Patent ID: 8083323

Claim:
A print head for dispensing ink, comprising: a substrate; an ejector array over the substrate comprising a plurality of ejectors, each ejector of the plurality of ejectors configured to eject ink from a nozzle aperture, the ejector array comprising: a nozzle plate overlying the substrate which provides a nozzle aperture for each of the plurality of ejectors; and a membrane interposed between the nozzle plate and the substrate; a plurality of ink cavities provided at least in part by the nozzle plate and the membrane; and an ink heater arranged in thermal contact with the substrate and interposed directly between the plurality of ink cavities and the substrate and directly below the plurality of ink cavities, wherein the ink heater spans a majority of the ejector array and is configured to activate and to deactivate during ejection of ink from the ejector array in response to a measured ink temperature.