Consumable supply item with fluid sensing and pump enable for micro-fluid applications
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United States of America Patent
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Mar 20, 2018
Grant Date -
Dec 31, 2015
app pub date -
Sep 14, 2015
filing date -
May 31, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A consumable supply item for an imaging device holds an initial or refillable volume of ink. A housing defines an interior having a pair of opposed electrodes. The electrodes have a capacitance that varies in response to an amount of liquid between them. A controller energizes one electrode and receives an output reading from the other. The controller processes the reading on board the housing and supplies it as a digital data stream to the imaging device during use. A memory stores calibration values for an empty and full housing. The controller writes back to the memory present fluid levels obtained from the output reading of the electrode. An enable output allows operation or not of a fluid pump in the imaging device. Materials, construction, modularity, and fluid communication ports are further embodiments, to name a few.
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