Patents by Inventor Andrew George Prax

Andrew George Prax 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: 6950253
    Abstract: A magnetic printing apparatus includes a dipole magnet that supplies a magnetic field to a magnetic media, a holder for holding the magnetic media, a set of stampers with servo patterns and a press for pressing the magnetic media firmly against the stampers while the magnetic media and stampers are being exposed to a magnetic field and a set of elastomer pads to distribute and equalize the force of the press on the magnetic media. Servo formatting, using the contact magnetic printing apparatus, is done by positioning the magnetic media against the stampers. A force is then applied to the magnetic media and stamper so that the two are in firm contact with each other. A sequence of magnetic fields is then applied to the stampers and magnetic media which duplicates the servo patterns of the stamper onto the magnetic media.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: September 27, 2005
    Assignee: Seagate Technology LLC
    Inventors: Li-Ping Wang, Andrew George Prax, David Shaio-Min Kuo
  • Publication number: 20030133211
    Abstract: A system and method for servo formatting magnetic media using contact magnetic printing is disclosed. The apparatus includes a dipole magnet that supplies a magnetic field to a magnetic media, a holder for holding the magnetic media, a set of stampers with servo patterns and a press for pressing the magnetic media firmly against the stampers while the magnetic media and stampers are being exposed to a magnetic field and a set of elastomer pads to distribute and equalize the force of the press on the magnetic media. Servo formatting, using the contact magnetic printing apparatus, is done by first positioning the magnetic media against the stampers having servo patterns on them. The magnetic media/stampers stack are then loaded and aligned in a system for contact magnetic printing, applying a force on the magnetic media and stamper so that the two are in firm contact with each other.
    Type: Application
    Filed: September 30, 2002
    Publication date: July 17, 2003
    Inventors: Li-Ping Wang, Andrew George Prax, David Shaio-Min Kuo