Patent US3747792A successfully refreshed from Google Patents.
US3747792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linerless closure
Assignee: THATCHER PLASTIC PACKAGING Inc A CORP OF
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Filing: 1971-11-30
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Granted: 1973-07-24
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Expires: 1991-11-30
Abstract
Abstract The present invention relates to a unique unitary linerless closure for closuring containers whose neck is provided with a Ushaped groove in the top wall of the container neck, the U-shaped groove having sidewalls which slant outwardly and upwardly at an angle, the closure being provided with substantially circular radially spaced ribs depending from the lower surface of the top portion of the closure, the outer walls of the ribs slanting downwardly and inwardly at the same angle, said ribs being undercut by their inner walls and adapted to sealingly engage the groove when said closure is seated on said container neck.
Inventors
- 👤 E Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:32
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/02; B65D41/04; B65D41/0407; B65D41/0428; Y; Y10; Y10S; Y10S215/00; Y10S215/01
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
133 words
In combination: a container having a substantially U-shaped groove about the top surface thereof, said groove having opposite sidewalls slanting upwardly and outwardly from each other when viewed in crosssection; and, a linerless closure mounted on said container comprising a top portion having a peripherally depending skirt portion and a pair of concentric substantially circular ribs integral with and depending from said top portion, the outer walls of said ribs extending downwardly and inwardly towards each other in a direction that is substantially parallel with the respective sidewalls of said U-shaped groove to provide a sealing contact along a plane between said outer walls and said sidewalls, said closure mounted on said container in a manner such that the top portion of said closure does not contact the top surface of said container.
Claim 2
Dependent Claim
133 words
In combination: a container having a substantially U-shaped groove about the top surface thereof, said groove having opposite sidewalls slanting upwardly and outwardly from each other when viewed in crosssection; and, a linerless closure mounted on said container comprising a top portion having a peripherally depending skirt portion and a pair of concentric substantially circular ribs integral with and depending from said top portion, the outer walls of said ribs extending downwardly and inwardly towards each other in a direction that is substantially parallel with the respective sidewalls of said U-shaped groove to provide a sealing contact along a plane between said outer walls and said sidewalls, said closure mounted on said container in a manner such that the top portion of said closure does not contact the top surface of said container.
Claim 3
Dependent Claim
23 words
A closure as described and claimed in claim 1 wherein the vertical height of said ribs exceeds the vertical height of said groove.
Claim 4
Dependent Claim
44 words
A closure as described and claimed in claim 1 wherein said ribs are provided with inner walls which extend upwardly and outwardly at an angle less than an angle which is made by the outer walls with a line vertical to said top portion.
Claim 5
Dependent Claim
18 words
A closure as described and claimed in claim 3 wherein said ribs are provided with rounded lower ends.
Claim 6
Dependent Claim
36 words
A closure as described and claimed in claim 4 wherein said ribs are sufficiently deformable to permit sealing contact with the sidewalls of said groove where physical variations have occurred to said closure or container neck.
Claim 7
Dependent Claim
18 words
A unitary linerless closure as described and claimed in claim 1 wherein said top portion is resiliently deformable.
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |