US3850339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triple score pressure relief system for an aerosol container
Assignee: Primerica Inc
•
Filing: 1973-05-07
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Granted: 1974-11-26
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Expires: 1993-05-07
Abstract
Abstract A two or three piece metal container is adapted to hold a pressurized product for dispensing through a valve mounted on the container. The container has a safety venting system therein, whereby the product may be vented from a filled pressurized container through the system when an increase in internal pressure threatens to blow the top or bottom off the container. The venting system comprises a plurality of triple scores formed in the seam where the container body is joined to the top closure of the container. When the internal pressure of a filled container increases sufficiently, the periphery of the top closure buckles outwardly causing the residual of the main score in the triple score to fracture and thus produce a plurality of vents to permit the highly pressurized contents of the sealed container to safely escape and prevent end blow-off.
Inventors
- 👤 C Kinkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:45
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/70
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
148 words
In a pressurized aerosol dispenser container having a tubular body closed at one end and a metal end wall closing the other end, the end wall being secured to the tubular body by an annular convoluted seam, the improvement for safely venting excessive internal pressure, comprising: a plurality of venting scores, and an anti-fracture score flanking each side of each of said venting scores, said venting and anti-fracture scores penetrating partially through the metal of the end wall and extending from at least a portion of the most interior layer of the seam to the top portion of the seam, whereby when the internal pressure within the container increases and threatens to cause rupture of said containeR, the end wall will buckle outwardly causing the residual of said venting scores to fracture to thereby produce a plurality of vents to permit the pressurized contents to escape safely therethrough.
Claim 2
Dependent Claim
148 words
In a pressurized aerosol dispenser container having a tubular body closed at one end and a metal end wall closing the other end, the end wall being secured to the tubular body by an annular convoluted seam, the improvement for safely venting excessive internal pressure, comprising: a plurality of venting scores, and an anti-fracture score flanking each side of each of said venting scores, said venting and anti-fracture scores penetrating partially through the metal of the end wall and extending from at least a portion of the most interior layer of the seam to the top portion of the seam, whereby when the internal pressure within the container increases and threatens to cause rupture of said containeR, the end wall will buckle outwardly causing the residual of said venting scores to fracture to thereby produce a plurality of vents to permit the pressurized contents to escape safely therethrough.
Claim 3
Dependent Claim
21 words
The improvement of claim 1 wherein the tubular body is metal and the anti-fracture scores are shallower than the venting score.
Claim 4
Dependent Claim
21 words
The improvement of claim 2 wherein the closed end is formed by a separate end double seamed to the tubular body.
Claim 5
Dependent Claim
14 words
The improvement of claim 3 wherein the scores extend radially across the end wall.
Claim 6
Dependent Claim
11 words
The improvement of claim 4 wherein the closed end is concave.
Claim 7
Dependent Claim
18 words
The improvement of claim 5 wherein the scores are located on the interior of the metal end wall.
Claim 8
Dependent Claim
11 words
The improvement of claim 5 wherein the end wall is domed.
Claim 9
Dependent Claim
23 words
The improvement of claim 1 wherein the center-to-center spacing between the venting score and the anti-fracture scores is between 50 and 70 mils.
Claim 10
Dependent Claim
11 words
The improvement of claim 8 wherein the spacing is 60 mils.
Claim 11
Dependent Claim
24 words
The improvement of claim 9 wherein the difference in depth between the venting and anti-fracture scores is on the order of about 3 mils.
Claim 12
Dependent Claim
31 words
The improvement of claim 8 wherein the residual of the venting score is between 4 to 6 mils, and the residual of the anti-fracture scores is between 6 to 9 mils.
References Cited (Backward Citations)
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US2795350A
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US3074602A
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US3029987A
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US3292826A
Cited
US3450305A
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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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |