The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 2010
Filed:
Aug. 31, 2006
Daniel R. Klemer, Lexington, KY (US);
Craig P. Bush, Lexington, KY (US);
Martin C. Klement, Lexington, KY (US);
David J. Mickan, Lexington, KY (US);
Wilson M. Routt, Jr., Lexington, KY (US);
Eric W. Westerfield, Versailles, KY (US);
Daniel R. Klemer, Lexington, KY (US);
Craig P. Bush, Lexington, KY (US);
Martin C. Klement, Lexington, KY (US);
David J. Mickan, Lexington, KY (US);
Wilson M. Routt, Jr., Lexington, KY (US);
Eric W. Westerfield, Versailles, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
Methods and apparatus include improving print quality of a bi-directionally scanning electrophotographic (EP) device, such as a laser printer or copy machine, according to ambient pressure in which operated. A moving galvanometer or oscillator reflects a laser beam to create scan lines of a latent image in opposite directions. A damping of the motion occurs per air density implicated by temperature and pressure, where the pressure changes occurring especially from altitude changes. During use, a drive signal, such as a pulse train, moves the galvanometer or oscillator at or near its resonant frequency. Based on a parameter of the drive signal, such as pulse width, the ambient pressure can be made known. In general, a high-pressure environment requires a relatively longer pulse width to resonate the galvanometer or oscillator in comparison to a shorter pulse width for a low-pressure environment. Corrections to print quality stem from the determined ambient pressure.