Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2011-01-25
2011-01-25
Stephens, Juanita D (Department: 2853)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S054000, C347S043000, C347S040000
Reexamination Certificate
active
07874641
ABSTRACT:
A modular printhead assembly includes a substrate member. A plurality of printhead modules is fastened to the substrate member. Each printhead module includes a layered structure through which at least differently colored inks are fed. The layered structure has at least a lower layer, a middle layer and a top layer, with the lower layer defining a number of channels in fluid communication with respective ink supplies, the middle layer defining a number of openings in fluid communication with the channels, and the top layer defining a number of channels on a bottom side and openings in a top side in fluid communication with the channels. A micro-electromechanical printhead integrated circuit is mounted on the layered structure. The printhead integrated circuit has a plurality of micro-electromechanical nozzles arranged on a silicon layer. The silicon layer defines a plurality of ink channels for feeding ink to the nozzles, the openings in the top layer being substantially aligned with the ink channels. An ink supply is arranged on the substrate member and is in fluid communication with the channels in the bottom layer through openings in the substrate member.
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Silverbrook Research Pty Ltd
Stephens Juanita D
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