Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
July 7, 2009
Patent Application Number
11241322
Date Filed
September 30, 2005
Patent Citations Received
Patent Primary Examiner
Patent abstract
An ink level sensing system and method of sensing that includes a lower probe positioned in a lower portion of an ink reservoir, an upper probe positioned above the lower probe and extending upward to an upper portion of the ink reservoir, and an electrode positioned next to the lower and upper probes. An electrical signal is driven to the electrode and current flows are detected from the electrode to the lower and upper probes. The current flows to the lower and upper probes are compared to determine a level of ink in the ink reservoir.
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