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Filament drive mechanism for use in extrusion-based digital manufacturing systems

  • US 7,896,209 B2
  • Filed: 04/30/2008
  • Issued: 03/01/2011
  • Est. Priority Date: 04/30/2008
  • Status: Active Grant
First Claim
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1. A filament drive mechanism for use in an extrusion-based digital manufacturing system, the filament drive mechanism comprising:

  • a rotatable component comprising an axis of rotation and a central hole aligned with the axis of rotation, the central hole being defined at least in part by an internally-threaded surface, wherein the rotatable component is configured to receive a filament strand through the central hole to engage the internally-threaded surface with the filament strand; and

    at least one rotation mechanism configured to rotate the rotatable component around the axis of rotation to drive the filament strand through the central hole of the rotatable component in a direction along the axis of rotation with the engaged internally-threaded surface.

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