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Capacitive detector for use in extrusion-based digital manufacturing systems

  • US 8,222,908 B2
  • Filed: 02/16/2010
  • Issued: 07/17/2012
  • Est. Priority Date: 02/16/2010
  • Status: Active Grant
First Claim
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1. A detector for use in an extrusion-based digital manufacturing system, the detector comprising:

  • a control board configured to be retained in the extrusion-based digital manufacturing system;

    a sense conductive component operably secured to the control board;

    an excitation conductive component operably secured to the control board to define a first gap between the sense conductive component and the excitation conductive component, the first gap being configured to receive a consumable material used in the extrusion-based digital manufacturing system, wherein the excitation conductive component is configured to generate a first electrical field across the first gap; and

    a reference conductive component operably secured to the control board on an opposing side of the excitation conductive component from the sense conductive component to define a second gap between the excitation conductive component and the reference component, wherein the excitation conductive component is further configured to generate a second electrical field across the second gap.

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