Dispensing – Cutoff operated by selectively preset volume or rate of... – Cutoff by single trapped volume
Reexamination Certificate
2011-04-05
2011-04-05
Luu, Matthew (Department: 2861)
Dispensing
Cutoff operated by selectively preset volume or rate of...
Cutoff by single trapped volume
C222S014000
Reexamination Certificate
active
07918366
ABSTRACT:
A printhead includes a chamber layer and at least two orifice layers. A first orifice layer is disposed on the chamber layer, and a second orifice layer is disposed on the first orifice layer. The second orifice layer has at least one counterbore formed therein. A first nozzle is formed through both orifice layers and produces droplets of a first drop weight. A second nozzle is formed through the first orifice layer, coincident with the counterbore, and produces droplets of a second drop weight that is different than the first drop weight. In one embodiment, the printhead is used in a stand-alone fluid-dispensing device.
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Pending U.S. Appl. No. 11/495,241, Jeremy Harlan Donaldson et al., filed Jul. 28, 2006.
Nielsen Jeffrey A.
Olbrich Craig A.
Hewlett--Packard Development Company, L.P.
Liu Kendrick X
Luu Matthew
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