Patent ID: 6932508

Claim:
A positive sealing apparatus, in combination with a valve bag, wherein the valve bag has a tubular body, with an outer lap overlying an inner lap with a seal extending longitudinally therebetween, the valve bag having a valve opening formed by a gap in the longitudinal seal, the valve bag further having portions of the outer and inner laps disposed adjacent and to the outside of the valve opening, the positive sealing apparatus comprising: a valve seal liner, disposed in juxtaposed overlying relation to at least one of the portions of the outer and inner laps disposed adjacent and to the outside of the valve opening, at least one strip of adhesive material, disposed between the valve seal liner and the at least one of the portions of the outer and inner laps disposed adjacent and to the outside of the valve opening, the adhesive having a first adhesive affinity for the material from which the bag is fabricated, and a second adhesive affinity for the material from which the valve seal liner is fabricated, the first adhesive affinity being greater than the second adhesive affinity, whereupon removal of the valve seal liner, the adhesive remains on the at least one of the outer lap and the inner lap, and further upon pressing of the outer lap against the inner lap, the outer lap and inner lap are adhered to one another, the at least one strip of adhesive material being located so as to completely seal a region between the outer and inner laps that completely surrounds the valve opening of the bag, for creating a positive seal, toward precluding undesired escape of material contained within the bag said valve seal liner further comprising a first portion disposed in juxtaposed overlying relation to the portion of the outer lap disposed adjacent and to the outside of the valve opening and a second portion disposed in juxtaposed overlying relation to the portion of the inner lap disposed adjacent and to the outside of the valve opening, so that the valve seal liner extends across the valve opening, along a distance greater than a length of the valve opening.