Patents by Inventor Kozo Ezaki

Kozo Ezaki 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).

  • Apparatus for manufacturing optical information recording medium
    Patent number: 4907956
    Abstract: A disk substrate is supported by a support base formed on a center pin which is vertically movable on a selective basis, a table is set below the disk substrate, and a stamper is positioned on the table by means of a guide ring or the like. A ring-shaped portion of resin which is cured upon radiation of ultraviolet rays is set on the stamper. The center pin is then caused to descend by means of a drive mechanism, to a first position, at which position the disk substrate is on the point of contact with the resin. Then, the disk substrate is caused to descend intermittently in units of very small amounts, to a second position, at which position the entire periphery of the ring-like resin is brought into contact with the disk substrate.
    Type: Grant
    Filed: April 26, 1989
    Date of Patent: March 13, 1990
    Assignees: Dainippon Ink and Chemicals, Inc., Global Machinery Co., Ltd.
    Inventors: Kozo Ezaki, Sadaaki Shigeta, Kazunari Sakai, Noboru Murakami, Yasuyuki Tsuchiya, Yuichi Fujita