Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Patent
1998-04-30
2000-09-19
Le, N.
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
B41J 219
Patent
active
061201391
ABSTRACT:
Disclosed is a printing device that overcomes the thermal problems of previous printheads caused by heat generation by providing better cooling of the printhead,avoids bubble accumulation near the printhead which can starve the printhead of ink and provides sufficient volume for air accumulation away from the printhead. The printing device including an outer housing, a substrate having a front surface on which is formed ink ejection chambers and having a back surface, an ink conduit having a distal end proximate to the back surface of the substrate, the ink conduit, the outer housing and the substrate defining an ink flow path to the ink ejection chambers and a bubble accumulation chamber in communication with the ink flow path such that bouyancy will tend to move bubbles that accumulate in the ink flow path into the bubble accumulation chamber.
REFERENCES:
patent: 4015272 (1977-03-01), Yamamori et al.
patent: 5278584 (1994-01-01), Keefe et al.
patent: 5815185 (1998-09-01), Pietrzyk
Childers Winthrop
Pietrzyk Joe R.
Wade John
Hewlett--Packard Company
Le N.
Nghiem Michael
Stenstrom Dennis G.
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