Patent US4297477A successfully refreshed from Google Patents.
Patent US3416221A successfully refreshed from Google Patents.
US3416221A
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Method of pre-forming and attaching metal pull tab to metal can end rivet formation
Assignee: Continental Can Co Inc
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Filing: 1963-11-01
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Granted: 1968-12-17
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Expires: 1983-11-01
Abstract
No abstract record available.
Inventors
- 👤 John Henchert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:35
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/38; B21D51/383; B62; B62J; B62J11/00; B62J11/02; B65; B65D; B65D17/00; B65D17/28; B65D17/401; B65D17/4012; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49925; Y10T29/49934; Y10T29/49938; Y10T29/49943
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
158 words
A METHOD OF SECURING A PULL TAB TO A TEAR STRIP OF A CONTAINER MEMBER, SAID METHOD COMPRISING THE STEPS OF SHAPING THE CONTAINER MEMBER TO HAVE AN INTEGRAL TUBULAR RIVET HAVING FREE END AND A BASE END CONNECTED TO THE CONTAINER MEMBER, FORMING AN OPENING IN THE PULL TAB OF A DIAMETER TO SNGULY RECEIVE THE RIVET BASE END, DEFORMING THE PULL TAB AROUND THE OPENING THEREIN TO DEFINE A FLARED FLANGE SURROUNDING THE OPENING WITH THE OPENING BEING OFFSET FROM THE ORIGINAL POSITION THEREOF AND THE DIAMETER OF THE OPENING INCREASED TO RECEIVE THE RIVET FREE END, POSITIONING THE PULL TAB ON THE RIVET, FLATTENING THE FLANGE OF THE PULL TAB TO REDUCE THE DIAMETER OF THE PULL TAB OPENING WITH THE PULL TAB GRIPPING THE RIVET BASE END, SAID CRIMPING THE RIVET FREE END OVER THE PULL TAB AROUND THE PULL TAB OPENING TO FURTHER AND SECURELY ATTACH THE PULL TAB TO THE CONTAINER MEMBER.
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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) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |