Two component, molded plastic dispenser operating on push-pull principle

Abstract

A two piece, molded plastic dispenser, that functions with a push-pull motion, comprising an outer shell and an inner shell. The outer shell comprises a top wall with an aperture defined at its center, and a skirt of generally cylindrical shape. A plug seal extends below the top wall, and annular groove and bead are formed in the vicinity of the upper end of the inner surface of the skirt and the underside of the top wall. The inner shell comprises a top wall, a tapered spud extending upwardly from the top wall, an annular barrier encircling the spud, and a depending skirt. Detents and arcuate wall segments extend, in interspersed fashion, about the perimeter of the upper shell, and cooperate with the bead on the outer shell. Vertical ribs on the inner surface of the outer shell cooperate with serrations on the exterior surface of the inner shell to guide the relative movement of the outer shell, in a vertical direction, while preventing relative rotation between the shells. The contents of the container are discharged through apertures in the inner shell proximate to the spud to flow through the aperture in the outer shell. The plug seal and annular barrier, and the spud and aperture, are fully engaged, when the dispenser is closed, to provide leak-proof operation. The arcuate walls segments extend vertically above the detents to protect same, and the underside of the annular bead abuts a shoulder on each wall segment when the dispenser is closed.