Patent ID: 7634938

Claim:
A method of measuring flow of air in a foam, the method comprising the steps of: identifying a depth of insertion in the foam; adjusting a flange member to the identified depth of insertion, wherein the flange member has a substantially planar surface adapted to form a substantially air tight seal when abutting an external surface of the foam, and wherein the flange member is directly connected to a nozzle; inserting the nozzle into a point of insertion in the foam, wherein the nozzle comprises: a tube sized and dimensioned to be inserted into the foam, said tube having a wall; and an aperture formed in the wall of the tube, wherein the aperture is sized and dimensioned to allow air to flow through the aperture and into the foam, and wherein the aperture extends partially about the circumference of the tube; using the planar surface of the flange member to form a substantially air tight seal with the external surface of the foam, proximate to the point of insertion of the nozzle; receiving air from an air source; and disbursing the air through the aperture, thereby causing the air to flow around fused beads of the foam; using an air flow meter to measure the air flow around the fused beads in the foam to obtain a measurement of air flow, wherein the air flow meter is directly connected to the nozzle to allow unimpeded flow between the air flow meter and the nozzle; and determining the density of the fused beads based on the measurement of air flow.