Patents by Inventor Emi Takahashi

Emi Takahashi 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).

  • Publication number: 20140370427
    Abstract: An electrostatic charge image developing toner includes toner particles and silica particles, wherein the silica particles have an average equivalent circle diameter of from 70 nm to 400 nm, an average circularity of from 0.5 to 0.9, and a pore volume of from 0.05 cm3/g to 2.5 cm3/g.
    Type: Application
    Filed: October 28, 2013
    Publication date: December 18, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Koji SASAKI, Satoshi INOUE, Yutaka SAITO, Yasuaki HASHIMOTO, Emi TAKAHASHI
  • Patent number: 8685602
    Abstract: There is provided a toner for electrophotography containing at least a binder resin, a colorant and a barium compound, and having a relaxation modulus G(t) of from about 2.0×102 Pa to about 3.0×103 Pa in a relaxation time of t=10×Dt (wherein Dt is the heating time taken during fixing) as determined by the measurement of dynamic viscoelasticity, and a barium content of from about 0.1% to about 0.5% with respect to the total amount of constituent atoms in the toner as determined by X-ray fluorescence.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: April 1, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yuka Ishihara, Emi Takahashi, Masahiro Okita
  • Publication number: 20120251935
    Abstract: There is provided a toner for electrophotography containing at least a binder resin, a colorant and a barium compound, and having a relaxation modulus G(t) of from about 2.0×102 Pa to about 3.0×103 Pa in a relaxation time of t=10×Dt (wherein Dt is the heating time taken during fixing) as determined by the measurement of dynamic viscoelasticity, and a barium content of from about 0.1% to about 0.5% with respect to the total amount of constituent atoms in the toner as determined by X-ray fluorescence.
    Type: Application
    Filed: August 16, 2011
    Publication date: October 4, 2012
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yuka ISHIHARA, Emi TAKAHASHI, Masahiro OKITA
  • Patent number: 8121301
    Abstract: An earpiece, an electronic device, and a communication device, capable of reducing the influence of leakage of sounds from a clearance between the earpiece and an ear not to need an addition of parts are provided. An earpiece (100) includes an electromechanical acoustic transducer (10) having a diaphragm and for generating a sound by vibrating the diaphragm in response to an electric signal, a case (11) on which a sound hole (12) is provided and in which the electromechanical acoustic transducer (10) is housed, and a holding member (13) for holding the electromechanical acoustic transducer (10) in the case (11). The electromechanical acoustic transducer (10) has a sound pressure-frequency characteristic that is compensated in advance such that the sound pressure-frequency characteristic is planarized in a condition that the generated sound is leaked from a user's ear (14) being covered with the case (11).
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: February 21, 2012
    Assignee: Panasonic Corporation
    Inventors: Shinya Suzuki, Emi Takahashi, Yukinari Inoue
  • Patent number: 7820349
    Abstract: The invention provides a toner for electrostatic latent image development comprising a first component and a second component which are isolated from each other and capable of forming a color when the first component and the second component are brought into reaction with each other, and a photo-curable composition containing either the first component or the second component, the photo-curable composition not being capable of forming a color when the photo-curable composition is not cured, that is irreversibly controlled to a state of being capable of forming a color by irradiating light having a specific wavelength at which the photo-curable composition is cured.
    Type: Grant
    Filed: August 16, 2006
    Date of Patent: October 26, 2010
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Seiichi Takagi, Takashi Imai, Susumu Yoshino, Katsumi Daimon, Emi Takahashi, Toyofumi Inoue, Yasushige Nakamura, Isao Ito
  • Publication number: 20080279411
    Abstract: An earpiece, an electronic device, and a communication device, capable of reducing the influence of leakage of sounds from a clearance between the earpiece and an ear not to need an addition of parts are provided. An earpiece (100) includes an electromechanical acoustic transducer (10) having a diaphragm and for generating a sound by vibrating the diaphragm in response to an electric signal, a case (11) on which a sound hole (12) is provided and in which the electromechanical acoustic transducer (10) is housed, and a holding member (13) for holding the electromechanical acoustic transducer (10) in the case (11). The electromechanical acoustic transducer (10) has a sound pressure-frequency characteristic that is compensated in advance such that the sound pressure-frequency characteristic is planarized in a condition that the generated sound is leaked from a user's ear (14) being covered with the case (11).
    Type: Application
    Filed: March 31, 2006
    Publication date: November 13, 2008
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shinya Suzuki, Emi Takahashi, Yukinari Inoue
  • Patent number: 7348119
    Abstract: The present invention provides a toner for developing an electrostatic latent image including: toner mother particles containing a binder resin and a colorant; and manganese compound particles having a ?-type crystalline structure, the production method thereof, and a developer containing the toner.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: March 25, 2008
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Tetsu Torigoe, Noriyoshi Takahashi, Teruo Sakai, legal representative, Emi Takahashi, Teigen Ri, Sueko Sakai
  • Publication number: 20070207402
    Abstract: The invention provides a toner for electrostatic latent image development comprising a first component and a second component which are isolated from each other and capable of forming a color when the first component and the second component are brought into reaction with each other, and a photo-curable composition containing either the first component or the second component, the photo-curable composition not being capable of forming a color when the photo-curable composition is not cured, that is irreversibly controlled to a state of being capable of forming a color by irradiating light having a specific wavelength at which the photo-curable composition is cured.
    Type: Application
    Filed: August 16, 2006
    Publication date: September 6, 2007
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Seiichi Takagi, Takashi Imai, Susumu Yoshino, Katsumi Daimon, Emi Takahashi, Toyofumi Inoue, Yasushige Nakamura, Isao Ito
  • Publication number: 20060210901
    Abstract: The present invention provides a toner for developing an electrostatic latent image including: toner mother particles containing a binder resin and a colorant; and manganese compound particles having a ?-type crystalline structure, the production method thereof, and a developer containing the toner.
    Type: Application
    Filed: June 28, 2005
    Publication date: September 21, 2006
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Tetsu Torigoe, Noriyoshi Takahashi, Sueko Sakai, Teruo Sakai, Emi Takahashi, Teigen Ri
  • Publication number: 20060115757
    Abstract: A toner for development of an electrostatic latent image, comprises: a binder resin; a colorant; and a release agent, wherein the binder resin has a weight average molecular weight of 20,000 to 40,000, and when a carbon content and a sulfur content of the toner measured using X-ray fluorescence are represented by [C] % and [S] %, respectively, [S]/[C] satisfies expression (1): 0.0002?[S]/[C]?0.0030 ??(1).
    Type: Application
    Filed: May 26, 2005
    Publication date: June 1, 2006
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Emi Takahashi, Noriyoshi Takahashi, Sueko Sakai, Teruo Sakai, Tetsu Torigoe, Teigen Ri
  • Patent number: 7033719
    Abstract: The present invention provides a toner, comprising a binder resin and a colorant, and having a plurality of absorption peaks in a wave number range of 400 to 4,000 cm?1 in an infrared absorption spectrum, wherein among the plurality of absorption peaks, a maximum absorption peak appears at wave number ranging from 500 to 800 cm?1 and, given that the intensity of the maximum absorption peak is P1 and that the intensity of a second greatest absorption peak is P2, P1 and P2 satisfy the following equation (1), a developer comprising this toner, an image forming method using this toner, and an image forming apparatus using this toner. 1.6?P1/P2?6.
    Type: Grant
    Filed: July 28, 2003
    Date of Patent: April 25, 2006
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Manabu Serizawa, Kazuhiko Yanagida, Hidekazu Yaguchi, Takahisa Fujii, Emi Takahashi, Yasuo Matsumura
  • Publication number: 20040152004
    Abstract: The present invention provides a toner, comprising a binder resin and a colorant, and having a plurality of absorption peaks in a wave number range of 400 to 4,000 cm−1 in an infrared absorption spectrum, wherein among the plurality of absorption peaks, a maximum absorption peak appears at wave number ranging from 500 to 800 cm−1 and, given that the intensity of the maximum absorption peak is P1 and that the intensity of a second greatest absorption peak is P2, P1 and P2 satisfy the following equation (1), a developer comprising this toner, an image forming method using this toner, and an image forming apparatus using this toner.
    Type: Application
    Filed: July 28, 2003
    Publication date: August 5, 2004
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Manabu Serizawa, Kazuhiko Yanagida, Hidekazu Yaguchi, Takahisa Fujii, Emi Takahashi, Yasuo Matsumura
  • Patent number: 6770317
    Abstract: Whipped cream of the present invention contains substantially no spherical fat particles having a particle diameter of 1 &mgr;m or greater, or contains 10% or more of spherical fat particles having a particle diameter of 0.1 &mgr;m or smaller, or contains 20% by volume or more of spherical fat particles having a particle diameter of 0.4 &mgr;m or smaller.
    Type: Grant
    Filed: October 10, 2001
    Date of Patent: August 3, 2004
    Assignee: Asahi Denka Kogyo Kabushiki Kaisha
    Inventors: Emi Takahashi, Kenji Ikeda, Yasuo Okutomi
  • Publication number: 20030035859
    Abstract: Whipped cream of the present invention contains substantially no spherical fat particles having a particle diameter of 1 &mgr;m or greater, or contains 10% or more of spherical fat particles having a particle diameter of 0.1 &mgr;m or smaller, or contains 20% by volume or more of spherical fat particles having a particle diameter of 0.4 &mgr;m or smaller.
    Type: Application
    Filed: October 10, 2001
    Publication date: February 20, 2003
    Inventors: Emi Takahashi, Kenji Ikeda, Yasuo Okutomi
  • Patent number: 5456990
    Abstract: A magnetic toner comprising a binder resin having dispersed therein a magnetic powder is disclosed, wherein the magnetic toner has a volume average particle diameter (D.sub.50) of from 4 to 9 .mu.m, the magnetic powder has a number average particle diameter of from 0.15 to 0.25 .mu.m (hereinafter simply referred to as a particle diameter), a BET specific surface area of from 6 to 8 m.sup.2 /g, and a residual magnetization of from 7 to 10 emu/g, the magnetic powder is present in an amount of from 30 to 70% based on the total weight of the magnetic toner, and the magnetic toner has adhered to the surface thereof silica powder having been rendered hydrophobic. The magnetic toner exhibits superior performance in terms of image density, definition, dot and fine line reproducibility, and environmental stability.
    Type: Grant
    Filed: March 17, 1994
    Date of Patent: October 10, 1995
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Seiichi Takagi, Toshiyuki Yano, Hiroe Okuyama, Teruo Masukawa, Sueko Sakai, Emi Takahashi
  • Patent number: 4973538
    Abstract: A toner for development of a latent electrostatic image containing a colorant and a binder resin formed of a mixture of a low-molecular weight component and a high-molecular weight component. Both the low-molecular weight component and high-molecular weight component are made from a styrene-acrylic copolymer where the weight ratio (A) of styrene to acrylic monomer in the low-molecular weight polymer component and an the weight ratio (B) of styrene to acrylic monomer in the high-molecular weight polymer component satisfies the relationship A/B.ltoreq.1.3. The mixing ratio of the low-molecular weight and high-molecular weight components is within the range of from 80:20 to 40:60. The weight-average molecular weight (Mw) and the number-average molecular weight (Mn) of the low-molecular weight polymer component satisfies the relationship Mw/Mn.ltoreq.3.0.
    Type: Grant
    Filed: February 9, 1989
    Date of Patent: November 27, 1990
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Chiaki Suzuki, Masayoshi Shinoki, Koichi Kumashiro, Sueko Sakai, Emi Takahashi
  • Patent number: 4912004
    Abstract: A carrier for a developer is disclosed, comprising a carrier core containing a binder resin and a magnetic powder as essential components, and a coating layer provided on the surface of the carrier core, the coating layer containing a polymer obtained by polymerizing a charge controlling monomer in the presence of polyolefin.
    Type: Grant
    Filed: July 15, 1988
    Date of Patent: March 27, 1990
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Ikutaroh Nagatsuka, Yasuo Matsumura, Masayuki Takeda, Emi Takahashi, Takayoshi Aoki