IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0304243
(2002-11-26)
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발명자
/ 주소 |
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출원인 / 주소 |
- Rexam Beverage Can Company
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대리인 / 주소 |
Wallenstein, Wagner & Rockey, Ltd.
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인용정보 |
피인용 횟수 :
22 인용 특허 :
67 |
초록
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An ecology end member for a beverage container has a central panel wall with a product side, a public side, and an outer peripheral edge. A non-detachable tab is secured to the public side of the central panel wall by a rivet. A displaceable tear panel is located in the central panel wall adjacent t
An ecology end member for a beverage container has a central panel wall with a product side, a public side, and an outer peripheral edge. A non-detachable tab is secured to the public side of the central panel wall by a rivet. A displaceable tear panel is located in the central panel wall adjacent the rivet. The tear panel is defined by a frangible score and a non-frangible hinge segment. The frangible score has a tear panel geometry with an outer periphery defied by a curvilinear score length. The tear panel geometry is asymmetrically skewed having a large radius of score curvature in a first outer quadrant of the tear panel to provide low resistance to opening the tear panel at the large radius. The tear panel has a radially outermost segment of the score located in a different quadrant of the tear panel.
대표청구항
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1. An ecology end member for a beverage container, comprising:a central panel wall having a product side and a public side with an outer peripheral edge, a non-detachable tab being secured to the public side of the central panel wall by a rivet of the center panel;a displaceable tear panel in the ce
1. An ecology end member for a beverage container, comprising:a central panel wall having a product side and a public side with an outer peripheral edge, a non-detachable tab being secured to the public side of the central panel wall by a rivet of the center panel;a displaceable tear panel in the central panel wall adjacent the rivet, said tear panel being defined by a frangible score and a non-frangible hinge segment, the frangible score having a tear panel geometry with an outer periphery defined by a curvilinear score length, said tear panel geometry being asymmetrically skewed having a large radius of score curvature in a first outer quadrant of the tear panel to provide low resistence to opening the tear panel at said large radius, and the tear panel having a radially outermost segment of the score located in a different quadrant of the tear panel. 2. The end member of claim 1, further comprising a central axis of the tear panel defined along a tab length between a tab nose and a tab lift end and passing through the rivet, the first outer quadrant being located on a first side of the central axis and said different quadrant being located on an opposite side of the central axis. 3. The end member of claim 2, wherein the quadrants of the tear panel are defined by the central axis and a cross axis residing perpendicular to said central axis and passing between a tear panel width, said central axis and said cross axis dividing the tear panel into four separate quadrants with the curvilinear score length in each of said quadrant having a defined radius of curvature, a first inner quadrant being located adjacent the rivet and said first outer quadrant being located radially outward of the first inner quadrant, the score curvature in the first outer quadrant having an enlarged radius of curvature relative to the curvature in the first inner quadrant. 4. The end member of claim 3, wherein the central axis and the cross axis intersect at an axis point, and wherein the score in the first outer quadrant is located closer to the axis point than the position of the score in each of the other three quadrants. 5. The end member of claim 3, wherein the tear panel has a surface area in which a portion of said surface area is located in each of said quadrants, the surface area of the tear panel in the first outer quadrant being less than the surface area of a second outer quadrant positioned adjacent said first outer quadrant. 6. An ecology end member for a beverage container, comprising:a central panel wall having an outer periphery and having a product side and a public side and having a tab secured to said public side; said central panel having a central axis passing through a rivet and a tab length between a nose of the tab and a substantially opposed lift-end;a displaceable tear panel in the central panel wall, said tear panel being defined by a frangible score and a non-frangible hinge segment, said frangible score having an outer periphery defined by a curvilinear score length;said tear panel having a maximum width defined along a cross axis residing perpendicular to said central axis and transecting the central axis at an axis point, said tear panel having four separate quadrants defined by the sectional axis and said cross axis, each said quadrant having a quadrant median axis passing from the axis point to the outer edge of the tear panel;a first quadrant being positioned adjacent the tab and at a vent region of the tear panel, the frangible score of the first quadrant being curvilinear with a radius of curvature and leading directly to a score segment in a second quadrant, said second quadrant being positioned radially outward of said first quadrant and having a curved segment directing the score adjacent the center panel outer periphery toward a third quadrant, the score segment in said second quadrant being curvilinear with a radius of curvature greater than a radius of curvature of the frangible score in a third quadrant. 7. The end member of claim 6, wherein the radius of curvature of the frangible score in the second quadrant is greater than the radius of curvature of the score in said first and third quadrants and generally larger than the radius of curvature used on current production ends. 8. The end member of claim 6, wherein each said quadrant of the tear panel has an extent of surface area of the panel, said second quadrant having less of said extent of surface area relative to the extent of surface area in said third quadrant. 9. The end member of claim 6, wherein the tear panel has an outermost curved score segment located closest the outer periphery of the central panel wall, said outermost curved score segment being located entirely in said third quadrant. 10. The end member of claim 6, wherein the tear panel has an enlarged opening defined by a width along the cross axis being greater than tear panel width along the central axis. 11. The end member of 10 , wherein the tear panel has a maximum width and said maximum width being the linear distance between potions of the frangible score along the cross axis. 12. An end closure for a container, comprising:a central panel wall having a product side and a public side and having a tab secured to said public side by a central rivet, said central panel having a central axis defined along a line passing through the rivet and passing through a tab length along a nose of the tab and an opposed lift-end of the tab, said central axis defining a division between a first side of the axis from a second side of the axis;a displaceable tear panel in the central panel wall, said tear panel having a surface area shape defined by a peripheral edge of a curvilinear score, the tear panel being configured for minimal resistence to opening with said surface area shape having a first portion and a second portion, said first portion having a surface area less than a surface area of the second portion, said first portion being located at the first side of the central axis and said second portion of the tear panel shape being located at the second side of the central axis. 13. The end closure of claim 12, wherein the tear panel has a surface area with the first portion of the tear panel having less of an extent of the surface area relative to the second portion of the tear panel. 14. The end closure of claim 12, wherein the tear panel has a generally tear-drop shape with a vent region adjacent the rivet, a narrow portion of the tear panel being defined by a score segment passing between the vent region and a radially outward area, and a wide portion of the tear panel defined by a score segment passing from the radially outward area to a hinge segment. 15. The end closure of claim 12, wherein the tear panel has a general egg-shape with the outermost segment of the score partially defining the second portion of the tear panel. 16. An end closure for a container, comprising:a central panel wall having a product side and a public side and having a tab secured to said public side; said central panel having a central axis passing through a rivet and through a nose of the tab and an opposed lift-end of the tab;a displaceable tear panel in the central panel wall, said tear panel being defined by a frangible score and a non-frangible hinge segment, said frangible score having an outer periphery defined by a curvilinear score cord length; said central longitudinal axis of the panel defining a 12:00-6:00 clockwise reference line for clockwise geometric orientation of said score outer periphery, the score having a radius of curvature in a 5:00 region along said orientation that is greater than a radius of curvature of the score in an 8:00 region of the score periphery. 17. The end closure of claim 16, wherein the radius of curvature of the score at the 5:00 region along said orientation is greater than the radius of curvature of the score at the 7:00 to 9:00 region of the orientation. 18. The end closure of claim 16, wherei n the radius of curvature of the score at the 4:00 to 6:00 region is greater than the radius of curvature of the score at the 7:00 to 9:00 region of the orientation. 19. An end closure for a container, comprising:a central panel wall having a product side and a public side and having a tab secured to said public side; said central panel having a central axis passing through a center of the rivet and through a nose of the tab and an opposed lift-end of the tab;a displaceable tear panel in the central panel wall, said tear panel being defined by a frangible score and a non-frangible hinge segment, said frangible score having an outer periphery defined by a curvilinear score cord length; said central longitudinal axis of the panel defining a 12:00-6:00 clockwise reference line for clockwise geometric orientation of said score outer periphery, the score having an enlarged radius of curvature in a 4:00 to 5:00 region along said orientation that is larger than at least one radius of curvature along other portions of the score periphery along a length defined along a 6:00 to 9:00 orientation. 20. An end closure for a container, including a central panel wall having a product side and a public side and having a tab secured to said public side by a rivet; said central panel having a central longitudinal axis passing between a nose of the tab and an opposed lift-end of the tab, and being adapted to provide an opening force by the nose when a user lifts said lift end, a displaceable tear panel in the central panel wall, said tear panel being defined by a frangible score and a non-frangible hinge segment, said frangible score having a score residual adapted to fracture when subjected to said opening force by the tab nose, said fracture starting in a vent region of the tear panel and traveling radially outward form the vent region as the opening force is applied, said tear panel having an outer periphery defined by a curvilinear score cord length between said vent region and the hinge segment, the cord length having a first curved segment positioned adjacent the vent region, the score continuing to a second curved segment positioned radially outward of the first curved segment, and the score continuing to a third curved segment that directs the score generally radially inward on the central panel, the improvement comprising;an enlarged radius of curvature at the second curved segment configured to provide mineral resistance to the fracture of the score by application of the opening force.
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