Patent ID: 6543275
Filing Date: 2003-04-08
Classification: G01N

Abstract:
An apparatus for testing the air permeability of a fabric comprising:a flow regulator for controlling the flow rate of an air flow therethrough; a flow meter in fluid communication with said flow regulator for indicating an air flow rate; a sample holder in fluid communication with said flow meter for holding a fabric sample therein such that said air flow passes through the fabric sample exiting an outlet tube; and a quantitative tube equipped with an enlarged portion that is optically transparent in fluid communication with a gas outlet on top of the quantitative tube and a fluid reservoir at a bottom of the quantitative tube, said fluid reservoir for holding a quantity of a fluid that generates bubbles when air passes over a top surface of the fluid and is connected to said enlarged portion by a tube section, said tube section is further in fluid communication with said outlet tube of said sample holder for admitting said air flow flown through said fabric sample and for exiting said air flow from said gas outlet on top.