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:
May. 20, 2003
Filed:
Feb. 19, 1999
Xavier Bruch, Barcelona, ES;
Xavier Girones, Tarragona, ES;
Antoni Murcia, Barcelona, ES;
Christopher Taylor, Barcelona, ES;
Ramon Vega, Barcelona, ES;
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
There is provided a method for determining the end of life of a pen having a printhead with a plurality of nozzles. The method includes performing a drop detection on the printhead to check if any nozzle of the printhead is malfunctioning and storing the result of the drop detection together with the results of previous drop detections to keep a history of the health status of each nozzle. The method also includes evaluating the history of the health status of each nozzle of the printhead, and deciding whether or not to mark the pen as an end of life pen.