SENSING SYSTEM FOR DETECTING FAILED JETS ON INK JET DEVICES
Original Publication Date: 1998-Oct-31
Included in the Prior Art Database: 2004-Apr-08
Xerox Disclosure Journal
Thermal ink jet printers typically use large arrays of jets or nozzles linearly aligned in a printhead face to eject ink droplets onto a recording medium. A persistent problem for a printing system is the failure of one or more jets to eject ink in proper alignment or to eject ink at all. Figures 1-3 show an optical scanning device which enables a printer in an automated mode to determine which jets in a larger array of jets are either not printing or are expelling misdirected droplets.