DISPENSING CLOSURE STRUCTURES

摘要

S P E C I F I C A T I O N It is known to manufacture closure structures so that each of such structures has a cap part including two spaced, aligned bearings and a movable part extending between the bearings and including trunnions fitting within the bearings. At least one of the parts of such closure structures is formed of a material which is sufficiently resilient so that the trunnions may be snapped into the bearings during the assembly of the closure structure. Such a closure structure may be improved so as to reduce damage to one or both of the parts during the manufacture of such a closure structure by shaping the trunnions and the bearings so that they both have shapes of surfaces of revolution which decrease in diameter in accordance with the distance from the portion of the movable part fitting within and between the spaced bearings. The entrances employed should also decrease in width in a corresponding manner.