Patents by Inventor Asae Kamata

Asae Kamata 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).

  • Fixing belt, fixing device, and image forming apparatus
    Patent number: 10877413
    Abstract: A fixing belt includes a polyimide layer. The polyimide layer includes polyimide and an aprotic solvent. The solvent has a boiling point not lower than 230° C. and a solubility parameter not less than 24.5 (J/cm3)1/2 and not greater than 30.7 (J/cm3)1/2. The solvent has a content not less than 0.1 ppm and not greater than 1000 ppm in the polyimide layer.
    Type: Grant
    Filed: May 20, 2020
    Date of Patent: December 29, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroya Abe, Atsuo Hirai, Asae Kamata, Yasuhide Fujiwara
  • FIXING BELT, FIXING DEVICE, AND IMAGE FORMING APPARATUS
    Publication number: 20200387098
    Abstract: A fixing belt includes a polyimide layer. The polyimide layer includes polyimide and an aprotic solvent. The solvent has a boiling point not lower than 230° C. and a solubility parameter not less than 24.5 (J/cm3)1/2 and not greater than 30.7 (J/cm3)1/2. The solvent has a content not less than 0.1 ppm and not greater than 1000 ppm in the polyimide layer.
    Type: Application
    Filed: May 20, 2020
    Publication date: December 10, 2020
    Inventors: Hiroya ABE, Atsuo Hirai, Asae Kamata, Yasuhide Fujiwara
  • Polyimide seamless belt for image forming apparatus
    Patent number: 9342007
    Abstract: A polyimide seamless belt for an image forming apparatus, which contains: polyimide containing a segment derived from aromatic diamine, and a segment derived from aromatic tetracarboxylic acid; and two types of carbon black, which are high-structure carbon black capable of imparting high conductivity, and acidic carbon black, where the two types of the carbon black are dispersed in the polyimide seamless belt, wherein the polyimide seamless belt has surface resistivity of 108?/? or less.
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: May 17, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Sachiko Takeda, Shigeru Hashiura, Kenji Ohta, Asae Kamata
  • POLYIMIDE SEAMLESS BELT FOR IMAGE FORMING APPARATUS
    Publication number: 20160041513
    Abstract: A polyimide seamless belt for an image forming apparatus, which contains: polyimide containing a segment derived from aromatic diamine, and a segment derived from aromatic tetracarboxylic acid; and two types of carbon black, which are high-structure carbon black capable of imparting high conductivity, and acidic carbon black, where the two types of the carbon black are dispersed in the polyimide seamless belt, wherein the polyimide seamless belt has surface resistivity of 108?/? or less.
    Type: Application
    Filed: August 6, 2015
    Publication date: February 11, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Sachiko Takeda, Shigeru Hashiura, Kenji Ohta, Asae Kamata