Patent ID: 7686608
Filing Date: 2010-03-30
Classification: B29C

Abstract:
1. A system for controlling the flow of a substance, comprising: a chamber configured to accommodate a mold surface; an inlet port in the chamber, wherein the substance is introduced into the chamber through the inlet port; flexible tubing coupled between the inlet port and a reservoir containing the substance; a pump operable to compress a portion of the flexible tubing to move the substance through the tubing and inject the substance into the chamber; a containment layer positioned between the mold surface and the inlet port; and a distribution medium positioned between the containment layer and the inlet port; wherein the containment layer substantially prevents the substance from flowing from the distribution medium to the mold until the distribution medium is substantially filled with the substance, the containment layer is selected from materials whose porosity increases under an increase of at least one of the group of: vacuum force, atmospheric pressure, and temperature.