Incremental printing of symbolic information – Ink jet – Ejector mechanism
Patent
1997-11-13
2000-05-23
Braun, Fred L.
Incremental printing of symbolic information
Ink jet
Ejector mechanism
347 21, G01D 1518
Patent
active
060658258
ABSTRACT:
A printer having mechanically-assisted ink droplet separation and method of using same, for separating an ink meniscus from an ink nozzle orifice while clearing-away particulate matter from about the orifice. In a preferred embodiment of the invention, a heater surrounds an orifice formed by the nozzle, the orifice having an ink meniscus residing therein. As the heater heats the ink meniscus, surface tension of the ink meniscus decreases, thereby causing the ink meniscus to extend outwardly from the orifice to define an extended ink meniscus. A cutter, which is disposed near the orifice, includes a plate member disposed opposite an outside surface of the nozzle so as to define a passage between the outside surface and the plate member. The plate member has an opening aligned with the orifice and in communication with the passage. A gas pressure regulator in communication with the passage supplies pressurized gas into the passage, which gas flows along the passage an through the opening. As the gas flows through the opening, it impinges the extended ink meniscus to separate the extended ink meniscus from the orifice. As the extended ink meniscus separates from the orifice, it forms an ink droplet that travels to a receiver medium, so that an ink spot is placed onto the receiver medium. Moreover, as the gas flows through the opening, the gas clears-away particulate matter from about the orifice.
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Anagnostopoulos Constantine N.
Chwalek James M.
Delametter Christopher N.
Lebens John A.
Stevens Walter S.
Braun Fred L.
Eastman Kodak Company
Stevens Walter S.
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