Patent ID: 7427374

Claim:
A method for cooling a heat generating component used in a selective deposition modeling apparatus by convection, the method comprising: generating a first flow of air from an air-moving device; delivering the first flow of air to an venturi duct having an inlet end, an exit end, and a restriction chamber between the inlet end and the exit end, the venturi duct receiving the first flow of air at the inlet end and exhausting the first flow of air at the exit end; establishing a low-pressure zone in the restriction chamber of the venturi duct; providing a port in the restriction chamber operatively engaging the low-pressure zone; drawing a second flow of air into the venturi duct through the port; directing the second flow of air across the heat generating component, wherein the second flow of air is drawn across the heat generating component at a flow rate that substantially provides steady state cooling of the heat generating component.