Patents by Inventor Rulon Gregory Esplin

Rulon Gregory Esplin 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).

  • Scanning system
    Patent number: 7061514
    Abstract: According to one embodiment, a scanning system includes a first light source configured to emit a first light beam, a second light source configured to emit a second light beam, a first sensor configured to detect a position of at least one of the first and the second light beams with respect to a photoconductor, a second sensor configured to provide positional information of a transfer system, and a control system coupled with the first sensor and the second sensor and configured to select one of the first light source and the second light source to form a first scan line of a latent image on the photoconductor responsive to output of the first sensor and the second sensor.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: June 13, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Andrew LeVake, Rulon Gregory Esplin, Jeffrey L. Trask
  • Method and apparatus for alignment of image planes
    Patent number: 6573919
    Abstract: An alignment apparatus for use in an electrophotographic imaging device includes a first counter to count a first value of changes of a first signal, with the first value related to a first location of a photoconductor in a first direction. In addition, the alignment apparatus includes a second counter to count a second value of changes of a second signal, with the second value related to a second location of the photoconductor in a second direction substantially perpendicular to the first direction. Additionally, the alignment apparatus includes a circuit coupled to the first and the second counter to generate a change in a third signal after the first and the second counter count to, respectively, the first value and the second value.
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: June 3, 2003
    Assignee: Hewlett-Packard Development Company L.P.
    Inventors: Richard Benear, Rulon Gregory Esplin
  • Method and apparatus for alignment of image planes
    Publication number: 20030025778
    Abstract: An alignment apparatus for use in an electrophotographic imaging device includes a first counter to count a first value of changes of a first signal, with the first value related to a first location of a photoconductor in a first direction. In addition, the alignment apparatus includes a second counter to count a second value of changes of a second signal, with the second value related to a second location of the photoconductor in a second direction substantially perpendicular to the first direction. Additionally, the alignment apparatus includes a circuit coupled to the first and the second counter to generate a change in a third signal after the first and the second counter count to, respectively, the first value and the second value.
    Type: Application
    Filed: July 31, 2001
    Publication date: February 6, 2003
    Inventors: Richard Benear, Rulon Gregory Esplin