Aspirated Ink Jet Head Design
Original Publication Date: 1981-Sep-01
Included in the Prior Art Database: 2005-Feb-12
In aspirated ink jet printing, moving air is cause to surround and flow in substantially the same direction as the ink stream. The moving air greatly reduces the aerodynamic interaction between drops and thereby permits simpler drop placement algorithms, yields higher throughput by eliminating the need for guard drops, and makes possible superior print quality by inhibiting the necessity for merged drop pairs. The head design described hereinafter permits more predictable orientation of the ink stream when air flows through the aspirator tunnel by providing for a double-flared deflection electrode, and by providing a flat air reentrance surface, makes ink stream viewing at the charge electrode simpler.