Patent Number: 6,296,350

Title: Ink jet printer having driver circuit for generating warming and firing pulses for heating elements

Abstract: An ink jet printing apparatus is provided comprising a print cartridge including at least one resistive heating element in at least one ink-containing chamber having an orifice. The apparatus further includes a driver circuit, electrically coupled to the print cartridge, for applying to the resistive heating element warming and firing pulses separated by a delay period. The warming pulse causes the resistive heating element to warm a portion of the ink adjacent to the heating element and the firing pulse causes the resistive heating element to produce a vapor bubble in the chamber which causes a droplet of ink to be ejected from the chamber orifice.

Inventors: Cornell; Robert Wilson (Lexington, KY), Gibson; Bruce David (Lexington, KY)

Assignee: Lexmark International, Inc.

International Classification: B41J 2/05 (20060101); B41J 002/05 ()

Expiration Date: 10/02/2018