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US3795341A Expired / Lapsed US ⏱️ 0.0 years remaining

Easy opening container

Assignee: Continental Can Co Inc
•
Filing: 1972-07-13
•
Granted: 1974-03-05
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Expires: 1992-07-13
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Abstract

Abstract An easy opening container including an end closure having a primary score line terminating in spaced ends so as to define a non-detachable tear portion. A secondary score line defining a lever section is formed in the removable panel section and a rigidifying bead is located on the lever section. Upon lifting of the lever section initial severance of the primary score line occurs. A pull tab is attached to the lever section.

Inventors

  • 👤 O Ostrem

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 15:57
CPC Classifications
B; B65; B65D; B65D17/00; B65D17/28; B65D17/401; B65D17/4012

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 241 words
An end closue for a container, said end closure comprising a panel, a primary score line terminating in spaced ends and defining a removable panel portion bendable about a line passing through said spaced ends an auxiliary score line disposed in said removable panel portion and defining a lever section substantially bisecting said removable panel portion between said spaced ends, said suxiliary score line having spaced legs terminating at ends located adjacent to said primary score line and a bight connecting the other ends of said legs located adjacent said line passing through said spaced ends of said primary score line, and means formed in said panel between said legs of said auxiliary score line to render said lever section substantially rigid adjacent said primary score line, and pull tab means attached to said lever section adjacent to said bight for severing said secondary score line and tilting said lever section upwardly out of the plane of said removable panel portion, said pull tab means extending from and in alignment with said lever section so as to overlie said panel whereby rigidified lever section initiates severance of said primary score line, and upon further upward pulling of said pull tab means said separable panel section is separated from said panel along the length of said prmary score line and bent about said line passing through said spaced ends of said primary score line to provide a pour opening in said panel.
Claim 2
Dependent Claim 241 words
An end closue for a container, said end closure comprising a panel, a primary score line terminating in spaced ends and defining a removable panel portion bendable about a line passing through said spaced ends an auxiliary score line disposed in said removable panel portion and defining a lever section substantially bisecting said removable panel portion between said spaced ends, said suxiliary score line having spaced legs terminating at ends located adjacent to said primary score line and a bight connecting the other ends of said legs located adjacent said line passing through said spaced ends of said primary score line, and means formed in said panel between said legs of said auxiliary score line to render said lever section substantially rigid adjacent said primary score line, and pull tab means attached to said lever section adjacent to said bight for severing said secondary score line and tilting said lever section upwardly out of the plane of said removable panel portion, said pull tab means extending from and in alignment with said lever section so as to overlie said panel whereby rigidified lever section initiates severance of said primary score line, and upon further upward pulling of said pull tab means said separable panel section is separated from said panel along the length of said prmary score line and bent about said line passing through said spaced ends of said primary score line to provide a pour opening in said panel.
Claim 3
Dependent Claim 55 words
The invention as defined in claim 1 wherein said primary score line is generally U-shaped with the open end of said U disposed adjacent the center of said panel, and wherein said auxiliary score line is generally U-shaped with the open end of said U facing the looped end of said U-shaped primary score line.
Claim 4
Dependent Claim 39 words
The invention as defined in claim 1 wherein sai means rendering said lever rigid comprises a bead disposed between said legs of said secondary score and terminating at one end adjacent the looped end of said U-shaped score line.
Claim 5
Dependent Claim 22 words
The invention as defined in claim 3 wherein said pull tab includes a pair of fulcrum legs straddling said secondary score line.

References Cited (Backward Citations)

US3411661A Cited
US3386614A Cited
US3442416A Cited
US3401824A Cited
US3494141A Cited
US3643832A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-03-04 1977-09-03 1978-03-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-03-04 1981-09-03 1982-03-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-03-04 1985-09-03 1986-03-05 $7700.00 Window Closed / Lapsed

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