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Rapid prototyping system with filament supply spool monitoring

  • US 6,022,207 A
  • Filed: 01/26/1998
  • Issued: 02/08/2000
  • Est. Priority Date: 01/26/1998
  • Status: Expired due to Term
First Claim
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1. A rapid prototyping system for making a three-dimensional physical object by depositing solidifiable material in multiple layers, comprising:

  • a movable extrusion head having an inlet for receiving a filament of a material which solidifies at a predetermined temperature, and an outlet for delivering the material in a molten state;

    a spool carrying a coil of filament, the spool having an associated circuit for maintaining data regarding type and amount of filament on the spool;

    a filament drive for withdrawing filament from the spool and supplying the filament to the liquifier; and

    updating means for updating the data regarding the amount of filament on the spool as a function of filament withdrawn from the spool by the filament drive.

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