초록 ▼

The disclosure relates to a unitary molded article and a method for producing a multi-part closure for assembly on the neck of a container, the closure involving an axially shiftable valve element which is movable between open and closed position. All parts of the multi-part valve element are integr

The disclosure relates to a unitary molded article and a method for producing a multi-part closure for assembly on the neck of a container, the closure involving an axially shiftable valve element which is movable between open and closed position. All parts of the multi-part valve element are integrally molded in a common molding cavity and the various relatively movable parts are interconnected by thin annular webs which are severed and the parts placed in proper operative condition during the assembly of the closure to the neck of a container by a conventional applicating machine.

대표청구항 ▼

A unitary molded article of elastomeric material for forming a dispensing closure for a container neck, said article comprising a cap-shaped portion having a panel and a depending annular skirt constructed and arranged to snugly engage a container neck, said cap-shaped portion defining a vertical sl

A unitary molded article of elastomeric material for forming a dispensing closure for a container neck, said article comprising a cap-shaped portion having a panel and a depending annular skirt constructed and arranged to snugly engage a container neck, said cap-shaped portion defining a vertical sleeve having a valve receiving opening, a hollow valve portion coaxially disposed relative to said skirt portion but axially upwardly spaced from said opening, said hollow valve portion initially comprising integrally molded components including a transverse cylindrical base portion snugly insertable in said vertical sleeve and having an upstanding plug and vertical dispensing openings below said plug; and a cup shaped portion having an open top bore, a vertical opening in its bottom portion adapted for sealing engagement with said plug and a severable web portion initially connecting said cap portion to said plug to maintain said cap portion in axially spaced relationship to said base portion, and a severable web portion joining said sleeve and said base portion, adapted to shear when a predetermined axial downward force is applied to said hollow valve portion thereby causing said hollow valve portion to move axially downwardly into said valve receiving opening to close said valve receiving opening in said cap portion, said hollow valve portion being vertically slidable in said sleeve when said web means is severed, said cup portion thereof having an external surface snugly engageable with the interior wall of said vertical sleeve, and retaining means on said sleeve engageable with said external surface of the cup shaped portion to resiliently retain the latter within said sleeve, whereby vertical movement of said cup shaped portion after severing thereof from said plug portion to a position above said plug portion permits product dispensing flow through said closure.