Printer jetting mechanism and printer employing the printer jetting mechanism

A printer jetting mechanism, comprising:

• an ejector device comprising a substrate and an ejector conduit on the substrate, the ejector conduit comprising:
• a first end positioned to accept a print material,
• a second end comprising an ejector nozzle, the ejector nozzle comprising a first electrode, a second electrode, a third electrode, and a fourth electrode, wherein the first and second electrodes are a first electrode pair, and wherein the third and fourth electrodes are a second electrode pair,
• a passageway for allowing the print material to flow from the first end to the second end, at least one surface of the first electrode being exposed in the passageway, least one surface of the second electrode being exposed in the passageway, at least one surface of the third electrode being exposed in the passageway, and at least one surface of the fourth electrode being exposed in the passageway;
• a current pulse generating system in electrical connection with the first electrode and second electrode of the ejector conduit;
• and
• a magnetic field source proximate the second end of the ejector conduit so as to generate a flux region disposed within the ejector nozzle during operation of the 3D printer.

An ejector device comprising:

• a substrate;
• and
• an ejector conduit on the substrate, the ejector conduit comprising:
• a first end configured to accept a print material,
• a second end comprising an ejector nozzle, the ejector nozzle comprising a first electrode, a second electrode, a third electrode, and a fourth electrode, and
• a passageway for allowing the print material to flow from the first end to the second end, at least one surface of the first electrode being exposed in the passageway, at least one surface of the second electrode being exposed in the passageway, at least one surface of the third electrode being exposed in the passageway, and at least one surface of the fourth electrode being exposed in the passageway.