Patent ID: 7901056
Filing Date: 2011-03-08
Classification: B41J

Abstract:
1. An inkjet printer comprising: a printhead with an array of ejection devices for ejecting drops of liquid onto a media substrate, each of the ejection devices having a chamber for holding liquid, a nozzle in fluid communication with the chamber and a heater positioned in the chamber for contact with the liquid such that resistive heating of the heater generates a vapor bubble that ejects a drop of the liquid through the nozzle; and a controller for receiving print data and generating drive pulses to energize the heaters in accordance with the print data, wherein the controller increases the drive pulse energy during the printhead lifetime such that the drive pulse energy is never less than that of a preceding drive pulse, and the heater is formed from a TiAlX alloy where Ti contributes more than 40% by weight, Al contributes more than 40% by weight and X contributes less than 5% by weight and comprises W and one or more of Ag, Cr, Mo, Nb, Si, and Ta,