Printhead for generating ink drops with reduced tails
AssigneeHewlett-Packard Development Company, L.P.
InventorsAlfred I-Tsung Pan, Erik D. Torniainen
Life of this patent
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Abstract
A printhead (10) for use in an inkjet printing process includes a substrate (12) having at least one ink feed opening (14) defined therein, an ink chamber (16) in operative and fluid communication with the ink feed opening(s) (14), and a nozzle plate (18) disposed on a portion (P1) of the substrate (12). The nozzle plate (18) has a plurality of orifices (20) defined therein. The printhead (10) further includes a firing resistor (22) disposed on another portion (P2) of the substrate (12) and proximate to the ink feed opening(s) (14) and a barrier structure (24) disposed on the other portion (P2) of the substrate (12) and positioned adjacent to the firing resistor (22).
Claims14
A printhead for use in an inkjet printing process, the printhead comprising:
- a substrate having at least one ink feed opening defined therein;
- a nozzle plate disposed on a portion of the substrate, the nozzle plate having a plurality of orifices defined therein;
- an ink chamber in operative and fluid communication with the at least one ink feed opening;
- a firing resistor disposed on an other portion of the substrate and proximate to the at least one ink feed opening and operatively associated with at least one of the plurality of orifices;
- and
- a barrier structure also disposed on the other portion of the substrate and positioned adjacent to the firing resistor, wherein the barrier structure includes a pair of substantially parallel barrier strips, each of the barrier strips extending across the substrate on a respective opposed side of the firing resistor, and no other barrier structure is disposed on the substrate between the pair of substantially parallel barrier strips.
Dependencies are inferred from the claim text.