Patent ID: 7156637
Filing Date: 2007-01-02
Classification: A61C,B29C,B29L

Abstract:
1. A cold press injection molding apparatus for fabricating dental prostheses from thermoplastic resinous materials comprising: a) a piston that pushes a plunger to activate the injection molding operation; b) a quantity of thermoplastic resin out of which the prosthesis is made; c) a flexible containment and delivery means selected from the group consisting of a flexible metal foil bag, a foil burst pouch, a syringe, an ingot, a resin cylinder, fiberglass, metal, polyester film, fabric, a disc, and woven material that holds said thermoplastic resin until delivery into an injection tube which is pre-measured and independently heated in an amount appropriate to the prosthesis being fabricated; d) an injection tube which acts as a heat sink made from material able to withstand the fusion temperature of the thermoplastic resin; e) a nozzle on the end of said injection tube which delivers the fused thermoplastic resin into a dental flask, and made from a material able to withstand the fusion temperature of the thermoplastic resin; f) a mold in the flask from which the prosthesis is formed from fused thermoplastic resin whereby the fabricated prosthesis is identical in shape and dimensions to the mold from which it was made.