Patents by Inventor Tsuneyoshi Tominaga

Tsuneyoshi Tominaga 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: 8383313
    Abstract: Provided is a toner including toner particles each containing a binder resin, a colorant, and a wax, and inorganic fine particles, the toner having such a characteristic that a temperature-storage elastic modulus curve at a high frequency shows a characteristic change in its behavior in a specific temperature region with respect to a temperature-storage elastic modulus curve at a low frequency.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: February 26, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasukazu Ayaki, Tsuneyoshi Tominaga
  • Patent number: 8372573
    Abstract: A toner in which, in a loss tangent (tan ?) curve obtained by a dynamic viscoelasticity test, the tan ? shows a maximal value ?a in the temperature region of 28.0-60.0° C., which maximal value ?a is 0.50 or more, and shows a minimal value ?b in the temperature region of 45.0-85.0° C., which minimal value ?b is 0.60 or less, where the difference between the maximal value ?a and the minimal value ?b is 0.20 or more; and, where the temperature that affords the maximal value ?a is represented by Ta (° C.) and the temperature that affords the minimal value ?b is represented by Tb (° C.), the difference between the Ta and the Tb is 5.0-45.0° C.; and the toner having, in a storage elastic modulus (G?) curve obtained by the dynamic viscoelasticity test, a value G?a of a storage elastic modulus at the Ta, of 1.00×106-5.00×107 Pa.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: February 12, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasukazu Ayaki, Atsushi Tani, Tsuneyoshi Tominaga
  • Publication number: 20120171608
    Abstract: A toner in which, in a loss tangent (tan ?) curve obtained by a dynamic viscoelasticity test, the tan ? shows a maximal value ?a in the temperature region of 28.0-60.0° C., which maximal value ?a is 0.50 or more, and shows a minimal value ?b in the temperature region of 45.0-85.0° C., which minimal value ?b is 0.60 or less, where the difference between the maximal value ?a and the minimal value ?b is 0.20 or more; and, where the temperature that affords the maximal value ?a is represented by Ta(° C.) and the temperature that affords the minimal value ?b is represented by Tb(° C.), the difference between the Ta and the Tb is 5.0-45.0° C.; and the toner having, in a storage elastic modulus (G?) curve obtained by the dynamic viscoelasticity test, a value G?a of a storage elastic modulus at the Ta, of 1.00×106-5.00×107 Pa.
    Type: Application
    Filed: March 19, 2012
    Publication date: July 5, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yasukazu Ayaki, Atsushi Tani, Tsuneyoshi Tominaga
  • Publication number: 20120171607
    Abstract: Toner characterized in that assuming that the glass transition point of the toner measured by a differential scanning calorimeter (DSC) is represented by T1(° C.), in a micro compression test at T1?10 (° C.), when a load from 0.00N (0.00 mgf) to 7.85×10?4 N (80.00 mgf) is applied at the intervals of 7.85×10?7 N (0.08 mgf) to a single particle of the toner, the strain value A80a(%) at 7.85×10?4 N is 35.0 to 75.0%; and in a load (x-axis)-strain (y-axis) curve obtained by the micro compression test, the ratio of an area (S1a) of a specific region, relative to an area (S2a) of a specific region, (S1a/S2a), is 1.5 to 3.5.
    Type: Application
    Filed: March 13, 2012
    Publication date: July 5, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yasukazu Ayaki, Atsushi Tani, Tsuneyoshi Tominaga
  • Publication number: 20110305984
    Abstract: A toner having a toner particle including a core particle obtained by polymerizing a polymerizable monomer composition containing at least a polymerizable monomer, a colorant, a release agent, a polar resin, and a crystalline polyester in an aqueous medium and an outer shell formed by fixing resin fine particles to the surface of the core particle, wherein the resin constituting the resin fine particles is an amorphous resin and the acid value of the resin fine particles is 4.0 to 50.0 mgKOH/g.
    Type: Application
    Filed: June 9, 2011
    Publication date: December 15, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tsuneyoshi Tominaga, Ryoichi Fujita, Tsutomu Shimano
  • Publication number: 20110081609
    Abstract: Provided is a toner including toner particles each containing a hinder resin, a colorant, and a wax, and inorganic fine particles, the toner having such a characteristic that a temperature-storage elastic modulus curve at a high frequency shows a characteristic change in its behavior in a specific temperature region with respect to a temperature-storage elastic modulus curve at a low frequency.
    Type: Application
    Filed: December 3, 2010
    Publication date: April 7, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yasukazu Ayaki, Tsuneyoshi Tominaga
  • Patent number: 7858282
    Abstract: Provided is a toner including toner particles each containing a binder resin, a colorant, and a wax, and inorganic fine particles, the toner having such a characteristic that a temperature-storage elastic modulus curve at a high frequency shows a characteristic change in its behavior in a specific temperature region with respect to a temperature-storage elastic modulus curve at a low frequency.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: December 28, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasukazu Ayaki, Tsuneyoshi Tominaga
  • Publication number: 20100143834
    Abstract: Provided is a toner including toner particles each containing a binder resin, a colorant, and a wax, and inorganic fine particles, the toner having such a characteristic that a temperature-storage elastic modulus curve at a high frequency shows a characteristic change in its behavior in a specific temperature region with respect to a temperature-storage elastic modulus curve at a low frequency.
    Type: Application
    Filed: February 17, 2010
    Publication date: June 10, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yasukazu Ayaki, Tsuneyoshi Tominaga
  • Publication number: 20090291383
    Abstract: Toner characterized in that assuming that the glass transition point of the toner measured by a differential scanning calorimeter (DSC) is represented by T1 (° C.), in a micro compression test at T1?10 (° C.), when a load from 0.00 N (0.00 mgf) to 7.85×10?4 N (80.00 mgf) is applied at the intervals of 7.85×10?7 N (0.08 mgf) to a single particle of the toner, the strain value A80a (%) at 7.85×10?4 N is 35.0 to 75.0%; and in a load (x-axis)-strain (y-axis) curve obtained by the micro compression test, the ratio of an area (S1a) of a specific region, relative to an area (S2a) of a specific region, (S1a/S2a), is 1.5 to 3.5.
    Type: Application
    Filed: July 29, 2009
    Publication date: November 26, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yasukazu Ayaki, Atsushi Tani, Tsuneyoshi Tominaga
  • Publication number: 20090291380
    Abstract: A toner in which, in a loss tangent (tan ?) curve obtained by a dynamic viscoelasticity test, the tan ? shows a maximal value ?a in the temperature region of 28.0-60.0° C., which maximal value ?a is 0.50 or more, and shows a minimal value ?b in the temperature region of 45.0-85.0° C., which minimal value ?b is 0.60 or less, where the difference between the maximal value ?a and the minimal value ?b is 0.20 or more; and, where the temperature that affords the maximal value ?a is represented by Ta(° C.) and the temperature that affords the minimal value ?b is represented by Tb(° C.), the difference between the Ta and the Tb is 5.0-45.0° C.; and the toner having, in a storage elastic modulus (G?) curve obtained by the dynamic viscoelasticity test, a value G?a of a storage elastic modulus at the Ta, of 1.00×106-5.00×107 Pa.
    Type: Application
    Filed: July 29, 2009
    Publication date: November 26, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yasukazu Ayaki, Atsushi Tani, Tsuneyoshi Tominaga