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:
Oct. 31, 2006
Filed:
Jun. 30, 2004
James L. Bush, Iii, Lexington, KY (US);
Marenz S. Ganadillo, Lexington, KY (US);
Tommy O. Lowe, Lexington, KY (US);
Bryan D. Mckinley, Lexington, KY (US);
Douglas L. Robertson, Lexington, KY (US);
James L. Bush, III, Lexington, KY (US);
Marenz S. Ganadillo, Lexington, KY (US);
Tommy O. Lowe, Lexington, KY (US);
Bryan D. McKinley, Lexington, KY (US);
Douglas L. Robertson, Lexington, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
The invention provides a system and method for detecting the presence of an ink jet printhead when a printhead controller fails to properly identify an installed printhead using a printhead identification device. The system includes a printhead including heater resistors and control elements, and a controller connected to the printhead via address and data lines. When the controller fails to properly identify an installed printhead, the controller operates to bias the control elements in a predetermined manner via at least one address line, detect a signal via the data lines, and generate a signal indicative of the presence of the installed printhead.