Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Reexamination Certificate
2008-04-04
2010-10-26
Kim, Ellen (Department: 2874)
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
C347S089000, C347S085000
Reexamination Certificate
active
07819515
ABSTRACT:
A printer comprising:an inkjet printhead having an ink inlet, an ink outlet and a plurality of nozzles;a priming system for priming the printhead, the priming system comprising:an ink chamber having an outlet port connected to the ink inlet via an upstream ink line;an air pump having a pump outlet communicating with a headspace above the ink in the chamber;a sensor positioned for sensing ink in a downstream ink line connected to the ink outlet, the sensor cooperating with the pump such that the pump is shut off when the sensor senses any ink; andmeans for minimizing phantom sensing of ink caused by ink bubbles in the downstream ink line,wherein, in a priming configuration, the pump is configured to positively pressurize the headspace until the sensor senses ink.
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Low David Jeremy
Silverbrook Kia
Kim Ellen
Silverbrook Research Pty Ltd
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