Patents by Inventor Jyunichi Matsumoto

Jyunichi Matsumoto 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).

  • Developing apparatus for image forming apparatus
    Publication number: 20050095037
    Abstract: A developing apparatus which uses a two-component developer consisting of a toner and carrier. The ratio between the amount of the developer M1 which is drawn onto a developing slave and refluxes while being regulated by a doctor blade, and the amount of the developer (drawn amount) M2 which passes through the doctor blade is M1/M2<10. The toner is a negatively-charged toner. In a charge amount distribution the number of toners of ?1 fc/10 ?m or more is 20% or less of the total number of toners.
    Type: Application
    Filed: September 15, 2004
    Publication date: May 5, 2005
    Inventors: Takayuki Koike, Nobutaka Takeuchi, Nobuo Iwata, Satoshi Muramatsu, Jyunichi Matsumoto