Patents by Inventor Tatsuhiko CHOKKI

Tatsuhiko CHOKKI 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).

  • Servo writer with closely spaced large-diameter tape guides supported by compressed air
    Patent number: 8611047
    Abstract: In a servo writer, a write signal generator circuit is configured to output a signal for writing a servo signal to a servo write head disposed to allow a magnetic tape to slidably contact therewith and configured to write the servo signal thereon, and a plurality of tape guides are configured to guide the magnetic tape supplied from a supply reel to the servo write head and to a take-up reel. The plurality of tape guides include a first tape guide disposed to contact with the magnetic tape at a position directly upstream of the servo write head and a second tape guide disposed to contact with the magnetic tape at a position directly downstream of the servo write head. Each of the first and second tape guides includes a guide roller rotatably supported by an air bearing and having a diameter of 19 mm or greater.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: December 17, 2013
    Assignee: FUJIFILM Corporation
    Inventors: Hiroki Ohtsu, Tatsuhiko Chokki
  • SERVO WRITER AND METHOD FOR MANUFACTURING MAGNETIC TAPE WITH SERVO SIGNAL WRITTEN THEREON
    Publication number: 20110205659
    Abstract: In a servo writer, a write signal generator circuit is configured to output a signal for writing a servo signal to a servo write head disposed to allow a magnetic tape to slidably contact therewith and configured to write the servo signal thereon, and a plurality of tape guides are configured to guide the magnetic tape supplied from a supply reel to the servo write head and to a take-up reel. The plurality of tape guides include a first tape guide disposed to contact with the magnetic tape at a position directly upstream of the servo write head and a second tape guide disposed to contact with the magnetic tape at a position directly downstream of the servo write head. Each of the first and second tape guides includes a guide roller rotatably supported by an air bearing and having a diameter of 19 mm or greater.
    Type: Application
    Filed: February 2, 2011
    Publication date: August 25, 2011
    Applicant: FUJIFILM CORPORATION
    Inventors: Hiroki OHTSU, Tatsuhiko CHOKKI