US3696961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective edge for easy opening container
Assignee: Continental Can Co Inc
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Filing: 1970-10-20
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Granted: 1972-10-10
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Expires: 1990-10-20
Abstract
Abstract An easy opening container in which the end closure is formed with annular fold bands. A weakening line to define a removable panel portion is formed in the central panel slightly outboard of the folded smooth edge of the annular fold bands so that the folded edge protects the user from the sharp edges after removal of the removable panel portion. This disclosure also relates to a method for forming the above described easy opening end closure wherein the weakening line is formed in the end panel prior to complete formation of the fold band.
Inventors
- 👤 Albert J Holk Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:48
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/38; B21D51/383; B65; B65D; B65D17/00; B65D17/28; B65D17/401; B65D17/4011; Y; Y10; Y10S; Y10S220/00; Y10S220/906
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
162 words
An easy opening container comprising an end closure having a panel and an upstanding chuck wall, said panel being folded to provide a double folded annular band, a weakening line formed in said panel defining a removable panel portion and a panel ledge extending from said chuck wall, said folded annular band having an inner periphery defined by a turned smooth edge, a pull tab fixed to said removable panel portion for separating said removable panel portion from said panel along said weakening line, said weakening line being located so that said folded annular band is disposed on said panel ledge after removal of said removable panel portion whereby said turned smooth edge provides a protective edge along the severed edge of said weakening line on said panel ledge, and a plastic band adhered to said panel for removal with said removable panel portion for providing a protective edge along the severed edge of said weakening line on said removable panel portion.
Claim 2
Dependent Claim
162 words
An easy opening container comprising an end closure having a panel and an upstanding chuck wall, said panel being folded to provide a double folded annular band, a weakening line formed in said panel defining a removable panel portion and a panel ledge extending from said chuck wall, said folded annular band having an inner periphery defined by a turned smooth edge, a pull tab fixed to said removable panel portion for separating said removable panel portion from said panel along said weakening line, said weakening line being located so that said folded annular band is disposed on said panel ledge after removal of said removable panel portion whereby said turned smooth edge provides a protective edge along the severed edge of said weakening line on said panel ledge, and a plastic band adhered to said panel for removal with said removable panel portion for providing a protective edge along the severed edge of said weakening line on said removable panel portion.
Claim 3
Dependent Claim
135 words
An easy opening container comprising an end closure having a panel and an upstanding chuck wall, said panel being folded to provide a double folded annular band, a weakening line formed in said panel defining a removable panel portion and a panel ledge projecting from said chuck wall, saiD folded annular band having a periphery defined by a turned smooth edge to provide a protective edge, a pull tab fixed to said removable panel portion for removing said removable panel portion from said panel along said weakening line, said weakening line being located so that said folded annular band is disposed on said removable panel portion upon removal of said removable panel portion whereby said turned smooth edge provides a protective edge along the severed edge of said weakening line on said removable panel portion.
Claim 4
Dependent Claim
135 words
An easy opening container comprising an end closure having a panel and an upstanding chuck wall, said panel being folded to provide a double folded annular band, a weakening line formed in said panel defining a removable panel portion and a panel ledge projecting from said chuck wall, saiD folded annular band having a periphery defined by a turned smooth edge to provide a protective edge, a pull tab fixed to said removable panel portion for removing said removable panel portion from said panel along said weakening line, said weakening line being located so that said folded annular band is disposed on said removable panel portion upon removal of said removable panel portion whereby said turned smooth edge provides a protective edge along the severed edge of said weakening line on said removable panel portion.
Claim 5
Dependent Claim
54 words
The invention as defined in claim 1 wherein a plastic band is adhered to said panel so as to remain attached to said panel ledge after removal of said removable panel portion, said plastic band providing a protective edge along the severed edge of said panel ledge after removal of said removable panel portion.
Claim 6
Dependent Claim
153 words
An easy opening container comprising an end closure having a panel and a chuck wall, said panel being folded to provide a stacked pair of double folded annular bands having a fold band common to said pair, said double folded annular bands each having a periphery defined by turned smooth edges, said turned smooth edges being located on opposite sides of said common panel, a weakening line formed on said common fold panel defining a removable panel portion and a panel ledge extending from said chuck wall and located so that said respective turned smooth edges provide protective edges along the severed edge of said weakening line on said removable panel portion and the severed edge on said panel ledge when said removal panel portion is removed from said panel, and a pull tab fixed to said removable panel portion for removing said removable panel portion from said panel along said weakening line.
Claim 7
Dependent Claim
153 words
An easy opening container comprising an end closure having a panel and a chuck wall, said panel being folded to provide a stacked pair of double folded annular bands having a fold band common to said pair, said double folded annular bands each having a periphery defined by turned smooth edges, said turned smooth edges being located on opposite sides of said common panel, a weakening line formed on said common fold panel defining a removable panel portion and a panel ledge extending from said chuck wall and located so that said respective turned smooth edges provide protective edges along the severed edge of said weakening line on said removable panel portion and the severed edge on said panel ledge when said removal panel portion is removed from said panel, and a pull tab fixed to said removable panel portion for removing said removable panel portion from said panel along said weakening line.
Claim 8
Dependent Claim
23 words
The invention as defined in claim 4 wherein said pair of double fold bands are stacked on the outer side of said panel.
Claim 9
Dependent Claim
22 words
The invention as defined in claim 4 wherein said pair of double fold bands are stacked on the underside of said panel.
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |