GIS as modelling and decision support tool for air quality management: a conceptual framework

A stamped and scored one piece push-in tear tab can lid has a beak embossed in the tear tab along with a finger or thumb push area to the rear of the beak. When the push area is depressed the beak tears the tab loose and rotates with the tab into the can, buckling at a hinge line between the tab and push area. As the user's digit applies pressure behind the opening and not over it as in prior constructions, there is little opportunity for the user's finger or thumb going into the opening.