US Patent 7040528 Dispenser/closure for flexible product containers

A dispenser adapter assembly for bags includes a bag having a line of weakness defining an opening, and a dispenser adapter mounted to the bag. The dispenser adapter is formed of a first main base portion having an opening and a second slider retention base portion having an opening, with the two base portions being folded together with the openings substantially aligned with the bag opening. In addition a slide actuator is mounted between the two portions of the base for movement between a closed position blocking the openings and an open position permitting product flow through all of the openings. Mating movable and fixed stops are also provided to limit outward movement of the slide actuator.