Patents by Inventor Izumi Egashira

Izumi Egashira 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: 8711543
    Abstract: Provided is an electrifying roller which may be used in a contact electrification method, which may be manufactured more easily, and which may better prevent problems caused by an electrically conductive material.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: April 29, 2014
    Assignee: Bridgestone Corporation
    Inventors: Junichi Takano, Hirotaka Tagawa, Izumi Egashira, Daijirou Sirakura
  • Patent number: 8642148
    Abstract: Provided is an electrifying roller which is manufactured more easily, and has a good electrical conduction property with a small amount of electrically conductive material. Provided are electrifying rollers (10, 20) comprising a shaft 1, an elastic layer 2 formed on the periphery of the shaft 1, and a surface layer 3 formed on the periphery surface of the elastic layer 2, wherein the elastic layer 2 is formed by an ultraviolet curing resin having a phosphoester group. It is preferred that the ultraviolet curing resin be made of a compound represented by the following Formula (1): (wherein R1 is represented by the following Formula (2): (CH2)m??(2) (where m is an integer from 1 to 10), R2 is represented by any one of the following Formulae (3) to (9): R3 is represented by any one of the following Formulae (10) to (12): (where r, s and t are an integer from 10 to 150), and n is an integer from 1 to 10).
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: February 4, 2014
    Assignee: Bridgestone Corporation
    Inventors: Izumi Egashira, Hirotaka Tagawa, Junichi Takano, Daijirou Sirakura
  • Publication number: 20120129666
    Abstract: Provided is an electrifying roller which is manufactured more easily, and has a good electrical conduction property with a small amount of electrically conductive material. Provided are electrifying rollers (10, 20) comprising a shaft 1, an elastic layer 2 formed on the periphery of the shaft 1, and a surface layer 3 formed on the periphery surface of the elastic layer 2, wherein the elastic layer 2 is formed by an ultraviolet curing resin having a phosphoester group. It is preferred that the ultraviolet curing resin be made of a compound represented by the following Formula (1): (wherein R1 is represented by the following Formula (2): ?CH2?m??(2) (where m is an integer from 1 to 10), R2 is represented by any one of the following Formulae (3) to (9): R3 is represented by any one of the following Formulae (10) to (12): (where r, s and t are an integer from 10 to 150), and n is an integer from 1 to 10).
    Type: Application
    Filed: August 24, 2009
    Publication date: May 24, 2012
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Izumi Egashira, Hirotaka Tagawa, Junichi Takano, Daijirou Sirakura
  • Publication number: 20110249372
    Abstract: Provided is an electrifying roller which may be used in a contact electrification method, which may be manufactured more easily, and which may better prevent problems caused by an electrically conductive material. Provided is an electrifying roller (10), (20) of the present invention has a shaft (1), an elastic layer (2) formed on the periphery of the shaft (1), and a surface layer (3) formed on the periphery surface of the elastic layer (2), wherein the elastic layer (2) is formed by an ultraviolet curing resin, and the surface layer is formed by a heat curing resin. it is preferred that the thickness of said elastic layer (2) be 0.9 to 1.3 mm and that the shaft (1) be a hollow cylinder or solid cylinder made of metal.
    Type: Application
    Filed: August 24, 2009
    Publication date: October 13, 2011
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Junichi Takano, Hirotaka Tagawa, Izumi Egashira, Daijirou Sirakura
  • Publication number: 20110206414
    Abstract: Provided are a method of manufacturing an electrifying roller in which a highly precise electrifying roller can be manufactured at a low cost and with more ease and an electrifying roller manufactured by the method.
    Type: Application
    Filed: August 24, 2009
    Publication date: August 25, 2011
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Hirotaka Tagawa, Junichi Takano, Izumi Egashira, Daijirou Sirakura