Patent ID: 7572403

Claim:
An apparatus for fabricating three-dimensional objects comprising: (a) at least two different material feeders selected from the group consisting of i. a powder dispensing feeder; ii. a liquid dispensing feeder; iii. a wire feeder; (b) a worktable; (c) a head unit for receiving the at least two different materials and dispensing the materials onto the worktable, the head unit comprising at least one power source and at least one arched support arm wherein the power source is mounted to and slidably moveable along the at least one arched support arm, the arched support arm being curved and having a focal point with center on the work table and the arched support arm being oriented so that the at least one power source is directed at the worktable throughout its range of motion along the arched support arm; and (d) control means for controlling movement of the worktable and head unit, application of the at least two different material feeders, and application of the power source.