Technology No. 2: FFF
What it is: Fused Filament Fabrication (similar process to FDM, but not trademarked)
Inventor: Scott Crump
Year: Late 1980s
Materials: Plastics are most common, but other compound materials are also used.
Process: Material is extruded through a nozzle that moves over a build platform, which is lowered as each layer is added; that is, fine lines of molten thermoplastics are extruded onto a platform (following a 3D design pattern), which solidify when deposited
Price Range: $200 to $18,000
Systems Sold by: Stratasys, Makerbot, 3D Systems, Fab@Home, Solid Concepts