| United States Patent | 6,441,338 |
| Rabinovich | August 27, 2002 |
A model building apparatus includes a beam delivery module and a stage movable in the X, Y and Z directions. A feedstock holding mechanism for the model building apparatus enables the model building apparatus to corrugate the feedstock into a latticed layer. The feedstock holding mechanism includes a feeder housing a spool of feedstock and jaws having push-down arms and side-holding arms. Engaging and disengaging of the feedstock by the jaws while moving the table allows for forming a latticed layer of feedstock that is several times thicker than the thickness of the feedstock. Reducing the total number of layers that comprise the model significantly increases the speed of constructing models that do not require solid walls. The latticed layers may be formed in a continuous process without cutting the feedstock prior to adding a new layer of feedstock, thereby improving the quality of the lattice structure due to less cutting and starting of the feedstock. A fully automatic, computer-controlled process of steel rule die-making goes from CAD design to finished die in a minutes, allowing production of any 3-Dimensional steel rule die.
| Inventors: | Rabinovich; Joshua E. (15 Voss Ter., Newton, MA 02159) |
| Appl. No.: | 546382 |
| Filed: | April 10, 2000 |
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