Printhead assembly with a gas duct

Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means

Reexamination Certificate

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Reexamination Certificate

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07845774

ABSTRACT:
A printhead assembly comprising an ink distribution assembly that includes an ink distribution molding having a plurality of ducts and at least one printhead integrated circuit in fluid communication with the ink distribution assembly. The at least one printhead integrated circuit receives ink via at least some of the plurality of ducts of the distribution molding, and a gas is introduced in the vicinity of a printing surface region of the at least one printhead integrated circuit via at least one of the plurality of ducts. Preferably the gas is an inert gas distributed via a gas duct, and the gas duct includes a gas valve molding formed as a channel with a series of apertures in the base of the channel, and the gas valve molding is longitudinally movable within the gas duct.

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