Ink Stream Drift Compensation in Aspirated Ink Jet Printers
Original Publication Date: 1981-Aug-01
Included in the Prior Art Database: 2005-Feb-12
In an ink jet printer of the aspirated type, air moves colinearly with the ink stream to reduce the requirements for aerodynamic corrections on the ink drops. When the air in an aspirator is turned on, it typically produces an aerodynamic interaction with the stream which results in the lateral deflection of the stream position. This deflection of the stream from its position with the air off to its position with the air on is referred to as stream drift and causes problems with stream alignment and servoing. Stream drift makes it difficult to keep the stream in the gutter and in the depth of field of an optical drop detector (neither of which is shown in the drawing).