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Fused filament fabrication system and method

  • US 9,469,071 B2
  • Filed: 07/31/2014
  • Issued: 10/18/2016
  • Est. Priority Date: 08/01/2013
  • Status: Active Grant
First Claim
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1. A fused filament fabrication system comprising:

  • a drive gear coupling to a motor during operation, the drive gear selectively operatively engaging first or second sets of idler gears during operation of the system; and

    first and second filaments for the selective passage of material to corresponding first and second extruders, the first filament being positioned between said first idler gear shaft and idler bearings and said second filament being positioned between said second idler gear shaft and idler bearings, wherein said selectively operatively engaging said first or second idler gears is achieved by changing the rotational direction of said drive gear.

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