B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
183/1
B01D 19/00 (2006.01) B41J 2/19 (2006.01) G01D 15/16 (2006.01)
Patent
CA 1304009
Deaeration of Ink in an Ink Jet System Abstract An object of the invention is to provide a new and improved method and apparatus for eliminating dissolved air from ink in an ink jet system which overcomes the above-mentioned disadvantages of the prior art. Another object of the invention is to provide a system for deaerating ink in an ink jet system and for purging any air bubbles which have been formed in the ink jet head. In the ink deaerator described in the specification, an elongated ink path (27) leading to an ink jet head (11) is formed between two permeable membranes (30, 31). The membranes (30, 31) are backed by air plenums (32, 33) which contain support members (34) to hold the membranes in position. Reduced pressure is applied to the plenums to extract dissolved air from the ink in the ink path (27). Increased pressure can also be applied to the plenums (32,33) to eject ink from the ink jet head (11) for purging. Within the ink jet head ink is circulated convectively from the orifice (35) to the deaerating path (27) even when the jet is not jetting ink.
563250
Hine Nathan P.
Hoisington Paul A.
Spehrley Charles W. Jr.
Dimatix Inc.
Gowling Lafleur Henderson Llp
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