Internal container bore mount fitment

Abstract

In an embodiment of the invention there is provided a membrane fitment designed and sized to be inserted into the orifice defined by a container. Retention structure on the fitment cooperates with complimentary structure on the internal wall of the container orifice to secure the fitment within the orifice such that the combination forms an excellent primary seal. Tamper evidence is offered by the normal requirement for initial membrane removal. Novel designs for the membrane, its associated pull ring, and the frangible removal structure are taught in various embodiments. The novel designs may promote facile initial removal suitable for a child. In addition, the novel designs avoid the potential hazards presented by prior art membranes.

1 . A fitment used for insertion into a bore defined by a container neck finish, the fitment comprising:
 an annular top edge surrounding a dispensing opening;   a skirt downwardly depending from the annular top edge, the skirt having an exterior wall for engaging at least a portion of the container neck finish and having an interior wall with an annular projection intermediate top and bottom ends defined by the skirt such that the dispensing opening is adjacent the bore of the container neck finish;   a removable membrane circumferentially connected to the annular projection through a first line of weakness for closing the dispensing opening and the bore and wherein the first line of weakness is a circular line having a first circular line endpoint terminating at a post, the post connected to a pull ring,   a second line of weakness being a serpentine line having a first serpentine line endpoint terminating at said post and having a second serpentine line endpoint terminating at a thickened section, the thickened section further defined as being on a portion of the removable membrane within the circular line of weakness and that is not in contact with any portion defined by circular line of weakness,   whereby when the membrane is removed from the annular projection, the circular line and the serpentine line work in concert to tear the membrane into a strip of material.   
     
     
         2 . A fitment used for insertion into a bore defined by a container neck finish, the fitment comprising:
 an annular top edge surrounding a dispensing opening;   a skirt downwardly depending from the annular top edge, the skirt having an exterior wall for engaging at least a portion of the container neck finish and having an interior wall with an annular projection intermediate top and bottom ends defined by the skirt such that the dispensing opening is adjacent the bore of the container neck finish;   a removable membrane circumferentially connected to the annular projection through at least one line of weakness for closing the dispensing opening and the bore, the removable membrane having a pull ring connected thereto, and wherein the at least one line of weakness forms a substantially rectangular removable membrane; and   a post connecting the pull ring to the removable membrane, the post being connected to the removable membrane such that said post does not come into contact with any portion defined by the line of weakness.   
     
     
         3 . The fitment of  claim 2 , wherein the substantially rectangular removable membrane has two end regions that have a longer width than a width defined by a region intermediate to the two end regions. 
     
     
         4 . A fitment used for insertion into a bore defined by a container neck finish, the fitment comprising:
 an annular top edge surrounding a dispensing opening;   a skirt downwardly depending from the annular top edge, the skirt having an exterior wall for engaging at least a portion of the container neck finish and having an interior wall with an annular projection intermediate top and bottom ends defined by the skirt such that the dispensing opening is adjacent the bore of the container neck finish;   a removable membrane circumferentially connected to the annular projection through at least one line of weakness for closing the dispensing opening and the bore, the removable membrane having a pull ring connected thereto, and wherein the at least one line of weakness forms a substantially paddle-shaped removable membrane;   a post connecting the pull ring to the removable membrane, the post being connected to the removable membrane such that said post does not come into contact with any portion defined by the line of weakness.   
     
     
         5 . The fitment of  claim 4 , wherein the post is positioned near a handle-shaped region defined by the paddle-shaped removable membrane. 
     
     
         6 . The fitment of  claim 5 , wherein the handle-shaped region has a substantially flat end. 
     
     
         7 . The fitment of  claim 5  wherein the handle-shaped region has a substantially curved end. 
     
     
         8 . A fitment used for insertion into a bore defined by a container neck finish, the fitment comprising:
 an annular top edge surrounding a dispensing opening;   a skirt downwardly depending from the annular top edge, the skirt having an exterior wall for engaging at least a portion of the container neck finish and having an interior wall with an annular projection intermediate top and bottom ends defined by the skirt such that the dispensing opening is adjacent the bore of the container neck finish;   a removable membrane circumferentially connected to the annular projection through at least one line of weakness for closing the dispensing opening and the bore, and wherein the at least one line of weakness forms a substantially circular removable membrane;   a circular pull ring connected to the membrane through a post, and wherein the circular pull ring has a diameter substantially smaller then the circular removable membrane, wherein the post is connected to the membrane such that the post does not come into contact with any portion defined by the line of weakness.   
     
     
         9 . The fitment of  claim 8 , wherein the diameter of the circular pull ring is between 20%-35% of the diameter of the circular membrane. 
     
     
         10 . A fitment used for insertion into a bore defined by a container neck finish, the fitment comprising:
 an annular top edge surrounding a dispensing opening;   a skirt downwardly depending from the annular top edge, the skirt having an exterior wall for engaging at least a portion of the container neck finish and having an interior wall with an annular projection intermediate top and bottom ends defined by the skirt such that the dispensing opening is adjacent the bore of the container neck finish; and   a removable membrane circumferentially connected to the annular projection through a first line of weakness for closing the dispensing opening and the bore, and wherein the first line of weakness is defined as a circular line of weakness having a first circular line endpoint terminating at a post, the post connected to a pull ring;   a second line of weakness being a segmented line having a first segmented line endpoint terminating at said post and having a second segmented line endpoint terminating at a thickened section, the thickened section further defined as being on a portion of the removable membrane within the circular line of weakness and that is not in contact with any portion defined by circular line of weakness,   whereby when the membrane is removed from the annular projection, the circular line and the segmented line work in concert to tear the membrane into a non-disk shaped membrane material.   
     
     
         11 . A fitment used for insertion into a bore defined by a container neck finish, the fitment comprising:
 an annular top edge surrounding a dispensing opening;   a skirt downwardly depending from the annular top edge, the skirt having an exterior wall for engaging at least a portion of the container neck finish and having an interior wall with an annular projection intermediate top and bottom ends defined by the skirt such that the dispensing opening is adjacent the bore of the container neck finish;   a removable membrane connected to the annular projection through two lines of weakness intersecting for closing the dispensing opening and the bore, and wherein the two lines of weakness are geometrically curved such that endpoints defined by the two lines of weakness intersect to form a mouth shaped removable membrane; and   a post connecting the membrane to a pull ring.   
     
     
         12 . The fitment of  claim 2 , wherein the rectangular removable membrane is bowed towards a center region defined by the rectangular removable membrane.