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US 2015/0029252 A1Published application
Determining an Issue in an Inkjet Nozzle with Impedance Measurements
AssigneeHewlett-Packard Development Company, L.P.
InventorsAndrew L. Van Brocklin, Eric T. Martin, Alexander Govyadinov, David Maxfield
Life of this patent
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Abstract
A method for determining an issue in an inkjet nozzle with impedance measurements, includes taking a first impedance measurement to detect a drive bubble with an impedance sensor, and taking a second impedance measurement to detect said drive bubble with said impedance sensor after said first impedance measurement.
Claims15
A method for determining an issue in an inkjet nozzle with impedance measurements, comprising:
- taking a first impedance measurement to detect a drive bubble with an impedance sensor;
- and
- taking a second impedance measurement to detect said drive bubble with said impedance sensor after said first impedance measurement.
An ink jet print head, comprising:
- an ink chamber comprising a drive bubble formation mechanism and an impedance sensor positioned to detect a presence of a drive bubble;
- said impedance sensor being in communication with a processor programmed to:
- take a first impedance measurement within said ink chamber after initiating a chive bubble formation mechanism;
- and
- take a second impedance measurement within said ink chamber after taking said first measurement.
2 more elements
A printer, comprising:
- a nozzle in fluid communication with an ink chamber, said ink chamber comprising a impedance sensor;
- and
- said impedance sensor being in communication with a processor, said processor programmed to:
- send a first measurement command to said impedance sensor;
- send a second measurement command to said impedance sensor after said first measurement command;
- and
- determine an issue within said ink chamber based on measurements taken in response to said first and second measurement command.
4 more elements
Dependencies are inferred from the claim text.