Patents by Inventor Touru Mizuno

Touru Mizuno 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).

  • Method of and apparatus for optically checking the appearances of chip-type components and sorting the chip-type components
    Patent number: 4976356
    Abstract: A method of optically checking the appearances of chips and sorting the chips comprises the steps of feeding chips onto chip-passage body to cause the chips to run on the chip-passage body in a predetermined direction; during the running of the chips on the chip-passage body, individually separating the chips to stop the chips one by one at each of two predetermined checking positions; irradiating light obliquely and straightly with respect to a chip at one of the predetermined checking positions to pick up an optical image of one of undersurface and top surface sides of the chip as a video signal by means of a first TV camera; irradiating light obliquely and straightly with respect to the chip at the other of the predetermined checking positions to pick up an optical image of the other of the undersurface and top surface sides of the chip as a video signal by means of a second TV camera; sending the video signals to image processing sections, each of which includes at least an analog-to-digital conversion un
    Type: Grant
    Filed: February 28, 1989
    Date of Patent: December 11, 1990
    Assignee: TDK Corporation
    Inventors: Touru Mizuno, Yasuhiko Kitajima