Patent US5145085A successfully refreshed from Google Patents.
US5145085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Initially sealed reclosable container closure
Assignee: University of Wisconsin–Stout
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Filing: 1992-01-29
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Granted: 1992-09-08
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Expires: 2012-01-29
Abstract
Abstract A container closure is provided for initially hermetically sealing a container and for thereafter reclosing the container. The closure includes a top wall with a hinged flap portion and a locking segment for engaging and retaining the flap when it is depressed downwardly to reclose the container. A portion of the peripheral edge of the flap is initially defined by a frangible seal. Once the frangible seal has been ruptured, the flap can be pivoted about its hinge to open the container and provide access to its contents. Between uses, the flap is depressed downwardly past a flange which projects from the locking wall. The flange holds the flap closed until a positive opening force is applied to the flap.
Inventors
- 👤 Charles E. Yost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:56
CPC Classifications
B; B65; B65D; B65D47/00; B65D47/04; B65D47/06; B65D47/10; B65D47/103; B65D17/00; B65D17/28; B65D17/401; B65D17/4012; B65D17/4014
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
158 words
A container closure comprising: a top wall including a flap portion having a peripheral edge defined by a straight hinge and a frangible membrane, rupture of said frangible membrane defining a free peripheral edge of said flap portion so that the flap portion can be pivoted about said hinge; a locking wall portion depending downwardly from said top wall along at least a portion of the length of said frangible membrane on a side thereof opposite to said flap portion; and a flange element projecting from a plane of said locking wall portion toward said flap portion, whereby, following rupture of said frangible membrane, said flap portion can be depressed downwardly by pivoting about said hinge to urge the free peripheral edge of the flap portion past said flange element, said flange element thereafter retaining said flap portion thus depressed until the flap portion is positively pulled upwardly to urge said free peripheral edge past said flange element.
Claim 2
Dependent Claim
158 words
A container closure comprising: a top wall including a flap portion having a peripheral edge defined by a straight hinge and a frangible membrane, rupture of said frangible membrane defining a free peripheral edge of said flap portion so that the flap portion can be pivoted about said hinge; a locking wall portion depending downwardly from said top wall along at least a portion of the length of said frangible membrane on a side thereof opposite to said flap portion; and a flange element projecting from a plane of said locking wall portion toward said flap portion, whereby, following rupture of said frangible membrane, said flap portion can be depressed downwardly by pivoting about said hinge to urge the free peripheral edge of the flap portion past said flange element, said flange element thereafter retaining said flap portion thus depressed until the flap portion is positively pulled upwardly to urge said free peripheral edge past said flange element.
Claim 3
Dependent Claim
36 words
A container closure as claimed in claim 1, further comprising a stop rim element projecting from said plane of said locking wall toward said flap portion, said stop rim element being defined below said flange element.
Claim 4
Dependent Claim
26 words
A container closure as claimed in claim 1, wherein said flap portion is integrally formed with said top wall and said hinge is a living hinge.
Claim 5
Dependent Claim
25 words
A container closure as claimed in claim 3, wherein said living hinge is defined by a single area of reduced thickness in said top wall.
Claim 6
Dependent Claim
26 words
A container closure as claimed in claim 3, wherein said living hinge is defined by first and second areas of reduced thickness in said top wall.
Claim 7
Dependent Claim
19 words
A container closure as claimed in claim 1, further comprising a gripping tab projecting upwardly from said flap portion.
Claim 8
Dependent Claim
30 words
A container closure as claimed in claim 1, in combination with a container having and an open upper end, said closure being mounted to said upper end of said container.
Claim 9
Dependent Claim
22 words
A container closure as claimed in claim 1, further comprising a side wall, said side wall being fixed to said top wall.
Claim 10
Dependent Claim
21 words
A container closure as claimed in claim 8, wherein said locking wall portion being spaced radially inwardly from said side wall.
Claim 11
Dependent Claim
22 words
A container closure as claimed in claim 8, wherein said locking wall portion is defined as a part of said side wall.
Claim 12
Dependent Claim
175 words
A container comprising: at least one side wall defining a product receiving compartment and an open top end; a top wall closing said top end including a flap portion having a peripheral edge defined by a straight hinge and a frangible membrane, rupture of said frangible membrane defining a free peripheral edge of said flap portion so that the flap portion can be pivoted about said hinge; a locking wall portion depending downwardly from said top wall along at least a portion of the length of said frangible membrane on a side thereof opposite to said flap portion; a flange element projecting from a plane of said locking wall portion toward said flap portion; whereby, following rupture of said frangible membrane, said flap portion can be depressed downwardly by pivoting about said hinge to urge the free peripheral edge of the flap portion past said flange element, said flange element thereafter retaining said flap portion thus depressed until the flap portion is positively pulled upwardly to urge said free peripheral edge past said flange element.
Claim 13
Dependent Claim
175 words
A container comprising: at least one side wall defining a product receiving compartment and an open top end; a top wall closing said top end including a flap portion having a peripheral edge defined by a straight hinge and a frangible membrane, rupture of said frangible membrane defining a free peripheral edge of said flap portion so that the flap portion can be pivoted about said hinge; a locking wall portion depending downwardly from said top wall along at least a portion of the length of said frangible membrane on a side thereof opposite to said flap portion; a flange element projecting from a plane of said locking wall portion toward said flap portion; whereby, following rupture of said frangible membrane, said flap portion can be depressed downwardly by pivoting about said hinge to urge the free peripheral edge of the flap portion past said flange element, said flange element thereafter retaining said flap portion thus depressed until the flap portion is positively pulled upwardly to urge said free peripheral edge past said flange element.
Claim 14
Dependent Claim
35 words
A container as claimed in claim 11, further comprising a stop rim element projecting from said plane of said locking wall toward said flap portion, said stop rim element being defined below said flange element.
Claim 15
Dependent Claim
25 words
A container as claimed in claim 11, wherein said flap portion is integrally formed with said top wall and said hinge is a living hinge.
Claim 16
Dependent Claim
24 words
A container as claimed in claim 13, wherein said living hinge is defined by a single area of reduced thickness in said top wall.
Claim 17
Dependent Claim
25 words
A container as claimed in claim 13, wherein said living hinge is defined by first and second areas of reduced thickness in said top wall.
Claim 18
Dependent Claim
18 words
A container as claimed in claim 11, further comprising a gripping tab projecting upwardly from said flap portion.
Claim 19
Dependent Claim
21 words
A container as claimed in claim 11, wherein said at least one side wall is fixed to said locking wall portion.
Claim 20
Dependent Claim
23 words
A container as claimed in claim 11, wherein said locking wall portion is spaced radially inwardly from said at least one side wall.
Claim 21
Dependent Claim
24 words
A container as claimed in claim 11, wherein said locking wall portion is defined as a part of said at least one side wall.
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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) | 1995-09-08 | 1996-03-09 | 1996-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-08 | 2000-03-09 | 2000-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-08 | 2004-03-09 | 2004-09-08 | $7700.00 | Window Closed / Lapsed |