Closure having a mandrel for a container

Abstract

The invention relates to a method for producing a mandrel ( 1 ) for a container closure, characterized in that the mandrel ( 1 ) is first produced in an injection moulding process and separately therefrom at least one seal ( 2 ) is produced and thereafter fixed on the mandrel ( 1 ), or that the mandrel ( 1 ) is first produced in an injection moulding tool by injection moulding process and at least one seal ( 2 ) is produced from a different material in the same injection moulding tool, likewise in an injection moulding process.

1 . A closure for a container having a housing forming with the closure a chamber filled with a material, a pin being movable in the housing and able to pierce a cover of an opening in the housing so that the material from the chamber in the housing can exit the container, wherein the pin has along its axial length at least one seal that is supported on the housing. 
     
     
         2 . The closure according to  claim 1 , wherein the pin has along its axial length two seals that bear against the housing. 
     
     
         3 . The closure according to  claim 1 , wherein the seal is a component that can be fixed separately on the pin. 
     
     
         4 . The closure according to  claim 1 , wherein the seal is integral with the pin. 
     
     
         5 . A pin for a container closure, wherein the pin has at least one seal along its axial length. 
     
     
         6 . A pin according to  claim 5 , wherein the pin has two seals along its axial length. 
     
     
         7 . The pin according to  claim 5 , wherein the seal is a component that can be fixed separately on the pin. 
     
     
         8 . The pin according to  claim 5 , wherein the seal is unitary with the pin. 
     
     
         9 . A method of making a pin for a container closure, the method comprising the steps of:
 first of all making the pin by injection molding and   separately therefrom making at least one seal and then fixing the made seal on the pin.   
     
     
         10 . The method of making a pin for a container closure according to  claim 9 , wherein first of all the pin is produced by injection molding in an injection mold and in the same injection mold at least one seal is produced from a different material also by injection molding.