Patent ID: 7527489

Claim:
A vacuum forming apparatus that utilizes a mold comprising, the mold contains a cavity having a shape of an item to be cast from a urethane material and said cavity is open to receive a urethane material flow; a bell shaped outer cover having a lower lip to fit onto a hub area at a lower portion of said mold and receive at least one ring seal, and said bell shaped cover provides a space therein that contains said mold and that said cavity of said mold vents into and includes a port that is connected to a low level vacuum source; a canister for receiving a mixture of urethane constituents and has an open top that includes a vent port extending outwardly therefrom, mounts a valve seat to pass said urethane material flow through said valve seat and into said mold cavity, and includes a ring seal for isolating a canister outer surface from an area under said bell shaped outer cover, and a valve means that includes a movable member to fit into and close over said valve seat, and said valve means is arranged to open into a mold passage that connects to said cavity to pass a liquid flow of said mixture of urethane constituents therefrom; and means for pulling a deep vacuum through said canister vent port to pull air from said canister.