US Patent 7297076 Method and apparatus for retractable enclosure

A method for assembling a sports enclosure includes coupling a driving gear to an upper support structure, coupling a net having an upper edge and a lower edge to the upper support structure such that an enclosure is at least partially defined by the net, and coupling the lower edge of the net to the driving gear such that operation of the driving gear raises the net such that the net is folded in an accordion like manner between the upper support structure and the lower edge of the net.