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Method for determining a characteristic of a consumable

  • US 8,800,084 B2
  • Filed: 09/24/2013
  • Issued: 08/12/2014
  • Est. Priority Date: 09/27/2010
  • Status: Active Grant
First Claim
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1. A method for determining at least one characteristic of a physical resource used in a physical resource consuming apparatus having a controller, an illumination source operably coupled to the controller, a removable component comprising the physical resource, and a graphic applied to the removable component, with the graphic, removable component, and physical resource defining a multiple layer composite, the method comprising:

  • illuminating, with the illumination source, a first depth of the composite and determining a corresponding first reflectance of the first depth of the composite;

    illuminating, with the illumination source, a second depth of the composite, which is deeper than the first depth, and determining a corresponding second reflectance of the second depth of the composite; and

    determining, with the controller, can at least one characteristic, other than the first and second reflectances, of the physical resource from the first and second reflectances.

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