US4190189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure member for a container
Assignee: Phillips Petroleum Co
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Filing: 1978-04-17
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Granted: 1980-02-26
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Expires: 1998-04-17
Abstract
Abstract A closure member, for a container, formed from corrugated paperboard, plastic, or other similar substance is provided. The closure member increases the strength of the container and the rigidity of the container sidewalls. In a preferred embodiment of the invention the edges of the closure member are flattened and formed into a depending skirt. The edge of the container sidewall is then rolled over the depending skirt to form a sealed unit. In a second embodiment of the invention, in which the edge of the closure member is not flattened, the closure member is inserted into the container and the edge of the container sidewall is rolled to form a support for the closure member. The edge of the closure member is sealed to the container sidewall in this second embodiment.
Inventors
- 👤 Laurence R. DeForest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:19
CPC Classifications
B; B65; B65D; B65D3/00; B65D3/10; B65D3/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
313 words
A container structure comprising: a corrugated closure member having a corrugated center layer bounded on opposite sides by inner and outer layer members, said corrugated closure member having a flattened peripheral marginal portion, said corrugated center layer being at least substantially crushed in said flattened peripheral marginal portion in such a manner that the crushed center layer is substantially in contact with said inner and said outer layer members, said flattened peripheral marginal portion being bent at an angle to the central portion of said corrugated closure member to form a depending skirt, the three plies formed by the crushed center layer substantially in contact with said inner and outer layer members extending at least from substantially the outer edge of said depending skirt to the angle formed between said flattened peripheral marginal portion and said central portion, said depending skirt extending completely around the periphery of said central portion; a single-ply container sidewall formed so as to have a geometrical cross section, transverse to the longitudinal axis of said container structure, at least generally corresponding to the surface area of the portion of said inner layer member in said central portion of said corrugated closure member, said single-ply container sidewall forming an opening on the longitudinal axis of said container structure, said corrugated closure member being positioned within the opening formed by said single-ply container sidewall so as to generally fill the opening formed by said single-ply container sidewall, said single-ply container sidewall having a marginal end portion, said marginal end portion projecting beyond the edge of said depending skirt which is opposite said central portion of said closure member, said marginal end portion extending inwardly to form a rolled rim around said depending skirt with the edge of said marginal end portion extending at least generally to the bend between said depending skirt and said central portion of said closure member.
Claim 2
Dependent Claim
313 words
A container structure comprising: a corrugated closure member having a corrugated center layer bounded on opposite sides by inner and outer layer members, said corrugated closure member having a flattened peripheral marginal portion, said corrugated center layer being at least substantially crushed in said flattened peripheral marginal portion in such a manner that the crushed center layer is substantially in contact with said inner and said outer layer members, said flattened peripheral marginal portion being bent at an angle to the central portion of said corrugated closure member to form a depending skirt, the three plies formed by the crushed center layer substantially in contact with said inner and outer layer members extending at least from substantially the outer edge of said depending skirt to the angle formed between said flattened peripheral marginal portion and said central portion, said depending skirt extending completely around the periphery of said central portion; a single-ply container sidewall formed so as to have a geometrical cross section, transverse to the longitudinal axis of said container structure, at least generally corresponding to the surface area of the portion of said inner layer member in said central portion of said corrugated closure member, said single-ply container sidewall forming an opening on the longitudinal axis of said container structure, said corrugated closure member being positioned within the opening formed by said single-ply container sidewall so as to generally fill the opening formed by said single-ply container sidewall, said single-ply container sidewall having a marginal end portion, said marginal end portion projecting beyond the edge of said depending skirt which is opposite said central portion of said closure member, said marginal end portion extending inwardly to form a rolled rim around said depending skirt with the edge of said marginal end portion extending at least generally to the bend between said depending skirt and said central portion of said closure member.
Claim 3
Dependent Claim
34 words
A container structure in accordance with claim 1 additionally comprising a fillet of sealing material at the general intersection of said inner layer of said corrugated closure member and said single ply container sidewall.
Claim 4
Dependent Claim
31 words
A container structure in accordance with claim 2 wherein said marginal end portion of said single ply container sidewall and said depending skirt of said corrugated closure member are bonded together.
Claim 5
Dependent Claim
52 words
A container structure in accordance with claim 3 wherein said surface area of the portion of said inner layer in said central portion of said corrugated closure member is circular and said geometrical cross section of said single ply container sidewall, transverse to the longitudinal axis of said container structure is circular.
Claim 6
Dependent Claim
18 words
A container structure in accordance with claim 4 wherein said rolled rim has at least 180° of curvature.
Claim 7
Dependent Claim
18 words
A container structure in accordance with claim 4 wherein said rolled rim has at least 270° of curvature.
Claim 8
Dependent Claim
31 words
A container structure in accordance with claim 1 wherein said marginal end portion of said single ply container sidewall and said depending skirt of said corrugated closure member are bonded together.
Claim 9
Dependent Claim
51 words
A container structure in accordance with claim 1 wherein said surface area of the portion of said inner layer in said central portion of said corrugated closure member is circular and said geometrical cross section of said single ply container sidewall, transverse to the longitudinal axis of said container, is circular.
Claim 10
Dependent Claim
18 words
A container structure in accordance with claim 1 wherein said rolled rim has at least 180° of curvature.
Claim 11
Dependent Claim
18 words
A container structure in accordance with claim 1 wherein said rolled rim has at least 270° of curvature.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-25 | 1983-08-27 | 1984-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-25 | 1987-08-27 | 1988-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-25 | 1991-08-27 | 1992-02-26 | $7700.00 | Window Closed / Lapsed |