Patent US3325697A successfully refreshed from Google Patents.
US4141464A
Expired / Lapsed
US
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Closure and method for easy opening of cans
Assignee: Arkema Inc
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Filing: 1978-05-23
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Granted: 1979-02-27
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Expires: 1998-05-23
Abstract
Abstract A can having a closure defined at least in part by a rupturable weakening line is provided with a finger-movable tab-like tool for safely opening the closure. The tool is a sheet metal lever pivotally attached to a can end in which the closure is deflectible and preferably non-severable. A depressor portion of the lever is raised from its prone or inoperative position and, in part, twisted about 90° to locate its pressure-directing beak adjacent to a point along the weakening line, whereupon downward finger pressure on the depressor portion disrupts the line and deflects the closure inwardly. The lever is so shaped that depression of the twistable portion is limited by engagement therewith of an edge of the opening thus barring finger entry into the can opening as a safety measure. The lever may be provided at its opposite end with a handle whereby, when the closure has been opened as explained, the lever may be swung to clear the depressed end portion substantially from the can opening.
Inventors
- 👤 John S. Kelley
- 👤 Albert E. Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:05
CPC Classifications
B; B65; B65D; B65D17/00; B65D17/28; B65D17/401; B65D17/4012
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
82 words
A can having an easy-open closure at least partly defined by a weakening line, and finger operable means comprising a lever secured to the can adjacent to the closure, the lever including a bendable sheet metal depressor portion movable by twisting from an inoperative position adjacent to the can to a position wherein a reduced width or pointed end of the depressor portion can be thrust against a point along said line to deflect and open the closure inwardly of the can.
Claim 2
Dependent Claim
82 words
A can having an easy-open closure at least partly defined by a weakening line, and finger operable means comprising a lever secured to the can adjacent to the closure, the lever including a bendable sheet metal depressor portion movable by twisting from an inoperative position adjacent to the can to a position wherein a reduced width or pointed end of the depressor portion can be thrust against a point along said line to deflect and open the closure inwardly of the can.
Claim 3
Dependent Claim
22 words
A can as in claim 1 wherein the closure is formed in an end thereof, and the lever is initially generally S-shaped.
Claim 4
Dependent Claim
68 words
A can as in claim 1 or 2 wherein the point of said line to be initially disrupted is disposed adjacent to a rim of an end of the can, the lever is secured to said end of the can at a locality across the closure from said point, and said depressor portion is twistable up to about 90° about an axis generally parallel to the can end.
Claim 5
Dependent Claim
41 words
A can as in claim 1 wherein said lever is pivotally secured to the can and comprises a handle portion for moving said depressor portion after the latter has been rocked to open the closure thus to largely clear the opening.
Claim 6
Dependent Claim
33 words
A can as in claim 2 wherein the depressor portion is formed with a flange spaced from its pointed end to accommodate finger pressure for causing said pointed end to disrupt said line.
Claim 7
Dependent Claim
52 words
A can as in claim 3 wherein the arrangement is such that the depressor portion, when twisted and bent to inwardly deflect the closure by finger-applied pressure, is barred by engagement with the can from entering the can opening to an extent wherein a finger can contact an edge of the opening.
Claim 8
Dependent Claim
60 words
A can as in claim 4 wherein the handle portion is formed with an upturned flange and a releasable detent, a protrusion formed in the can for cooperating with the detent, and a stop formed in the can and arranged to engage the handle flange to determine the initial position of the lever in cooperation with said detent and protrusion.
Claim 9
Dependent Claim
78 words
The combination with an easy-open can end of the type having a closure defined at least in part by a disruptible weakening line, of a closure operating lever pivotally secured to the can end, the lever being of generally thin and flat cross-section of facilitate bending and having a longitudinal curvature terminating in a beak for applying disrupting pressure to a point along said line when force is manually applied edgewise to a convex portion of said curvature.
Claim 10
Dependent Claim
78 words
The combination with an easy-open can end of the type having a closure defined at least in part by a disruptible weakening line, of a closure operating lever pivotally secured to the can end, the lever being of generally thin and flat cross-section of facilitate bending and having a longitudinal curvature terminating in a beak for applying disrupting pressure to a point along said line when force is manually applied edgewise to a convex portion of said curvature.
Claim 11
Independent Claim
80 words
A method for opening a can end having an easy opening closure defined by a weakening line, the method comprising providing an elongated, twistable lever of sheet metal, and securing the lever to the can end at one locality outside of the closure so that a free end of the lever initially in juxtaposition to the can end, can be brought manually to bear with pressure at a point along said line to progressively deflect the closure into the can.
Claim 12
Independent Claim
80 words
A method for opening a can end having an easy opening closure defined by a weakening line, the method comprising providing an elongated, twistable lever of sheet metal, and securing the lever to the can end at one locality outside of the closure so that a free end of the lever initially in juxtaposition to the can end, can be brought manually to bear with pressure at a point along said line to progressively deflect the closure into the can.
Claim 13
Dependent Claim
48 words
The method of claim 9 further characterized in that the shapes of the lever and the closure are selected to prevent depression of the lever into the opened can to an extent wherein a finger manipulating the lever could contact an edge of the can opening with abrasion.
Claim 14
Independent Claim
106 words
A method of making a device attachable to an easy-open can end of the type comprising a closure defined by a weakening line, the method including: 1. providing a finger-bendable strip of flat sheet metal of general S-shape having a depressor portion with a beak formed on one end and a handle portion on the other end; 2. providing between said portions a formation for effecting pivotal connection to the can end to initially hold the device substantially parallel to the can end; and 3. forming a flange on a convex section of the depressor portion for accommodating finger pressure substantially normal to the can end.
Claim 15
Independent Claim
106 words
A method of making a device attachable to an easy-open can end of the type comprising a closure defined by a weakening line, the method including: 1. providing a finger-bendable strip of flat sheet metal of general S-shape having a depressor portion with a beak formed on one end and a handle portion on the other end; 2. providing between said portions a formation for effecting pivotal connection to the can end to initially hold the device substantially parallel to the can end; and 3. forming a flange on a convex section of the depressor portion for accommodating finger pressure substantially normal to the can end.
Claim 16
Dependent Claim
46 words
The method of claim 11 and selecting the curvature of said convex section to provide interference with an edge of the closure upon its being opened by force exerted thereon by the beak whereby entry of the depressor portion into the can end opening is limited.
Claim 17
Dependent Claim
103 words
A can end comprising a closure at least partly defined by a scoring line extending through a rupturable locality adjacent to the perimeter of the can end, and an elongated, twistable strip of sheet metal non-detachably connected to the can end adjacent to a radially inner edge of an opening to be made therein upon force being exerted against said locality by a point end of the strip, after the strip has been lifted in a flanged mid-portion from the can end and pressure manually applied to said mid-portion to move the pointed end and thus deflect the closure inwardly of the can.
Claim 18
Dependent Claim
103 words
A can end comprising a closure at least partly defined by a scoring line extending through a rupturable locality adjacent to the perimeter of the can end, and an elongated, twistable strip of sheet metal non-detachably connected to the can end adjacent to a radially inner edge of an opening to be made therein upon force being exerted against said locality by a point end of the strip, after the strip has been lifted in a flanged mid-portion from the can end and pressure manually applied to said mid-portion to move the pointed end and thus deflect the closure inwardly of the can.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |