breakage and is free from problems concerning undulating undulation and partial light leakage. The process for optical film production comprises laminating a cellulose ester resin layer (A) to an acrylic resin layer (B) by coextrusion. The process is characterized in that the cellulose ester resin layer (A) contains 55 to 99 mass % cellulose ester resin and the acrylic resin layer (B) contains 55 to 99 mass % acrylic resin, that the web is conveyed while keeping the layer (A) and the layer (B) in contact with the surface of a first cooling roll and the surface of a second cooling roll, respectively, and that when the surface temperature of the first cooling roll and the surface temperature of the second cooling roll are expressed by Ta (° C.) and Tb (° C.), respectively, then the Ta (° C.) and Tb (° C.) satisfy the following relationship (1). (Ta?80)° C.<Tb(° C.)<(Ta?5)° C.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: April 17, 2012
    Assignee: Konica Minolta Opto, Inc.
    Inventors: Rumiko Yamada, Atsuko Matsuda
  • Publication number: 20110128478
    Abstract: Provided is a polarizing plate which is free from occurrence of cloudy unevenness appearing blurry on a screen of a liquid crystal display under heat and humidity conditions.
    Type: Application
    Filed: June 8, 2009
    Publication date: June 2, 2011
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventor: Rumiko Yamada
  • Publication number: 20110033640
    Abstract: Provided is a method for producing an optical film which suffers neither flatness deterioration nor film breakage and is free from problems concerning undulating undulation and partial light leakage. The process for optical film production comprises laminating a cellulose ester resin layer (A) to an acrylic resin layer (B) by coextrusion. The process is characterized in that the cellulose ester resin layer (A) contains 55 to 99 mass % cellulose ester resin and the acrylic resin layer (B) contains 55 to 99 mass % acrylic resin, that the web is conveyed while keeping the layer (A) and the layer (B) in contact with the surface of a first cooling roll and the surface of a second cooling roll, respectively, and that when the surface temperature of the first cooling roll and the surface temperature of the second cooling roll are expressed by Ta (° C.) and Tb (° C.), respectively, then the Ta (° C.) and Tb (° C.) satisfy the following relationship (1). (Ta?80)° C.<Tb (° C.)<(Ta?5)° C.
    Type: Application
    Filed: April 24, 2009
    Publication date: February 10, 2011
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Rumiko Yamada, Atsuko Matsuda
  • Patent number: 7854971
    Abstract: A cellulose ester film comprising a cellulose ester and a compound containing: an acrylate group or a methacrylate group; and a phenolic hydroxyl group, in the molecule.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: December 21, 2010
    Assignee: Konica Minolta Opto, Inc.
    Inventors: Kenzo Kasahara, Satomi Kawabe, Koichi Saito, Kazuaki Nakamura, Rumiko Yamada
  • Publication number: 20100236713
    Abstract: A film for a display comprising a cellulose ester and a compound represented by Formula (I) or (Ia).
    Type: Application
    Filed: March 5, 2010
    Publication date: September 23, 2010
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Satomi Kawabe, Koichi Saito, Takatugu Suzuki, Kazuaki Nakamura, Kenzo Kasahara, Rumiko Yamada, Issei Nakahara
  • Publication number: 20100239787
    Abstract: A process for producing a cellulose-ester-resin-containing protective film for polarizers through film formation by melt casting. The protective film diminishes long-period optical unevenness and suffers no unevenness even after long-term storage. Also provided are a protective film for polarizers, a polarizer employing the film, and a liquid-crystal display. The process for producing a protective film for polarizers is a process for producing by the melt casting method a polarizer-protective film containing a cellulose ester resin.
    Type: Application
    Filed: May 21, 2007
    Publication date: September 23, 2010
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Kenzo Kasahara, Koichi Saito, Rumiko Yamada
  • Publication number: 20090251643
    Abstract: A polarizing plate arranged on at least one surface of a liquid crystal cell for use in a liquid crystal display apparatus, comprising a first polarizing plate protective film, a polarizing film, and a second polarizing plate protective film, the first polarizing plate protective film being arranged on the liquid crystal cell side with respect to a polarizing film, and the second polarizing plate protective film being arranged on the side opposite to the liquid crystal cell intervening the polarizing film, wherein the first polarizing plate protective film contains a cellulose ester and a hindered phenol compound in an amount of 0.01 to 5.0 weight % based on the total weight of the cellulose ester.
    Type: Application
    Filed: November 9, 2006
    Publication date: October 8, 2009
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Rumiko Yamada, Toshiaki Shibue, Nobuo Kubo
  • Publication number: 20090246416
    Abstract: In the present invention, provided is an optical film exhibiting less generation of horseback failure, winding core transfer and wrinkles on a film when starting winding, and also provided is a manufacturing method thereof, further together with a polarizing plate and a liquid crystal display device exhibiting high contrast. Also disclosed is an optical film possessing a cellulose ester and a UV absorbent represented by the following Formula (1): wherein R1 represents R2 represents a methyl group, a t-butyl group, a t-amyl group or a t-octyl group; R3 represents a substituent; each of R4 and R5 represents a hydrogen atom or a substituent; m is an integer of 0-3; and n is an integer of 0-4.
    Type: Application
    Filed: July 5, 2007
    Publication date: October 1, 2009
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Satomi Kawabe, Koichi Saito, Rumiko Yamada
  • Publication number: 20090169772
    Abstract: Disclosed are a retardation film, a method for producing the retardation film, a polarizing plate comprising the retardation film, and a liquid crystal display comprising the polarizing plate. Specifically disclosed is a method for producing a retardation film, which comprises an extrusion step for extruding a composition containing a thermoplastic resin and having a temperature of To [° C.] from a die; a cooling step for cooling a film extruded from the die and having a glass transition temperature of Tg [° C.] to a temperature Ta [° C.]; a heating step for heating the cooled film to a temperature Tb [° C.] at least once; and a stretching step for cooling the heated film to a temperature Tc [° C.] and then stretching the cooled film in the width direction.
    Type: Application
    Filed: November 22, 2006
    Publication date: July 2, 2009
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Rumiko Yamada, Toshiaki Shibue, Nobuo Kubo
  • Publication number: 20080118667
    Abstract: A cellulose ester film comprising a cellulose ester and a compound containing an acrylate group or a methacrylate group; and a phenolic hydroxyl group, in the molecule.
    Type: Application
    Filed: June 4, 2007
    Publication date: May 22, 2008
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Kenzo KASAHARA, Satomi KAWABE, Koichi SAITO, Kazuaki NAKAMURA, Rumiko YAMADA
  • Publication number: 20080043176
    Abstract: A method of manufacturing a polarizing plate protective film, comprising: preparing a mixture containing a cellulose ester, a phenyl benzoate ester compound, a phenol compound and a compound represented by Formula (L); heating and melting the mixture; and casting the melted mixture on a support to form the polarizing plate protective film on the support.
    Type: Application
    Filed: June 28, 2007
    Publication date: February 21, 2008
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Rumiko YAMADA, Koichi SAITO, Kenzo KASAHARA
  • Publication number: 20080013173
    Abstract: A polarizing plate protective film manufacturing method, comprises: preparing a mixture containing a cellulose ester, a triazine ring compound, a phenol compound and a compound represented by Formula (L); heating and melting the mixture; and casting the melted mixture to form a film.
    Type: Application
    Filed: July 3, 2007
    Publication date: January 17, 2008
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Rumiko YAMADA, Koichi SAITO, Kenzo KASAHARA
  • Publication number: 20070227652
    Abstract: A film for a display comprising a cellulose ester and a compound represented by Formula (I) or (Ia).
    Type: Application
    Filed: March 20, 2007
    Publication date: October 4, 2007
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Satomi KAWABE, Koichi SAITO, Takatugu SUZUKI, Kazuaki NAKAMURA, Kenzo KASAHARA, Rumiko YAMADA, Issei NAKAHARA