US4076140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tamperproof closure element
Assignee: Astra Plastique SA
•
Filing: 1977-01-13
•
Granted: 1978-02-28
•
Expires: 1997-01-13
Abstract
Abstract A temperproof closure element integrally formed from molded synthetic material. The top cap section has a series of outwardly spaced projections which cooperate with mating inwardly spaced projections on a tear strip. A locking collar is provided with a similar series of inwardly spaced projections corresponding with mating outwardly directed projections on the same tear strip. The thickness of material along each of the set of mating projections is diminished providing a zone of reduced strength so that the tear strip can be removed prior to first use of the container containing the closure element.
Inventors
- 👤 Raymond Perne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:30
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/32; B65D41/46; B65D41/48; B65D41/485; B65D2401/00; B65D2401/15; B65D2401/25
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
175 words
An improved tamperproof closure element to be applied to the neck of a container, the closure element having a top cap section joined to a tear strip which has a lower container gripping collar, the tear strip being attached to said cap section along abutting faces at an annular zone of reduced strength, the cap section and collar and tear strip being integrally formed of molded synthetic material, the improvement comprising at the annular zone between the tear strip and the cap section: a first annular series of spaced projections extending radially from the section toward the tear strip; a second annular series of spaced projections extending radially from the tear strip toward the section, the projections of said series being shaped to mutually interfit to provide a continuous closure; and the projections of each annular series of projections being partially axially displaced from the projections of the adjacent interfitting series of projections to reduce to a thin layer the material which joins the tear strip to the adjacent section where said projections are mated.
Claim 2
Dependent Claim
175 words
An improved tamperproof closure element to be applied to the neck of a container, the closure element having a top cap section joined to a tear strip which has a lower container gripping collar, the tear strip being attached to said cap section along abutting faces at an annular zone of reduced strength, the cap section and collar and tear strip being integrally formed of molded synthetic material, the improvement comprising at the annular zone between the tear strip and the cap section: a first annular series of spaced projections extending radially from the section toward the tear strip; a second annular series of spaced projections extending radially from the tear strip toward the section, the projections of said series being shaped to mutually interfit to provide a continuous closure; and the projections of each annular series of projections being partially axially displaced from the projections of the adjacent interfitting series of projections to reduce to a thin layer the material which joins the tear strip to the adjacent section where said projections are mated.
Claim 3
Dependent Claim
33 words
A closure element as set forth in claim 1, wherein said projections are shaped such that the thin layer of material where they mate defines a substantially trapezoidal intersection occupying a radial plane.
References Cited (Backward Citations)
US3424330A
Cited
US3901404A
Cited
GB1399737A
Cited
US3817416A
Cited
US3837518A
Cited
US3871545A
Cited
US3980195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |