Patent US4813561A successfully refreshed from Google Patents.
US4813561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite retortable closure
Assignee: Anchor Hocking Packaging Co
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Filing: 1988-02-29
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Granted: 1989-03-21
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Expires: 2008-02-29
Abstract
Abstract A closure is described for sealing retortable containers. The closure has a disc shaped metal cover with a grooved sealing portion at its outer edge containing a sealant and a plastic ring for engaging the container. A clamping action holds sealant in the cover groove against a rim of the container and the relative dimensions of the closure groove and the container are chosen for providing a tight seal particularly after retorting.
Inventors
- 👤 Charles S. Ochs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:36
CPC Classifications
B; B65; B65D; B65D51/00; B65D51/14; B65D51/145; B65D41/00; B65D41/32; B65D41/34; B65D41/3404; B65D41/3409; B65D41/3423; B65D41/3428
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
130 words
A sealed package comprising the combination of: a container 3; a composite closure 1 having a metal cover 2 and a molded plastic ring 4 sealing the container; a generally cylindrical annular sealing surface on the radially innermost surface of the container rim 17; the annular outer edge of said metal cover 2 having a downwardly facing groove 7; a grooved sealant 8 in said metal cover 2 groove 7; and means creating a pressure contact between said container rim 17 annular sealing surface and the radially innermost surface of said sealant 8 groove provided by said sealant 8 groove at its center line D having a greater diameter than the diameter C of said container rim 17 at its center line when the container 3 is at room temperature.
Claim 2
Dependent Claim
130 words
A sealed package comprising the combination of: a container 3; a composite closure 1 having a metal cover 2 and a molded plastic ring 4 sealing the container; a generally cylindrical annular sealing surface on the radially innermost surface of the container rim 17; the annular outer edge of said metal cover 2 having a downwardly facing groove 7; a grooved sealant 8 in said metal cover 2 groove 7; and means creating a pressure contact between said container rim 17 annular sealing surface and the radially innermost surface of said sealant 8 groove provided by said sealant 8 groove at its center line D having a greater diameter than the diameter C of said container rim 17 at its center line when the container 3 is at room temperature.
Claim 3
Dependent Claim
14 words
The package as claimed in claim 1 in which said sealant 8 comprises plastisol.
Claim 4
Dependent Claim
16 words
The package as claimed in claim 1 in which said sealant 8 comprises a grooved plastisol.
Claim 5
Dependent Claim
28 words
The package as claimed in claim 1 which further comprises said molded plastic ring 4 having container engaging 11 for holding said cover 2 on the container 3.
Claim 6
Dependent Claim
19 words
The package as claimed in claim 4 which further comprises a tamper indicating tear strip 12 on said ring.
Claim 7
Dependent Claim
41 words
The package as claimed in claim 5 in which there are flexible ratchet means 21 releasably interlocking said tear strip 12 with the container 3 for tearing said tear strip 12 from said ring 4 upon removal of said closure 2.
Claim 8
Dependent Claim
42 words
The package as claimed in claim 6 which further comprises an enlarged diameter portion 24 on said container 3 downwardly from the lower edge of said plastic ring 4 for engaging said tear strip 12 when torn from said plastic ring 4.
Claim 9
Dependent Claim
21 words
The package as claimed in claim 4 in which said container engaging means 11 comprises threads with flat upper thread surfaces.
Claim 10
Dependent Claim
17 words
The package as claimed in claim 1 in which said sealant 8 is sprayed on said cover.
Claim 11
Dependent Claim
22 words
The package as claimed in claim 1 in which said sealant 8 comprises plastisol with a molded container rim 17 engaging groove.
Claim 12
Dependent Claim
16 words
The package as claimed in claim 1 in which the container 3 comprises a barrier plastic.
References Cited (Backward Citations)
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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) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |