Patents by Inventor Toshinao Ishizone

Toshinao Ishizone 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: 5080993
    Abstract: The present invention relates to a method for producing a photoreceptor for electrophotography. An aluminum base substrate is worked so that the R.sub.max is between 1.3 and 1.8 microns, with a filtered maximum waviness not exceeding 0.5 microns. The substrate is etched with an aqueous solution of alkali, and then etched with an aqueous solution of nitric acid to form an oxide thin film. A Se-As alloy is vacuum deposited thereon to form a light sensitive layer. This photoreceptor is flat and smooth so that the images obtained by electrophotography are substantially free from white point defects.
    Type: Grant
    Filed: September 19, 1989
    Date of Patent: January 14, 1992
    Assignee: Fuji Electric Co. Ltd.
    Inventors: Yukihiro Maruta, Toshinao Ishizone
  • Patent number: 4936948
    Abstract: The present invention relates to a method for producing a light sensitive body for use in electronic photography copiers and printers, wherein the surface of a substrate comprising aluminum as the main constituent is made flat and smooth by mechanical processing, subjected to further etching treatment, and a light sensitive layer is formed thereon. This light sensitive body is used in connection with an optical toner concentration sensor. This toner concentration sensor, along with a toner concentration controlling mechanism, will enable copied picture images to have constant image concentration without the occurrence of base fog.
    Type: Grant
    Filed: September 13, 1989
    Date of Patent: June 26, 1990
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Yasushi Ohki, Toshinao Ishizone