1
Donald B MacLane, Ted E Deur, Jeffrey J Anderson, Donald R Titterington, James C Oswald, Richard S Meissner: Ink jet print head maintenance system. Tektronix, John D Winkelman, Mark M Meininger, February 2, 1993: US05184147 (57 worldwide citation)

An ink jet print head cleaning and maintenance system has a purge chamber for applying a vacuum to a nozzle orifice surface. A specialized baffle diverts ink entering the purge chamber away a vent port through which the vacuum is drawn. An elongated wipe engages and wipes the orifice surface and is ...


2
Guenther W Wimmer, Richard S Meissner, David L Knierim: Ink level sensor. Tektronix, Ralph D Alessandro, Charles F Moore, Michael L Levine, November 18, 1997: US05689288 (45 worldwide citation)

A flexible bar connected to an actuator is suspended within an ink reservoir. The bar is preferably mounted in a cantilever or free-standing mode and vibrates in response to signals from the actuator. When the actuator signals are discontinued the bar continues to vibrate and causes the actuator to ...