Patent US2596733A successfully refreshed from Google Patents.
Patent US3667643A successfully refreshed from Google Patents.
US3667643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Easy-lift pull tab
Assignee: Continental Can Co Inc
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Filing: 1970-12-28
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Granted: 1972-06-06
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Expires: 1990-12-28
Abstract
Abstract A pull tab for an easy opening container. The pull tab is of the type having a pair of fulcrum legs. The fulcrum legs are each formed with an extension of single layer of sheet metal which projects outwardly of the fulcrum ends of the legs.
Inventors
- 👤 Anilkumar J Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:03
CPC Classifications
B; B65; B65D; B65D17/00; B65D17/28; B65D17/401; B65D17/4012
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
127 words
In a pull tab of the lever type made from sheet metal and having a hemmed border to rigidify the same, said pull tab being secured to a container tear strip for effecting the removal thereof and wherein said pull tab at one end includes a pair of fulcrum leg and means for facilitating attachment to a container tear strip disposed between said legs and at the other end a ring portion to facilitate the lifting of said pull tab, the improvement comprising a single layer thickness of sheet metal projecting from said hemmed border to said fulcrum legs, and said hemmed border in each of said legs terminating in fulcrum ends disposed between the center line of said rivet and the end of said score line.
Claim 2
Dependent Claim
127 words
In a pull tab of the lever type made from sheet metal and having a hemmed border to rigidify the same, said pull tab being secured to a container tear strip for effecting the removal thereof and wherein said pull tab at one end includes a pair of fulcrum leg and means for facilitating attachment to a container tear strip disposed between said legs and at the other end a ring portion to facilitate the lifting of said pull tab, the improvement comprising a single layer thickness of sheet metal projecting from said hemmed border to said fulcrum legs, and said hemmed border in each of said legs terminating in fulcrum ends disposed between the center line of said rivet and the end of said score line.
Claim 3
Dependent Claim
22 words
The invention as defined in claim 1 wherein said single layer thickness is a continuation of a hem of said hemmed border.
Claim 4
Dependent Claim
20 words
The invention as defined in claim 2 wherein said hem extension is disposed along the underside of said hemmed border.
References Cited (Backward Citations)
US3432067A
Cited
US3437229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |