PERFECCIONAMIENTOS EN CIERRES SURTIDORES PARA BOTELLAS YNO RECIPIENTES.

摘要

Push-pull dispensing closure provided with interengaging angulated ribs and cooperating lugs on the exterior of the shell member chimney portion and interior of the tip member sleeve portion, respectively, to provide a limited degree of relative rotation therebetween during extension or opening movement of the tip member and finding particular utility when utilized as a dispensing closure for a bottle or container of viscous or thixotropic material requiring shaking immediately before use. This construction provides apparatus for preventing spurting upon opening of the closure after such shaking.