Patents by Inventor Ritsuo Hirukawa

Ritsuo Hirukawa 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 and apparatus for screen printing
    Patent number: 8191472
    Abstract: When a printed circuit board is inspected and determined to have an insufficient amount of printing of a print pattern, the printed board is returned to a screen-printing apparatus so that a new print pattern is formed so as to overlap a previous print pattern. In the re-printing, a raising speed of the printed board at a final stage of the board raising operation is rendered lower than in the previous screen printing so that the printed board is brought into contact with the underside of the screen mask more slowly.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: June 5, 2012
    Assignee: Fuji Machine Mfg. Co., Ltd.
    Inventors: Manabu Mizuno, Ritsuo Hirukawa
  • METHOD AND APPARATUS FOR SCREEN PRINTING
    Publication number: 20110146508
    Abstract: When a printed circuit board is inspected and determined to have an insufficient amount of printing of a print pattern, the printed board is returned to a screen-printing apparatus so that a new print pattern is formed so as to overlap a previous print pattern. In the re-printing, a raising speed of the printed board at a final stage of the board raising operation is rendered lower than in the previous screen printing so that the printed board is brought into contact with the underside of the screen mask more slowly.
    Type: Application
    Filed: June 21, 2010
    Publication date: June 23, 2011
    Inventors: Manabu Mizuno, Ritsuo Hirukawa
  • Method and apparatus for screen printing
    Patent number: 7836824
    Abstract: When a printed circuit board is inspected and determined to have an insufficient amount of printing of a print pattern, the printed board is returned to a screen-printing apparatus so that a new print pattern is formed so as to overlap a previous print pattern. In the re-printing, a raising speed of the printed board at a final stage of the board raising operation is rendered lower than in the previous screen printing so that the printed board is brought into contact with the underside of the screen mask more slowly.
    Type: Grant
    Filed: March 7, 2007
    Date of Patent: November 23, 2010
    Assignee: Fuji Machine Mfg. Co., Ltd.
    Inventors: Manabu Mizuno, Ritsuo Hirukawa
  • Method and apparatus for screen printing
    Publication number: 20070214976
    Abstract: When a printed circuit board is inspected and determined to have an insufficient amount of printing of a print pattern, the printed board is returned to a screen-printing apparatus so that a new print pattern is formed so as to overlap a previous print pattern. In the re-printing, a raising speed of the printed board at a final stage of the board raising operation is rendered lower than in the previous screen printing so that the printed board is brought into contact with the underside of the screen mask more slowly.
    Type: Application
    Filed: March 7, 2007
    Publication date: September 20, 2007
    Inventors: Manabu Mizuno, Ritsuo Hirukawa