Patent US4073399A successfully refreshed from Google Patents.
US4073399A
Expired / Lapsed
US
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Tear-off closure
Assignee: Alcoa Corp
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Filing: 1976-02-25
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Granted: 1978-02-14
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Expires: 1996-02-25
Abstract
Abstract An improved tear-off closure for a container comprising a top end wall, a depending closure skirt around the top end wall and a pull ring around the bottom edge of the closure skirt. The closure has a pair of score lines therein traversing the skirt and the top end wall to define a tear strip across the closure. The pull ring is integrally connected to the tear strip at the bottom of the closure skirt. A line of separation between the pull ring and the closure skirt extends from a location adjacent the score line on one side of the tear strip around the closure skirt to a location adjacent the score line on the other side of the tear strip. The curved terminal ends of the line of separation are spaced from the tear strip laterally of the score lines on both sides of the tear strip.
Inventors
- 👤 Paul R. Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:31
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/38; B21D51/383; B65; B65D; B65D41/00; B65D41/32; B65D41/40; B65D41/44
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
145 words
A tear-off closure for a container comprising a top end wall, a depending closure skirt around the top end wall and a pull ring around the bottom edge of said closure skirt, said closure having a pair of score lines therein traversing said skirt and top end wall to define a tear strip across said closure with said pull ring integrally connected to said tear strip at the bottom of said closure skirt, and a line of separation between said pull ring and said closure skirt from a location adjacent said score line on one side of said tear strip around said closure skirt to a location adjacent said score line on the other side of said tear strip, with the terminal ends of said line of separation spaced from said tear strip laterally of said score lines on both sides of said tear strip.
Claim 2
Dependent Claim
145 words
A tear-off closure for a container comprising a top end wall, a depending closure skirt around the top end wall and a pull ring around the bottom edge of said closure skirt, said closure having a pair of score lines therein traversing said skirt and top end wall to define a tear strip across said closure with said pull ring integrally connected to said tear strip at the bottom of said closure skirt, and a line of separation between said pull ring and said closure skirt from a location adjacent said score line on one side of said tear strip around said closure skirt to a location adjacent said score line on the other side of said tear strip, with the terminal ends of said line of separation spaced from said tear strip laterally of said score lines on both sides of said tear strip.
Claim 3
Dependent Claim
37 words
A tear-off closure as set forth in claim 1 in which the terminal ends of said line of separation are located on the closure radially inwardly of the ends of the score lines on said closure skirt.
Claim 4
Dependent Claim
33 words
A tear-off closure as set forth in claim 1 in which the terminal ends of said line of separation curve radially inwardly to locations inwardly of the terminal ends of said score lines.
Claim 5
Dependent Claim
34 words
A tear-off closure as set forth in claim 1 in which said line of separation comprises a slit line interrupted by at least one bridge of metal between the pull ring and closure skirt.
Claim 6
Dependent Claim
157 words
A sealed container comprising in combination a container body having a mouth opening defined by a crown finish, and a tear-off closure sealed over the mouth opening in said container, said closure having a top end wall, a skirt depending from the peripheral edge of the wall, the bottom edge of the closure skirt is constricted inwardly under an annular outwardly projecting bead extending around the entire periphery of the container mouth, a par of score lines therein traversing said skirt and top end wall to define a tear strip across the closure, and a pull ring around the bottom of the closure integrally attached to the tear strip and to the closure skirt by unweakened metal contiguous the score lines on both sides of the tear strip, the edge of metal in the pull ring adjacent the closure skirt are curved radially inwardly and upwardly into the unweakened metal on both sides of the tear strip.
Claim 7
Dependent Claim
157 words
A sealed container comprising in combination a container body having a mouth opening defined by a crown finish, and a tear-off closure sealed over the mouth opening in said container, said closure having a top end wall, a skirt depending from the peripheral edge of the wall, the bottom edge of the closure skirt is constricted inwardly under an annular outwardly projecting bead extending around the entire periphery of the container mouth, a par of score lines therein traversing said skirt and top end wall to define a tear strip across the closure, and a pull ring around the bottom of the closure integrally attached to the tear strip and to the closure skirt by unweakened metal contiguous the score lines on both sides of the tear strip, the edge of metal in the pull ring adjacent the closure skirt are curved radially inwardly and upwardly into the unweakened metal on both sides of the tear strip.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |