Patents by Inventor Koichi Yonezawa

Koichi Yonezawa 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).

  • Image reader including plural light stopping plates with apertures
    Patent number: 5142138
    Abstract: An image reader of the present invention is provided with a plurality of photosensitive elements arranged one-dimensionally or two-dimensionally substantially in parallel with an image bearing member, and first and second stopping plates each of which has apertures at positions corresponding to the photosensitive elements, respectively, between the image bearing member and the photosensitive elements. The apertures of the second stopping plate are smaller in size than photosensitive surfaces of the photosensitive elements. The dimension of the apertures, the dimension of the photosensitive surfaces of the photosensitive elements and the distances between the first stopping plate, the second stopping plate and the photosensitive elements are set in a predetermined relation. This prevents the influence of the deviation of a mounting position of the photosensitive elements on a measuring error.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: August 25, 1992
    Assignee: Toray Industries Inc.
    Inventors: Koichi Yonezawa, Michio Ito