One-piece closure with re-closable break away lid

Claim 1

A one piece closure for a container, said closure having a cover, a break-open lid within said cover, said lid having a main lid defined by one or more lines of frangible weakness in said cover and a lid tab defined by one or more lines of frangible weakness in said cover, said lid being connected to said cover by a hinge line, said lid tab being integral with said main lid and being on the opposite side of said hinge line from said main lid, upon the application of force to said main lid portion sufficient to break said frangible lines of weakness defining said maid lid and said lid tab being broken free of said cover and enabling rotation of said main lid and said lid tab about said hinge line with said main lid rotating downwardly into said container toward its fully open position thus forming an opening in said cover through which a product within said container can be poured or shaken and with said lid tab rotating upwardly out of the plane of said cover thereby to form a tab opening in said cover, said main lid having a locking tab on its underside so positioned relative to said hinge line that upon said main lid being rotated downwardly into said container substantially to its fully opened position, said locking tab cooperates with a portion of said cover defining said tab opening therein formed by said lid tab thereby to hold said main lid in its fully open position, and upon applying a closing force to said tab, said locking tab moves out of said cooperation with said cover and permits said main lid and said lid tab to rotate back to a closed position in which said main lid and said lid tab are substantially co-planar with said cover thus substantially closing said openings in said cover.