US3643833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Easy opening container wall
Assignee: Individual
•
Filing: 1969-11-04
•
Granted: 1972-02-22
•
Expires: 1989-11-04
Abstract
Abstract An easy opening container wall including a main score line in the container wall defining a panel removable therefrom and a tab connected to the panel to initiate severance of the panel. A plurality of generally radially extending secondary score lines are formed in the panel and sections of the panel are preferably axially offset relative to each other.
Inventors
- 👤 Ermal C Fraze
- 👤 Franklin C Eickenhorst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:30
CPC Classifications
B; B65; B65D; B65D17/00; B65D17/28; B65D17/401; B65D17/4011
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
184 words
In an easy opening container wall wherein a line of weakness is formed in a container wall to define a panel at least partially removable from the container wall and a tab is connected to the container wall to initiate severance of the panel from the container wall and wherein the container wall is subjected to a force prior to manipulation of the tab which stresses the line of weakness, the improvement to reduce the amount of stress which will be absorbed by the container wall at the line of weakness in response to the application of the force to the container wall comprising: the panel being weakened at selected regions thereof with the weakened regions of said panel absorbing some of the stress resulting from said force to thereby reduce the amount of stress which is absorbed by said line of weakness, Said panel being nonrupturable at said selected regions by manipulation of the tab, said panel including first and second panel sections offset axially from each other and at least one of the weakened regions lies partially in both of said sections.
Claim 2
Dependent Claim
184 words
In an easy opening container wall wherein a line of weakness is formed in a container wall to define a panel at least partially removable from the container wall and a tab is connected to the container wall to initiate severance of the panel from the container wall and wherein the container wall is subjected to a force prior to manipulation of the tab which stresses the line of weakness, the improvement to reduce the amount of stress which will be absorbed by the container wall at the line of weakness in response to the application of the force to the container wall comprising: the panel being weakened at selected regions thereof with the weakened regions of said panel absorbing some of the stress resulting from said force to thereby reduce the amount of stress which is absorbed by said line of weakness, Said panel being nonrupturable at said selected regions by manipulation of the tab, said panel including first and second panel sections offset axially from each other and at least one of the weakened regions lies partially in both of said sections.
Claim 3
Dependent Claim
156 words
In an easy opening container wall wherein a main line of weakness is formed in a container wall to define a panel at least partially removable from the container wall and a tab is connected to the container wall to initiate severance of the panel from the container wall, the improvement comprising: a plurality of secondary lines of weakness in said panel, said panel being nonrupturable along said secondary lines of weakness in response to manipulation of the tab to sever the main line of weakness; and each of said secondary lines of weakness beginning at a location spaced from the center of said panel and extending generally radially outwardly toward the main line of weakness to terminate in spaced relationship to said main line of weakness, said panel including first and second axially offset sections with at least one of said secondary lines of weakness extending at least part way across both of said sections.
Claim 4
Dependent Claim
156 words
In an easy opening container wall wherein a main line of weakness is formed in a container wall to define a panel at least partially removable from the container wall and a tab is connected to the container wall to initiate severance of the panel from the container wall, the improvement comprising: a plurality of secondary lines of weakness in said panel, said panel being nonrupturable along said secondary lines of weakness in response to manipulation of the tab to sever the main line of weakness; and each of said secondary lines of weakness beginning at a location spaced from the center of said panel and extending generally radially outwardly toward the main line of weakness to terminate in spaced relationship to said main line of weakness, said panel including first and second axially offset sections with at least one of said secondary lines of weakness extending at least part way across both of said sections.
Claim 5
Dependent Claim
134 words
In an easy opening container wall wherein a main line of weakness is formed in a container wall to define a panel at least partially removable from the container wall and a tab is connected to the container wall to initiate severance of the panel from the container wall, the improvement comprising: a plurality of secondary lines of weakness in said panel, said panel being nonrupturable along said secondary lines of weakness in response to manipulation of the tab to sever the main line of weakness; and said panel including inner, outer and intermediate sections with said intermediate section substantially circumscribing said inner section and with said outer section substantially circumscribing said intermediate section said sections being axially offset from each other, said secondary score lines extending substantially across said outer and intermediate sections.
Claim 6
Dependent Claim
134 words
In an easy opening container wall wherein a main line of weakness is formed in a container wall to define a panel at least partially removable from the container wall and a tab is connected to the container wall to initiate severance of the panel from the container wall, the improvement comprising: a plurality of secondary lines of weakness in said panel, said panel being nonrupturable along said secondary lines of weakness in response to manipulation of the tab to sever the main line of weakness; and said panel including inner, outer and intermediate sections with said intermediate section substantially circumscribing said inner section and with said outer section substantially circumscribing said intermediate section said sections being axially offset from each other, said secondary score lines extending substantially across said outer and intermediate sections.
Claim 7
Dependent Claim
140 words
An easy opening container wall comprising: a container wall of sheet material having a main score line therein defining a main residual web, said main residual web defining a panel at least partially removable from the container wall, said panel covering a major portion of said container wall; a tab attached to said panel to initiate removal of said panel from said container wall by rupturing said residual web; said panel having a plurality of secondary score lines therein, each of said secondary score lines defining a secondary residual web of greater thickness than said main residual web; and said panel having an inner section, each of said secondary score lines extending generally radially from a location closely adjacent said inner section to a location closely adjacent the main score line, said secondary score lines being substantially equally spaced circumferentially.
Claim 8
Dependent Claim
140 words
An easy opening container wall comprising: a container wall of sheet material having a main score line therein defining a main residual web, said main residual web defining a panel at least partially removable from the container wall, said panel covering a major portion of said container wall; a tab attached to said panel to initiate removal of said panel from said container wall by rupturing said residual web; said panel having a plurality of secondary score lines therein, each of said secondary score lines defining a secondary residual web of greater thickness than said main residual web; and said panel having an inner section, each of said secondary score lines extending generally radially from a location closely adjacent said inner section to a location closely adjacent the main score line, said secondary score lines being substantially equally spaced circumferentially.
Claim 9
Dependent Claim
19 words
An improvement as defined in claim 3 wherein said secondary lines of weakness extend generally radially of the panel.
Claim 10
Dependent Claim
34 words
An improvement as defined in claim 5 wherein each of said secondary lines of weakness terminates short of said main line of weakness, said secondary lines of weakness being spaced circumferentially of the panel.
Claim 11
Dependent Claim
52 words
An improvement as defined in claim 2 wherein the main line of weakness defines a main rupturable web and each of the secondary lines of weakness defines a secondary rupturable web, a major portion of the main rupturable web being thinner than major portions of a majority of the secondary rupturable webs.
References Cited (Backward Citations)
US3485410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |