Throw-away can with integral closure and pull-up spout

Claim 1

A throw-away one-time can for liquid additives for motor-vehicle fuel tanks and the like has a body having a top which includes a circular opening having an upstanding peripheral lip for receiving a circular cross-section closure element adapted to snap removably into said opening, said closure element including a depending integral spout which extends almost to the bottom of said can, said closure element and depending spout comprising: a. an annular plug portion on the underside of said closure element, said plug portion having a lower annular downwardly-inwardly inclined surface and an upper annular upwardly-inwardly inclined surface, the maximum outside diameter of said plug portion being somewhat larger than the diameter of said opening in said can top; b. an enlarged-diameter portion above and integral with said plug portion, the outer portions adapted to rest on said can top when said closure element is snapped into position, said enlarged-diameter portion having an annular recess which extends upwardly just above said upwardly-inwardly inclined surface for receiving and closely confining the upstanding peripheral lip of said top opening when said closure element is snapped into position with said spout extending downwardly through said top opening; c. a pull-up ring above and concentric with said enlarged-diameter portion, said pull-up ring being integrally connected with one side only of said enlarged-diameter portion and adapted, in response to an upward pull applied to said ring, to lift initially said one side only of the enlarged-diameter portion, thereby to open said confining recess and allow said upwardly-inwardly inclined surface to cam said lip radially outwardly, whereby a continued or subsequent upward pull on said ring removes said closure element from its snapped-in position; d. said spout being a hollow cylindrical body integral with and depending from said annular lower inclined surface of said plug portion.