Patents by Inventor Simpei Miyagawa

Simpei Miyagawa 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).

  • Blade member and cleaning blade
    Patent number: 9164467
    Abstract: A blade member 1 is used for removal of residual toner 5 remaining on a surface of a counterpart member 4 in an image forming device employing an electrophotographic system, by sliding contact with the counterpart member 4. The blade member 1 includes a blade body 11 made of a polyurethane rubber using diphenylmethane diisocyanate and a polyester polyol as main raw materials, and a film 12 that covers at least a surface of a sliding contact portion of the blade body 11 to contact with the counterpart member 4. The polyurethane rubber has an international rubber hardness degree of 65 to 85 IRHD, a tan ? peak temperature of 8° C. or lower, and a tan ? peak value of 1.1 or less. The film 12 contains a hydrocarbon polymer as a main component.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: October 20, 2015
    Assignee: SUMITOMO RIKO COMPANY LIMITED
    Inventors: Hiroyuki Mori, Simpei Miyagawa, Yasunori Nimura, Katsumi Okashita, Shota Hayashi
  • BLADE MEMBER AND CLEANING BLADE
    Publication number: 20150227106
    Abstract: A blade member 1 is used for removal of residual toner 5 remaining on a surface of a counterpart member 4 in an image forming device employing an electrophotographic system, by sliding contact with the counterpart member 4. The blade member 1 includes a blade body 11 made of a polyurethane rubber using diphenylmethane diisocyanate and a polyester polyol as main raw materials, and a film 12 that covers at least a surface of a sliding contact portion of the blade body 11 to contact with the counterpart member 4. The polyurethane rubber has an international rubber hardness degree of 65 to 85 IRHD, a tan ? peak temperature of 8° C. or lower, and a tan ? peak value of 1.1 or less. The film 12 contains a hydrocarbon polymer as a main component.
    Type: Application
    Filed: April 22, 2015
    Publication date: August 13, 2015
    Applicant: SUMITOMO RIKO COMPANY LIMITED
    Inventors: Hiroyuki Mori, Simpei Miyagawa, Yasunori Nimura, Katsumi Okashita, Shota Hayashi