Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Reexamination Certificate
2011-06-28
2011-06-28
Stephens, Juanita D (Department: 2853)
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
C347S049000, C347S086000
Reexamination Certificate
active
07967425
ABSTRACT:
A printhead assembly with a printhead and a shut off (138) valve that has a valve body (200) defining an ink inlet (202) for connection to an ink supply, an ink outlet (67) connected to the printhead IC. A diaphragm (212) is biased into sealing engagement with the valve seat (216) to provide a fluid seal between the ink inlet and the ink outlet. An actuator (204) unseals the diaphragm from the valve seat when energized. The valve protects the ink in the ink supply from contaminants that can migrate up the ink line during shut down periods. The diaphragm is biased to a closed position and so seals the ink supply from the printhead as a default condition even in the event of a power failure. The bias is strong enough to provide the fluid seal so that the seal is not compromised when the pressure difference between the inlet and the outlet is small.
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Abraham Nicholas Kenneth
Dyer Geoffrey Philip
Jensen David William
Silverbrook Kia
Tow Gregory Michael
Silverbrook Research Pty Ltd
Stephens Juanita D
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