US3893583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tamperproof container and closure assembly
Assignee: Glasgow Royal Infirmary
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Filing: 1974-03-07
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Granted: 1975-07-08
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Expires: 1994-03-07
Abstract
Abstract A tamperproof container and closure assembly, in which the complete closure comprises a retaining tear band integral with a screw cap, has a discontinuous thread on the cap for engagement with a discontinuous thread on the container. The cooperating threads have sloping surfaces so arranged that the closure may be readily screwed or pushed into position on the container but once in position the closure can only be turned round and round but cannot be removed until the retaining band has been torn away.
Inventors
- 👤 Kevin William Mclaren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:44
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/32; B65D41/34; B65D41/3442; B65D2401/00; B65D2401/15; B65D2401/25
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
23 words
A container and closure assembly according to claim 1 wherein the cap has an internal screw-thread and the container has an external screw-thread.
Claim 2
Dependent Claim
22 words
A container and closure assembly according to claim 1 wherein the sloping angle of the threads is between 15* and 45* .
Claim 3
Dependent Claim
16 words
A container and closure assembly according to claim 3 wherein the sloping angle is substantially 30*.
Claim 4
Dependent Claim
16 words
A container and closure assembly according to claim 1 wherein the screw threads have four gaps.
Claim 5
Dependent Claim
33 words
A container and closure assembly according to dlaim 1 wherein the cap part of the closure has an internal annular sealing fillet to seat around the outside of the mouth of the container.
Claim 6
Dependent Claim
15 words
A container and closure assembly according to claim 1 wherein the container is a jar.
Claim 7
Dependent Claim
131 words
A container and closure assembly in which the complete closure comprises a screw cap and a retaining band to be torn away when it is desired to open the container characterised by the provision of a discontinuous external screw thread with sloping upper surfaces and straight lower surfaces around the mouth of the container for engagement by a discontinuous internal screw thread with straight upper surfaces and straight lower surfaces provided on the screw cap, the arrangement being such that when the complete closure is being screwed on to the container there is an interlocking action between the screw threads but if an attempt be made to unscrew the complete closure there is a sliding action and the closure simply goes round and round but does not come off the container.
References Cited (Backward Citations)
US3595420A
Cited
US3519159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |