Closure with lifting mechanism
View Patent ↗A closure having a device for lifting a liner from a container opening. The lifting device being a finger projecting from a hinge connection within the closure. The hinge connection is positioned from a depending skirt of the closure. The hinged finger disengages the liner from a sealing engagement with the container while engaging along substantially the same annulus spaced from the liner edge. A plurality of the hinged fingers may be used for the lifting device. The closure may be used in various retort and aseptic applications, as well as provide for tamper indication.
1. A closure-container assembly constructed to lift a liner affixed to a container neck when a closure is removed from a container comprising:
a container having a container neck with an opening defined by a container rim;
a liner overlying said opening of said container neck;
a closure having a top wall with a depending skirt, said closure being removably engageable with said container neck to overlie said liner; and
a lifting device being at least one hinged finger projecting inwardly from said depending skirt by a hinge connection thereby said at least one hinged finger is pivotable about said hinged connection relative to said skirt, said hinged finger engaging at an annular position of an underside of said liner, said annular position is at a first radius, wherein said first radius is at an outer periphery of said container rim, said engagement at said first radius of said annular position between said hinged finger and said liner underside remains substantially unchanged when lifting said liner up and away from said opening during the rotational removal of said closure from said container neck.
2. The closure-container assembly as in claim 1 wherein said closure includes a tamper-indicating device.
3. The closure-container assembly as in claim 2 wherein said tamper indicating device is a tamper-indicating band projecting from said depending skirt.
4. The closure-container assembly as in claim 1 wherein said hinged finger is substantially rigid.
5. The closure-container assembly as in claim 1 wherein said hinged finger includes a distal end that is thicker in cross section than said hinged connection.
6. The closure-container assembly as in claim 1 wherein said hinged finger projects from an annular bead of said depending skirt.
7. A closure constructed to lift a liner affixed to a container neck when said closure is removed from a container comprising:
a top wall and a depending skirt having a thread for engagement with said container neck;
a plurality of rigid fingers attached to an inner surface of said depending skirt by a hinged connection, a distal free end of each of said fingers being adjacent said top wall when each of said fingers is in a substantially upwardly extending direction, and an angle between said depending skirt and each of said upwardly extending fingers remaining substantially unchanged during the removal of said closure; and
a rib projecting from said inner surface of said depending skirt positioning said liner,
wherein each of said rigid fingers has an aperture adjacent said hinged connection.
8. The closure as in claim 7 further including an equidistantly spaced plurality of said rigid fingers.
9. The closure as in claim 7 wherein said top wall has an aperture therethrough.
10. The closure as in claim 7 wherein said top wall has a depending projection positioning said liner.
11. The closure as in claim 8 further including a tamper-indicating device depending from a bottom edge of said skirt.
12. The closure as in claim 7 further including a retort liner affixed to the container.
13. A closure constructed to lift a liner affixed to a container neck when said closure is removed from a container comprising:
a top wall and a depending skirt having a thread for engagement with said container neck;
a plurality of rigid fingers attached to an inner surface of said depending skirt by a hinged connection, a distal free end of each of said fingers being adjacent said top wall when each of said fingers is in a substantially upwardly extending direction, and an angle between said depending skirt and each of said upwardly extending fingers remaining substantially unchanged during the removal of said closure; and
a rib projecting from said inner surface of said depending skirt positioning said liner,
wherein said distal free end of each of said fingers is substantially thicker in cross section than said hinged connection.
14. A closure constructed to lift a liner affixed to a container neck comprising:
a top wall with a depending skirt having an internal thread formation for engagement with said container neck;
at least one substantially rigid finger positioned adjacent said internal thread formation by a hinged connection, said rigid finger substantially maintains its linear shape when lifting said liner from engagement with said container neck; and
said finger having a distal free end adjacent said top wall when said finger is in a substantially upwardly extending direction, said distal free end being substantially thicker in cross section than said hinged connection.
15. The closure as in claim 14 wherein said finger includes an aperture adjacent said hinged connection.
16. The closure as in claim 14 further including a tamper-indicating device.
17. The closure as in claim 16 wherein said tamper-indicating device is a tamper-indicating band projecting from said depending skirt.
18. The closure as in claim 14 further including a plurality of said fingers.
19. The closure as in claim 14 wherein said top wall has an aperture therethrough.
20. The closure as in claim 14 further including said liner.
21. A closure-container assembly constructed to lift a liner affixed to a container neck when a closure is removed from a container comprising:
a container having a container neck with an opening;
a liner overlying said opening of said container neck;
a closure having a top wall with a depending skirt, said closure being removably engageable with said container neck to overlie said liner;
a plurality of hinged fingers having a distal free end opposite a hinge connection, said hinge connection positioned on said depending skirt and projecting said distal free end inwardly from said depending skirt, said distal free end engaging at an annular position of an underside of said liner when lifting said liner up and away from said opening during the initial removal of said closure from said container neck; and
said distal free end of each said hinged finger is substantially thicker in cross section than said hinge connection.
22. A closure constructed to lift a liner affixed to a container neck when said closure is removed from a container comprising:
a top wall and a depending skirt having a thread for engagement with said container neck;
said liner is semi flexible and in a sealing engagement with a container rim defining an opening of said container neck;
a plurality of substantially rigid fingers hingedly attached to an inner surface of said depending skirt by a hinged connection whereby each said finger is pivotable about said hinged connection relative to said skirt, a distal free end of each said finger being underneath said liner when said finger is in a substantially upwardly extending direction;
said distal free end of each said finger engaging an underside of said liner upon initial removal of said closure from said container;
wherein said distal free ends of said fingers rigidly exert upward pressure on said liner radially outward from said container rim thereby breaking said sealing engagement between said liner and said container rim during removal of said liner while substantially maintaining shape and resisting deformation caused by the upward forces of said closure removal; and
a tamper-indicating band is frangibly attached to said skirt and is removed from said closure upon the initial removal of said closure from said container before said liner is lifted from said opening by said plurality of fingers.