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:
Jul. 12, 2011
Filed:
Dec. 31, 2008
Bruce David Gibson, Lexington, KY (US);
Shirish Padmakar Mulay, Lexington, KY (US);
Nicholas Jon Post, Lexington, KY (US);
Ramkumar Singh Sankar Singh, Lexington, KY (US);
Bruce David Gibson, Lexington, KY (US);
Shirish Padmakar Mulay, Lexington, KY (US);
Nicholas Jon Post, Lexington, KY (US);
Ramkumar Singh Sankar Singh, Lexington, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
A method for determining the pulse width for driving printhead nozzles in a thermal inkjet printer. The printhead is preheated to a desired temperature during a maintenance mode. The printhead nozzle heaters are successively driven in respective heating intervals, where each successive heating interval is characterized by shorter drive pulse width pulses occurring at a higher pulse frequency. The printhead temperature data received during each heating interval is processed to determine a respective temperature slope. The temperature slopes are compared to a desired threshold temperature slope, and when a match is found, the pulse width associated with the matched temperature slope is used to drive the nozzle heaters during subsequent printer operations to print characters on a print medium.