US Patent 9623594 Air duct cuff and method of manufacture

An air duct for transferring air or the like includes a tubular body, an internal cuff that is secured to and extends axially from the tubular body, and an external cuff that is secured to and extends radially from at least the internal cuff. A method for manufacturing an air duct includes providing a tubular body having at least one open end which is inserted into an internal cuff mold to form an internal cuff that is secured to and axially extends from the tubular body. The tubular body and the internal cuff are removed from the internal cuff mold and then inserted into an external cuff mold to form an external cuff that is secured to and radially extends from at least the internal cuff. The tubular body with the internal cuff and the external cuff is then removed from the external cuff mold.