Patents Assigned to Archem Inc.
  • Conductive urethane foam and toner supply roller
    Patent number: 11459440
    Abstract: An object of the present disclosure is to provide a conductive urethane foam capable of curbing changes in hardness and impact resilience thereof between prior to and after being impregnated with a binder resin, while keeping a stable charge-imparting effect thereof. To achieve the object, the present disclosure proposes a conductive urethane foam including an urethane foam substrate material having a surface layer impregnated with a binder resin containing a conducting agent: wherein the binder resin contains a silicone resin.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: October 4, 2022
    Assignee: Archem Inc.
    Inventor: Hirokazu Doi
  • Charging roller and image forming apparatus
    Patent number: 11460789
    Abstract: A charging roller comprises a shaft member, a base layer located outside in the radial direction of the shaft member, and a surface layer located outside in the radial direction of the base layer and forming a surface. The surface layer includes particles, and the ratio of the total area of the particles exposed from the surface of the surface layer in a planar view seen from the radial direction of the charging roller, with respect to the area of the surface of the surface layer is more than 60%.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: October 4, 2022
    Assignee: Archem Inc.
    Inventors: Makoto Otsuru, Kaori Okumoto