US3865263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure cap
Assignee: U M P PLASTICS Ltd
•
Filing: 1973-10-10
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Granted: 1975-02-11
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Expires: 1993-10-10
Abstract
Abstract This invention concerns a closure cap adapted to seal the neck of a container, the closure cap being formed of a moulding of elastomeric material and having a top portion, an annular skirt which extends from the periphery of the top portion, an abutment portion of said skirt which is adapted firmly to engage said neck to releasably retain the closure cap thereon, and an annular resilient flange portion which extends from and radially inwardly of the skirt and which is spaced from the internal surface of the said top portion by an annular groove, the resilient flange portion having a surface, at least partly convexly curved, which is remote from the top portion and which, even when the resilient flange portion is undeformed, is radially inwardly inclined towards the top portion, the resilient flange portion, when the cap is fitted to the container, effecting a primary sealing engagement with a radially outer edge of the end portion of the neck and a secondary engagement with the top surface of the end portion of the neck, and the resilient flange portion being deflectable into engagement with the internal surface of the top portion to trap a pocket of air therebetween.
Inventors
- 👤 Ralph William Birch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:37
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/02; B65D41/04; B65D41/0407; B65D41/0428; B65D41/16; B65D41/18; Y; Y10; Y10S; Y10S215/00; Y10S215/01
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
197 words
A closure cap adapted to seal the neck of a container, the closure cap being formed of a moulding of elastomeric material and having a top portion, an annular skirt which extends from the periphery of the top portion, an abutment portion of said skirt which is adapted firmly to engage said neck to releasably retain the closure cap thereon, and an annular resilient flange portion which extends from and radially inwardly of the skirt and which is spaced from the internal surface of the said top portion by an annular groove, the resilient flange portion haVing a surface, at least partly convexly curved, which is remote from the top portion and which, even when the resilient flange portion is undeformed, is radially inwardly inclined towards the top portion, the resilient flange portion, when the cap is fitted to the container, effecting a primary sealing engagement with a radially outer edge of the end portion of the neck and a secondary engagement with the top surface of the end portion of the neck, and the resilient flange portion being deflectable into engagement with the internal surface of the top portion to trap a pocket of air therebetween.
Claim 2
Dependent Claim
197 words
A closure cap adapted to seal the neck of a container, the closure cap being formed of a moulding of elastomeric material and having a top portion, an annular skirt which extends from the periphery of the top portion, an abutment portion of said skirt which is adapted firmly to engage said neck to releasably retain the closure cap thereon, and an annular resilient flange portion which extends from and radially inwardly of the skirt and which is spaced from the internal surface of the said top portion by an annular groove, the resilient flange portion haVing a surface, at least partly convexly curved, which is remote from the top portion and which, even when the resilient flange portion is undeformed, is radially inwardly inclined towards the top portion, the resilient flange portion, when the cap is fitted to the container, effecting a primary sealing engagement with a radially outer edge of the end portion of the neck and a secondary engagement with the top surface of the end portion of the neck, and the resilient flange portion being deflectable into engagement with the internal surface of the top portion to trap a pocket of air therebetween.
Claim 3
Dependent Claim
195 words
A container having a neck provided with a closure cap which is formed of a moulding of elastomeric material and which is fully seated on the neck, the closure cap having a top portion, an annular skirt which extends from the periphery of the top portion, an abutment portion of said skirt which firmly engages said neck to releasably retain the closure cap thereon, and an annular resilient flange portion which extends from and radially inwardly of the skirt and which is spaced from the internal surface of said top portion by an annular groove, the resilient flange portion having a surface at least partly convexly curved, which is remote from the top portion and which, even when the resilient flange portion is undeformed, is radially inwardly inclined towards the top portion, the resilient flange portion being deformed by the neck and effecting a primary sealing engagement with a convexly curved radially outer edge of the end portion of the neck and a secondary engagement with the top surface of the end portion of the neck, the resilient flange portion engaging the internal surface of the top portion and trapping a pocket of air therebetween.
Claim 4
Dependent Claim
195 words
A container having a neck provided with a closure cap which is formed of a moulding of elastomeric material and which is fully seated on the neck, the closure cap having a top portion, an annular skirt which extends from the periphery of the top portion, an abutment portion of said skirt which firmly engages said neck to releasably retain the closure cap thereon, and an annular resilient flange portion which extends from and radially inwardly of the skirt and which is spaced from the internal surface of said top portion by an annular groove, the resilient flange portion having a surface at least partly convexly curved, which is remote from the top portion and which, even when the resilient flange portion is undeformed, is radially inwardly inclined towards the top portion, the resilient flange portion being deformed by the neck and effecting a primary sealing engagement with a convexly curved radially outer edge of the end portion of the neck and a secondary engagement with the top surface of the end portion of the neck, the resilient flange portion engaging the internal surface of the top portion and trapping a pocket of air therebetween.
Claim 5
Dependent Claim
21 words
A container as claimed in claim 2 in which the whole of the internal surface of the top portion is flat.
Claim 6
Dependent Claim
32 words
A container as claimed in claim 2 in which the abutment portion is adapted to be both snapped over and to be removed from an abutment on the neck of the container.
Claim 7
Dependent Claim
34 words
A container as claimed in claim 2 in which the abutment portion comprises an internally threaded part of the skirt which is adapted to be screwed onto an externally threaded portion of the neck.
Claim 8
Dependent Claim
26 words
A container as claimed in claim 2 in which the outside diameter of the annular groove is less than the major internal diameter of the skirt.
References Cited (Backward Citations)
US3203571A
Cited
US3224617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |