Patent US3727784A successfully refreshed from Google Patents.
US3727784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure for bottle
Assignee: Thetford LLC
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Filing: 1971-10-20
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Granted: 1973-04-17
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Expires: 1991-10-20
Abstract
Abstract A closure for a flexible bottle made of polyethylene or other material having similar physical properties. The closure and the bottle are shaped so that when the closure is screwed onto the neck of the bottle sealing occurs between the closure and the bottles at the end surface of the neck and at the inner and outer edges of the upper end of the neck.
Inventors
- 👤 F Sargent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:58
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: 5
Claim 1
Independent Claim
199 words
In combination, a flexible bottle having a neck that includes an externally threaded portion and a cylindrical portion located above the threaded portion and defining the outlet of the bottle, the outlet end of the neck having an upper wall with radially inner and outer edges in spaced relation, and a closure for said bottle comprising a top wall with an annular rib on its lower surface and a circular side wall spaced radially outward of said annular rib, said side wall including an internally threaded lower portion in threaded engagement with the threaded portion of said bottle and an inwardly converging portion extending between said threaded lower portion and said top wall, said inwardly converging portion being a frusto-conical surface originating at the upper end and at the radially inner extremity of said threaded lower portion, the smallest diameter of said inwardly converging portion being less than the external diameter of said outer edge of said upper wall in the unstressed state of said bottle so that when the closure is screwed onto the bottle the annular portion of the bottle will be constricted radially inwardly by said inwardly converging portion and into engagement with said annular rib.
Claim 2
Dependent Claim
199 words
In combination, a flexible bottle having a neck that includes an externally threaded portion and a cylindrical portion located above the threaded portion and defining the outlet of the bottle, the outlet end of the neck having an upper wall with radially inner and outer edges in spaced relation, and a closure for said bottle comprising a top wall with an annular rib on its lower surface and a circular side wall spaced radially outward of said annular rib, said side wall including an internally threaded lower portion in threaded engagement with the threaded portion of said bottle and an inwardly converging portion extending between said threaded lower portion and said top wall, said inwardly converging portion being a frusto-conical surface originating at the upper end and at the radially inner extremity of said threaded lower portion, the smallest diameter of said inwardly converging portion being less than the external diameter of said outer edge of said upper wall in the unstressed state of said bottle so that when the closure is screwed onto the bottle the annular portion of the bottle will be constricted radially inwardly by said inwardly converging portion and into engagement with said annular rib.
Claim 3
Dependent Claim
77 words
The combination that is defined in claim 1, wherein the radial dimension at said top wall between said annular rib and said inwardly converging portion is less than the radial dimension between said inner and outer edges of said neck so that screwing the closure fully onto the bottle will squeeze the inner and outer surfaces of the neck together causing the upper wall thereof to bulge into sealing relation with the top wall of said closure.
Claim 4
Dependent Claim
26 words
The combination that is defined in claim 2, wherein said annular rib has a radially outer surface that diverges outwardly until it intersects said top wall.
Claim 5
Dependent Claim
54 words
The combination that is defined in claim 1, wherein said annular rib has a radially outer surface that diverges outwardly until it intersects said top wall, the largest diameter of said outer surface being greater than the internal diameter of said inner edge of said upper wall in the unstressed state of said bottle.
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |