Patent US4453644A successfully refreshed from Google Patents.
US4453644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cap with tear-off tag
Assignee: Toyo Seikan Group Holdings Ltd
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Filing: 1982-05-07
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Granted: 1984-06-12
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Expires: 2002-05-07
Abstract
Abstract Cap (1) with tear-off tag having a pulling member in the form of a ring or eye connected to the tear-off tag. The cap is characterized by at least one upset buckling or impression (5, 6) extending over the pulling member (4) and the outer part of the tear-off tag (2) connected to the pulling member.
Inventors
- 👤 Jan Berglund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:07
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/32; B65D41/40; B65D41/44
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
178 words
A tear tab closure for containers comprising a cap having a top wall, a downwardly depending skirt and score lines in the skirt and top wall defining a tear-off strip adapted to be torn out to open the closure, in which the improvement comprises a straight tear-off tag formed on said tear-off strip and extending downwardly from the skirt, and a separate pull ring secured at the bottom end of said tear-off tag, said tear-off tag having formed therein an outwardly projecting impression extending downwardly from about the level of the bottom of said skirt to said pull ring and formed at its lower end with a portion projecting outwardly from said pull ring, said portion being arranged to be moved into contacting relation to the outer surface of said impression when said ring is raised to fold it over said tear-off tag to establish a lever arm, to one end of which force is applied when said pull ring is raised to remove the tear strip, whereby tearing of said tear strip from the cap is facilitated.
Claim 2
Dependent Claim
178 words
A tear tab closure for containers comprising a cap having a top wall, a downwardly depending skirt and score lines in the skirt and top wall defining a tear-off strip adapted to be torn out to open the closure, in which the improvement comprises a straight tear-off tag formed on said tear-off strip and extending downwardly from the skirt, and a separate pull ring secured at the bottom end of said tear-off tag, said tear-off tag having formed therein an outwardly projecting impression extending downwardly from about the level of the bottom of said skirt to said pull ring and formed at its lower end with a portion projecting outwardly from said pull ring, said portion being arranged to be moved into contacting relation to the outer surface of said impression when said ring is raised to fold it over said tear-off tag to establish a lever arm, to one end of which force is applied when said pull ring is raised to remove the tear strip, whereby tearing of said tear strip from the cap is facilitated.
Claim 3
Dependent Claim
36 words
A tear tab closure as described in claim 1 in which the pull ring is curved so as to exert a force having a component transverse to said cap when the pull ring is pulled upwardly.
References Cited (Backward Citations)
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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) | 1987-06-12 | 1987-12-12 | 1988-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-12 | 1991-12-12 | 1992-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-12 | 1995-12-12 | 1996-06-12 | $7700.00 | Window Closed / Lapsed |