Patent US4148410A successfully refreshed from Google Patents.
US4148410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tab for easy-open ecology end
Assignee: Dayton Reliable Tool and Manufacturing Co
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Filing: 1978-01-30
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Granted: 1979-04-10
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Expires: 1998-01-30
Abstract
Abstract When the improved tab is lifted by its lifting end, its opening end ruptures a scored line defining a panel, and this opens the container. The tab is retained to the container by a flap extending from the opening end toward the lifting end and including an affixing portion which is riveted to the container. After the container has been opened, the lifting end of the tab is depressed toward the end of the container. In prior art tabs, flexing of the flap occurred at a first bending region adjacent the affixing portion during both the lifting and depressing motions. In contrast, in the present invention the flap is shaped to provide a second bending region adjacent the opening end, in addition to the first bending region adjacent the affixing portion. When the lifting end is lifted, the improved tab flexes in the first bending region, and when the lifting end is depressed, the improved tab flexes in the second bending region. In this manner the flexing is shared between the first and the second bending regions.
Inventors
- 👤 Omar L. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:10
CPC Classifications
B; B65; B65D; B65D17/00; B65D17/28; B65D17/401; B65D17/4012
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
234 words
A tab of the type affixed to a can end for opening it and comprising: a unitary structure including a lifting end; an opening end opposite said lifting end and spaced from it; spaced leg members connecting said lifting end and said opening end; and, a flap extending longitudinally from said opening end toward said lifting end between said spaced leg members, spaced from said spaced leg members and from said lifing end, including an affixing portion by which said flap is affixed to the can end, said affixing portion spaced from said opening end, the width of said flap varying along the length of said flap to define a first bending region extending laterally across said flap adjacent said affixing portion and a second bending region extending laterally across said flap adjacent said opening end, the width of said flap in said second bending region being sufficiently small relative to the width of said flap in said first bending region that after said lifting end has been pulled away from the can, thereby flexing said flap in said first bending region, when said lifting end is subsequently pushed toward the can end, said flap flexes in said second bending region, whereby no part of said flap is flexed more than once as said lifting end is pulled away from the can and then pushed back towards its original position adjacent the can end.
Claim 2
Dependent Claim
234 words
A tab of the type affixed to a can end for opening it and comprising: a unitary structure including a lifting end; an opening end opposite said lifting end and spaced from it; spaced leg members connecting said lifting end and said opening end; and, a flap extending longitudinally from said opening end toward said lifting end between said spaced leg members, spaced from said spaced leg members and from said lifing end, including an affixing portion by which said flap is affixed to the can end, said affixing portion spaced from said opening end, the width of said flap varying along the length of said flap to define a first bending region extending laterally across said flap adjacent said affixing portion and a second bending region extending laterally across said flap adjacent said opening end, the width of said flap in said second bending region being sufficiently small relative to the width of said flap in said first bending region that after said lifting end has been pulled away from the can, thereby flexing said flap in said first bending region, when said lifting end is subsequently pushed toward the can end, said flap flexes in said second bending region, whereby no part of said flap is flexed more than once as said lifting end is pulled away from the can and then pushed back towards its original position adjacent the can end.
Claim 3
Dependent Claim
156 words
In a unitary tab of the type affixed to a can end for opening it and having a lifting end opposite an opening end, and having spaced leg members connecting the opposite ends, the improvement comprising: a flap extending from the opening end toward the lifting end between the spaced leg members, spaced from the spaced leg members and from the lifting end, and including an affixing portion by which said flap is affixed to the can end, said affixing portion spaced from the opening end, the width of said flap increasing along the length of said flap between the opening end and said affixing portion so that flexing of said flap is distributed along the length of said flap between the opening end and said affixing portion when the lifting end of the tab is first lifted away from the can end and then pushed back towards it, whereby repeated localized flexing is substantially avoided.
Claim 4
Dependent Claim
156 words
In a unitary tab of the type affixed to a can end for opening it and having a lifting end opposite an opening end, and having spaced leg members connecting the opposite ends, the improvement comprising: a flap extending from the opening end toward the lifting end between the spaced leg members, spaced from the spaced leg members and from the lifting end, and including an affixing portion by which said flap is affixed to the can end, said affixing portion spaced from the opening end, the width of said flap increasing along the length of said flap between the opening end and said affixing portion so that flexing of said flap is distributed along the length of said flap between the opening end and said affixing portion when the lifting end of the tab is first lifted away from the can end and then pushed back towards it, whereby repeated localized flexing is substantially avoided.
Claim 5
Dependent Claim
21 words
The improvement of claim 2 wherein said flap is generally tapered in width between the opening end and said affixing portion.
Claim 6
Dependent Claim
70 words
The improvement of claim 2 wherein said flap is sufficiently narrow adjacent the opening end that after the lifting end has been pulled away from the can end thereby bending said flap in a first bending region of it located adjacent said affixing region, when the lifting end is subsequently pushed toward the can end said flap bends in a second bending region of it located adjacent the opening end.
References Cited (Backward Citations)
US3977561A
Cited
US4039100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |