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:
Feb. 17, 1998
Filed:
Jan. 20, 1995
David E Hackleman, Monmouth, OR (US);
William A Buskirk, Albany, OR (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A page-wide-array ('PWA') inkjet printer includes a printer element defining a printhead with thousands of nozzles spanning a pagewidth. A media sheet travels along a media path adjacent to the printhead to receive character or graphic markings. Typically, a media sheet accelerates from rest to a constant velocity. To optimize print speed nozzle timing is controlled to respond to changes in media velocity. Printing occurs while the media is accelerating and while traveling at a constant velocity. A sensor positioned in fixed relation to a PWA printer element detects the media's actual velocity. Actual velocity is fed back to a printhead controller which compares actual velocity to a rated constant velocity. If actual velocity is slower than the rated velocity, then nozzle timing is adjusted to be slower than a rated timing. If actual velocity is faster than rated velocity, then nozzle timing is adjusted to be faster than the rated timing.