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. 24, 2011
Filed:
Oct. 10, 2006
John Robert Sheahan, Balmain, AU;
Mark Jackson Pulver, Balmain, AU;
Brian Christopher Morahan, Balmain, AU;
Alireza Moini, Balmain, AU;
Timothy Peter Gillespie, Balmain, AU;
Michael John Webb, Balmain, AU;
Kia Silverbrook, Balmain, AU;
John Robert Sheahan, Balmain, AU;
Mark Jackson Pulver, Balmain, AU;
Brian Christopher Morahan, Balmain, AU;
Alireza Moini, Balmain, AU;
Timothy Peter Gillespie, Balmain, AU;
Michael John Webb, Balmain, AU;
Kia Silverbrook, Balmain, AU;
Silverbrook Research Pty Ltd, Balmain, New South Wales, AU;
Abstract
A printhead IC comprising: an array of nozzles; an ejection actuator corresponding to each of the nozzles respectively, the ejection actuator having a resistive heater that is activated when the actuator ejects ink through the corresponding nozzle; drive circuitry for receiving print data and activating the actuators with drive signals in accordance with the print data; and, open actuator test circuitry for selectively disabling the actuators when they receive a drive signal while comparing the resistance of the resistive heater to a predetermined threshold to assess whether the actuator is defective.