Patent ID: 8530031

Claim:
A label structure for incorporation into a container having a wall structure defining a receptacle, and an evacuation port in the wall structure through which gas can pass from the receptacle to an outside environment, said label structure comprising: a film layer forming a seat platform on which a seating area is located, wherein the film layer that forms the seat platform has an opening; a film layer forming a flap platform on which at least one valve flap is located, the at least one valve flap formed by at least one cut in the film layer that forms the flap platform located inward from the outer perimeter, the at least one valve flap having a movable portion defined by the at least one cut and the hinge portion remaining integrally connected to the film layer that forms the valve platform, wherein the movable portion pivots about the hinge portion between a closed position, wherein the valve flap is seated on the seating area to close the opening in the film layer that forms the seat platform, and an open position, wherein the valve flap lifts away from the seating area to open the opening; a label-to-wall adhesive on the surface of the film layer forming the seat platform opposite the seating area, which is to be secured to the wall structure of the container; a seating adhesive on at least the seating area which holds the valve flap in the closed position; and a film-to-film adhesive on the seating adhesive that secures the film layers together, wherein the inner perimeter of the film-to-film adhesive is spaced outwardly from the seating area defined by the at least one valve flap.