US3851782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container closure with vent opening means
Assignee: Alcoa Corp
•
Filing: 1972-08-18
•
Granted: 1974-12-03
•
Expires: 1992-08-18
Abstract
Abstract A container wall or end closure is provided which has a hollow upwardly convex embossment formed in it, and at least one radially extending score line in an outer portion of the embossment which will be ruptured to form a vent opening in the closure when force is applied against the center of the embossment. The container wall may further include an inclined wall formed therein around the periphery of the embossment and a thinned zone or band of material in such wall to facilitate rupture of the score in the embossment. A method of forming such a container closure is also provided.
Inventors
- 👤 R Clawson
- 👤 W Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:53
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/38; B21D51/383; B65; B65D; B65D17/00; B65D17/28; B65D17/404
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
90 words
A metal container wall which includes a vent opening means comprising a hollow flexible embossment of generally hemispherical shape formed integrally in said container wall, an integral annular wall around said embossment extending at an angle from the outer periphery thereof to said container wall around the embossment to permit radial expansion of the embossment in response to pressure applied thereagainst, and further having at least one radially extending weakening line in the outer periphery of the embossment which is adapted to be ruptured upon radial expansion of the embossment.
Claim 2
Dependent Claim
90 words
A metal container wall which includes a vent opening means comprising a hollow flexible embossment of generally hemispherical shape formed integrally in said container wall, an integral annular wall around said embossment extending at an angle from the outer periphery thereof to said container wall around the embossment to permit radial expansion of the embossment in response to pressure applied thereagainst, and further having at least one radially extending weakening line in the outer periphery of the embossment which is adapted to be ruptured upon radial expansion of the embossment.
Claim 3
Dependent Claim
19 words
A container wall as set forth in claim 1 in which said annular wall has a thinned zone therein.
Claim 4
Dependent Claim
16 words
A container wall as set forth in claim 1 in which said embossment is upwardly convex.
Claim 5
Dependent Claim
29 words
A container wall as set forth in claim 3 in which an iNclined wall extends upwardly and outwardly from the base of said embossment to the container wall therearound.
Claim 6
Dependent Claim
28 words
A container wall as set forth in claim 4 in which the top of said embossment is at or below the top surface of the container wall therearound.
Claim 7
Dependent Claim
134 words
A vacuum sealed container-closure assembly comprising a container with a mouth opening including a top sealing surface and an outer side surface, and a metal closure on the container having a top end wall with gasket material on its undersurface around the periphery thereof for sealing against said top sealing surface of the container and a vent opening means in said top end wall including an upwardly convex flexible embossment, an integral annular wall around said embossment extending at an angle from the outer periphery thereof to said top end wall around the embossment to permit radial expansion of the embossment in response to pressure applied thereagainst, and at least one radially extending score line in the outer periphery of the embossment which is adapted to be ruptured upon radial expansion of the embossment.
Claim 8
Dependent Claim
134 words
A vacuum sealed container-closure assembly comprising a container with a mouth opening including a top sealing surface and an outer side surface, and a metal closure on the container having a top end wall with gasket material on its undersurface around the periphery thereof for sealing against said top sealing surface of the container and a vent opening means in said top end wall including an upwardly convex flexible embossment, an integral annular wall around said embossment extending at an angle from the outer periphery thereof to said top end wall around the embossment to permit radial expansion of the embossment in response to pressure applied thereagainst, and at least one radially extending score line in the outer periphery of the embossment which is adapted to be ruptured upon radial expansion of the embossment.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |