Patents by Inventor Eisuke Iwazaki

Eisuke Iwazaki 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: 8652722
    Abstract: An electrostatic charge image developing toner contains a binder resin, a release agent, a black colorant, a methylglycine diacetate, and an aluminum element, the content of the methylglycine diacetate is in the range of from 5 ppm to 500 ppm, and the content of the aluminum element is in the range of from 0.07 atomic % to 0.18 atomic % in total element analysis using fluorescent X-rays.
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: February 18, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Satoshi Yoshida, Tsuyoshi Murakami, Eisuke Iwazaki, Shinya Sakamoto
  • Patent number: 8563205
    Abstract: Provided is a magenta toner containing toner particles that contain a colorant and a binder resin, wherein the colorant contains C.I. Pigment Red 57:1 and C.I. Pigment Yellow 180, a mass ratio between the C.I. Pigment Red 57:1 and the C.I. Pigment Yellow 180 being 99:1 to 10000:1, and wherein the binder resin contains a polyester resin that has a repeating unit derived from bisphenol A ethylene oxide represented by formula (1): wherein each of m and n independently represents an integer of 2 to 4.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: October 22, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Eisuke Iwazaki, Shinya Sakamoto, Tsuyoshi Murakami, Satoshi Yoshida, Satoshi Inoue
  • Patent number: 8535864
    Abstract: A magenta toner including toner particles containing a colorant and a binder resin is provided. The colorant contains C.I. Pigment Red 122 and C.I. Pigment Yellow 180 and a mass ratio of the C.I. Pigment Red 122 and the C.I. Pigment Yellow 180 is in the range of 99:1 to 10000:1. The binder resin contains a polyester resin and a polyester resin having a repeating unit obtained from a Bisphenol A alkylene oxide adduct expressed by the following chemical formula is used as the polyester resin: wherein m and n independently represent an integer of 2 to 4, and x and y independently represent a positive number.
    Type: Grant
    Filed: January 18, 2012
    Date of Patent: September 17, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Eisuke Iwazaki, Yuki Takamiya, Satoshi Inoue
  • Publication number: 20130224643
    Abstract: A transparent electrostatic charge image developing toner contains a binder resin, europium, and bismuth.
    Type: Application
    Filed: July 5, 2012
    Publication date: August 29, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yuki TAKAMIYA, Tsuyoshi MURAKAMI, Eisuke IWAZAKI, Satoshi YOSHIDA, Satoshi INOUE
  • Patent number: 8507164
    Abstract: The invention provides a yellow toner including toner particles comprising colorants and a binder resin, the colorants including at least a C. I. Pigment yellow 180 and a carmine-based pigment, a weight ratio of the C. I. Pigment yellow 180 to the carmine-based pigment being from about 99:1 to about 10,000:1, the binder resin being a polyester resin comprising a first repeating unit derived from a first diol compound, and the first diol compound being a bisphenol A ethylene oxide represented by the following formula (1): wherein in formula (1), m and n each independently represent an integer of from 2 to 4.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: August 13, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Eisuke Iwazaki, Satoshi Yoshida, Shinya Sakamoto
  • Patent number: 8431301
    Abstract: There is provided a toner for developing an electrostatic charge image including a binder resin, a colorant and a releasing agent, wherein the content ratio of particles having a number particle diameter of 4.5 ?m or more and less than 7.5 ?m and a circularity degree of 0.980 or more is in a range from about 5 number % to about 15 number %, and the content ratio of particles having a number particle diameter of not 7.5 ?m or more and less than 15 ?m and a circularity degree of 0.900 or more and less than 0.940 is about 5 number % or less.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: April 30, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Masanobu Ninomiya, Kiyohiro Yamanaka, Hirokazu Hamano, Eisuke Iwazaki, Hiroshi Nakazawa
  • Publication number: 20130078565
    Abstract: An electrostatic charge image developing toner contains a binder resin, a release agent, a black colorant, a methylglycine diacetate, and an aluminum element, the content of the methylglycine diacetate is in the range of from 5 ppm to 500 ppm, and the content of the aluminum element is in the range of from 0.07 atomic % to 0.18 atomic % in total element analysis using fluorescent X-rays.
    Type: Application
    Filed: February 15, 2012
    Publication date: March 28, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Satoshi YOSHIDA, Tsuyoshi MURAKAMI, Eisuke IWAZAKI, Shinya SAKAMOTO
  • Publication number: 20130078564
    Abstract: A magenta toner including toner particles containing a colorant and a binder resin is provided. The colorant contains C.I. Pigment Red 122 and C.I. Pigment Yellow 180 and a mass ratio of the C.I. Pigment Red 122 and the C.I. Pigment Yellow 180 is in the range of 99:1 to 10000:1. The binder resin contains a polyester resin and a polyester resin having a repeating unit obtained from a Bisphenol A alkylene oxide adduct expressed by the following chemical formula is used as the polyester resin: wherein m and n independently represent an integer of 2 to 4, and x and y independently represent a positive number.
    Type: Application
    Filed: January 18, 2012
    Publication date: March 28, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Eisuke IWAZAKI, Yuki TAKAMIYA, Satoshi INOUE
  • Publication number: 20130071782
    Abstract: An electrostatic latent image developing toner contains a binder resin, a colorant, europium, and bismuth.
    Type: Application
    Filed: February 8, 2012
    Publication date: March 21, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yuki TAKAMIYA, Eisuke IWAZAKI, Satoshi YOSHIDA, Satoshi INOUE
  • Patent number: 8298741
    Abstract: An image forming apparatus includes plural developing units separately containing a toner A and a toner B that satisfy relationships (1) and (2) and have similar colors. The toner A and the toner B each contain a binder resin containing a polyester about 90 mass % or more of the binder resin, and about 90 mass % of the binder resin of the toner A and about 90 mass % of the binder resin of the toner B are the same resin. The polyester contains an amorphous polyester having an alkyl side chain and a crystalline polyester. The relationship (1) is Ta (toner A)>Tb (toner B) in terms of flow tester ½ effluent temperature. The relationship (2) is Aa (toner A)>Ab (toner B) in terms of an amount of an aluminum (with reference to net intensity) measured with fluorescent X-ray.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: October 30, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Satoshi Yoshida, Eisuke Iwazaki, Shintaro Anno
  • Publication number: 20120270145
    Abstract: An electrostatic charge image developing toner includes a binder resin that contains an amorphous polyester resin and a colorant. The toner satisfies the following expressions: 20 ?S/cm???150 ?S/cm, and 0.01<Cm/(Cc+Co)<0.1, where ? represents the conductivity of a supernatant solution when 0.1 g of the toner is dissolved in 30 ml of tetrahydrofuran, Cm represents the content (% by mass) of metal elements Al, Mg, and Fe, Cc represents the content (% by mass) of carbon, and Co represents the content by mass) of oxygen.
    Type: Application
    Filed: October 27, 2011
    Publication date: October 25, 2012
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shinya SAKAMOTO, Satoshi INOUE, Satoshi YOSHIDA, Eisuke IWAZAKI, Tsuyoshi MURAKAMI
  • Publication number: 20120183895
    Abstract: Provided is a magenta toner containing toner particles that contain a colorant and a binder resin, wherein the colorant contains C.I. Pigment Red 57:1 and C.I. Pigment Yellow 180, a mass ratio between the C.I. Pigment Red 57:1 and the C.I. Pigment Yellow 180 being 99:1 to 10000:1, and wherein the binder resin contains a polyester resin that has a repeating unit derived from bisphenol A ethylene oxide represented by formula (1): wherein each of m and n independently represents an integer of 2 to 4.
    Type: Application
    Filed: September 2, 2011
    Publication date: July 19, 2012
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Eisuke IWAZAKI, Shinya SAKAMOTO, Tsuyoshi MURAKAMI, Satoshi YOSHIDA, Satoshi INOUE
  • Publication number: 20120077117
    Abstract: The invention provides a yellow toner including toner particles comprising colorants and a binder resin, the colorants including at least a C. I. Pigment yellow 180 and a carmine-based pigment, a weight ratio of the C. I. Pigment yellow 180 to the carmine-based pigment being from about 99:1 to about 10,000:1, the binder resin being a polyester resin comprising a first repeating unit derived from a first diol compound, and the first diol compound being a bisphenol A ethylene oxide represented by the following formula (1): wherein in formula (1), m and n each independently represent an integer of from 2 to 4.
    Type: Application
    Filed: February 2, 2011
    Publication date: March 29, 2012
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Eisuke IWAZAKI, Satoshi YOSHIDA, Shinya SAKAMOTO
  • Publication number: 20110300477
    Abstract: An image forming apparatus includes plural developing units separately containing a toner A and a toner B that satisfy relationships (1) and (2) and have similar colors. The toner A and the toner B each contain a binder resin containing a polyester about 90 mass % or more of the binder resin, and about 90 mass % of the binder resin of the toner A and about 90 mass % of the binder resin of the toner B are the same resin. The polyester contains an amorphous polyester having an alkyl side chain and a crystalline polyester. The relationship (1) is Ta (toner A)>Tb (toner B) in terms of flow tester ½ effluent temperature. The relationship (2) is Aa (toner A)>Ab (toner B) in terms of an amount of an aluminum (with reference to net intensity) measured with fluorescent X-ray.
    Type: Application
    Filed: October 21, 2010
    Publication date: December 8, 2011
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Satoshi YOSHIDA, Eisuke IWAZAKI, Shintaro ANNO
  • Patent number: 8021813
    Abstract: An electrostatic-image-developing toner includes a phosphonic acid based sequestering agent.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: September 20, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shuji Sato, Eisuke Iwazaki, Atsushi Sugawara, Masanobu Ninomiya, Hiroshi Nakazawa
  • Publication number: 20110189604
    Abstract: A toner for electrostatic latent image development is disclosed. The toner for electrostatic latent image development includes toner particles, the toner particles includes a binder resin and a release agent, and the toner has a linear thermal expansion coefficient in accordance with JIS K 7197-1991 of from about 6×10?5/C.° to about 1×10?3/C.°. An electrostatic latent image developer, a toner cartridge, a process cartridge, and an image forming apparatus are also disclosed.
    Type: Application
    Filed: August 9, 2010
    Publication date: August 4, 2011
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Eisuke IWAZAKI, Satoshi Yoshida, Shintaro Anno, Masaki Nakamura, Satoshi Inoue
  • Patent number: 7951519
    Abstract: A toner for development of an electrostatic image includes at least a crystalline polyester resin and a colorant. The toner shows a dielectric loss index ?? of 0.1 or less at 0.1 Hz and 500 V at 30° C. and 90% RH.
    Type: Grant
    Filed: March 20, 2008
    Date of Patent: May 31, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Eisuke Iwazaki, Shuji Sato, Atsushi Sugawara, Hiroshi Nakazawa
  • Publication number: 20100068643
    Abstract: An electrostatic-image-developing toner includes a binder resin; a colorant; a releasing agent having a melting temperature of from about 70° C. to about 100° C.; and an ethylenediaminedisuccinic acid.
    Type: Application
    Filed: March 17, 2009
    Publication date: March 18, 2010
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Eisuke IWAZAKI, Shuji SATO, Atsushi SUGAWARA, Hiroshi NAKAZAWA
  • Patent number: 7618761
    Abstract: A toner for electrostatic image development comprising a binder resin and a colorant, the toner having a content of an aluminum element with respect to carbon of approximately 0.005 atm % to approximately 0.02 atm % as measured by X-ray photo-electron spectroscopy.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: November 17, 2009
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takeshi Shoji, Hiroshi Nakazawa, Masanobu Ninomiya, Shuji Sato, Eisuke Iwazaki
  • Publication number: 20090274972
    Abstract: An electrostatic-image-developing toner includes a phosphonic acid based sequestering agent.
    Type: Application
    Filed: December 15, 2008
    Publication date: November 5, 2009
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shuji SATO, Eisuke IWAZAKI, Atsushi SUGAWARA, Masanobu NINOMIYA, Hiroshi NAKAZAWA