US3713545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Venting closure
Assignee: Alcoa Corp
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Filing: 1971-09-14
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Granted: 1973-01-30
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Expires: 1991-09-14
Abstract
Abstract A sheet metal container closure is provided which has a top panel and a depending skirt for affixation to a container and a sealing liner of resilient deformable material underlying the top panel of the closure for sealing against a sealing surface of the container, and further having a score line centrally located in the top panel of the closure, which score line is rupturable by excessive pressure in a container on which the closure is sealed to provide an aperture in the top panel of the closure through which a portion of the sealing liner can be forced to permit gas to escape from the container between the sealing liner and the sealing surface of the container.
Inventors
- 👤 K Lawrence
- 👤 J Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:25
CPC Classifications
B; B65; B65D; B65D51/00; B65D51/16; B65D51/1633; B65D51/1661; B65D41/00; B65D41/02; B65D41/04; B65D41/0435; B65D41/045; B65D51/1638; G; G01; G01S; G01S1/00; G01S1/02; G01S1/022; G01S1/024; G01S1/08; G01S1/38; H; H03; H03D; H03D3/00; H03D3/02; H03D3/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
117 words
In a sheet metal container closure having a top panel and a depending skirt for affixation to a container and having a sealing liner or resilient deformable material underlying the top panel of the closure for sealing against a sealing surface of a container, the improvement comprising a score line centrally located in the top panel of the closure and cut through a portion of the metal thickness, said score line being rupturable by excessive pressure in a container on which the closure is sealed to provide an aperture in the top panel of the closure for a portion of the sealing liner to be forced through and thereby facilitate venting of pressurized gases from the container.
Claim 2
Dependent Claim
117 words
In a sheet metal container closure having a top panel and a depending skirt for affixation to a container and having a sealing liner or resilient deformable material underlying the top panel of the closure for sealing against a sealing surface of a container, the improvement comprising a score line centrally located in the top panel of the closure and cut through a portion of the metal thickness, said score line being rupturable by excessive pressure in a container on which the closure is sealed to provide an aperture in the top panel of the closure for a portion of the sealing liner to be forced through and thereby facilitate venting of pressurized gases from the container.
Claim 3
Dependent Claim
117 words
In a sheet metal container closure having a top panel and a depending skirt for affixation to a container and having a sealing liner or resilient deformable material underlying the top panel of the closure for sealing against a sealing surface of a container, the improvement comprising a score line centrally located in the top panel of the closure and cut through a portion of the metal thickness, said score line being rupturable by excessive pressure in a container on which the closure is sealed to provide an aperture in the top panel of the closure for a portion of the sealing liner to be forced through and thereby facilitate venting of pressurized gases from the container.
Claim 4
Dependent Claim
117 words
In a sheet metal container closure having a top panel and a depending skirt for affixation to a container and having a sealing liner or resilient deformable material underlying the top panel of the closure for sealing against a sealing surface of a container, the improvement comprising a score line centrally located in the top panel of the closure and cut through a portion of the metal thickness, said score line being rupturable by excessive pressure in a container on which the closure is sealed to provide an aperture in the top panel of the closure for a portion of the sealing liner to be forced through and thereby facilitate venting of pressurized gases from the container.
Claim 5
Dependent Claim
15 words
A closure as set forth in claim 1 in which the score line is I-shaped.
Claim 6
Dependent Claim
21 words
A closure as set forth in claim 1 in which the sealing liner is cut from a sheet of polyvinyl chloride.
Claim 7
Dependent Claim
29 words
A closure as set forth in claim 1 in which the score line is cut through approximately two-thirds of the metal thickness in the top panel of the closure.
Claim 8
Dependent Claim
23 words
A closure as set forth in claim 1 in which the score is in the undersurface of the top panel of the closure.
Claim 9
Dependent Claim
106 words
In a container-closure combination including a container having a sealing surface and a closure having a top panel and a depending skirt affixed to the mouth of the container and a liner of resilient deformable material underlying the top panel of the closure and sealing against the sealing surface of the container, the improvement comprising a score line centrally located in the top panel of the closure being rupturable by excessive pressure in the container to provide an aperture in the top panel of the closure through which a portion of the sealing liner is forced to facilitate the venting of excessive pressures from the container.
Claim 10
Dependent Claim
106 words
In a container-closure combination including a container having a sealing surface and a closure having a top panel and a depending skirt affixed to the mouth of the container and a liner of resilient deformable material underlying the top panel of the closure and sealing against the sealing surface of the container, the improvement comprising a score line centrally located in the top panel of the closure being rupturable by excessive pressure in the container to provide an aperture in the top panel of the closure through which a portion of the sealing liner is forced to facilitate the venting of excessive pressures from the container.
Claim 11
Dependent Claim
47 words
A container-closure combination as set forth in claim 6 in which the container has a top sealing surface and a side sealing surface against which the liner is sealed, and between which gases are vented when the score is ruptured in the top panel of the closure.
Claim 12
Dependent Claim
39 words
A container-closure combination as set forth in claim 7 in which the marginal edge portion of the top panel of the closure and the liner have been deformed downward and inward against the side sealing surface of the container.
Claim 13
Dependent Claim
22 words
A container-closure combination as set forth in claim 6 in which the score in the top panel of the closure is I-shaped.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |