Patents by Inventor Koji Nishikawa

Koji Nishikawa 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: 20190064686
    Abstract: A toner contains toner particles, titanate fine particles having a Group II element, and hydrotalcite compound fine particles as an external additive and satisfying 10?Lt?80 and 100?Lh?Weight average particle diameter (D4) of toner particles×0.50, when the number average particle diameter (D1) of primary particles of the titanate fine particles is defined as Lt (nm) and the number average particle diameter (D1) of primary particles of the hydrotalcite compound fine particles is defined as Lh (nm).
    Type: Application
    Filed: August 23, 2018
    Publication date: February 28, 2019
    Inventors: Kazuo Terauchi, Yojiro Hotta, Koji Nishikawa, Masami Fujimoto, Takaaki Furui, Ryo Nagata, Keisuke Tanaka
  • Publication number: 20190034314
    Abstract: A simulation apparatus of a multi-core model according to the present invention includes: a plurality of processor core models that each executes an instruction being input; a processing time calculator that calculates time at which each of the plurality of processor core models executes the instruction as processing time; a scheduler that selects a processor core model to be executed next from among the plurality of processor core models on the basis of the processing time calculated by the processing time calculator; and an overall time holding unit that holds processing time of the entire simulation apparatus determined from the processing time calculated by the processing time calculator, where the processor core model selected by the scheduler executes a next instruction in accordance with a direction from the scheduler.
    Type: Application
    Filed: March 1, 2016
    Publication date: January 31, 2019
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Daisuke OGAWA, Osamu TOYAMA, Tetsuya TAKEO, Koji NISHIKAWA
  • Patent number: 10176001
    Abstract: A simulation device being a “host” simulates execution of a program in a “guest” using a cache for reading instructions in the program. In the simulation device, an execution unit executes instructions described in host code stored in a buffer. When host code wherein a next instruction being an instruction to be executed by the execution unit next is described is not stored in the buffer, a processing unit reads from a storage medium a guest code group with a size of a cache line, including guest code wherein the next instruction is described, converts the guest code group read, generates a host code group including the host code wherein the next instruction is described, and collectively writes the host code group generated, as a host code block, in the buffer.
    Type: Grant
    Filed: May 28, 2015
    Date of Patent: January 8, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Osamu Toyama, Koji Nishikawa
  • Patent number: 10101683
    Abstract: Provided is a toner, including: a toner particle; and an organic-inorganic composite fine particle on a surface of the toner particle, in which the organic-inorganic composite fine particle includes: a resin fine particle; and an inorganic fine particle embedded in the resin fine particle, and part of which is exposed to a surface of the composite fine particle, and in which the composite fine particle satisfies the following relationships: (i) in viscoelasticity measurement of the composite fine particle, when the loss elastic modulus thereof at a temperature T (° C.) is represented by G?T [dN/m2], a change ratio d(Log(G?T))/dT of a common logarithm of the loss elastic modulus has a minimum in a temperature range of from 60° C. to 150° C., and the minimum is less than ?0.10; and (ii) the loss elastic modulus (G?180) thereof at a temperature of 180° C. is 1.0×104 dN/m2 or more and 1.0×107 dN/m2 or less.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: October 16, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Koji Nishikawa, Shuhei Moribe, Daisuke Yoshiba, Shotaro Nomura, Kosuke Fukudome, Hiroki Akiyama, Yojiro Hotta, Katsuhisa Yamazaki
  • Publication number: 20180246432
    Abstract: Provided is toner that contains a toner particle, and an external additive containing a strontium titanate particle, wherein the toner has an average circularity of at least 0.935 and not more than 0.995, the strontium titanate particle has a number-average primary particle diameter of at least 10 nm and not more than 60 nm, the strontium titanate particle has a peak in the range of 39.700°±0.150° and a peak in the range of 46.200°±0.150° in a CuK? x-ray diffraction spectrum obtained in the 2? range of at least 10° and not more than 90° where ? is the Bragg angle, and the ratio of the area Sb of the peak at 46.200°±0.150° to the area Sa of the peak at 39.700°±0.150° is at least 1.80 and not more than 2.30.
    Type: Application
    Filed: February 21, 2018
    Publication date: August 30, 2018
    Inventors: Koji Nishikawa, Yojiro Hotta, Kazuo Terauchi, Takaaki Furui, Ryo Nagata, Keisuke Tanaka, Kazuyuki Sato, Yu Yoshida, Yusuke Kosaki, Masami Fujimoto
  • Publication number: 20180246430
    Abstract: A toner including a toner particle and an external additive, wherein the external additive contains an inorganic fine particle A and a silica fine particle; in a surface of the toner observed using a scanning electron microscope, a number-average particle diameter of primary particle of the silica fine particle is from 5 nm to 50 nm, a number-average particle diameter of primary particle of the inorganic fine particle A is at least 10 nm and less than 60 nm, a coverage ratio X1 of the toner surface covered by the silica fine particle is from 60 area % to 95 area %, the inorganic fine particle A is a fine particle of a titanate having a Group 2 element, and a coverage ratio X2 of the toner surface covered by the inorganic fine particle A is from 5 area % to 40 area %.
    Type: Application
    Filed: February 23, 2018
    Publication date: August 30, 2018
    Inventors: Keisuke Tanaka, Yojiro Hotta, Kazuo Terauchi, Koji Nishikawa, Takaaki Furui, Ryo Nagata, Kazuyuki Sato, Yu Yoshida, Yusuke Kosaki, Masami Fujimoto
  • Patent number: 10025212
    Abstract: A toner includes toner particles and an external additive; the external additive includes an external additive A containing fine particles of a crystalline resin or fine particles of a wax; the crystalline resin and the wax each have an urethane bond or an urea bond; and the melting point of the crystalline resin and the melting point of the wax are each from 50° C. to 130° C.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: July 17, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koji Nishikawa, Shuhei Moribe, Daisuke Yoshiba, Kosuke Fukudome, Shotaro Nomura, Atsuhiko Ohmori, Katsuhisa Yamazaki
  • Publication number: 20180173125
    Abstract: Provided is a toner having a toner particle including a binder resin and a colorant, wherein the toner has a softening point of at least 100° C. and not more than 150° C., and when Tgt represents a glass transition temperature (° C.) of the toner during a second temperature rise as measured with a DSC, Tgf represents a glass transition temperature (° C.) of a tetrahydrofuran-insoluble matter of the binder resin during a second temperature rise as measured with a DSC, and Tgk represents a glass transition temperature (° C.) of a tetrahydrofuran-soluble matter of the binder resin during a second temperature rise as measured with a DSC, the toner satisfies Tgt>Tgf (1), Tgt>Tgk (2), and 35° C.?Tgf?70° C. (3).
    Type: Application
    Filed: December 13, 2017
    Publication date: June 21, 2018
    Inventors: Kosuke Fukudome, Hiroyuki Tomono, Shuhei Moribe, Koji Nishikawa, Daisuke Yoshiba, Shotaro Nomura, Atsuhiko Ohmori, Sho Kimura, Tatsuya Saeki, Katsuhisa Yamazaki
  • Publication number: 20180173126
    Abstract: A toner comprising a toner particle containing a resin and a colorant, wherein, with respect to a temperature-storage elastic modulus curve obtained by powder dynamic viscoelastic measurement on the toner, (I) the relative minimum values for the variation in the storage elastic modulus E? with respect to temperature T in the temperature range of at least 30° C. and not more than 180° C. have a relative minimum value of equal to or less than ?1.00×107 and the relative minimum value on the lowest temperature side is equal to or less than ?1.00×108; (II) the storage elastic modulus E? (50) of the toner at 50° C. is at least 1.00×109 and not more than 9.00×109; and (III) for a storage elastic modulus E? (120) of the toner at 120° C., E? (50) and E? (120) satisfy 1.50?[E? (50)]/[E? (120)]?3.00.
    Type: Application
    Filed: December 15, 2017
    Publication date: June 21, 2018
    Inventors: Atsuhiko Ohmori, Shuhei Moribe, Koji Nishikawa, Kosuke Fukudome, Daisuke Yoshiba, Hiroyuki Tomono, Shotaro Nomura, Sho Kimura, Tatsuya Saeki, Katsuhisa Yamazaki
  • Publication number: 20180150366
    Abstract: In a program execution device (100X), a memory (110) stores first information (101X) specifying one or more programs, and second information (102X) specifying some programs including at least one of programs to be executed by an other program execution device (100Y), out of the programs specified by the first information (101X) and the programs to be executed by the other program execution device (100Y). When an error in the other program execution device (100Y) is not detected by an error processing unit (123), an instruction processing unit (120) executes the programs specified by the first information (101X). When the error in the other program execution device (100Y) is detected by the error processing unit (123), the instruction processing unit (120) executes the programs specified by the second information (102X).
    Type: Application
    Filed: July 30, 2015
    Publication date: May 31, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Koji NISHIKAWA, Takahiro UENO, Shigeru HASHIMOTO
  • Publication number: 20180143890
    Abstract: In a simulation apparatus, an execution unit sequentially loads host codes stored in a buffer. The execution unit executes an instruction of each loaded host code. The execution unit also determines whether a corresponding code being a target code corresponding to each loaded host code is included in a tag table. When the execution unit determines that the corresponding code is not included in the tag table, the execution unit simulates an operation for a cache miss situation with respect to the corresponding code. The execution unit updates the tag table according to the simulated operation.
    Type: Application
    Filed: May 26, 2015
    Publication date: May 24, 2018
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Daisuke OGAWA, Osamu TOYAMA, Koji NISHIKAWA
  • Publication number: 20180136956
    Abstract: A simulation device being a “host” simulates execution of a program in a “guest” using a cache for reading instructions in the program. In the simulation device, an execution unit executes instructions described in host code stored in a buffer. When host code wherein a next instruction being an instruction to be executed by the execution unit next is described is not stored in the buffer, a processing unit reads from a storage medium a guest code group with a size of a cache line, including guest code wherein the next instruction is described, converts the guest code group read, generates a host code group including the host code wherein the next instruction is described, and collectively writes the host code group generated, as a host code block, in the buffer.
    Type: Application
    Filed: May 28, 2015
    Publication date: May 17, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Osamu TOYAMA, Koji NISHIKAWA
  • Patent number: 9971263
    Abstract: Provided is a toner having a toner particle that contains a binder resin and a magnetic particle, wherein the magnetic particle satisfies the following stipulations (i) to (iii): (i) the magnetic particle has a prescribed shape and has a protruded portion on a plane portion thereof, (ii) the magnetic particle has a core particle that contains magnetite and has a coating layer, and (iii) the coating layer contains an iron-containing oxide and at least one of a silicon-containing oxide and an aluminum-containing oxide. In a molecular weight distribution measured on the tetrahydrofuran-soluble matter of the toner, the ratio (Mw/Mn) of a weight-average molecular weight to a number-average molecular weight is at least 10.0.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: May 15, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kosuke Fukudome, Shuhei Moribe, Koji Nishikawa, Daisuke Yoshiba, Shotaro Nomura, Atsuhiko Ohmori, Sho Kimura, Katsuhisa Yamazaki
  • Patent number: 9829818
    Abstract: Provided is a toner that uses a crystalline resin, and demonstrates favorable dispersibility of the crystalline resin in the toner, demonstrates superior low-temperature fixability, and is able to inhibit fogging. The toner has a toner particle comprising a resin A, which has a long-chain alkyl group having an average number of carbon atoms of 27 to 50, and a crystalline resin, wherein the SP value (cal/cm3)1/2 of the crystalline resin is 9.00 to 12.00, and in a GC/MS analysis of components that volatize when the toner is heated for 10 minutes at 200° C., the amount of volatile components of saturated hydrocarbons having 30 to 37 carbon atoms is 90 ppm to 260 ppm of toluene equivalent, based on mass.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: November 28, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Daisuke Yoshiba, Katsuhisa Yamazaki, Koji Nishikawa, Shotaro Nomura, Hiroki Akiyama, Masami Fujimoto
  • Patent number: 9772570
    Abstract: Provided is a toner having good endurance stability and good low-temperature fixability in high-speed printing, and having good resistance to the adhesion of printed paper. The toner is a magnetic toner having, on the surface of toner particle containing a binder resin and an ester compound as a releasing agent, inorganic fine particle “a” and organic-inorganic composite fine particle having a volumetric specific heat of from 2,900 kJ/(m3·° C.) to 4,200 kJ/(m3·° C.), in which a coverage A of the surface of the toner particle with the inorganic fine particle “a” is 45.0% or more and 70.0% or less.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: September 26, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shohei Tsuda, Yojiro Hotta, Koji Nishikawa, Masami Fujimoto, Katsuhisa Yamazaki
  • Publication number: 20170212441
    Abstract: A toner includes toner particles and an external additive; the external additive includes an external additive A containing fine particles of a crystalline resin or fine particles of a wax; the crystalline resin and the wax each have an urethane bond or an urea bond; and the melting point of the crystalline resin and the melting point of the wax are each from 50° C. to 130° C.
    Type: Application
    Filed: January 24, 2017
    Publication date: July 27, 2017
    Inventors: Koji Nishikawa, Shuhei Moribe, Daisuke Yoshiba, Kosuke Fukudome, Shotaro Nomura, Atsuhiko Ohmori, Katsuhisa Yamazaki
  • Patent number: 9715188
    Abstract: The toner comprising a toner particle containing a binder resin and a colorant, an iron oxide particle and an organic-inorganic composite fine particle, wherein the organic-inorganic composite fine particle comprises a vinyl resin particle, and inorganic fine particles which are embedded in the vinyl resin particle, and at least a part of which is exposed at surface of the organic-inorganic composite fine particle; the organic-inorganic composite fine particle has convexes derived from the inorganic fine particles, and wherein: a coverage ratio of the surface of the organic-inorganic composite fine particle with the inorganic fine particle is 20-70%; and the content of the iron oxide particle present on a surface of the toner particle is 0.1-5.0 mass % based on the mass of the toner particle.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: July 25, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kazuo Terauchi, Koji Nishikawa, Shohei Tsuda, Yojiro Hotta, Katsuhisa Yamazaki, Takayuki Itakura, Takeshi Naka, Motohide Shiozawa
  • Publication number: 20170199475
    Abstract: Provided is a toner having a toner particle that contains a binder resin and a magnetic particle, wherein the magnetic particle satisfies the following stipulations (i) to (iii): (i) the magnetic particle has a prescribed shape and has a protruded portion on a plane portion thereof, (ii) the magnetic particle has a core particle that contains magnetite and has a coating layer, and (iii) the coating layer contains an iron-containing oxide and at least one of a silicon-containing oxide and an aluminum-containing oxide. In a molecular weight distribution measured on the tetrahydrofuran-soluble matter of the toner, the ratio (Mw/Mn) of a weight-average molecular weight to a number-average molecular weight is at least 10.0.
    Type: Application
    Filed: December 29, 2016
    Publication date: July 13, 2017
    Inventors: Kosuke Fukudome, Shuhei Moribe, Koji Nishikawa, Daisuke Yoshiba, Shotaro Nomura, Atsuhiko Ohmori, Sho Kimura, Katsuhisa Yamazaki
  • Patent number: 9684277
    Abstract: Provided are a process cartridge and an image-forming method each of which has a satisfactory cleaning property even at the initial stage of the use of a brand-new process cartridge or electrophotographic apparatus, and hence can suppress a reduction in image quality due to the contamination of a charging member. The charge transporting layer of an electrophotographic photosensitive member contains a specific polyarylate resin or polycarbonate resin, and a toner contains a specific fine particle on the surface of a toner particle.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: June 20, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuki Yamamoto, Atsushi Okuda, Yuka Ishiduka, Shuhei Moribe, Koji Nishikawa
  • Patent number: 9606462
    Abstract: To provide a toner from which an image having a stable image density can be obtained with reduced occurrence of pollution of members, even when a toner container is filled with a larger amount of toner than a conventional amount for long-term use. A toner including a toner particle and an external additive containing an organic-inorganic composite fine particle and an inorganic fine particle A; wherein the organic-inorganic composite fine particle includes a resin particle and an inorganic fine particle B, the resin particle has a surface with a convex derived from the inorganic fine particle B; has a specific number average particle diameter (D1) and a specific shape factor SF-2; and has a specific fixed state to the toner particle; the organic-inorganic composite fine particle has a specific unit diffusion index on the toner particle surface; the inorganic fine particle A has a specific BET specific surface area.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: March 28, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shotaro Nomura, Koji Nishikawa, Kosuke Fukudome, Daisuke Yoshiba, Shohei Tsuda, Hiroki Akiyama, Katsuhisa Yamazaki