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CONSUMABLE SUPPLY ITEM WITH CAPACITIVE FLUID LEVEL DETECTION FOR MICRO-FLUID APPLICATIONS

  • US 20120218356A1
  • Filed: 02/28/2011
  • Published: 08/30/2012
  • Est. Priority Date: 02/28/2011
  • Status: Active Grant
First Claim
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1. A consumable supply item for an imaging device to hold an initial or refillable volume of liquid, comprising:

  • a rigid housing defining an interior to retain the volume of liquid; and

    a pair of opposed electrodes forming a capacitor having a capacitance that varies in response to an amount of liquid existing between the opposed electrodes, wherein a volume space between the opposed electrodes that can be filled with the amount of liquid varies along a length of the electrodes.

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