Tamper-proof closure and method of making same
US4209101A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 14, 1977 |
| Grant date | Jun 24, 1980 |
| Priority date | — |
| Expiry date | Sep 14, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2401/25
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A tamper-proof closure for a container including an endwall and an annular, threaded sidewall. The sidewall includes an internal projection for mating with a part of the container to prevent turning of the closure when the closure is mounted on said container. A tear tab is provided on the sidewall radially outwardly of the projection. The sidewall includes tear facilitating portions on circumferentially opposite sides of the tear tab to enhance tearing of the sidewall on opposite sides of the tear tab to permit the tear tab and the projection to be swung outwardly to a removed position in which the closure can be turned. Another aspect of the invention includes a method of making the closure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.