Patents by Inventor Takahisa Fujii

Takahisa Fujii 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: 20080148755
    Abstract: A cooling apparatus for cooling an electronic device 100 mounted on a vehicle in combination with an automotive climate control system 10 having a refrigeration cycle for compressing and expanding a first heating medium is disclosed. The cooling apparatus includes a second heating medium in liquid form, a tubular path 60 for circulating the second heating medium flowing therein, a heat absorber 30 for transmitting the heat from the electronic device 100 to the second heating medium, a heat dissipator 40 for transmitting the heat from the second heating medium to the evaporator 15, and a pump 50 for circulating the second heating medium. The heat dissipator 40 is coupled to the tank unit 15c of the evaporator 15.
    Type: Application
    Filed: August 21, 2007
    Publication date: June 26, 2008
    Applicant: DENSO Corporation
    Inventors: Takahisa Fujii, Yuji Ito, Yasuhiko Niimi
  • Patent number: 7364826
    Abstract: There is provided an electrostatic latent image developing toner including a binder resin, a colorant, and a release agent, wherein the shape factor SF1 of the toner is within the range from 110 to 140, the volume average particle size of the toner is within the range from 1.2 ?m to 4.8 ?m, and the crystallinity of the release agent within the toner is within the range from 35 to 80. There is also provided a method for manufacturing such a toner.
    Type: Grant
    Filed: August 2, 2004
    Date of Patent: April 29, 2008
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takahisa Fujii, Hiroyoshi Okuno, Shinichirou Kawashima, Takeshi Iwanaga, Toshiaki Hasegawa
  • Publication number: 20070204637
    Abstract: A brine-type cooling apparatus applied to a vehicle equipped with a vehicle air conditioning case 11, a blower 13, and an air conditioner control ECU 23 as air conditioner controlling means, said brine type cooling apparatus comprising a heat absorbing member 8 for absorbing heat from an electronic equipment 7, a heat radiating member 2 for discharging the absorbed heat, a brine pipeline 6 and a circulation pump 9, and a cooling apparatus control ECU 30 as cooling apparatus controlling means. Even when the air conditioner control ECU 23 stops the blower 13 as air conditioner control, an air flow rate is controlled to set an airflow rate of the blower 13 to a predetermined flow rate based on the brine temperature detected by an inlet water temperature sensor 32.
    Type: Application
    Filed: March 1, 2007
    Publication date: September 6, 2007
    Applicant: DENSO Corporation
    Inventors: Takahisa Fujii, Yuji Ito, Yasuhiko Niimi, Takashi Yamamoto, Eiichi Kamei, Takahiro Yoshida
  • 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
  • Patent number: 7018764
    Abstract: The present invention relates to a toner for developing electrostatic images characterized in that a reactive polymer which cross-links when heated at a temperature higher than a maximum temperature at the preparation of the toner for developing electrostatic images, at image fixation and/or after fixation, is contained in a toner for developing electrostatic images containing at least a binder resin, and/or is added to the surface thereof.
    Type: Grant
    Filed: June 19, 2003
    Date of Patent: March 28, 2006
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasuo Matsumura, Kazuhiko Yanagida, Manabu Serizawa, Hidekazu Yaguchi, Takahisa Fujii, Tsutomu Kubo, Shigeru Seitoku
  • Publication number: 20060051691
    Abstract: A toner for developing an electrostatic latent image is provided that can prevent occurrence of blister even with coated paper having a coated surface, exhibits excellent releasing performance in oilless fixing, and realizes both high glossiness and OHP transparency for an image to be formed. A process for producing the toner, a developer containing the toner, and a process for forming an image using the toner are also provided. The toner for developing an electrostatic latent image contains a binder resin, a releasing agent and a colorant, in which the binder resin has a number average molecular weight (Mn) in a range of from 9,000 to 18,000 and a molecular weight distribution represented by a ratio (Mw/Mn) of a weight average molecular weight (Mw) and a number average molecular weight (Mn) of 2.5 or less, and the binder resin contains a vinyl resin.
    Type: Application
    Filed: September 12, 2005
    Publication date: March 9, 2006
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Tomohito Nakajima, Satoshi Yoshida, Hidekazu Yaguchi, Takahisa Fujii, Yasuo Matsumura
  • Patent number: 7001701
    Abstract: The present invention discloses a color toner providing highly gloss image and documents with excellent long term storability; an electrostatic latent image developer; and an image forming method. Disclosed is a color toner comprising a binder resin and colorant, wherein the weight average molecular weight of the binder resin is from 6000 to 45000, the toner's glass transition temperature (Tg) is from 40 to 70° C., the loss tangent tan ? of dynamic viscoelasticity is from 0.1 to 2.5 in the temperature of from the toner's glass transition temperature (Tg) to the temperature at which the loss modulus (G?) is 1×105 Pa, and the toner comprises 3 to 20% by mass of an ester derivative of an alicyclic compound having 1 or more carboxyl groups, and an electrostatic latent image developer and an image forming method, which use the color toner.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: February 21, 2006
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takahisa Fujii, Yasuo Matsumura, Kazuhiko Yanagida, Manabu Serizawa, Hidekazu Yaguchi, Masaki Nakamura, Daisuke Ishizuka
  • Patent number: 6933092
    Abstract: A magenta toner for electrophotography includes a binder resin and a colorant, wherein the toner contains at least a naphthol pigment having a structure represented by the following general formula (1) as the colorant, and has a shape factor SF1 of 110 to 140 obtained by the equation below and a volume average particle size of 2 to 9 ?m: wherein R represents the following group, and R? represents a hydrogen atom, an alkyl group or a methoxy group; SF1=R2/A×?/4×100 wherein R represents the maximum length of the toner and A represents the projected area of the toner.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: August 23, 2005
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Satoshi Yoshida, Yasuo Matsumura, Toyofumi Inoue, Hidekazu Yaguchi, Takahisa Fujii
  • Publication number: 20050181295
    Abstract: There is provided an electrostatic latent image developing toner including a binder resin, a colorant, and a release agent, wherein the shape factor SF1 of the toner is within the range from 110 to 140, the volume average particle size of the toner is within the range from 1.2 ?m to 4.8 ?m, and the crystallinity of the release agent within the toner is within the range from 35 to 80. There is also provided a method for manufacturing such a toner.
    Type: Application
    Filed: August 2, 2004
    Publication date: August 18, 2005
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Takahisa Fujii, Hiroyoshi Okuno, Shinichirou Kawashima, Takeshi Iwanaga, Toshiaki Hasegawa
  • Patent number: 6890694
    Abstract: A toner for developing an electrostatic image and a process for producing the same, a developer for developing an electrostatic image, and a process for producing an image are provided. The toner contains a colorant and a binder resin, and also contains a polyolefin resin containing a polar group and having a glass transition point of 20° C. or less and a weight average molecular weight of 10,000 or more.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: May 10, 2005
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasuo Matsumura, Hidekazu Yaguchi, Satoshi Yoshida, Takahisa Fujii, Tomohito Nakajima
  • Publication number: 20050058923
    Abstract: The present invention discloses a color toner providing highly gloss image and documents with excellent long term storability; an electrostatic latent image developer; and an image forming method. Disclosed is a color toner comprising a binder resin and colorant, wherein the weight average molecular weight of the binder resin is from 6000 to 45000, the toner's glass transition temperature (Tg) is from 40 to 70° C., the loss tangent tan ? of dynamic viscoelasticity is from 0.1 to 2.5 in the temperature of from the toner's glass transition temperature (Tg) to the temperature at which the loss modulus (G?) is 1×105 Pa, and the toner comprises 3 to 20% by mass of an ester derivative of an alicyclic compound having 1 or more carboxyl groups, and an electrostatic latent image developer and an image forming method, which use the color toner.
    Type: Application
    Filed: October 26, 2004
    Publication date: March 17, 2005
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Takahisa Fujii, Yasuo Matsumura, Kazuhiko Yanagida, Manabu Serizawa, Hidekazu Yaguchi, Masaki Nakamura, Daisuke Ishizuka
  • Patent number: 6846603
    Abstract: The present invention discloses a color toner providing highly gloss image and documents with excellent long term storability; an electrostatic latent image developer; and an image forming method. Disclosed is a color toner comprising a binder resin and colorant, wherein the weight average molecular weight of the binder resin is from 6000 to 45000, the toner's glass transition temperature (Tg) is from 40 to 70° C., the loss tangent tan ? of dynamic viscoelasticity is from 0.1 to 2.5 in the temperature of from the toner's glass transition temperature (Tg) to the temperature at which the loss modulus (G?) is 1×105 Pa, and the toner comprises 3 to 20% by mass of an ester derivative of an alicyclic compound having 1 or more carboxyl groups, and an electrostatic latent image developer and an image forming method, which use the color toner.
    Type: Grant
    Filed: February 25, 2003
    Date of Patent: January 25, 2005
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takahisa Fujii, Yasuo Matsumura, Kazuhiko Yanagida, Manabu Serizawa, Hidekazu Yaguchi, Masaki Nakamura, Daisuke Ishizuka
  • Patent number: 6828073
    Abstract: Such a toner for developing an electrostatic image is to be provided that has a wide fixable temperature range, is excellent in development and transfer performance and excellent in releasing performance, realizes both glossiness and transparency, and is capable of providing an image (particularly a color image) of a wide color reproduction range having high quality and high durability, a developer for an electrostatic image, and a process for forming an image. The toner for developing an electrostatic image contains a binder resin, a colorant and an inorganic metallic salt, and an amount of a toluene insoluble component (provided that the colorant, a releasing agent and inorganic and organic insoluble particles are excluded therefrom) is from 0.5 to 10% by weight. The developer for an electrostatic image and the process for forming an image use the toner for developing an electrostatic image.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: December 7, 2004
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasuo Matsumura, Hidekazu Yaguchi, Satoshi Yoshida, Takahisa Fujii, Tomohito Nakajima
  • Patent number: 6821702
    Abstract: The present invention relates to a method of forming images. The method includes the steps of forming electrostatic latent images on an electrostatic image carrier, forming toner images with a toner-containing developer by developing the electrostatic latent images on the electrostatic image carrier, transferring the toner images onto a transfer material, and thermally fixing the toner images, wherein an electrophotographic toner including containing at least a binder resin, a colorant, and a releasing agent in the range of 10 to 25% by mass relative to toner particles and having a shape factor SF1 of 140 or less is used as the toner, and the thermal fixing step is carried out so as to satisfy, at a process speed of at least 170 mm/sec., the relationship (A): 200<0.7×&agr;+2000×&bgr; wherein &agr; is a fixing temperature (° C.), &bgr; is a heating time (second), and &agr; is 160° C. or higher.
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: November 23, 2004
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takahisa Fujii, Yasuo Matsumura, Hidekazu Yaguchi, Satoshi Yoshida, Tomohito Nakajima
  • 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
  • Publication number: 20040058266
    Abstract: The present invention relates to a toner for developing electrostatic images characterized in that a reactive polymer which cross-links when heated at a temperature higher than a maximum temperature at the preparation of the toner for developing electrostatic images, at image fixation and/or after fixation, is contained in a toner for developing electrostatic images containing at least a binder resin, and/or is added to the surface thereof.
    Type: Application
    Filed: June 19, 2003
    Publication date: March 25, 2004
    Applicant: Fuji Xerox Co., Ltd.
    Inventors: Yasuo Matsumura, Kazuhiko Yanagida, Manabu Serizawa, Hidekazu Yaguchi, Takahisa Fujii, Tsutomu Kubo, Shigeru Seitoku
  • Publication number: 20040058262
    Abstract: The present invention provides a toner containing toner particles having a weight average molecular weight of 20,000 to 35,000. The toner is characterized in that upon using the toner to produce a 4.0 g/m2 solid portion on a paper having a basis weight of 104 g/m2, contacting the solid portion with a heating member of an image fixing device for 40 ms, and thereby fixing the solid portion on the paper, Gt(190)≧35% given that a glossiness of the solid portion when fixed at 190° C. according to JIS Z8741:97 is defined to be Gt(190), and 0.8≦Gt(180)/Gt(190)≦1.2 given that a glossiness of the solid portion when fixed at 180° C. is defined to be Gt(180).
    Type: Application
    Filed: March 7, 2003
    Publication date: March 25, 2004
    Applicant: Fuji Xerox Co., Ltd.
    Inventors: Manabu Serizawa, Kazuhiko Yanagida, Hidekazu Yaguchi, Takahisa Fujii, Yasuo Matsumura, Yasuo Kadokura
  • Publication number: 20040058261
    Abstract: The present invention discloses a color toner providing highly gloss image and documents with excellent long term storability; an electrostatic latent image developer; and an image forming method. Disclosed is a color toner comprising a binder resin and colorant, wherein the weight average molecular weight of the binder resin is from 6000 to 45000, the toner's glass transition temperature (Tg) is from 40 to 70° C., the loss tangent tan &dgr; of dynamic viscoelasticity is from 0.1 to 2.5 in the temperature of from the toner's glass transition temperature (Tg) to the temperature at which the loss modulus (G″) is 1×105 Pa, and the toner comprises 3 to 20% by mass of an ester derivative of an alicyclic compound having 1 or more carboxyl groups, and an electrostatic latent image developer and an image forming method, which use the color toner.
    Type: Application
    Filed: February 25, 2003
    Publication date: March 25, 2004
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Takahisa Fujii, Yasuo Matsumura, Kazuhiko Yanagida, Manabu Serizawa, Hidekazu Yaguchi, Masaki Nakamura, Daisuke Ishizuka
  • Publication number: 20030219665
    Abstract: A toner for developing an electrostatic image and a process for producing the same, a developer for developing an electrostatic image, and a process for producing an image are provided. The toner contains a colorant and a binder resin, and also contains a polyolefin resin containing a polar group and having a glass transition point of 20° C. or less and a weight average molecular weight of 10,000 or more.
    Type: Application
    Filed: April 14, 2003
    Publication date: November 27, 2003
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yasuo Matsumura, Hidekazu Yaguchi, Satoshi Yoshida, Takahisa Fujii, Tomohito Nakajima
  • Publication number: 20030194628
    Abstract: A magenta toner for electrophotography includes a binder resin and a colorant, wherein the toner contains at least a naphthol pigment having a structure represented by the following general formula (1) as the colorant, and has a shape factor SF1 of 110 to 140 obtained by the equation below and a volume average particle size of 2 to 9 &mgr;m: 1
    Type: Application
    Filed: August 16, 2002
    Publication date: October 16, 2003
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Satoshi Yoshida, Yasuo Matsumura, Toyofumi Inoue, Hidekazu Yaguchi, Takahisa Fujii, Tomohito Nakajima